WO2014019397A1 - 发射电路、收发机、通信系统和发射数据的方法 - Google Patents

发射电路、收发机、通信系统和发射数据的方法 Download PDF

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Publication number
WO2014019397A1
WO2014019397A1 PCT/CN2013/076135 CN2013076135W WO2014019397A1 WO 2014019397 A1 WO2014019397 A1 WO 2014019397A1 CN 2013076135 W CN2013076135 W CN 2013076135W WO 2014019397 A1 WO2014019397 A1 WO 2014019397A1
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WIPO (PCT)
Prior art keywords
signal
digital
sub
analog
circuit
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Ceased
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PCT/CN2013/076135
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English (en)
French (fr)
Inventor
童文
王光健
黄煌
严茜
刘坤鹏
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP13825847.0A priority Critical patent/EP2874318B1/en
Publication of WO2014019397A1 publication Critical patent/WO2014019397A1/zh
Priority to US14/610,667 priority patent/US9712363B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2649Demodulators
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/068Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using space frequency diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter only
    • H04L27/2627Modulators

Definitions

  • the present invention relates to the field of communications, and more particularly to a transmitting circuit, a transceiver, a communication system, and a method of transmitting data. Background technique
  • E-Band microwave technology is favored by medium- and long-range high-speed wireless point-to-point systems because of its 10 GHz (71-76 GHz and 81-86 GHz) bandwidth and its low atmospheric fading.
  • ADC analog-to-digital conversion
  • DAC digital-to-analog conversion devices.
  • the time domain interleaved sampling method or the frequency domain multi-channel sampling method can usually be used to solve the ADC/DAC bottleneck caused by high bandwidth and high speed.
  • these two methods require complex post-processing of the ADC/DAC output signal, which reduces system performance.
  • Embodiments of the present invention provide a transmitting circuit, a transceiver, a communication system, and a method of transmitting data, which can reduce the complexity of transceiver processing and thereby improve system performance.
  • a transmitting circuit including: a digital interface circuit, configured to obtain first data to be transmitted on a predetermined bandwidth, and decompose the first data into parallel N first first digital signal streams, where the N The first sub-digital signal stream in the first sub-digital signal stream occupies a small bandwidth In the predetermined bandwidth, N is a positive integer; a digital modulation circuit, configured to receive the N first first digital signal stream, and modulate the N first first digital signal stream to obtain N first modulation signals; a first frequency shifting circuit, configured to receive the N first modulated signals, and perform frequency shifting on the N first modulated signals, wherein adjacent first modulations of the N first modulated signals after frequency shifting There is no frequency band interval between the signals; the first synthesizer is configured to merge the M first modulated signals of the N first modulated signals after the frequency shift into the first bandwidth signal, where M is a positive integer; And a mode converter, configured to receive the first bandwidth signal, and perform digital-to-analog conversion on the first bandwidth signal to obtain
  • a transceiver including: a receiving circuit and the above transmitting circuit, wherein the receiver circuit includes: a down converting circuit for converting a radio frequency signal received on a receiving antenna into an analog signal; an intermediate frequency power a splitter for decomposing the analog signal into Q parallel sub-analog signal streams; a second frequency shifting circuit for frequency shifting the Q parallel sub-analog signal streams; Q analog-to-digital converters Performing analog-to-digital conversion on the Q parallel sub-analog signal streams to obtain Q parallel digital signal streams; and digital demodulation circuit demodulating the Q parallel digital signal streams to obtain Q parallel demodulation a signal; a digital interface circuit that synthesizes the Q parallel demodulated signals into second data.
  • a communication system comprising a transmitter and a receiver, wherein the transmitter comprises the above transmitting circuit; the receiver comprises: a down conversion circuit for receiving the radio frequency received on the receiving antenna The signal is converted into an analog signal; the intermediate frequency power divider is configured to decompose the analog signal into N parallel sub-analog signal streams; and the second frequency shifting circuit is configured to frequency-shift the N parallel sub-analog signal streams N analog-to-digital converters for respectively performing analog-to-digital conversion on the N parallel sub-analog signal streams to obtain N parallel digital signal streams; and a digital demodulation circuit for demodulating the N parallel digital signal streams Processing, obtaining N parallel demodulated signals; and a digital interface circuit synthesizing the N parallel demodulated signals into the first data.
  • a method for transmitting data including: obtaining first data to be transmitted on a predetermined bandwidth, and decomposing the first data into parallel N first first digital signal streams, where the N path is first
  • Each of the first sub-digital signal streams in the sub-digital signal stream occupies less than the predetermined bandwidth, and N is a positive integer; modulating the N-th first sub-digital signal stream to obtain N-channel first modulated signals;
  • the N-channel first modulated signal performs frequency shifting, wherein there is no band spacing between adjacent first modulated signals in the N-channel first modulated signals after frequency shifting;
  • the M-channel first modulated signals in the N-channel first modulated signals after the frequency shifting are merged into a first bandwidth signal, M is a positive integer; performing digital-to-analog conversion on the first bandwidth signal to obtain a first analog signal;
  • the analog signal is converted to a radio frequency signal for transmission on the antenna.
  • a method for transmitting data including: a method for receiving data and a method for transmitting data, where the method for receiving data includes: converting a radio frequency signal received on a receiving antenna into an analog signal; Decomposing the analog signal into Q parallel sub-analog signal streams; frequency-like shifting the Q parallel sub-analog signal streams; performing analog-to-digital conversion on the Q parallel sub-analog signal streams respectively to obtain Q parallel Digital signal stream; demodulating the Q parallel digital signal streams to obtain Q parallel demodulated signals; synthesizing the Q parallel demodulated signals into second data.
  • a communication method including: a method for receiving data and a method for transmitting data according to the foregoing; wherein the method for receiving data includes: converting the radio frequency signal received on a receiving antenna into an analog signal; Decomposing the analog signal into N parallel sub-analog signal streams; performing frequency-like shifting on the N parallel sub-analog signal streams; respectively performing analog-to-digital conversion on the N parallel sub-analog signal streams to obtain N parallel Digital signal stream; demodulating the N parallel digital signal streams to obtain N parallel demodulated signals; synthesizing the N parallel demodulated signals into the first data.
  • the transmitting circuit of the technical solution can decompose the data into parallel multi-channel sub-digital signal streams, respectively modulate and frequency-shift the multi-channel sub-digital signal streams, and then combine them into a large-bandwidth signal, and then use a digital-to-analog converter to convert the large bandwidth.
  • the signal is converted into an analog signal and finally converted into an RF signal by upconversion. Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and can independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. It can reduce the complexity of processing and thus improve system performance.
  • FIG. 1 is a schematic circuit block diagram of a transmitting circuit in accordance with a first embodiment of the present invention.
  • 2 is a schematic circuit block diagram of a transmitting circuit in accordance with a second embodiment of the present invention.
  • 3 is a schematic circuit block diagram of a transmitting circuit in accordance with a third embodiment of the present invention.
  • 4 is a schematic circuit block diagram of a transmitting circuit in accordance with a fourth embodiment of the present invention.
  • Figure 5 is a schematic circuit block diagram of a transceiver in accordance with a fifth embodiment of the present invention.
  • Figure 6 is a schematic circuit block diagram of a communication system in accordance with a sixth embodiment of the present invention.
  • 7A and 7B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to a seventh embodiment of the present invention.
  • 8A and 8B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to an eighth embodiment of the present invention.
  • 9A and 9B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to a ninth embodiment of the present invention.
  • Figure 10 is a circuit diagram of a transceiver in accordance with a tenth embodiment of the present invention.
  • Figure 11 is a circuit diagram of a transceiver in accordance with an eleventh embodiment of the present invention.
  • Figure 12 is a circuit block diagram of a synthesizer in accordance with an embodiment of the present invention.
  • Figure 13 is a schematic flow chart of a method of transmitting data in accordance with a twelfth embodiment of the present invention.
  • Figure 14 is a schematic flow chart of a method of transmitting data according to a thirteenth embodiment of the present invention.
  • Figure 15 is a schematic flow chart of a communication method in accordance with a fourteenth embodiment of the present invention. detailed description
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • UMTS Universal Mobile Telecommunications System
  • Different network elements can be included in the system.
  • the network elements of the radio access network in the LTE and the LTE-A include an eNB (eNodeB, an evolved base station), and the network elements of the radio access network in the WCDMA include an RNC (Radio Network Controller) and a NodeB, similar to Other wireless networks, such as WiMax (Worldwide Interoperability for Microwave Access), may also use a scheme similar to the embodiment of the present invention, and the related modules in the system may be different. Not limited.
  • Embodiments of the present invention provide an embodiment of a high speed millimeter wave (especially E-Band) system, which can be applied to a back haul technique of microwave communication, and embodiments according to the present invention are not limited thereto, and It can be used in other microwave or wireless communication systems, such as wireless point-to-point systems and the like.
  • a high speed millimeter wave especially E-Band
  • E-Band millimeter wave
  • FIG. 1 is a schematic circuit block diagram of a transmitting circuit 100 in accordance with a first embodiment of the present invention.
  • the digital interface circuit 110 obtains the first data to be transmitted on a predetermined bandwidth, and decomposes the first data into parallel N-channel first sub-digital signal streams, each of the first ones of the N-channel first sub-digital signal streams
  • the digital signal stream occupies less than the predetermined bandwidth, and N is a positive integer.
  • the digital modulation circuit 120 receives the N-channel first sub-digital signal stream, and modulates the N-channel first sub-digital signal stream to obtain N-channel first modulated signals.
  • the first frequency shifting circuit 130 receives the N first modulated signal, and performs frequency shifting on the N first modulated signal, wherein the adjacent first modulated signal of the N first modulated signals after the frequency shifting There is no band spacing between them.
  • the first synthesizer 140 is configured to combine the M first modulation signals of the N first modulated signals after the frequency shift into a first bandwidth signal, where M is a positive integer.
  • the first digital-to-analog converter 150 is configured to receive the first bandwidth signal, and perform digital-to-analog conversion on the first bandwidth signal to obtain the first analog signal.
  • the up-conversion circuit 160 receives the first analog signal and converts the first analog signal into An RF signal to transmit the RF signal on the antenna.
  • a predetermined bandwidth can be split into N sub-bands and processed independently for each sub-band, i.e., independently transmitted and received.
  • the N sub-digital signal streams can be independently processed in the transmit channel of the transmitting circuit, and at least a portion of the sub-digital signal streams of the N consecutive sub-digital signal streams of the frequency band can be combined into one data stream and counted by a DAC.
  • the analog signal is converted, and the converted analog signal is processed by the analog circuit and then sent out by the transmitting antenna.
  • the digital interface unit decomposes a single data stream or a plurality of data streams into multiple parallel data streams (ie, multiple sub-digital signal streams), for example, can decompose one user's 4-bit data into Four 1-bit sub-digital signal streams, or two-way 2-bit data of the user are decomposed into four 1-bit sub-digital signal streams.
  • the digital modulator digitally modulates the N-channel sub-digital signal stream to obtain N-channel first modulated signals having the same frequency.
  • the digital modulation circuit can separately modulate the N sub-digital signal streams using N FPGAs.
  • the first frequency shifting circuit can perform frequency shifting on the N first modulated signals by using N frequencies, respectively, to obtain N consecutive frequency modulated signals without frequency band intervals.
  • the first frequency shifting circuit can use N mixing frequencies respectively.
  • the corresponding N local oscillators perform frequency shifting on the N first modulated signals.
  • the first synthesizer synthesizes at least a portion of the modulated signals of the N modulated signals into a large bandwidth signal.
  • a high speed DAC performs an analog conversion of the large bandwidth signal and is sent out through the upconversion circuit.
  • each sub-band is processed independently at the transmitting end, each sub-band can be split by a band-pass filter at the receiving end, and the sub-digital signal stream is obtained by sampling by a low-speed ADC, and finally each sub-band is independently The sub-digital signal is digitally demodulated.
  • each of the first sub-digital signal streams may be equal or unequal, and M may be less than N or equal to N.
  • M may be less than N or equal to N.
  • M when M is less than N, part of the sub-digital signal streams are synthesized into a large bandwidth signal; when M is equal to N, all sub-digital signal streams are synthesized into a large bandwidth signal.
  • a transmitting circuit can decompose data into parallel multi-channel sub-digital signal streams, respectively modulate and frequency-shift multiple multi-sub-digital signal streams, and then combine them into a large-bandwidth signal, and then use a digital-to-analog converter.
  • the large bandwidth signal is converted into an analog signal, and finally converted into a radio frequency signal by up-conversion. Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and can independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. It can reduce the complexity of transceiver signal processing, thereby improving system performance. Since there is no band spacing between the multiplexed signals after frequency shifting, the utilization of the spectrum is improved.
  • the first synthesizer 480 may include an adder for adding the frequency-shifted N first modulated signals to be combined into a first wideband signal.
  • N may be at least 4, and embodiments according to the present invention are not limited thereto, and N may be less than 4.
  • the first data can be at least one binary digital signal stream.
  • the transmitting circuit of the block diagram 2 includes: a digital interface circuit 210, a digital modulation circuit 220, a first frequency shifting circuit 230, and a first synthesizer 240. a first digital-to-analog converter 250 and an up-conversion circuit 260, which are combined with the digital interface circuit 110, the digital modulation circuit 120, the first frequency shifting circuit 130, the first synthesizer 140, and the first digital-to-analog converter 150 of FIG.
  • the up-conversion circuit 160 is similar and will not be described herein.
  • the transmitting circuit 200 of FIG. 2 further includes: a second synthesizer 270 and a second digital to analog converter 280.
  • the second synthesizer 270 combines the L first modulated signals of the N first modulated signals after the frequency shift into a second bandwidth signal, wherein the L first modulated signals are different from the M first modulated signals That is, the L channel first modulation signal is a signal other than the M channel first modulation information among the N channel first modulation signals, and L is a positive integer.
  • the second digital-to-analog converter 280 receives the second bandwidth signal, and performs digital-to-analog conversion on the second bandwidth signal to obtain a second analog signal, where the up-conversion circuit 260 is configured to receive the first analog signal and the second analog signal, and An analog signal and a second analog signal are combined into the RF signal.
  • the first frequency shifting circuit may perform frequency shifting on the N first modulated signals by using N frequencies having the same interval, respectively, so that the bandwidth of the N first modulated signals after the frequency shifting is continuous, that is, the N path is first.
  • the bandwidth of the modulated signal is adjacent.
  • the first frequency shifting circuit may further perform frequency shifting on the L first modulated signals by using L frequencies having the same interval, and frequency shifting the M first modulated signals by using M frequencies having the same interval respectively. In this case, there may be a bandwidth overlap or a frequency interval between the first analog signal and the second analog signal.
  • the up-conversion circuit 160 further performs the first analog signal and the second analog signal before combining the first analog signal and the second analog signal into the RF signal. Frequency shifting.
  • the first analog signal and the second analog signal may be further frequency-shifted so as to pass the frequency-shifted first analog signal.
  • the bandwidth of the second analog signal is continuous and there is no frequency spacing or overlap.
  • FIG. 3 is a schematic circuit block diagram of a transmitting circuit 300 in accordance with a third embodiment of the present invention.
  • the transmitting circuit of the embodiment of Fig. 3 includes a transmitting circuit corresponding to each of a plurality of antennas (e.g., a first antenna and a second antenna) to enable support of a multi-antenna system.
  • the transmitting circuit corresponding to the first antenna has the same function as each unit in the transmitting circuit corresponding to the second antenna.
  • the transmitting circuit 300 of FIG. 3 includes: a digital interface circuit 310, a digital modulation circuit 320, a first frequency shifting circuit 330, a first synthesizer 340, a first digital-to-analog converter 350, and a first up-converting circuit. 360, which is similar to the digital interface circuit 110, the digital modulation circuit 120, the first frequency shifting circuit 130, the first synthesizer 140, the first digital-to-analog converter 150, and the up-converting circuit 160 of FIG. 1, and will not be described herein.
