WO2003088539A1 - Radio transmitter apparatus, radio receiver apparatus, and method thereof - Google Patents
Radio transmitter apparatus, radio receiver apparatus, and method thereof Download PDFInfo
- Publication number
- WO2003088539A1 WO2003088539A1 PCT/JP2003/004743 JP0304743W WO03088539A1 WO 2003088539 A1 WO2003088539 A1 WO 2003088539A1 JP 0304743 W JP0304743 W JP 0304743W WO 03088539 A1 WO03088539 A1 WO 03088539A1
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- WO
- WIPO (PCT)
- Prior art keywords
- control channel
- channel
- data channel
- subcarriers
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
Definitions
- the present invention relates to a wireless transmission device, a wireless reception device, and a method used in a digital wireless communication system.
- a data transmission channel for transmitting audio data and / or image data, and control of a communication station or a communication state of a communication partner are performed.
- a method of allocating a small number of subcarriers to the control channel and allocating a large number of subcarriers to the data channel is considered in order to reduce the power consumption of mobile stations.
- the receiving device performs A / D conversion on the control channel at a relatively low sampling rate and receives the control channel for the purpose of receiving a narrow-band control channel composed of a small number of subcarriers. Accordingly, the sampling rate of the A / D conversion for the received signal is set to a high value, so that it can be used for reception of a wideband data channel composed of many subcarriers.
- the center frequency of a data channel including a plurality of subcarriers 2 and the center frequency of a control channel 6 are different from each other.
- to switch the reception from control channel 6 to data channel 4 change the frequency of the local signal for down-converting the subcarrier of control channel 6.
- the oral signal is used to set the center frequency of the transmission frequency band on the transmission side, multiply the transmission signal after D / A conversion, and up-convert the transmission signal.
- the received signal is down-converted by multiplying the signal received via the antenna by the oral signal.
- An object of the present invention is to provide a radio transmitting apparatus, a radio receiving apparatus, and a method thereof, which can switch a control channel and a data channel at high speed on the radio receiving apparatus side.
- a plurality of subcarriers are allocated to a data channel, a smaller number of subcarriers are allocated to a control channel than the plurality of subcarriers, and
- the control channel is allocated to the center frequency of the frequency band used for transmission, so that the frequency of the local signal to be multiplied with the received signal is made common on the wireless receiving device side.
- FIG. 1 is a signal waveform diagram for explaining a conventional operation.
- FIG. 2 is a schematic diagram used to explain a conventional operation.
- FIG. 3 is a block diagram showing a configuration of the wireless transmission apparatus according to Embodiment 1 of the present invention.
- FIG. 4 is a signal waveform diagram showing a transmission signal according to Embodiment 1.
- FIG. 5 is a block diagram showing a configuration of the wireless