  • the transmitting circuit 300 of FIG. 3 further includes: a second frequency shifting circuit 370, a second synthesizer 380, a second digital-to-analog converter 390, and a second up-converting circuit 395.
  • the second frequency shifting circuit 370 receives the N second modulated signals, and performs frequency shifting on the N second modulated signals, wherein the adjacent second modulated signals of the N second modulated signals after the frequency shifting There is no band spacing between them.
  • the second synthesizer 380 combines the N-channel second modulated signals that have been frequency-shifted into a second bandwidth signal.
  • the second digital to analog converter 390 receives the second bandwidth signal and performs digital to analog conversion on the second bandwidth signal to obtain a second analog signal.
  • the first upconversion circuit 360 receives the first analog signal and converts the first analog signal to a first radio frequency signal to transmit the first radio frequency signal on the first antenna.
  • the second upconversion circuit 395 receives the second analog signal and converts the second analog signal to a second radio frequency signal to transmit the second radio frequency signal on the second antenna.
  • the digital modulation circuit 320 includes N modulators, and the N modulators respectively modulate the N first sub-digital signal streams, and the N modulators respectively pair the N second sub-children The digital signal stream is modulated.
  • the modulator described above can be implemented by an FPGA, and the first sub-digital signal stream corresponding to the first antenna and the second sub-digital signal stream corresponding to the second antenna are digitally modulated using the same FPGA.
  • the first modulated signal and the second modulated signal output from the same FPGA can be output to a mixer that uses the same frequency for frequency shifting. Because of the independence of each frequency domain subchannel, high-complexity digital processing devices and FPGAs can be distributed across multiple different DSP/FPGA slices/boards, making implementation easier and more flexible.
  • the first digital data corresponding to the first antenna or the second digital signal corresponding to the second data corresponding to the second antenna is synthesized into a large bandwidth signal, and a digital-to-analog conversion is performed using a DAC, that is, At the transmitting end, all subchannels corresponding to each antenna use only one high speed DAC and one set of analog intermediate frequency circuits, thus saving the device and cost of the transmitting circuit.
  • the transmit circuit of the embodiment of Figure 4 includes transmit circuitry corresponding to multi-polarization (e.g., H-pole and V-polarization) to enable support of a multi-polarized antenna system.
  • multi-polarization e.g., H-pole and V-polarization
  • the transmitting circuit 400 of FIG. 4 includes: a digital interface circuit 410, a digital modulation circuit 420, a first frequency shifting circuit 430, a first synthesizer 440, a first digital-to-analog converter 450, and a first up-converting circuit 460, which are shown in FIG.
  • the digital interface circuit 110, the digital modulation circuit 120, the first frequency shifting circuit 130, the first synthesizer 140, the first digital-to-analog converter 150, and the up-converting circuit 160 are similar, and are not described herein again.
  • the digital interface circuit 410 further obtains the second data to be transmitted on the predetermined bandwidth, and decomposes the second data into parallel K-channel second sub-digital signal streams, each of the K-channel second sub-digital signal streams
  • the bandwidth occupied by the two sub-digital signal streams is less than the predetermined bandwidth, and K is a positive integer.
  • the digital modulation circuit 420 also receives the K-channel second sub-digital signal stream and modulates the K-channel second sub-digital signal stream on the V-polarization to obtain a K-channel second modulated signal.
  • the transmitting circuit 300 further includes: a second digital modulation circuit 425, a second frequency shift circuit 470, a second synthesizer 480, a second digital-to-analog converter 490, a second digital-to-analog converter 490, a second up-conversion circuit 495, and a coupling 465.
  • the second digital modulation circuit 425 receives the K-channel second sub-digital signal stream, and modulates the K-channel second sub-digital signal stream on the V-polarization to obtain the K-channel second modulated signal; the second frequency shifting circuit The 470 receives the K-channel second modulated signal, and performs frequency shifting on the K-channel second modulated signal, wherein there is no frequency band gap between adjacent second modulated signals in the K-channel second modulated signal after frequency shifting; The second synthesizer combines the K-channel second modulated signals after the frequency shifting into a second bandwidth signal; the second digital-to-analog converter 490 receives the second bandwidth signal, and performs digital-to-analog conversion on the second bandwidth signal to obtain a second An analog signal; wherein the first up-conversion circuit 460 receives the first analog signal and converts the first analog signal into the first radio frequency signal.
  • the second up-conversion circuit 495 receives the second analog signal and converts the second analog signal into the second RF signal.
  • Coupler 465 couples the first radio frequency signal and the second radio frequency signal to transmit the first radio frequency signal and the second radio frequency signal on the dual polarized antenna.
  • the digital modulation circuit 420 includes N+K modulators, wherein the N of the modulators respectively modulate the N first sub-digital signal streams, and the K modulators respectively respectively determine the K The second sub-digital signal stream is modulated, where N can be equal to K.
  • FIG. 5 is a schematic circuit block diagram of a transceiver 500 in accordance with a fifth embodiment of the present invention.
  • the transceiver 500 includes: a receiving circuit and a transmitting circuit.
  • the transmitting circuit of FIG. 5 may include: a digital interface circuit 510, a digital modulation circuit 520, a first frequency shifting circuit 530, a first synthesizer 540, a first digital to analog converter 550, and an upconversion circuit 560, which are the same as the number of FIG.
  • the interface circuit 110, the digital modulation circuit 120, the first frequency shifting circuit 130, the first synthesizer 140, the first digital-to-analog converter 150, and the up-converting circuit 160 are similar, and are not described herein again.
  • the receiver circuit described above may include a down conversion circuit 595, an intermediate frequency power divider 590, a second frequency shifting circuit 580, and a plurality of analog to digital converters 570.
  • the down conversion circuit 595 converts the radio frequency signal received on the receiving antenna into an analog signal.
  • the intermediate frequency power splitter 590 decomposes the analog signal into one parallel sub-analog signal stream.
  • the second frequency shifting circuit 580 frequency shifts the plurality of parallel sub-analog signal streams.
  • An analog-to-digital converter 570 performs analog-to-digital conversion on each of the parallel sub-analog signal streams to obtain a parallel digital signal stream.
  • the digital demodulation circuit 525 demodulates the above-described parallel digital signal streams to obtain a parallel demodulated signal.
  • the digital interface circuit 510 synthesizes the above-described parallel demodulated signals into the second data.
  • the data can be decomposed into parallel multi-channel sub-digital signal streams, and the multi-channel sub-digital signal streams are respectively modulated and frequency-shifted, and then combined into a large-bandwidth signal, and then used.
  • a digital-to-analog converter converts the large bandwidth signal into an analog signal and finally converts it into a radio frequency signal by upconversion. Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. Reduces the complexity of transceiver signal processing, thereby improving system performance.
  • the requirement of the ADC can be reduced by sampling at the receiving end through the frequency domain sub-channel, and at the transmitting end, the sub-channel is divided by the digital domain, so that the receiving end can be used for each independent frequency.
  • the domain subchannel is processed.
  • each frequency domain subchannel can transmit data independently, which increases the flexibility of the system.
  • high-complexity digital processing devices and FPGAs can be distributed across multiple DSP/FPGA slices/boards, using only one high-speed DAC and one set of analogs. The transmission of the IF circuit saves the associated components and costs.
  • FIG. 6 is a schematic circuit block diagram of a communication system 600 in accordance with a sixth embodiment of the present invention.
  • Communication system 600 includes a transmitter and a receiver.
  • the transmitter of Figure 6 includes the transmit circuitry of Figures 1, 2, 3 or 4.
  • the transmitting circuit includes: a digital interface circuit 610, a digital modulation circuit 620, a first frequency shifting circuit 630, a first synthesizer 540, a first digital to analog converter 650, and an upconversion circuit 660, which is coupled to the digital interface circuit 110 of FIG.
  • the digital modulating circuit 120, the first frequency shifting circuit 130, the first synthesizer 140, the first digital-to-analog converter 150, and the up-converting circuit 160 are similar, and are not described herein again.
  • the receiver includes: a down conversion circuit 665, an intermediate frequency power divider 655, a second frequency shift circuit 645, a Q analog to digital converter 635, a digital demodulation circuit 625, and a digital interface circuit 615.
  • the down conversion circuit 665 converts the radio frequency signal received on the receiving antenna into an analog signal.
  • the intermediate frequency power splitter 655 decomposes the analog signal into Q parallel sub-analog signal streams.
  • the second frequency shifting circuit 645 frequency shifts the Q parallel sub-analog signal streams.
  • the Q analog-to-digital converters 635 perform analog-to-digital conversion on the Q parallel sub-analog signal streams to obtain Q parallel digital signal streams.
  • the digital demodulation circuit 625 demodulates the Q parallel digital signal streams to obtain Q parallel demodulated signals.
  • Digital interface circuit 615 combines the above Q parallel demodulated signals into first data, where in application Q can be equal to N.
  • the data can be decomposed into parallel multi-channel sub-digital signal streams, respectively modulating and frequency-shifting the multi-channel sub-digital signal streams, and then merging into large-bandwidth signals, and then using a digital-to-analog converter to the large bandwidth
  • the signal is converted into an analog signal, and finally converted into an injection by up-conversion.
  • Frequency signal Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. Reduces the complexity of transceiver signal processing, thereby improving system performance.
  • the requirement of the ADC can be reduced by sampling at the receiving end through the frequency domain sub-channel, and at the transmitting end, the sub-channel is divided by the digital domain, so that the receiving end can be used for each independent frequency.
  • the domain subchannel is processed.
  • each frequency domain subchannel can transmit data independently, which increases the flexibility of the system.
  • high-complexity digital processing devices and FPGAs can be distributed across multiple DSP/FPGA slices/boards, using only one high-speed DAC and one set of analogs. The transmission of the IF circuit saves the associated components and costs.
  • Figure 10 is a circuit diagram of a transceiver in accordance with a tenth embodiment of the present invention.
  • Figure 12 is a circuit block diagram of a synthesizer in accordance with an embodiment of the present invention.
  • the transceiver of Figure 10 is an example of the transceiver of Figure 5.
  • the transceiver's transmit circuitry includes a DAC
  • the transceiver's receive circuitry consists of N ADCs, ie, the number of ADCs is N times the number of DACs.
  • the transceiver can be divided into three parts: digital modulation and demodulation part, analog intermediate frequency part and analog radio frequency part, where the analog intermediate frequency part and the analog radio frequency part are simulated. The working principle of the transceiver is described in detail below.
  • digital interface circuit 1001 obtains data at a predetermined bandwidth (e.g., 5 GHz) and decomposes the data into parallel N-way sub-digital signal streams, each sub-digital signal stream occupying a bandwidth less than the predetermined bandwidth. For example, if data with a total bandwidth of 5 GHz is decomposed into four digital signal streams (ie, four sub-channels), the bandwidth of each sub-digital signal stream is 1.25 GHz. For example, a 4-bit data can be divided into 4 1 bits, or two 2 bits of data can be divided into 4 1 bits and transmitted in 4 sub-channels.
  • a predetermined bandwidth e.g., 5 GHz
  • a digital modulation circuit composed of N (for example, 4) field programmable gate arrays (FPGAs) 1002-1005 receives the N-channel sub-digital signal stream, and modulates the N-channel sub-digital signal stream to obtain an N-channel modulated signal.
  • N FPGAs 1002-1005 correspond to N-way sub-digital signal streams.
  • the digital modulation circuit can also be implemented by using an Application Specific Integrated Circuit (ASIC) or the like according to an embodiment of the present invention.
  • ASIC Application Specific Integrated Circuit
  • N sub-digital signal streams are respectively composed of N FPGAs
  • each FPGA is handled by itself.
  • the function of each FPGA is the same, the FPGA of each subchannel Mainly (using single-carrier or multi-carrier modulation) to complete the modulation of the digital signal.
  • the modulation of the sub-digital signal stream includes, without limitation, channel coding, symbol mapping modulation, OFDM modulation, pulse shaping, sample rate conversion, pre-emphasis, pre-equalization, peak-to-average ratio suppression, and the like.
  • Each FPGA may include: an encoding module for encoding an input sub-digital signal stream, for example, Low-density Parity-check (LDPC) encoding; a constellation point mapping module for inputting a sub- The digital signal stream is mapped to a corresponding constellation point, for example, 64-phase Quadrature Amplitude Modulation (QAM); an Inverse Fast Fourier Transform (IFFT) module, for inputting the sub-digital signal stream Fourier inverse transform to convert the frequency domain signal into a time domain signal; a windowing module for simultaneously or separately adding a time domain window and a frequency domain window to the input time domain signal; a framing module for use in the signal A preamble sequence or the like is inserted to complete the framing function; a sampling rate conversion module is used to convert the sampling rate to the sampling rate of the DAC.
  • LDPC Low-density Parity-check
  • a constellation point mapping module for inputting a sub- The digital signal stream is mapped to a corresponding constellation
  • the synthesizer 1010 combines the above-described N-way modulated signals that have been frequency-shifted into a large-bandwidth signal.
  • the synthesizer 1010 can include an adder 1210 and a SINC function 1220.
  • the SINC function 1220 is used to compensate for the synthesized large bandwidth signal and output the compensated signal to the DAC 1011.
  • the DAC 1011 receives a large bandwidth signal from the synthesizer 1010, and digitally converts the large bandwidth signal to obtain an analog signal, and outputs the output analog signal to the up-conversion circuit.
  • the up-conversion circuit receives the analog signal output by the DAC 1011, and converts the analog signal into a radio frequency signal to transmit the radio frequency signal on the antenna, and the up-conversion circuit may include an analog intermediate frequency portion The up-conversion of the sub-frequency and the up-conversion of the analog radio section. Specifically, in the analog intermediate frequency portion, the analog signal output from the DAC 1011 is subjected to analog intermediate frequency modulation (ie, first up-conversion) by the mixer 1012 and the local oscillator, and then passed through a band pass filter (Band Pass Filter, BPF). The 1013 performs filtering, is amplified by the amplifier 1014, and finally outputs the amplified analog signal to the analog RF portion.
  • analog intermediate frequency modulation ie, first up-conversion
  • BPF Band Pass Filter
  • the analog signal output from the analog IF section is upconverted by the mixer 1015 and the local oscillator f (second upconversion), amplified by the amplifier 1016, and then filtered by the BPF 1017.
  • the amplifier 1018 is amplified and finally sent to the antenna 1020 via the duplexer 1019 for transmission.
  • the antenna 1020 receives the radio frequency signal transmitted from the opposite transceiver, and the radio frequency signal enters the receiving circuit of the transceiver through the duplexer 1019, and then is filtered by the BPF 1049, and then amplified by the amplifier 1048, and finally mixed.
  • the frequency converter 1047 and the local oscillator f are down-converted to obtain an analog intermediate frequency signal.
  • the analog intermediate frequency signal passes through the intermediate frequency power splitter 1046 to obtain parallel sub-analog signal streams of N identical frequency points respectively transmitted in the N subchannels.
  • Each sub-stream of analog signals via respective amplifiers 1042 - 1045 is amplified, and then filtered through BPF 1038-1041, 1034-1037 and then through a mixer and a local oscillator, ⁇ ⁇ ⁇ , frequency shift (intermediate frequency downconverts), Move it to the desired frequency and finally filter it through BPF 1030 ⁇ 1033.
  • the frequency of each sub-analog signal after each intermediate frequency processing is the same, that is, the frequency of the output signal of the FPGA of the transmitting end is the same.
  • the plurality of parallel sub-data streams processed by the intermediate frequency are sampled by respective ADCs to obtain sub-digital signal streams (ie, discrete sampling signals) of each sub-channel, and output to a digital demodulation circuit composed of N FPGAs for demodulation processing. .
  • the working principle of the digital demodulation circuit is as follows:
  • the sub-digital signal streams of each sub-channel are processed by respective FPGAs to obtain a transmission bit decision signal corresponding to each sub-digital signal stream.
  • the FPGA processing of each sub-channel mainly completes the demodulation of the digital signal, including single-carrier or multi-carrier modulation.
  • the demodulation of the digital signal includes not limited to channel estimation, code demodulation, sample rate conversion, synchronization, equalization, and the like.
  • Each FPGA may include: a sampling rate conversion module for converting the sampling rate of the ADC to a sampling rate of the symbol rate; an automatic gain control module for estimating the input signal power and adjusting the gain of the analog device; a module for performing a frame synchronization function; a frequency offset estimation and compensation module for estimating and compensating a carrier frequency offset and a sampling frequency offset; an FFT module for converting a time domain signal into a frequency domain signal; and a channel estimation module For performing channel estimation, thereby implementing coherent detection on the signal; residual frequency offset estimation and compensation module, for residual carrier frequency The bias and sampling frequency offsets are estimated and compensated; the phase noise cancellation module is used to eliminate the phase noise introduced by the RF device; and the decoding module is used to complete the decoding of the data.
  • the transmit bit decision signals of the plurality of sub-channels processed by the FPGA are synthesized by the digital interface circuit 1001 to obtain a high-speed reception decision signal.
  • the requirement of the ADC can be reduced by sampling at the receiving end through the frequency domain sub-channel, and at the transmitting end, the sub-channel is divided by the digital domain, so that the receiving end can be used for each independent frequency.
  • the domain subchannel is processed.
  • each frequency domain subchannel can transmit data independently, which increases the flexibility of the system.
  • high-complexity digital processing devices and FPGAs can be distributed across multiple DSP/FPGA slices/boards, using only one high-speed DAC and one set of analogs. The transmission of the IF circuit saves the associated components and costs.
  • Figure 11 is a circuit diagram of a transceiver in accordance with an eleventh embodiment of the present invention.
  • the transmitting circuit in the transceiver of Fig. 11 is an example of the embodiment of Fig. 2.
  • the transmitting circuit of the transceiver of Fig. 11 may include M DACs, and the number of ADCs of the receiving circuit is N*M, that is, the number of ADCs is N times the number of DACs.
  • the digital interface circuit 1101 obtains data at a predetermined bandwidth (for example, 5 GHz) and decomposes the data into parallel M*N way sub-digital signal streams, each sub-digital signal stream occupying a bandwidth smaller than the predetermined bandwidth. For example, if data with a total bandwidth of 5 GHz is decomposed into 2*N sub-digital signal streams (i.e., 2*N sub-channels), the bandwidth of each sub-digital signal stream is 5/(2*N) GHz.
  • a predetermined bandwidth for example, 5 GHz
  • a predetermined bandwidth for example, 5 GHz
  • the bandwidth of each sub-digital signal stream is 5/(2*N) GHz.
  • a digital modulation circuit composed of 2*N FPGAs 1102-1105 receives a 2*N sub-digital signal stream, and modulates the 2*N-channel sub-digital signal stream to obtain a 2*N-channel modulated signal, wherein 2*N
  • the FPGA 1102-1105 corresponds to a 2*N way sub-digital signal stream.
  • a frequency shifting circuit composed of N mixers 1106 to 1107 and N local oscillators fi ⁇ f N having a frequency of ⁇ receives N modulated signals output by the N FPGAs 1102-1103, and performs the above-described N modulated signals. Mixing and frequency shifting.
  • a frequency shift circuit composed of another N mixers 1108 to 1109 and N local oscillators having a frequency of ⁇ f N receives N modulated signals output by the N FPGAs 1104-1105, and mixes the N modulated signals. Frequency and frequency Move.
  • the synthesizer 1110 combines the N modulated signals that have been frequency shifted by the N mixers 1006 to 1007 into a large bandwidth signal.
  • the DAC 1111 and the DAC 1112 receive two large bandwidth signals from the synthesizer 1110 and the synthesizer 1111, respectively, digital-to-analog conversion of the two large-bandwidth signals to obtain an analog signal, and output the output analog signal to the up-conversion circuit.
  • the upconversion circuit receives the analog signal output by the DAC 1111 and the DAC 1112, and converts the analog signal into a radio frequency signal for transmitting the radio frequency signal on the antenna. Specifically, in the analog intermediate frequency portion, the analog signals output from the DAC 1111 and the DAC 1112 are filtered by the BPF 1113 and the BPF 1114, respectively, and passed through the mixer 1115 and the local oscillator &, and the mixer 1116 and the local oscillator g m . The intermediate frequency up-conversion and frequency-like shift are then filtered by BPF 1117 and BPF 1118, amplified by amplifier 1119 and amplifier 1120, and finally the two analog signals output by amplifier 1119 and amplifier 1120 are amplified by intermediate frequency power combiner 1116.
  • the analog radio frequency portion of FIG. 11 includes a mixer 1121, a local oscillator f c , an amplifier 1122 , a BPF 1123 , and an amplifier 1124 , which are similar to the respective units of the analog radio frequency portion of FIG. 10 , and are not described herein again.
  • the output of the analog radio section is sent to antenna 1126 via duplexer 1125 for transmission.
  • the functions of the FPGAs 1150 to 1153 are similar to those of the receiving circuit of FIG. 10 and will not be described herein.
  • the receiving circuit of FIG. 11 is different from the receiving circuit of FIG. 10 in that the mixers 1138 to 1139 and the local oscillator having a frequency of + & are frequency-shifted to the outputs of the BPFs 1134 to 1135. Shift, and the mixer 1140 ⁇ 1141 and a frequency f m + g m of the output of the local oscillator in frequency to the BPF 1136-1137.
  • FIGS. 7A and 7B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to a seventh embodiment of the present invention.
  • the transmitting and receiving circuits of Figures 7A and 7B are examples of the embodiment of Figure 4.
  • the transmitting circuit of the embodiment of FIG. 7A modulates the large bandwidth signal by H polarization and V polarization respectively to obtain an H polarization signal and a V polarization signal, and then respectively transmits the H and V polarization signals through the dual polarization antenna.
  • the receiving circuit of FIG. 7B receives and demodulates the H polarized signal and the V polarized signal from the dual polarized antenna.
  • the antenna 720 of the transmitting circuit and the antenna 770 of the receiving circuit are dual-polarized antennas, and the digital modulation circuit modulates the N-way sub-digital signal stream on the H-polarization and the V-polarization, respectively.
  • the embodiment of Figure 7A includes two DACs 711 and DAC 731 corresponding to H and V polarizations, respectively.
  • the digital interface circuit 701 obtains data on a predetermined bandwidth (e.g., 5 GHz) and decomposes the data into parallel N-way sub-digital signal streams. Similarly, corresponding to the DAC 731, the digital interface circuit 701 can obtain an N-way sub-digital signal stream.
  • a predetermined bandwidth e.g., 5 GHz
  • the digital interface circuit 701 can obtain an N-way sub-digital signal stream.
  • the transmitting circuit corresponding to the H polarization includes: N FPGAs 702-705, N mixers 706-709 and a local oscillator of frequency ⁇ , synthesizer 710, DAC 711, BPF 713, amplifier 714, mixing The 715 and the local oscillator of the frequency f, the amplifier 716, the BPF 717, and the amplifier 718 have functions similar to those of the transmitting circuit of FIG. 10, and are not described herein again.
  • the transmitting circuit corresponding to the V polarization includes: N FPGAs 722-725, N mixers 726-729 and a local oscillator of frequency ⁇ f N , a synthesizer 730, a DAC 731, a BPF 733, an amplifier 734, a hybrid
  • the frequency converter 735 is a local oscillator having a frequency of 1 ⁇ 2, the amplifier 736, the BPF 737, and the amplifier 738.
  • these units are similar to the corresponding units of the transmitting circuit of FIG. 10, and are not described herein again. Unlike the transmitting circuit of FIG.
  • the amplifier 718 and the amplifier 738 respectively transmit the H polarized signal and the V polarized signal to the coupler (OMT) 719, and the coupler 719 converts the H polarized signal and the V polarized signal into The dual polarized signal is output to a dual polarized 720 antenna.
  • OMT coupler
  • the coupler 769 converts the bipolarized signal received from the dual polarized antenna 770 into an H polarized signal and a V polarized signal.
  • the receiving circuit corresponding to the H polarization includes: BPF 768, amplifier 767, mixer 766 and local oscillator fRF, intermediate frequency power splitter 765, amplifier 761 ⁇ 764, BPF 757 ⁇ 760, mixed Frequency divider 756 and a frequency of 753 ⁇ , ⁇ ⁇ ⁇ , local oscillator BPF 749-752, ADC 745-748 and FPGA 741-744, each of these units and the units of the receiving circuit 10 is similar to FIG, not described herein again .
  • the receiving circuits corresponding to the V polarization include: BPF 798, amplifier 797, mixer 796 and local oscillator fRF, intermediate frequency power splitter 785, amplifiers 791-794, BPF 787-790, mixers 783-786 and frequency is, ⁇ ⁇ ⁇ , local oscillator, BPF 779-782, ADC 775-778 and FPGA 771 ⁇ 774, the respective units of the reception circuit unit 10 of FIG similar, are not repeated here. Different from the receiving circuit of FIG.
  • the coupler 769 receives the dual-polarized signal received by the dual-polarized antenna 770, converts the dual-polarized signal into an H-polarized signal and a V-polarized signal, and outputs the same to the amplifier 768 and Amplifier 798.
  • FIGS. 8A and 8B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to an eighth embodiment of the present invention.
  • the transmitting and receiving circuits of Figures 8A and 8B are examples of the embodiment of Figure 3.
  • the transmitting circuit of the embodiment of Fig. 8A corresponds to a plurality of antennas 1 to M
  • the receiving circuit of Fig. 8B corresponds to a plurality of antennas 1 to N.
  • the large bandwidth signals are separately modulated and then transmitted through each antenna.
  • corresponding signals are received and demodulated corresponding to each antenna.
  • the digital interface circuit 701 obtains data on a predetermined bandwidth (e.g., 5 GHz) and decomposes the data into parallel N-way sub-digital signal streams.
  • a predetermined bandwidth e.g., 5 GHz
  • the transmitting circuit comprises: N FPGAs 802 ⁇ 805, N mixers 806 ⁇ 809 and a local oscillator of frequency fi ⁇ fN , synthesizer 810, D AC 811, mixer 812 and frequency
  • the local oscillator of the f IF , the BPF 813, the amplifier 814, the mixer 815, and the local oscillator of the frequency, the amplifier 816, the BPF 817, and the amplifier 818, the functions of these units are similar to those of the transmitting circuit of FIG. This will not be repeated here.
  • the transmitting circuit comprises: N FPGAs 802-805, N mixers 826 ⁇ 829 and a local oscillator of frequency f ⁇ fN , a synthesizer 830, a DAC 831, a mixer 832 and a frequency of f IF local oscillator, BPF 833, amplifier 834, mixer 835 and local oscillator of frequency fRF, amplifier 836, BPF 837 and amplifier 838, the functions of these units are similar to the corresponding units of the transmitting circuit of Figure 10, This will not be repeated here.
  • the amplifier 818 and the amplifier 838 respectively output radio frequency signals to the antenna 1 and the antenna M.
  • the sub-digital signal stream corresponding to the transmitting circuit of the antenna 1 and the sub-digital signal stream corresponding to the transmitting circuit of the antenna M are digitally modulated using the same FPGA.
  • the two modulated signals output by the FPGA 802 are respectively output to the mixer 806 and the mixer 826, and the two modulated signals output from the mixer FPGA 803 are output to the mixer 807 and the mixer 827, respectively.
  • the receiving circuit corresponding to the antenna 1 includes: a BPF 868, an amplifier 867, a mixer 866 and a local oscillator fRp, an intermediate frequency power splitter 865, amplifiers 861-764, BPF 857-760, mixed frequency divider 856 and a frequency of 853 ⁇ , ⁇ ⁇ ⁇ , local oscillator BPF 849-752, ADC 845-848 and FPGA 841 ⁇ 844, similar to each of these elements and the receiving circuit of Figure 10, not described herein again .
  • the receiving circuit corresponding to the antenna N includes: a BPF 898, an amplifier 897, a mixer 896 and a local oscillator fRp, an intermediate frequency power splitter 895, amplifiers 891 to 894, BPF 897-890, mixers 883 to 886, and a frequency of , ⁇ ⁇ ⁇ , local oscillator BPF 879-882, ADC 875-878 and FPGA 841 ⁇ 844, similar to each of these elements and the receiving circuit of Figure 10, are not repeated here.
  • amplifier 868 and amplifier 898 receive radio frequency signals from antenna 1 and antenna N, respectively.
  • the sub-digital signal stream corresponding to the receiving circuit of the antenna 1 and the sub-digital signal stream corresponding to the receiving circuit of the antenna N are digitally demodulated using the same FPGA.
  • both ADC 845 and ADC 875 output digital signals to FPGA 841 for digital demodulation
  • ADC 846 and ADC 876 both output digital signals to FPGA 842 for digital demodulation, and so on.
  • FIGS. 9A and 9B are circuit diagrams of a transmitting circuit and a receiving circuit, respectively, according to a ninth embodiment of the present invention.
  • the transmitting circuit and the receiving circuit of Fig. 9A are examples of the combination of Figs. 3 and 4.
  • FIG. 9A includes transmission circuits respectively corresponding to a plurality of dual-polarized antennas 1 to dual-polarized antennas M
  • the embodiment of FIG. 9B includes receptions corresponding to a plurality of dual-polarized antennas 1 to dual-polarized antennas N, respectively.
  • each of the dual-polarized antennas corresponding to the transmitting circuit modulates the large-bandwidth signal with H-polarization and V-polarization respectively to obtain an H-polarized signal and a V-polarized signal, and then respectively converts H and V through the dual-polarized antenna
  • the polarized signals are transmitted, and the receiving circuit corresponding to each dual-polarized antenna receives and demodulates the H-polarized signal and the V-polarized signal from the dual-polarized antenna.
  • the transmitting circuit corresponding to the dual-polarized antenna 1 includes: a transmitting circuit corresponding to the H polarization and a transmitting circuit corresponding to the V polarization.
  • the transmitting circuit corresponding to the H polarization includes: N FPGAs 902-905, N mixers 906-909 and a local oscillator of frequency fi ⁇ f N , a synthesizer 910, a DAC 911, a mixer 912, and a local Oscillator fip, BPF 913, amplifier 914, mixer 915 and local oscillator with frequency fRp, amplifier 916, BPF 917 and amplifier 918, amplifier 918 Connected to the coupler 919, the coupler 919 is connected to the antenna 920, and the functions of these units are similar to those of the transmitting circuit of FIG.
  • the transmitting circuit corresponding to the V polarization includes: N FPGAs 902'-905 ⁇ N mixers 926 ⁇ 929 and a local oscillator of frequency ⁇ , synthesizer 930, DAC 931, mixer 932, and local oscillator f 1F , BPF 933 , amplifier 934 , mixer 935 and local oscillator of frequency f, amplifier 936, BPF 937 and amplifier 938, amplifier 938 is connected to coupler 919, and coupler 919 is connected to antenna 920, these units are Corresponding units of the transmitting circuit of FIG. 7B are similar, and are not described herein again.
  • the transmitting circuit corresponding to the dual-polarized antenna M includes: a transmitting circuit corresponding to the H polarization and a transmitting circuit corresponding to the V polarization.
  • the transmitting circuit corresponding to the H polarization includes: N FPGAs 902-905, N mixers 906, ⁇ 909, and a local oscillator having a frequency of f ⁇ f N , a synthesizer 910, a DAC 911, and a mixing 912, and local oscillator, BPF 913, amplifier 914, mixer 915, and local oscillator of frequency fRp, amplifier 916, BPF 917, and amplifier 918, amplifier 918, are coupled to coupler 919 The coupler 919 is connected to the antenna 920.
  • the transmitting circuit corresponding to the V polarization includes: N FPGAs 902, ⁇ 905, N mixers 926, ⁇ 929, and a local oscillator having a frequency of ff N , a synthesizer 930, a DAC 931, a mixer 932 And a local oscillator, a BPF 933, an amplifier 934, a mixer 935, and a local oscillator of frequency fRp, an amplifier 936, a BPF 937', and an amplifier 938, an amplifier 938, coupled to the coupler 919,
  • the coupler 919 is connected to the antenna 920'.
  • These units are similar to the corresponding units of the transmitting circuit of FIG. 7B and will not be described again.
  • the receiving circuit corresponding to the dual-polarized antenna 1 includes: a receiving circuit corresponding to the H polarization and a receiving circuit corresponding to the V polarization.
  • the receiving circuit corresponding to the H polarization includes: BPF 968, amplifier 967, mixer 966 and local oscillator fRp, intermediate frequency power splitter 965, amplifier 961-964, BPF 957-960, mixer 953 ⁇ 956 and frequency is, ⁇ ⁇ ⁇ , local oscillator BPF 949-952, ADC 945-948 and FPGA 941 ⁇ 944, each of these elements is similar to the receiving circuit of FIG. 7A, which is not repeated herein.
  • the receiving circuit corresponding to the V polarization includes: BPF 998, amplifier 997, mixer 996 and local oscillator 1 ⁇ 2, intermediate frequency power splitter 995, amplifier 991-994, BPF 987-990, mixer 983 ⁇ 986 and frequency is, ⁇ ⁇ ⁇ , local oscillator, BPF 979-982, ADC 975-978 and FPGA 941 '-944', each of these elements is similar to the receiving circuit of FIG. 7B, are not repeated here.
  • the receiving circuit corresponding to the dual-polarized antenna N includes: a receiving circuit corresponding to the H polarization and a receiving circuit corresponding to the V polarization.
  • the receiving circuit corresponding to the H polarization includes: BPF 968', Amplifier 967, mixer 966, and local oscillator fRp, intermediate frequency power splitter 965, amplifier 961-964 ⁇ BPF 957, ⁇ 960, mixer 953, ⁇ 956, and frequency, ⁇ ⁇ ,
  • the local oscillators BPF 949, ⁇ 952, ADC 945, ⁇ 948, and FPGA 941 '-944' are similar to the various units of the receiving circuit of FIG. 7 and will not be described here.
  • the receiving circuit corresponding to the V polarization includes: a BPF 998, an amplifier 997, a mixer 996, and a local oscillator fRp, an intermediate frequency power splitter 995, an amplifier 991, ⁇ 994, BPF 987, ⁇ 990, Mixers 983, ⁇ 986, and local oscillators of frequency ⁇ , ⁇ ⁇ , BPF 979, ⁇ 982, ADC 975, ⁇ 978, and FPGA 941 ⁇ 944, these units and the receiving circuit of Figure 7 The units are similar and will not be described here.
  • the transmitting circuit, the transceiver, and the communication system according to the embodiment of the present invention have been described above, and a method of transmitting data and a method of transmitting data according to an embodiment of the present invention will be described below with reference to Figs. 13 to 15, respectively.
  • Figure 13 is a schematic flow chart of a method of transmitting data in accordance with a twelfth embodiment of the present invention.
  • the method of transmitting data includes the following.
  • the data can be decomposed into parallel multi-channel sub-digital signal streams, respectively modulating and frequency-shifting the multi-channel sub-digital signal streams, and then merging into large-bandwidth signals, and then using a digital-to-analog converter to the large bandwidth
  • the signal is converted into an analog signal and finally converted into an RF signal by upconversion.
  • the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. Reduces the complexity of transceiver signal processing, thereby improving system performance.
  • the method of FIG. 1 the method of FIG.
  • 13 further includes: combining the L-channel first modulated signals of the N-channel first modulated signals that are frequency-shifted into a second bandwidth signal, where the L-channel The first modulated signal is different from the first modulated signal of the M channel; performing digital-to-analog conversion on the second bandwidth signal to obtain a second analog signal, wherein in 1360, the first analog signal and the second analog signal may be combined into the RF signal .
  • the method of FIG. 13 further includes: performing frequency shifting on the first analog signal and the second analog signal respectively before combining the first analog signal and the second analog signal into the radio frequency signal.
  • the second modulated signal is merged into a second bandwidth signal; the second analog signal is digital-to-analog converted to obtain a second analog signal; wherein in 1360, the first analog signal is converted into a first RF signal for use on the first antenna Transmitting a first radio frequency signal and converting the second analog signal to a second radio frequency signal to transmit the second radio frequency signal on the second antenna.
  • the N first sub-digital signal streams may be separately modulated by N modulators, and the N second sub-digital signal streams are separately modulated by the N modulators.
  • the antenna is a dual-polarized antenna.
  • the method of FIG. 13 further includes : obtaining second data to be transmitted on the predetermined bandwidth, and decomposing the second data into parallel K-channel second sub-digital signal streams, each of the second sub-digital signal streams of the K-channel second sub-digital signal stream The bandwidth occupied by the stream is less than the predetermined bandwidth, where K is a positive integer; the second sub-digital signal stream of the K channel is modulated on the V-polarization to obtain a K-channel second modulated signal; the second modulated signal of the K-channel Performing frequency shifting, wherein there is no band spacing between adjacent second modulated signals in the K-channel second modulated signal after frequency shifting; and combining the K-channel second modulated signals after frequency shifting into a second a bandwidth signal; performing digital-to-analog conversion on the second bandwidth signal to obtain a second
  • the N first sub-digital signal streams may be separately modulated by N modulators, and the K second sub-digital signal streams are separately modulated by K modulators.
  • the adder may add the frequency-shifted N first modulated signals to combine into a first wideband signal.
  • N is at least 4 and the first data is at least one binary digital signal stream.
  • Figure 14 is a schematic flow chart of a method of transmitting data according to a thirteenth embodiment of the present invention.
  • the method of transmitting data of Fig. 14 includes a method of receiving data and a method of transmitting data of Fig. 13, wherein the method of receiving data includes the following.
  • the analog signal is decomposed into Q parallel sub-analog signal streams.
  • the data can be decomposed into parallel multi-channel sub-digital signal streams, respectively modulating and frequency-shifting the multi-channel sub-digital signal streams, and then merging into large-bandwidth signals, and then using a digital-to-analog converter to the large bandwidth
  • the signal is converted into an analog signal and finally converted into an RF signal by upconversion. Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. Reduces the complexity of transceiver signal processing, thereby improving system performance.
  • FIG. 15 is a schematic flow chart of a communication method in accordance with a fourteenth embodiment of the present invention.
  • the communication method of FIG. 15 includes a method of receiving data and a method of transmitting data as shown in FIG.
  • the above method for receiving data includes the following.
  • the analog signal is decomposed into N parallel sub-analog signal streams.
  • the data can be decomposed into parallel multi-channel sub-digital signal streams, respectively modulating and frequency-shifting the multi-channel sub-digital signal streams, and then merging into large-bandwidth signals, and then using a digital-to-analog converter to the large bandwidth
  • the signal is converted into an analog signal and finally converted into an RF signal by upconversion. Since the embodiment of the present invention can divide the large bandwidth into a plurality of sub-bands, and independently process the multi-channel sub-digital signal streams at the transmitting end and the receiving end, it is not necessary to perform complex post-processing on the analog signals after the digital-to-analog conversion. Reduces the complexity of transceiver signal processing, thereby improving system performance.
  • the embodiment of the present invention has less complexity in signal processing, the signal is not easily distorted, and there is no multiple DACs. /ADC joint control.
  • the present invention reduces the number of DACs and the need for RF processing devices in the analog end of the transmitter.
  • the band can be freely divided, without limitation, and the system is highly scalable.
  • embodiments of the present invention provide a complete - corresponding transmit and receive scheme and support systems with multiple polarization and / or multiple antennas.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

本发明提供了一种发射电路、收发机、通信系统和发射数据的方法。发射电路包括:数字接口电路,在预定带宽上获得待发送的数据,并且将数据分解为并行的N路子数字信号流;数字调制电路,接收N路子数字信号流,并且对N路子数字信号流进行调制,以获得N路调制信号;频率搬移电路,接收N路调制信号,并且对N路调制信号进行频率搬移;合成器,将经过频率搬移后的N路调制信号中的M路调制信号合并成带宽信号;数模转换器,接收带宽信号,并且对带宽信号进行数模转化获得模拟信号;上变频电路,接收模拟信号,并且将模拟信号转换为射频信号,以便在天线上发送射频信号。本发明能够降低发射电路处理信号的复杂度,从而提高了系统性能。

Description

发射电路、 收发机、 通信系统和发射数据的方法 本申请要求于 2012 年 7 月 30 日提交中国专利局、 申请号为 201210265353.5、发明名称为"发射电路、 收发机、 通信系统和发射数据的方 法"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域, 尤其是涉及一种发射电路、 收发机、 通信系统和 发射数据的方法。 背景技术
无线通信系统对带宽的要求越来越大。 E-Band微波技术因其具有 10GHz ( 71-76GHz和 81-86GHz )的带宽且处于大气衰落低谷, 得到了中长距离高 速无线点对点系统的青睐。 随着技术和芯片处理能力的提升, 高性能的信号 处理技术、 高频谱效率的调制和编码技术等都成为现实, 这都要求系统有高 效率的模数转换器件 (ADC )和数模转换器件(DAC )。
通常可以采用时域交错采样的方法或者频域多通道采样的方法解决高 带宽和高速度带来的 ADC/DAC瓶颈。 然而, 这两种方法需要对 ADC/DAC 的输出信号进行复杂的后处理, 从而降低了系统性能。
另外, D AC的速度和精度往往要高于 ADC, 因此, 在通信系统中通常 呈现 DAC/ADC能力不对称的情况。 例如, 带宽为 5GHz的 E-band对 ADC 和 DAC的最低需求高达 lOGsps,而 DAC的处理速度比 ADC更容易达到如 此高的要求。 发明内容
本发明的实施例提供了一种发射电路、 收发机、 通信系统和发射数据的 方法, 能够降低收发机处理的复杂度, 从而提高系统性能。
一方面, 提供了一种发射电路, 包括: 数字接口电路, 用于在预定带宽 上获得待发送的第一数据,并且将第一数据分解为并行的 N路第一子数字信 号流,上述 N路第一子数字信号流中的每个第一子数字信号流占用的带宽小 于该预定带宽, N为正整数; 数字调制电路, 用于接收上述 N路第一子数字 信号流, 并且对上述 N路第一子数字信号流进行调制, 以获得 N路第一调 制信号; 第一频率搬移电路, 用于接收上述 N路第一调制信号, 并且对上述 N路第一调制信号进行频率搬移,其中经过频率搬移后的上述 N路第一调制 信号中的相邻第一调制信号之间没有频带间隔; 第一合成器, 用于将经过频 率搬移后的上述 N路第一调制信号中的 M路第一调制信号合并成第一带宽 信号, M为正整数; 第一数模转换器, 用于接收第一带宽信号, 并且对第一 带宽信号进行数模转化获得第一模拟信号; 上变频电路, 用于接收第一模拟 信号,并且将第一模拟信号转换为射频信号,以便在天线上发送该射频信号。
另一方面, 提供了一种收发机, 包括: 接收电路和上述发射电路, 其中 该接收机电路, 包括: 下变频电路, 用于将在接收天线上接收的射频信号转 换为模拟信号; 中频功率分配器,用于将该模拟信号分解为 Q个并行的子模 拟信号流; 第二频率搬移电路,用于将上述 Q个并行的子模拟信号流进行频 率搬移; Q个模数转换器,用于对上述 Q个并行的子模拟信号流分别进行模 数转换获得 Q个并行的数字信号流; 数字解调电路, 对上述 Q个并行数字 信号流进行解调处理, 获得 Q个并行的解调信号; 数字接口电路, 将上述 Q 个并行的解调信号合成第二数据。
另一方面, 提供了一种通信系统, 该通信系统包括发射机和接收机, 其中该发射机包括上述发射电路; 该接收机包括: 下变频电路, 用于将在接 收天线上接收的该射频信号转换为模拟信号; 中频功率分配器, 用于将该模 拟信号分解为 N个并行的子模拟信号流; 第二频率搬移电路, 用于将上述 N 个并行的子模拟信号流进行频率般移; N个模数转换器, 用于对上述 N个并 行的子模拟信号流分别进行模数转换获得 N个并行的数字信号流;数字解调 电路, 对上述 N个并行数字信号流进行解调处理, 获得 N个并行的解调信 号; 数字接口电路, 将上述 N个并行的解调信号合成第一数据。
另一方面, 提供了一种发射数据的方法, 包括: 在预定带宽上获得待发 送的第一数据, 并且将第一数据分解为并行的 N路第一子数字信号流,上述 N路第一子数字信号流中的每个第一子数字信号流占用的带宽小于该预定 带宽, N为正整数; 对上述 N路第一子数字信号流进行调制, 以获得 N路 第一调制信号; 对上述 N路第一调制信号进行频率搬移,其中经过频率搬移 后的上述 N路第一调制信号中的相邻第一调制信号之间没有频带间隔;将经 过频率搬移后的上述 N路第一调制信号中的 M路第一调制信号合并成第一 带宽信号, M为正整数; 对第一带宽信号进行数模转化获得第一模拟信号; 将第一模拟信号转换为射频信号, 以便在天线上发送该射频信号。
另一方面, 提供了一种传输数据的方法,, 包括: 接收数据的方法和上 述发射数据的方法, 其中该接收数据的方法, 包括: 将在接收天线上接收的 射频信号转换为模拟信号; 将该模拟信号分解为 Q个并行的子模拟信号流; 将上述 Q个并行的子模拟信号流进行频率般移; 对上述 Q个并行的子模拟 信号流分别进行模数转换获得 Q个并行的数字信号流; 对上述 Q个并行数 字信号流进行解调处理, 获得 Q个并行的解调信号; 将上述 Q个并行的解 调信号合成第二数据。
另一方面, 提供了一种通信方法, 包括: 接收数据的方法和上述该的发 射数据的方法; 其中该接收数据的方法, 包括: 将在接收天线上接收的该射 频信号转换为模拟信号; 将该模拟信号分解为 N个并行的子模拟信号流; 将 上述 N个并行的子模拟信号流进行频率般移; 对上述 N个并行的子模拟信 号流分别进行模数转换获得 N个并行的数字信号流; 对上述 N个并行数字 信号流进行解调处理, 获得 N个并行的解调信号; 将上述 N个并行的解调 信号合成第一数据。
本技术方案的发射电路可以将数据分解为并行的多路子数字信号流,分 别对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使 用一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成 射频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且能够在 发送端和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需 对模拟信号进行复杂的后处理, 能够降低处理的复杂度, 从而提高了系统性 能。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例中 所需要使用的附图作筒单地介绍, 显而易见地, 下面所描述的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的 前提下, 还可以根据这些附图获得其他的附图。
图 1是根据本发明的第一实施例的一种发射电路的示意性电路框图。 图 2是根据本发明的第二实施例的一种发射电路的示意性电路框图。 图 3是根据本发明的第三实施例的一种发射电路的示意性电路框图。 图 4是根据本发明的第四实施例的一种发射电路的示意性电路框图。 图 5是根据本发明的第五实施例的一种收发机的示意性电路框图。
图 6是根据本发明的第六实施例的一种通信系统的示意性电路框图。 图 7A和图 7B分别是根据本发明的第七实施例的一种发射电路和接收 电路的电路图。
图 8A和图 8B分别是根据本发明的第八实施例的一种发射电路和接收 电路的电路图。
图 9A和图 9B分别是根据本发明的第九实施例的一种发射电路和接收 电路的电路图。
图 10是根据本发明的第十实施例的一种收发机的电路图。
图 11是根据本发明的第十一实施例的一种收发机的电路图。
图 12是根据本发明的实施例的合成器的电路框图。
图 13是根据本发明的第十二实施例的一种发射数据的方法的示意性流 程图。
图 14是根据本发明的第十三实施例的一种传输数据的方法的示意性流 程图。
图 15是根据本发明的第十四实施例的一种通信方法的示意性流程图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创 造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
应理解, 本发明的技术方案可以应用于各种通信系统, 例如: GSM ( Global System of Mobile communication,全球移动通讯 )系统、 CDMA( Code Division Multiple Access ,码分多址 )系统、 WCDMA( , Wideband Code Division Multiple Access, 宽带码分多址)系统、 GPRS ( General Packet Radio Service , 通用分组无线业务)、 LTE ( Long Term Evolution, 长期演进) 系统、 LTE-A ( Advanced long term evolution, 先进的长期演进) 系统、 UMTS ( Universal Mobile Telecommunication System, 通用移动通信系统)等。 系统中可包括不同的网元。例如, LTE和 LTE-A中无线接入网络的网元包括 eNB ( eNodeB , 演进型基站), WCDMA 中无线接入网络的网元包括 RNC ( Radio Network Controller, 无线网络控制器)和 NodeB, 类似地, WiMax ( Worldwide Interoperability for Microwave Access , 全球微波互联接入 )等其 它无线网络也可以使用与本发明实施例类似的方案, 只 ^^站系统中的相关 模块可能有所不同, 本发明实施例并不限定。
本发明的实施例提供了一种高速毫米波(特别是 E-Band ) 系统的实施 方案, 可以应用于微波通信的回程(back haul )技术中, 根据本发明的实施 例并不限于此, 也可用于其它微波或无线通信系统, 例如, 无线点对点系统 等等。
采用时域交错采样的方法或者频域多通道采样的方法解决高带宽和高 速度带来的 ADC/DAC瓶颈时, 除了需要对 ADC/DAC的输出信号进行复杂 的后处理之外, 还容易造成传输的信号失真, 使得系统性能难以保证。 这两 种方法对 DAC/ADC的同步有很高的要求,导致对多个 DAC/ADC的联合控 制难度增大。
图 1 是根据本发明的第一实施例的一种发射电路 100 的示意性电路框 图。 数字接口电路 110、 数字调制电路 120、 第一频率搬移电路 130、 第一合 成器 140、 第一数模转换器 150和上变频电路 160。
数字接口电路 110在预定带宽上获得待发送的第一数据, 并且将第一数 据分解为并行的 N路第一子数字信号流, 上述 N路第一子数字信号流中的 每个第一子数字信号流占用的带宽小于该预定带宽, N为正整数。 数字调制 电路 120接收上述 N路第一子数字信号流, 并且对上述 N路第一子数字信 号流进行调制, 以获得 N路第一调制信号。第一频率搬移电路 130接收上述 N路第一调制信号, 并且对上述 N路第一调制信号进行频率搬移, 其中经过 频率搬移后的上述 N路第一调制信号中的相邻第一调制信号之间没有频带 间隔。 第一合成器 140, 用于将经过频率搬移后的上述 N路第一调制信号中 的 M路第一调制信号合并成第一带宽信号, M为正整数。 第一数模转换器 150, 用于接收第一带宽信号, 并且对第一带宽信号进行数模转化获得第一 模拟信号。 上变频电路 160接收第一模拟信号, 并且将第一模拟信号转换为 射频信号, 以便在天线上发送该射频信号。
根据本发明的实施例可以将预定的带宽拆分成 N个子带,并且对各个子 带独立处理, 即独立发送和接收。 换句话说, 可以在发射电路的发射通道中 对 N路子数字信号流进行独立处理, 将频带连续的 N路子数字信号流中的 至少一部分子数字信号流合成一个数据流, 并且通过一个 DAC进行数模变 换, 转换得到的模拟信号通过模拟电路处理后由发送天线发送出去。
具体来说, 在发送端, 数字接口单元将单个数据流或多个数据流分解成 多路并行的数据流(即多个子数字信号流), 例如, 可以将用户的一路 4比 特的数据分解成 4路 1比特的子数字信号流, 或者将用户的两路 2比特的数 据分解成 4路 1比特的子数字信号流。 然后,数字调制器对 N路子数字信号 流进行数字调制, 得到具有相同的频点的 N路第一调制信号, 例如, 数字调 制电路可以分别使用 N个 FPGA对 N个子数字信号流进行调制。 第一频率 搬移电路可以分别使用 N个频率对 N路第一调制信号进行频率搬移,得到 N 路频率连续的、 没有频带间隔的调制信号, 例如, 第一频率搬移电路可以分 别使用 N个混频器以及对应的 N个本地振荡器对 N路第一调制信号进行频 率搬移。第一合成器将 N路调制信号中的至少一部分调制信号合成大带宽信 号。 一个高速 DAC对该大带宽信号进行模拟转换, 并且经过上变频电路发 送出去。 由于在发送端对每个子带进行了独立的处理, 使得在接收端可以通 过带通滤波器将每个子带拆分出来, 并且通过低速 ADC采样得到子数字信 号流, 最后独立地对每个子带的子数字信号进行数字解调。
应理解, 每个第一子数字信号流占用的带宽可以相等也可以不相等, 并 且 M可以小于 N, 也可以等于 N。 例如, 当 M小于 N时, 部分子数字信号 流被合成为大带宽信号; 当 M等于 N时, 所有的子数字信号流被合成为大 带宽信号。
根据本发明的实施例的发射电路可以将数据分解为并行的多路子数字 信号流, 分别对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽 信号, 再使用一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上 变频转换成射频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且能够在发送端和接收端独立对多路子数字信号流进行处理, 因而在数模 转换后无需对模拟信号进行复杂的后处理, 能够降低收发机信号处理的复杂 度, 从而提高了系统性能。 由于经过频率搬移后多路调制信号之间没有频带间隔, 因此, 提高了频 谱的利用率。
另外, 由于在发射端多个子通道仅使用一个高速 DAC和一套模拟中频 电路, 因此, 并且节省了发射电路的器件和成本。
根据本发明的实施例, 第一合成器 480可以包括加法器, 该加法器用于 将经过频率搬移的上述 N个第一调制信号相加, 以合并成第一宽带信号。
根据本发明的实施例, N可以至少为 4, 根据本发明的实施例并不限于 此, N也可以小于 4。 另外, 第一数据可以为至少一个二进制数字信号流。
图 2是根据本发明的第二实施例的一种发射电路 200 的示意性电路框 图 2的发射电路包括: 数字接口电路 210、 数字调制电路 220、 第一频 率搬移电路 230、 第一合成器 240、 第一数模转换器 250和上变频电路 260, 其与图 1的数字接口电路 110、 数字调制电路 120、 第一频率搬移电路 130、 第一合成器 140、 第一数模转换器 150和上变频电路 160类似, 在此不再赘 述。
图 2的发射电路 200还包括: 第二合成器 270和第二数模转换器 280。 第二合成器 270将经过频率搬移后的上述 N路第一调制信号中的 L路 第一调制信号合并成第二带宽信号, 其中该 L路第一调制信号与该 M路第 一调制信号不同, 即 L路第一调制信号为 N路第一调制信号中除 M路第一 调制信息之外的信号, L为正整数。第二数模转换器 280接收第二带宽信号, 并且对第二带宽信号进行数模转化获得第二模拟信号, 其中上变频电路 260 用于接收第一模拟信号和第二模拟信号, 并且将第一模拟信号和第二模拟信 号合并成该射频信号。
例如, 第一频率般移电路可以分别使用 N个具有相同间隔的频率对 N 路第一调制信号进行频率搬移,以便经过频率搬移后的 N路第一调制信号的 带宽连续, 即 N路第一调制信号的带宽相邻接。第一频率搬移电路还可以分 别使用 L个具有相同间隔的频率对 L路第一调制信号进行频率搬移,而分别 使用 M个具有相同间隔的频率对 M路第一调制信号进行频率搬移, 在这种 情况下, 第一模拟信号和第二模拟信号可能存在带宽重叠或频率间隔。
可选地, 作为另一实施例, 上变频电路 160还在将第一模拟信号和第二 模拟信号合并成该射频信号之前, 分别对第一模拟信号和第二模拟信号进行 频率搬移。
例如,在第一模拟信号和第二模拟信号存在带宽重叠或者存在频带间隔 的情况下, 可以进一步对第一模拟信号和第二模拟信号进行频率般移, 以便 经过频率搬移后的第一模拟信号和第二模拟信号的带宽连续且没有频率间 隔或重叠。
图 3是根据本发明的第三实施例的一种发射电路 300 的示意性电路框 图。 图 3的实施例的发射电路包括对应于多个天线(例如, 第一天线和第二 天线) 中的每个天线的发射电路, 从而能够支持多天线系统。 第一天线对应 的发射电路与第二天线对应的发射电路中的各个单元的功能相同。
对应于第一天线, 图 3的发射电路 300包括: 数字接口电路 310、 数字 调制电路 320、 第一频率搬移电路 330、 第一合成器 340、 第一数模转换器 350和第一上变频电路 360, 其与图 1 的数字接口电路 110、 数字调制电路 120、 第一频率搬移电路 130、 第一合成器 140、 第一数模转换器 150和上变 频电路 160类似, 在此不再赘述。
根据本发明的实施例, 对应于第二天线, 数字接口电路 310还在该预定 带宽上获得待发送的第二数据,并且将第二数据分解为并行的 N路第二子数 字信号流,其中上述 N路第二子数字信号流中的每个第二子数字信号流占用 的带宽小于该预定带宽,作为一种实施例可以使得 M = N;数字调制电路 320 还接收上述 N路第二子数字信号流, 并且对上述 N路第二子数字信号流进 行调制, 以获得 N路第二调制信号。
对应于第二天线, 图 3的发射电路 300还包括: 第二频率搬移电路 370 第二合成器 380第二数模转换器 390和第二上变频电路 395。
第二频率搬移电路 370接收上述 N路第二调制信号, 并且对上述 N路 第二调制信号进行频率般移,其中经过频率搬移后的上述 N路第二调制信号 中的相邻第二调制信号之间没有频带间隔。第二合成器 380将经过频率搬移 后的上述 N路第二调制信号合并成第二带宽信号。第二数模转换器 390接收 第二带宽信号, 并且对第二带宽信号进行数模转化获得第二模拟信号。 第一 上变频电路 360接收第一模拟信号, 并且将第一模拟信号转换为第一射频信 号, 以便在第一天线上发送第一射频信号。 第二上变频电路 395接收第二模 拟信号, 并且将第二模拟信号转换为第二射频信号, 以便在第二天线上发送 第二射频信号。 根据本发明的实施例, 数字调制电路 320包括 N个调制器, 上述 N个 调制器分别对上述 N个第一子数字信号流进行调制, 并且上述 N个调制器 分别对上述 N个第二子数字信号流进行调制。
例如, 上述调制器可以由 FPGA来实现, 对应于第一天线的第一子数字 信号流和对应于第二天线的第二子数字信号流使用相同的 FPGA 进行数字 调制。 换句话说, 从相同的 FPGA输出的第一调制信号和第二调制信号可以 输出到使用相同的频率进行频率搬移的混频器。 因为每个频域子通道的独立 性, 使得高复杂度的数字处理器件和 FPGA 可以分布于多个不同的 DSP/FPGA片 /板中, 从而使得实现更加容易和灵活。
在 M = N的情况下,对应于第一天线的第一数据或对应于第二天线的第 二数据对应的子数字信号流被合成一个大带宽信号, 并且使用一个 DAC进 行数模转换, 即在发射端,每个天线对应的所有子通道仅使用一个高速 DAC 和一套模拟中频电路, 因此, 并且节省了发射电路的器件和成本。
图 4是根据本发明的第四实施例的一种发射电路 400 的示意性电路框 图。 图 4的实施例的发射电路包括对应于多极化 (例如, H极和 V极化)的 发射电路, 从而能够支持多极化天线系统。
图 4的发射电路 400包括: 数字接口电路 410、 数字调制电路 420、 第 一频率搬移电路 430、 第一合成器 440、 第一数模转换器 450和第一上变频 电路 460, 其与图 1的数字接口电路 110、数字调制电路 120、 第一频率搬移 电路 130、 第一合成器 140、 第一数模转换器 150和上变频电路 160类似, 在此不再赘述。
发射电路 400的发射天线为双极化天线,数字调制电路 420在 H极化上 对上述 N路第一子数字信号流进行调制, 并且优选 M = N。
数字接口电路 410还在该预定带宽上获得待发送的第二数据, 并且将第 二数据分解为并行的 K路第二子数字信号流, 上述 K路第二子数字信号流 中的每个第二子数字信号流占用的带宽小于该预定带宽, K为正整数。
数字调制电路 420还接收上述 K路第二子数字信号流, 并且在 V极化 上对上述 K路第二子数字信号流进行调制, 以获得 K路第二调制信号。
发射电路 300还包括: 第二数字调制电路 425、 第二频率搬移电路 470、 第二合成器 480、 第二数模转换器 490、 第二数模转换器 490、 第二上变频电 路 495和耦合器 465。 第二数字调制电路 425接收上述 K路第二子数字信号流, 并且在 V极 化上对上述 K路第二子数字信号流进行调制, 以获得 K路第二调制信号; 第二频率搬移电路 470接收上述 K路第二调制信号, 并且对上述 K路第二 调制信号进行频率搬移,其中经过频率搬移后的该 K路第二调制信号中的相 邻第二调制信号之间没有频带间隔; 第二合成器将经过频率搬移后的上述 K 路第二调制信号合并成第二带宽信号; 第二数模转换器 490接收第二带宽信 号, 并且对第二带宽信号进行数模转化获得第二模拟信号; 其中第一上变频 电路 460, 接收第一模拟信号, 并且将第一模拟信号转换为第一射频信号。 第二上变频电路 495 , 接收第二模拟信号, 并且将第二模拟信号转换为第二 射频信号。 耦合器 465将第一射频信号和第二射频信号进行耦合, 以便在该 双极化天线上发送第一射频信号和第二射频信号。
根据本发明的实施例, 数字调制电路 420包括 N+K个调制器, 其中上 述 N个该调制器分别对上述 N个第一子数字信号流进行调制, 该 K个调制 器分别对该 K个第二子数字信号流进行调制, 其中 N可以等于 K。
图 5是根据本发明的第五实施例的一种收发机 500的示意性电路框图。 收发机 500包括: 接收电路和发射电路。 图 5的发射电路可以包括: 数字接 口电路 510、 数字调制电路 520、 第一频率搬移电路 530、 第一合成器 540、 第一数模转换器 550和上变频电路 560, 其与图 1的数字接口电路 110、 数 字调制电路 120、 第一频率搬移电路 130、 第一合成器 140、 第一数模转换器 150和上变频电路 160类似, 在此不再赘述。
上述接收机电路可以包括: 下变频电路 595、 中频功率分配器 590、 第 二频率搬移电路 580和 Ν个模数转换器 570。
下变频电路 595将在接收天线上接收的射频信号转换为模拟信号。 中频 功率分配器 590将该模拟信号分解为 Ν个并行的子模拟信号流。第二频率搬 移电路 580将上述 Ν个并行的子模拟信号流进行频率搬移。 Ν个模数转换器 570对上述 Ν个并行的子模拟信号流分别进行模数转换获得 Ν个并行的数字 信号流。数字解调电路 525对上述 Ν个并行数字信号流进行解调处理,获得 Ν个并行的解调信号。数字接口电路 510将上述 Ν个并行的解调信号合成第 二数据。
根据本发明的实施例可以将数据分解为并行的多路子数字信号流, 分别 对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使用 一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成射 频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且在发送端 和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需对模拟 信号进行复杂的后处理, 能够降低收发机信号处理的复杂度, 从而提高了系 统性能。
根据本发明的实施例, 可以在接收端通过频域子通道采样的方式, 降低 了对 ADC的要求, 并且在发射端, 通过数字域的子通道划分, 使得接收端 可以对每个独立的频域子通道进行处理。 一方面, 每个频域子通道可以独立 传输数据, 从而提高了系统的灵活性。 另一方面, 因为每个频域子通道的独 立性, 使得高复杂度的数字处理器件和 FPGA 可以分布于多个不同的 DSP/FPGA片 /板中, 同时只使用一个高速 DAC和一套模拟发射中频电路, 节省了相关的器件和成本。
图 6是根据本发明的第六实施例的一种通信系统 600 的示意性电路框 图。 通信系统 600包括发射机和接收机。
图 6的发射机包括图 1、 图 2、 图 3或图 4的发射电路。 该发射电路包 括: 数字接口电路 610、 数字调制电路 620、 第一频率搬移电路 630、 第一合 成器 540、 第一数模转换器 650和上变频电路 660, 其与图 1的数字接口电 路 110、 数字调制电路 120、 第一频率搬移电路 130、 第一合成器 140、 第一 数模转换器 150和上变频电路 160类似, 在此不再赘述。
该接收机包括: 下变频电路 665、 中频功率分配器 655、 第二频率 移 电路 645、 Q个模数转换器 635、 数字解调电路 625和数字接口电路 615。
下变频电路 665将在接收天线上接收的该射频信号转换为模拟信号。 中 频功率分配器 655将该模拟信号分解为 Q个并行的子模拟信号流。第二频率 搬移电路 645将所述 Q个并行的子模拟信号流进行频率搬移。 Q个模数转换 器 635对上述 Q个并行的子模拟信号流分别进行模数转换获得 Q个并行的 数字信号流。 数字解调电路 625对上述 Q个并行数字信号流进行解调处理, 获得 Q个并行的解调信号。 数字接口电路 615将上述 Q个并行的解调信号 合成第一数据, 其中在应用中, Q可以等于N。
根据本发明的实施例可以将数据分解为并行的多路子数字信号流, 分别 对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使用 一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成射 频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且在发送端 和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需对模拟 信号进行复杂的后处理, 能够降低收发机信号处理的复杂度, 从而提高了系 统性能。
根据本发明的实施例, 可以在接收端通过频域子通道采样的方式, 降低 了对 ADC的要求, 并且在发射端, 通过数字域的子通道划分, 使得接收端 可以对每个独立的频域子通道进行处理。 一方面, 每个频域子通道可以独立 传输数据, 从而提高了系统的灵活性。 另一方面, 因为每个频域子通道的独 立性, 使得高复杂度的数字处理器件和 FPGA 可以分布于多个不同的 DSP/FPGA片 /板中, 同时只使用一个高速 DAC和一套模拟发射中频电路, 节省了相关的器件和成本。
下面结合具体例子, 更加详细地描述本发明的实施例。 图 10是根据本 发明的第十实施例的一种收发机的电路图。 图 12是根据本发明的实施例的 合成器的电路框图。 图 10的收发机是图 5的收发机的例子。
参见图 10, 收发机的发射电路包括一个 DAC, 而收发机的接收电路包 括 N个 ADC,即 ADC的数目为 DAC的数目的 N倍。收发机可分为三部分: 数字调制解调部分、 模拟中频部分和模拟射频部分, 这里模拟中频部分和模 拟射频部分, 下面详细描述收发机的工作原理。
参见图 10, 在发射端, 数字接口电路 1001在预定带宽 (例如 5GHz ) 上获得数据并且将该数据分解为并行的 N路子数字信号流,每个子数字信号 流占用的带宽小于该预定带宽。 例如, 如果将总带宽为 5GHz的数据分解为 4路数字信号流(即 4个子通道), 则每路子数字信号流的带宽为 1.25GHz。 举例来说, 一个 4比特的数据可以被分成 4个 1比特, 或者两个 2bit的数据 可以被分成 4个 1比特, 分别在 4个子通道中传输。
由 N个(例如, 4个)现场可编程门阵列 (FPGA ) 1002-1005组成的 数字调制电路接收上述 N路子数字信号流, 并且对上述 N路子数字信号流 进行调制, 以获得 N路调制信号, 其中 N个 FPGA 1002-1005与 N路子数 字信号流——对应。 根据本发明的实施例也可以采用专用集成电路 ( Application Specific Integrated Circuit, ASIC )等实现数字调制电路。
数据调制电路的工作原理如下: N个子数字信号流分别由 N个 FPGA
1002-1005独自进行处理。 每个 FPGA的功能相同, 各个子通道的 FPGA处 理主要(采用单载波或多载波调制方式)完成对数字信号的调制。 其中, 对 子数字信号流的调制包括并不限于信道编码、 符号映射调制、 OFDM调制、 脉沖成形、 采样率转换、 预加重、 预均衡、 峰均比抑制等。 每个 FPGA可以 包括: 编码模块, 用于对输入子数字信号流进行编码, 例如, 低密度奇偶校 验(Low-density Parity-check, LDPC )编码; 星座点映射模块, 用于将输入 的子数字信号流映射到对应的星座点,例如, 64相正交振幅调制(Quadrature Amplitude Modulation , QAM ); 快速傅立叶反变换 ( Inverse Fast Fourier Transform, IFFT )模块, 用于对输入的子数字信号流进行傅里叶反变换, 以 将频域信号转换成时域信号; 加窗模块, 用于对输入的时域信号同时或者单 独加时域窗和频域窗; 成帧模块, 用于在信号中插入前导序列等, 以完成组 帧功能; 采样率变换模块, 用于将采样率转变到 DAC的采样率。通过 FPGA 数字调制后, 每个 FPGA输出的调制信号的中心频点在 1.2GHz, 有用信号 占用的带宽为 0.5750GHz-1.8250GHz。
由 N个混频器 1006~1009以及 N个本地振荡器 fi~fN组成的频率般移电 路接收上述 N路调制信号, 并且对上述 N路调制信号进行混频和频率搬移。 例如, 假设 N = 4, 如果每个 FPGA输出的调制信号的中心频点在 1.2GHz, 并且本地振荡器的频率选择 f^OGHz, f2= 1.25GHz, f3=2.5GHz, f4=3.75GHz, 则经过频率搬移后, 混频器 1006~1009输出的调制信号的中心频点分别变为 1.2GHz 、 1.45GHz 、 3.6GHz 和 4.95GHz , 总共 占 用 的 频带 为 0.5750GHz-5.5750GHz, 并且相邻调制信号之间没有频带间隔。
合成器 1010将经过频率搬移后的上述 N路调制信号合并成大带宽信号。 参见图 12, 合成器 1010可以包括加法器 1210和 SINC函数 1220。 合成器 1010将数据流 1至数据流 N (经过频率搬移后的 N路调制信号)相加。 例 如, 4叚设 N = 4, 选择 ffOGHz, f2=l.25GHz, f3=2.5GHz, f4=3.75GHz, 将 4 个子带的拼接成 5GHz的大带宽信号, 也就是 0.5750GHz-5.5750GHz。 SINC 函数 1220 用于对合成的大带宽信号进行补偿, 并将补偿后的信号输出到 DAC 1011。
DAC 1011从合成器 1010接收大带宽信号,并且对该大带宽信号进行数 模转化获得模拟信号, 并且将输出的模拟信号输出到上变频电路。
上变频电路接收 DAC 1011输出的模拟信号, 并且将该模拟信号转换为 射频信号, 以便在天线上发送该射频信号, 上变频电路可以包括模拟中频部 分的上变频和模拟射频部分的上变频。 具体而言, 在模拟中频部分中, DAC 1011输出的模拟信号经过混频器 1012和本地振荡器 进行模拟中频调制 (即第一次上变频), 然后经过带通滤波器(Band Pass Filter, BPF ) 1013进 行滤波, 再经过放大器 1014进行放大, 最后将放大后的模拟信号输出到模 拟射频部分。 在模拟射频部分中, 从模拟中频部分输出的模拟信号经过混频 器 1015和本地振荡器 f 进行上变频(第二次上变频 ), 经过放大器 1016进 行放大, 然后经过 BPF 1017进行滤波, 再经过放大器 1018进行放大后, 最 后经过双工器 1019送入到天线 1020进行发射。
在接收端, 天线 1020接收来自对端收发机发射的射频信号, 该射频信 号经过双工器 1019进入收发机的接收电路, 然后经过 BPF 1049进行滤波, 再经过放大器 1048进行射频放大, 最后经过混频器 1047和本地振荡器 f 进行下变频, 得到模拟中频信号。
模拟中频信号经过中频功率分配器 1046, 得到分别在 N个子信道中传 输的 N个相同频点的并行子模拟信号流。每个子模拟信号流经过各自的放大 器 1042~1045进行放大, 然后经过 BPF 1038-1041进行滤波, 再经过混频器 1034-1037和本地振荡器 ,~ΐΝ,进行频率 移(中频下变频),将其般移到期 望的频率上, 最后经过 BPF 1030~1033进行滤波。 经过各个中频处理后的各 个子模拟信号的频点相同, 也就是与发送端 FPGA输出信号的频点相同。
经过中频处理后的多个并行子数据流经过各自的 ADC进行采样得到各 个子通道的子数字信号流(即离散采样信号), 并输出到由 N个 FPGA组成 的数字解调电路进行解调处理。
数字解调电路的工作原理如下: 各个子通道的子数字信号流经过各自的 FPGA处理, 得到各个子数字信号流对应的发送比特判决信号。 各个子通道 的 FPGA处理主要完成对数字信号的解调, 包括单载波或多载波调制方式。 其中,对数字信号的解调包括并不局限于信道估计、编码解调、采样率转换, 同步, 均衡等。 每个 FPGA可以包括: 采样率变换模块, 用于将 ADC采样 率变换到符号率的采样率; 自动增益控制模块, 用于通过对输入的信号功率 进行估计, 并调整模拟器件的增益; 帧同步模块, 用于完成帧同步功能; 频 偏估计与补偿模块, 用于对载波频偏和采样频率频偏进行估计和补偿; FFT 模块,用于将时域信号转换成频域信号;信道估计模块,用于完成信道估计, 从而对信号实现相干检测; 残余频偏估计与补偿模块, 用于对残留的载波频 偏和采样频率频偏进行估计和补偿; 相噪消除模块, 用于对射频器件引入的 相位噪声进行消除; 解码模块, 用于完成数据的解码。
经过 FPGA 处理的多个子通道的发送比特判决信号经过数字接口电路 1001 , 合成得到一个高速的接收判决信号。
根据本发明的实施例, 可以在接收端通过频域子通道采样的方式, 降低 了对 ADC的要求, 并且在发射端, 通过数字域的子通道划分, 使得接收端 可以对每个独立的频域子通道进行处理。 一方面, 每个频域子通道可以独立 传输数据, 从而提高了系统的灵活性。 另一方面, 因为每个频域子通道的独 立性, 使得高复杂度的数字处理器件和 FPGA 可以分布于多个不同的 DSP/FPGA片 /板中, 同时只使用一个高速 DAC和一套模拟发射中频电路, 节省了相关的器件和成本。
图 11是根据本发明的第十一实施例的一种收发机的电路图。 图 11的收 发机中的发射电路是图 2的实施例的例子。
与图 10 的实施例不同的是, 图 11 收发机的发射电路可以包括 M 个 DAC, 而接收电路的 ADC的数目为 N*M, 即 ADC的数目为 DAC的数目 的 N倍。
参见图 11 , 在发射端, 数字接口电路 1101在预定带宽 (例如, 5GHz ) 上获得数据并且将该数据分解为并行的 M*N路子数字信号流, 每个子数字 信号流占用的带宽小于该预定带宽。 例如, 如果将总带宽为 5GHz的数据分 解为 2*N路子数字信号流(即 2*N个子通道 ), 则每路子数字信号流的带宽 为 5/(2*N)GHz。
由 2*N个 FPGA 1102-1105组成的数字调制电路接收 2*N路子数字信号 流, 并且对上述 2*N路子数字信号流进行调制, 以获得 2*N路调制信号, 其中 2*N个 FPGA 1102-1105与 2*N路子数字信号流——对应。每个 FPGA 输出的调制信号的中心频点在 1.2GHz ( iFli N = 2 ), 有用信号占用的带宽 为 0.5750GHz- 1.8250GHz。
由 N个混频器 1106~1107以及频率为 ~ 的 N个本地振荡器 fi~fN组成 的频率搬移电路接收 N个 FPGA 1102-1103输出的 N路调制信号,并且对上 述 N路调制信号进行混频和频率般移。 由另外 N个混频器 1108~1109以及 频率为 ~fN的 N 个本地振荡器组成的频率 移电路接收 N 个 FPGA 1104-1105输出的 N路调制信号,并且对上述 N路调制信号进行混频和频率 搬移。 例如, 假设 N = 2, 如果每个 FPGA输出的调制信号的中心频点在 1.2GHz, 并且本地振荡器的频率选择 ffOGHz, f2=1.25GHz, 则经过频率般 移后, 混频器 1106~1109输出的调制信号的中心频点分别变为 1.2GHz、 2.45GHz、 1.2GHz和 2.45GHz。
合成器 1110将经过 N个混频器 1006~1007进行频率搬移后的 N路调制 信号合并成大带宽信号。 合成器 1111将经过 N个混频器 1008~1009进行频 率搬移后的 N 路调制信号合并成大带宽信号。 例如, 假设 N = 2, 选择 f^OGHz, f2=1.25GHz, 合成器 1110和合成器 1111各自将 2个子带拼接成 2.5GHz的大带宽信号,也就是 0.5750GHz-3.0750GHz,并且相邻调制信号之 间没有频带间隔。
DAC 1111和 DAC 1112分别从合成器 1110和合成器 1111接收两个大带 宽信号, 对这两个大带宽信号进行数模转化获得模拟信号, 并且将输出的模 拟信号输出到上变频电路。
上变频电路接收 DAC 1111和 DAC 1112输出的模拟信号, 并且将模拟 信号转换为射频信号, 以便在天线上发送该射频信号。 具体而言, 在模拟中 频部分中, DAC 1111和 DAC1112输出的模拟信号分别经过 BPF 1113和 BPF 1114进行滤波,经过混频器 1115和本地振荡器 &以及混频器 1116和本地振 荡器 gm进行中频上变频和频率般移, 然后经过 BPF 1117和 BPF 1118进行 滤波, 再经过放大器 1119和放大器 1120进行放大, 最后利用中频功率合成 器 1116将放大器 1119和放大器 1120输出的和放大的两个模拟信号进行合 成处理后输出到模拟射频部分, 其中
Figure imgf000018_0001
gm之间的差为 2.5GHz, 以便中频 功率合成器 1116 将两个模拟信号的拼接成 5GHz 的大带宽信号, 即 0.5750GHz-5.5750GHz。 图 11的模拟射频部分包括混频器 1121、本地振荡器 fc、 放大器 1122、 BPF 1123和放大器 1124, 与图 10的模拟射频部分的各个 单元类似, 在此不再赘述。 最后, 模拟射频部分的输出经过双工器 1125送 入到天线 1126进行发射。
图 11的收发机中的接收电路的放大器 1127、混频器 1128和本地振荡器 fc、中频功率分配器 1129、放大器 1130-1133, BPF 1134-1137, BPF 1142-1145, ADC 1146~1149和 FPGA 1150~1153的功能与图 10的接收电路的各个单元类 似, 在此不再赘述。 图 11的接收电路与图 10的接收电路不同的是, 混频器 1138~1139和频率为 +&的本地振荡器对 BPF 1134~1135的输出进行频率搬 移, 而混频器 1140~1141和频率为 fm+gm的本地振荡器对 BPF 1136-1137的 输出进行频率搬移。
图 7A和图 7B分别是根据本发明的第七实施例的一种发射电路和接收 电路的电路图。 图 7 A和图 7B的发射电路和接收电路是图 4的实施例的例 子。
图 7A的实施例的发射电路在 H极化和 V极化分别对大带宽信号进行调 制得到 H极化信号和 V极化信号, 然后通过双极化天线分别将 H和 V极化 信号发送出去, 图 7B的接收电路从双极化天线接收并解调出 H极化信号和 V极化信号。
发射电路的天线 720和接收电路的天线 770为双极化天线,数字调制电 路分别在 H极化和 V极化上对 N路子数字信号流进行调制。 图 7A的实施 例包括两个 DAC 711和 DAC 731 , 分别对应于 H极化和 V极化。
参见图 7A, 在发射端, 对应于 H极化, 数字接口电路 701分别在预定 带宽 (例如, 5GHz )上获得数据并且将该数据分解为并行的 N路子数字信 号流。 同样, 对应于 DAC 731 , 数字接口电路 701可以得到 N路子数字信 号流。
与 H极化对应的发射电路包括: N个 FPGA 702-705、 N个混频器 706~709 和频率为 ~^的本地振荡器、合成器 710、 DAC 711、 BPF 713、放大器 714、 混频器 715和频率为 f 的本地振荡器、 放大器 716、 BPF 717以及放大器 718, 这些单元的功能与图 10的发射电路对应单元类似, 在此不再赘述。 与 V极化对应的发射电路包括: N个 FPGA 722-725, N个混频器 726~729和 频率为 ~fN的本地振荡器、 合成器 730、 DAC 731、 BPF 733, 放大器 734、 混频器 735和频率为 ½的本地振荡器、 放大器 736、 BPF 737以及放大器 738, 同样, 这些单元与图 10的发射电路的对应单元类似, 在此不再赘述。 与图 10的发射电路不同的是, 放大器 718和放大器 738分别将 H极化信号 和 V极化信号发送给耦合器( OMT ) 719, 耦合器 719将 H极化信号和 V 极化信号转换为双极化信号输出给双极化 720天线。
参见图 7B, 在接收端, 耦合器 769将从双极化天线 770接收到的双极 化信号转换成 H极化信号和 V极化信号。
与 H极化对应的接收电路包括: BPF 768、 放大器 767、 混频器 766和 本地振荡器 fRF、 中频功率分配器 765、 放大器 761~764、 BPF 757~760、 混 频器 753~756和频率为 ,~ΐΝ,的本地振荡器 BPF 749-752, ADC 745-748和 FPGA 741-744, 这些单元与图 10的接收电路的各个单元类似, 在此不再赘 述。 与 V极化对应的接收电路包括: BPF 798、 放大器 797、 混频器 796和 本地振荡器 fRF、 中频功率分配器 785、 放大器 791~794、 BPF 787~790、 混 频器 783~786和频率为 ,~ΐΝ,的本地振荡器、 BPF 779-782, ADC 775-778 和 FPGA 771~774, 这些单元与图 10的接收电路的各个单元类似, 在此不再 赘述。 与图 10的接收电路不同的是, 耦合器 769接收双极化天线 770接收 的双极化信号, 将双极化信号转换成 H极化信号和 V极化信号, 并且分别 输出给放大器 768和放大器 798。
图 8A和图 8B分别是根据本发明的第八实施例的一种发射电路和接收 电路的电路图。 图 8 A和图 8B的发射电路和接收电路是图 3的实施例的例 子。
图 8A实施例的发射电路对应于多个天线 1~天线 M, 图 8B的接收电路 对应于多个天线 1~天线 N。
在发射端, 对应于每根天线, 分别对大带宽信号进行调制, 然后通过每 根天线发送出去。 在接收端, 对应于每根天线, 对多路信号进行相应的接收 和解调。
参见图 8A, 在发射端, 对应于每根天线, 数字接口电路 701分别在预 定带宽 (例如, 5GHz )上获得数据并且将该数据分解为并行的 N路子数字 信号流。
对应于天线 1 ,发射电路包括: N个 FPGA 802~805、 N个混频器 806~809 和频率为 fi~fN的本地振荡器、 合成器 810、 D AC 811 , 混频器 812和频率为 fIF的本地振荡器、 BPF 813、 放大器 814、 混频器 815和频率为 的本地振 荡器、 放大器 816、 BPF 817以及放大器 818, 这些单元的功能与图 10的发 射电路对应单元类似, 在此不再赘述。 对应于天线 M, 发射电路包括: N个 FPGA 802-805 , N个混频器 826~829和频率为 f^fN的本地振荡器、 合成器 830、 DAC 831、 混频器 832和频率为 fIF的本地振荡器、 BPF 833、 放大器 834、 混频器 835和频率为 fRF的本地振荡器、 放大器 836、 BPF 837以及放 大器 838,这些单元的功能与图 10的发射电路对应单元类似,在此不再赘述。 与图 10的发射电路不同的是, 放大器 818和放大器 838分别输出射频信号 给天线 1和天线 M。 由上可见, 对应于天线 1 的发射电路的子数字信号流与对应于天线 M 的发射电路的子数字信号流采用相同的 FPGA进行数字调制。 例如, FPGA 802输出的两路调制信号分别输出到混频器 806和混频器 826,混频器 FPGA 803输出的两路调制信号分别输出到混频器 807和混频器 827, 等等。
参见图 8B, 在接收端, 对应于天线 1的接收电路包括: BPF 868、 放大 器 867、混频器 866和本地振荡器 fRp、中频功率分配器 865、放大器 861~764、 BPF 857-760, 混频器 853~856和频率为 ,~ΐΝ,的本地振荡器 BPF 849-752, ADC 845-848和 FPGA 841~844,这些单元与图 10的接收电路的各个单元类 似, 在此不再赘述。 对应于天线 N的接收电路包括: BPF 898、 放大器 897、 混频器 896和本地振荡器 fRp、 中频功率分配器 895、 放大器 891~894、 BPF 897-890,混频器 883~886和频率为 ,~ΐΝ,的本地振荡器 BPF 879-882, ADC 875-878和 FPGA 841~844, 这些单元与图 10的接收电路的各个单元类似, 在此不再赘述。 与图 10的接收电路不同的是, 放大器 868和放大器 898分 别从天线 1和天线 N接收射频信号。
由上可见,对应于天线 1的接收电路的子数字信号流与对应于天线 N的 接收电路的子数字信号流采用相同的 FPGA进行数字解调。 例如, ADC 845 和 ADC875均输出数字信号给 FPGA 841进行数字解调, ADC 846和 ADC 876均输出数字信号给 FPGA 842进行数字解调, 等等。
图 9A和图 9B分别是根据本发明的第九实施例的一种发射电路和接收 电路的电路图。 图 9A的发射电路和接收电路是图 3和图 4结合的例子。
图 9A的实施例包括分别对应于多根双极化天线 1~双极化天线 M的发 射电路,图 9B的实施例包括分别对应于多根双极化天线 1~双极化天线 N的 接收电路, 并且每根双极化天线对应的发射电路在 H极化和 V极化分别对 大带宽信号进行调制得到 H极化信号和 V极化信号, 然后通过双极化天线 分别将 H和 V极化信号发送出去, 每根双极化天线对应的接收电路从双极 化天线接收并解调出 H极化信号和 V极化信号。
在发射端,双极化天线 1对应的发射电路包括: 与 H极化对应的发射电 路和与 V极化对应的发射电路。 与 H极化对应的发射电路包括: N个 FPGA 902-905, N个混频器 906~909和频率为 fi~fN的本地振荡器、 合成器 910、 DAC 911、 混频器 912和本地振荡器 fip、 BPF 913、 放大器 914、 混频器 915 和频率为 fRp的本地振荡器、放大器 916、 BPF 917和放大器 918,放大器 918 连接到耦合器 919,耦合器 919连接到天线 920,这些单元的功能与图 7A的 发射电路对应单元类似, 在此不再赘述。 与 V极化对应的发射电路包括: N 个 FPGA 902' -905 \ N个混频器 926~929和频率为 ~ 的本地振荡器、 合 成器 930、 DAC 931、 混频器 932和本地振荡器 f1F、 BPF 933、 放大器 934、 混频器 935和频率为 f 的本地振荡器、放大器 936、 BPF 937和放大器 938, 放大器 938连接到耦合器 919, 耦合器 919连接到天线 920, 这些单元与图 7B的发射电路的对应单元类似, 在此不再赘述。
在发射端, 双极化天线 M对应的发射电路包括: 与 H极化对应的发射 电路和与 V极化对应的发射电路。与 H极化对应的发射电路包括: N个 FPGA 902-905 , N个混频器 906,~909,和频率为 f^fN的本地振荡器、 合成器 910,、 DAC 911,、 混频器 912,和本地振荡器 、 BPF 913,、 放大器 914,、 混频器 915,和频率为 fRp的本地振荡器、 放大器 916,、 BPF 917,以及放大器 918,, 放大器 918,连接到耦合器 919,, 耦合器 919,连接到天线 920,, 这些单元的 功能与图 7A的发射电路对应单元类似, 在此不再赘述。 与 V极化对应的发 射电路包括: N个 FPGA 902,~905,、 N个混频器 926,~929,和频率为 f fN的 本地振荡器、合成器 930、 DAC 931、混频器 932,和本地振荡器 、 BPF 933,、 放大器 934,、混频器 935,和频率为 fRp的本地振荡器、放大器 936,、 BPF 937' 以及放大器 938,, 放大器 938,连接到耦合器 919,, 耦合器 919,连接到天线 920' , 这些单元与图 7B的发射电路的对应单元类似, 在此不再赘述。
在接收端,双极化天线 1对应的接收电路包括: 与 H极化对应的接收电 路和与 V极化对应的接收电路。 与 H极化对应的接收电路包括: BPF 968、 放大器 967、 混频器 966和本地振荡器 fRp、 中频功率分配器 965、 放大器 961-964, BPF 957-960, 混频器 953~956和频率为 ,~ΐΝ,的本地振荡器 BPF 949-952, ADC 945-948和 FPGA 941~944, 这些单元与图 7A的接收电路的 各个单元类似, 在此不再赘述。 与 V极化对应的接收电路包括: BPF 998、 放大器 997、 混频器 996和本地振荡器 ½、 中频功率分配器 995、 放大器 991-994, BPF 987-990,混频器 983~986和频率为 ,~ΐΝ,的本地振荡器、 BPF 979-982, ADC 975-978和 FPGA 941 ' -944' , 这些单元与图 7B的接收电路 的各个单元类似, 在此不再赘述。
在接收端, 双极化天线 N对应的接收电路包括: 与 H极化对应的接收 电路和与 V极化对应的接收电路。与 H极化对应的接收电路包括: BPF 968'、 放大器 967,、 混频器 966,和本地振荡器 fRp、 中频功率分配器 965,、 放大器 961-964 \ BPF 957,~960,、 混频器 953,~956,和频率为 ,~ΐΝ,的本地振荡器 BPF 949,~952,、 ADC 945,~948,和 FPGA 941 ' -944' , 这些单元与图 7Β的接 收电路的各个单元类似, 在此不再赘述。 与 V极化对应的接收电路包括: BPF 998,、放大器 997,、混频器 996,和本地振荡器 fRp、中频功率分配器 995,、 放大器 991,~994,、 BPF 987,~990,、 混频器 983,~986,和频率为 ,~ΐΝ,的本地 振荡器、 BPF 979,~982,、 ADC 975,~978,和 FPGA 941~944, 这些单元与图 7Β的接收电路的各个单元类似, 在此不再赘述。
上面描述了根据本发明实施例的发射电路、 收发机和通信系统, 下面分 别结合图 13至图 15描述根据本发明实施例的发射数据的方法和传输数据的 方法。
图 13是根据本发明的第十二实施例的一种发射数据的方法的示意性流 程图。 该发射数据的方法包括如下内容。
1310, 在预定带宽上获得待发送的第一数据, 并且将第一数据分解为并 行的 Ν路第一子数字信号流, 上述 Ν路第一子数字信号流中的每个第一子 数字信号流占用的带宽小于该预定带宽, Ν为正整数。
1320, 对上述 Ν路第一子数字信号流进行调制, 以获得 Ν路第一调制 信号。
1330,对上述 Ν路第一调制信号进行频率搬移,其中经过频率搬移后的 上述 Ν路第一调制信号中的相邻第一调制信号之间没有频带间隔。
1340, 将经过频率搬移后的上述 Ν路第一调制信号中的 Μ路第一调制 信号合并成第一带宽信号, Μ为正整数。
1350, 对第一带宽信号进行数模转化获得第一模拟信号。
1360,将第一模拟信号转换为射频信号,以便在天线上发送该射频信号。 根据本发明的实施例可以将数据分解为并行的多路子数字信号流, 分别 对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使用 一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成射 频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且在发送端 和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需对模拟 信号进行复杂的后处理, 能够降低收发机信号处理的复杂度, 从而提高了系 统性能。 可选地, 作为另一实施例, 图 13的方法还包括: 将经过频率般移后的 上述 N路第一调制信号中的 L路第一调制信号合并成第二带宽信号, 其中 该 L路第一调制信号与该 M路第一调制信号不同; 对第二带宽信号进行数 模转化获得第二模拟信号, 其中在 1360 中, 可以将第一模拟信号和第二模 拟信号合并成该射频信号。
可选地, 作为另一实施例, 图 13的方法还包括: 在将第一模拟信号和 第二模拟信号合并成该射频信号之前, 分别对第一模拟信号和第二模拟信号 进行频率搬移。
可选地, 作为另一实施例, 图 13的方法还包括: 在该预定带宽上获得 待发送的第二数据, 并且将第二数据分解为并行的 N路第二子数字信号流, 其中上述 N路第二子数字信号流中的每个第二子数字信号流占用的带宽小 于该预定带宽, 其中 M = N; 对上述 N路第二子数字信号流进行调制, 以获 得 N路第二调制信号, 对上述 N路第二调制信号进行频率搬移, 其中经过 频率搬移后的上述 N路第二调制信号中的相邻第二调制信号之间没有频带 间隔; 将经过频率搬移后的上述 N路第二调制信号合并成第二带宽信号; 对 第二带宽信号进行数模转化获得第二模拟信号; 其中在 1360 中, 将第一模 拟信号转换为第一射频信号, 以便在第一天线上发送第一射频信号, 并且将 第二模拟信号转换为第二射频信号, 以便在第二天线上发送第二射频信号。
在 1320中, 可以采用 N个调制器分别对上述 N个第一子数字信号流进 行调制, 并且采用上述 N个调制器分别对上述 N个第二子数字信号流进行 调制。
根据本发明的实施例, 该天线为双极化天线, 在 1320中, 可以在 H极 化上对上述 N路第一子数字信号流进行调制, 其中 M = N, 其中图 13的方 法还包括: 在该预定带宽上获得待发送的第二数据, 并且将第二数据分解为 并行的 K路第二子数字信号流, 该 K路第二子数字信号流中的每个第二子 数字信号流占用的带宽小于该预定带宽, 其中 K为正整数; 在 V极化上对 该 K路第二子数字信号流进行调制, 以获得 K路第二调制信号; 对该 K路 第二调制信号进行频率般移,其中经过频率般移后的该 K路第二调制信号中 的相邻第二调制信号之间没有频带间隔;将经过频率搬移后的该 K路第二调 制信号合并成第二带宽信号; 对第二带宽信号进行数模转化获得第二模拟信 号; 其中在 1360 中, 可以将第一模拟信号转换为第一射频信号, 接收第二 模拟信号, 并且将第二模拟信号转换为第二射频信号, 并且将第一射频信号 和第二射频信号进行耦合, 以便在该双极化天线上发送第一射频信号和第二 射频信号。
在 1320中, 可以采用 N个调制器分别对上述 N个第一子数字信号流进 行调制, 并且采用 K个调制器分别对该 K个第二子数字信号流进行调制。
在 1340中, 可以采用加法器将经过频率般移的上述 N个第一调制信号 相加, 以合并成第一宽带信号。
根据本发明的实施例, N至少为 4, 第一数据为至少一个二进制数字信 号流。
图 14是根据本发明的第十三实施例的一种传输数据的方法的示意性流 程图。
图 14的传输数据的方法包括接收数据的方法和图 13该的发射数据的方 法, 其中接收数据的方法包括如下内容。
1410, 将在接收天线上接收的射频信号转换为模拟信号。
1420, 将该模拟信号分解为 Q个并行的子模拟信号流。
1430, 将上述 Q个并行的子模拟信号流进行频率搬移。
1440, 对上述 Q个并行的子模拟信号流分别进行模数转换获得 Q个并 行的数字信号流。
1450, 对上述 Q个并行数字信号流进行解调处理, 获得 Q个并行的解 调信号。
1460, 将上述 Q个并行的解调信号合成第二数据, 其中在应用中 Q可 以等于 N。
根据本发明的实施例可以将数据分解为并行的多路子数字信号流, 分别 对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使用 一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成射 频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且在发送端 和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需对模拟 信号进行复杂的后处理, 能够降低收发机信号处理的复杂度, 从而提高了系 统性能。
图 15是根据本发明的第十四实施例的一种通信方法的示意性流程图。 图 15的通信方法包括接收数据的方法和如图 13该的发射数据的方法, 其中上述接收数据的方法包括如下内容。
1510, 将在接收天线上接收的该射频信号转换为模拟信号。
1520, 将该模拟信号分解为 N个并行的子模拟信号流。
1530, 将上述 N个并行的子模拟信号流进行频率搬移。
1540, 对上述 N个并行的子模拟信号流分别进行模数转换获得 N个并 行的数字信号流。
1550, 对上述 N个并行数字信号流进行解调处理, 获得 N个并行的解 调信号。
1560, 将上述 N个并行的解调信号合成第一数据。
根据本发明的实施例可以将数据分解为并行的多路子数字信号流, 分别 对多路子数字信号流进行调制和频率搬移, 然后合并成大带宽信号, 再使用 一个数模转换器将该大带宽信号转换成模拟信号, 最后经过上变频转换成射 频信号。 由于本发明的实施例可以将大带宽划分成多个子带, 并且在发送端 和接收端独立对多路子数字信号流进行处理, 因而在数模转换后无需对模拟 信号进行复杂的后处理, 能够降低收发机信号处理的复杂度, 从而提高了系 统性能。
与现有的通过频域方法或时域方法来提高 DAC/ADC处理速度的技术方 案相比, 本发明的实施例在对信号处理时复杂度小, 信号不容易失真, 不存 在对多个 DAC/ADC的联合控制。 与现有降低信号带宽的技术方案相比, 本 发明降低了 DAC数目, 以及对发送端的模拟中射频处理器件需求。 与现有 的频域多通道技术相比, 不需要在每个通道之间保留保护带。 另一方面, 可 以对频带自由的划分, 不受限制、 系统各扩展性强。 另外, 本发明的实施例 提供了完整的——对应的发送和接收方案,并且支持具备多极化和 /或多天线 的系统。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结 合来实现。 这些功能究竟以硬件还是软件方式来执行, 取决于技术方案的特 定应用和设计约束条件。 专业技术人员可以对每个特定的应用来使用不同方 法来实现所描述的功能, 但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为描述的方便和筒洁, 上述描 述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应 过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间 的耦合或直接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合 或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一 个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使 用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明 的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部 分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质 中, 包括若干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。 而前 述的存储介质包括: U盘、移动硬盘、只读存储器( ROM , Read-Only Memory )、 随机存取存储器(RAM, Random Access Memory ), 磁碟或者光盘等各种可 以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应以权利要求的保护范围为准。

Claims

权利要求
1、 一种发射电路, 其特征在于, 包括;
数字接口电路, 用于在预定带宽上获得待发送的第一数据, 并且将所述 第一数据分解为并行的 N路第一子数字信号流, 所述 N路第一子数字信号 流中的每个第一子数字信号流占用的带宽小于所述预定带宽, N为大于 1的 正整数;
数字调制电路, 用于接收所述 N路第一子数字信号流, 并且对所述 N 路第一子数字信号流进行调制, 以获得 N路第一调制信号;
第一频率搬移电路, 用于接收所述 N路第一调制信号, 并且对所述 N 路第一调制信号进行频率搬移使得经过频率搬移后的所述 N路第一调制信 号中的相邻第一调制信号之间没有频带间隔;
第一合成器, 用于将经过频率搬移后的所述 N路第一调制信号中的 M 路第一调制信号合并成第一带宽信号, 所述 M为小于或等于 N的正整数; 第一数模转换器, 用于接收所述第一带宽信号, 并且对所述第一带宽信 号进行数模转化获得第一模拟信号;
第一上变频电路, 用于接收所述第一模拟信号, 并且将所述第一模拟信 号转换为射频信号, 以便在天线上发送所述射频信号。
2、 根据权利要求 1所述的发射电路, 其特征在于, 还包括:
第二合成器, 用于将经过频率搬移后的所述 N路第一调制信号中的 L 路第一调制信号合并成第二带宽信号,其中所述 L路第一调制信号与所述 M 路第一调制信号不同, 所述 L为正整数, L与 M之和小于或等于 N;
第二数模转换器, 用于接收所述第二带宽信号, 并且对所述第二带宽信 号进行数模转化获得第二模拟信号,
其中所述上变频电路用于接收所述第一模拟信号和所述第二模拟信号, 并且将所述第一模拟信号和所述第二模拟信号合并成所述射频信号。
3、 根据权利要求 2所述的发射电路, 其特征在于, 所述上变频电路还 用于在将所述第一模拟信号和所述第二模拟信号合并成所述射频信号之前, 分别对所述第一模拟信号和所述第二模拟信号进行频率搬移。
4、 根据权利要求 1所述的发射电路, 其特征在于,
所述数字接口电路还用于在所述预定带宽上获得待发送的第二数据, 并 且将所述第二数据分解为并行的 N路第二子数字信号流, 其中所述 N路第 二子数字信号流中的每个第二子数字信号流占用的带宽小于所述预定带宽; 数字调制电路还用于接收所述 N路第二子数字信号流, 并且对所述 N 路第二子数字信号流进行调制, 以获得 N路第二调制信号,
其中所述发射电路还包括:
第二频率搬移电路, 用于接收所述 N路第二调制信号, 并且对所述 N 路第二调制信号进行频率搬移,其中经过频率般移后的所述 N路第二调制信 号中的相邻第二调制信号之间没有频带间隔;
第二合成器,将经过频率搬移后的所述 N路第二调制信号中的 P路信号 合并成第二带宽信号,所述 P为小于或等于 N的正整数;
第二数模转换器, 用于接收所述第二带宽信号, 并且对所述第二带宽信 号进行数模转化获得第二模拟信号;
其中所述第一上变频电路具具体用于接收所述第一模拟信号, 并且将所 述第一模拟信号转换为第一射频信号, 以便在第一天线上发送第一射频信 号;
所述发射电路还包括第二上变频电路,所述第二上变频电路具体用于接 收所述第二模拟信号, 并且将所述第二模拟信号转换为第二射频信号, 以便 在第二天线上发送第二射频信号。
5、 根据权利要求 4的发射电路, 其特征在于, 所述数字调制电路包括 N个调制器, 所述 N个调制器分别对所述 N个第一子数字信号流进行调制, 并且所述 N个调制器还用于分别对所述 N个第二子数字信号流进行调制。
6、 根据权利要求 1的发射电路, 其特征在于, 所述天线为双极化天线, 所述双极化天线包括 H极化与 V极化天线;
所述数字接口电路还用于在所述预定带宽上获得待发送的第二数据, 并 且将所述第二数据分解为并行的 K路第二子数字信号流, 所述 K路第二子 数字信号流中的每个第二子数字信号流占用的带宽小于所述预定带宽, K为 正整数;
其中所述发射电路还包括:
第二数字调制电路, 用于接收所述 K路第二子数字信号流, 并且在 V 极化上对所述 K路第二子数字信号流进行调制,以获得 K路第二调制信号 ,Κ 为大于 1的正整数;
第二频率搬移电路, 用于接收所述 κ路第二调制信号, 并且对所述 Κ 路第二调制信号进行频率搬移,其中经过频率般移后的所述 K路第二调制信 号中的相邻第二调制信号之间没有频带间隔;
第二合成器,将经过频率搬移后的所述 K路第二调制信号中的至少两路 信号合并成第二带宽信号;
第二数模转换器, 用于接收所述第二带宽信号, 并且对所述第二带宽信 号进行数模转化获得第二模拟信号;
其中所述发射电路还包括:
第二上变频电路, 用于接收所述第二模拟信号, 并且将所述第二模拟信 号转换为第二射频信号;
耦合器, 用于将所述第一射频信号和所述第二射频信号进行耦合, 以便 在所述双极化天线上分别发送所述第一射频信号和所述第二射频信号,其中 在 H极化上发送所述第一射频信号 ,V极化上发送所述第二射频信号。
7、 根据权利要求 6的发射电路, 其特征在于, 所述数字调制电路, 所述数字调制电路包括 Ν加 Κ个调制器, 其中 Ν个所述调制器分别对 所述 Ν个第一子数字信号流进行调制, 所述 Κ个调制器分别对所述 Κ个第 二子数字信号流进行调制。
8、 根据权利要求 1至 7所述的发射电路, 其特征在于, 所述第一合成 器包括加法器,所述加法器用于将经过频率般移的所述 Ν个第一调制信号相 加, 以合并成第一宽带信号。
9、 根据权利要求 1至 8 中的任一项所述的发射电路, 其特征在于, Ν 至少为 4, 所述第一数据为至少一个二进制数字信号流。
10、 一种收发机, 其特征在于, 包括: 接收电路和如权利要求 1至 9所 述的发射电路,
其中所述接收机电路, 包括: 下变频电路, 用于将在接收天线上接收的 射频信号转换为模拟信号;
中频功率分配器, 用于将所述模拟信号分解为 Q 个并行的子模拟信号 流;
第二频率搬移电路, 用于将所述 Q 个并行的子模拟信号流进行频率搬 移;
Ν个模数转换器,用于对所述 Q个并行的子模拟信号流分别进行模数转 换获得 Ν个并行的数字信号流; 数字解调电路, 对所述 Q个并行数字信号流进行解调处理, 获得 Q个 并行的解调信号;
数字接口电路, 将所述 Q个并行的解调信号合成第二数据。
11、 一种通信系统, 其特征在于, 所述通信系统包括发射机和接收机, 所述发射机包括如权利要求 1至 9所述的发射电路;
所述接收机, 包括: 下变频电路, 用于将在接收天线上接收的所述射频 信号转换为模拟信号;
中频功率分配器, 用于将所述模拟信号分解为 N 个并行的子模拟信号 流;
第二频率搬移电路, 用于将所述 N 个并行的子模拟信号流进行频率搬 移;
N个模数转换器,用于对所述 N个并行的子模拟信号流分别进行模数转 换获得 N个并行的数字信号流;
数字解调电路, 对所述 N个并行数字信号流进行解调处理, 获得 N个 并行的解调信号;
数字接口电路, 将所述 N个并行的解调信号合成所述第一数据。
12、 一种发射数据的方法, 其特征在于, 包括:
在预定带宽上获得待发送的第一数据, 并且将所述第一数据分解为并行 的 N路第一子数字信号流, 所述 N路第一子数字信号流中的每个第一子数 字信号流占用的带宽小于所述预定带宽, N为大于 1的正整数;
对所述 N路第一子数字信号流进行调制, 以获得 N路第一调制信号; 对所述 N路第一调制信号进行频率搬移,使得经过频率搬移后的所述 N 路第一调制信号中的相邻第一调制信号之间没有频带间隔;
将经过频率搬移后的所述 N路第一调制信号中的 M路第一调制信号合 并成第一带宽信号, M为小于或等于 N的正整数;
对所述第一带宽信号进行数模转化获得第一模拟信号;
将所述第一模拟信号转换为射频信号, 以便在天线上发送所述射频信 号。
13、 根据权利要求 12所述的方法, 其特征在于, 还包括:
将经过频率搬移后的所述 N路第一调制信号中的 L路第一调制信号合 并成第二带宽信号, 其中所述 L路第一调制信号与所述 M路第一调制信号 不同, 所述 L为正整数, L与 M之和小于或等于 N;
对所述第二带宽信号进行数模转化获得第二模拟信号,
所述方法还包括:
将所述第一模拟信号和所述第二模拟信号合并成所述射频信号。
14、 根据权利要求 13所述的方法, 其特征在于, 还包括:
在将所述第一模拟信号和所述第二模拟信号合并成所述射频信号之前, 分别对所述第一模拟信号和所述第二模拟信号进行频率搬移。
15、 根据权利要求 11所述的方法, 其特征在于, 还包括:
在所述预定带宽上获得待发送的第二数据,并且将所述第二数据分解为 并行的 N路第二子数字信号流, 其中所述 N路第二子数字信号流中的每个 第二子数字信号流占用的带宽小于所述预定带宽;
对所述 N路第二子数字信号流进行调制, 以获得 N路第二调制信号, 对所述 N路第二调制信号进行频率搬移,使得经过频率搬移后的所述 N 路第二调制信号中的相邻第二调制信号之间没有频带间隔;
将经过频率搬移后的所述 N路第二调制信号中的 P路信号合并成第二带 宽信号, 所述 P为小于或等于 N的正整数;
对所述第二带宽信号进行数模转化获得第二模拟信号;
所述方法还包括:
将所述第二模拟信号转换为第二射频信号, 以便在第二天线上发送第二 射频信号。
16、 根据权利要求 15的方法, 其特征在于, 所述对所述 N路第一子数 字信号流进行调制, 包括:
采用 N个调制器分别对所述 N个第一子数字信号流进行调制, 其中所述对所述 N路第二子数字信号流进行调制, 包括:
采用所述 N个调制器分别对所述 N个第二子数字信号流进行调制。
17、 根据权利要求 12的方法, 其特征在于, 所述天线为双极化天线, 所述双极化天线包括 H极化与 V极化天线, 所述对所述 N路第一子数字信 号流进行调制, 该方法还包括:
在所述预定带宽上获得待发送的第二数据,并且将所述第二数据分解为 并行的 K路第二子数字信号流, 所述 K路第二子数字信号流中的每个第二 子数字信号流占用的带宽小于所述预定带宽, 其中 K为为大于 1的正整数; 在 V极化上对所述 K路第二子数字信号流进行调制, 以获得 K路第二 调制信号;
对所述 K路第二调制信号进行频率搬移,其中经过频率搬移后的所述 K 路第二调制信号中的相邻第二调制信号之间没有频带间隔;
将经过频率搬移后的所述 K路第二调制信号中的至少两路信号合并成 第二带宽信号;
对所述第二带宽信号进行数模转化获得第二模拟信号;
则所述方法还包括:
接收所述第二模拟信号, 并且将所述第二模拟信号转换为第二射频信 号;
将所述第一射频信号和所述第二射频信号进行耦合, 以便在所述双极化 天线上分别发送所述第一射频信号和所述第二射频信号,其中在 H极化上发 送所述第一射频信号 ,V极化上发送所述第二射频信号。
18、 根据权利要求 17的方法, 其特征在于,
所述对所述 Ν路第一子数字信号流进行调制, 包括:
采用 Ν个调制器分别对所述 Ν个第一子数字信号流进行调制, 其中所述对所述 Κ路第二子数字信号流进行调制, 包括:
采用 Κ个调制器分别对所述 Κ个第二子数字信号流进行调制。
19、 根据权利要求 12至 18所述的方法, 其特征在于, 所述将经过频率 搬移后的所述 Ν路第一调制信号中的 Μ路第一调制信号合并成第一带宽信 号, 包括:
采用加法器将经过频率搬移的所述 Ν个第一调制信号相加,以合并成第 一宽带信号。
20、 根据权利要求 12至 19中的任一项所述的方法, 其特征在于, Ν至 少为 4, 所述第一数据为至少一个二进制数字信号流。
21、 一种传输数据的方法, 其特征在于, 包括: 接收数据的方法和如权 利要求 12至 20所述的发射数据的方法,
其中所述接收数据的方法, 包括:
将在接收天线上接收的射频信号转换为模拟信号;
将所述模拟信号分解为 Q个并行的子模拟信号流;
将所述 Q个并行的子模拟信号流进行频率搬移; 对所述 Q个并行的子模拟信号流分别进行模数转换获得 Q个并行的数 字信号流;
对所述 Q个并行数字信号流进行解调处理, 获得 Q个并行的解调信号; 将所述 Q个并行的解调信号合成第二数据。
22、 一种通信方法, 其特征在于, 包括: 接收数据的方法和如权利要求 12至 20所述的发射数据的方法;
其中所述接收数据的方法, 包括:
将在接收天线上接收的所述射频信号转换为模拟信号;
将所述模拟信号分解为 N个并行的子模拟信号流;
将所述 N个并行的子模拟信号流进行频率搬移;
对所述 N个并行的子模拟信号流分别进行模数转换获得 N个并行的数 字信号流;
对所述 N个并行数字信号流进行解调处理, 获得 N个并行的解调信号; 将所述 N个并行的解调信号合成所述第一数据。
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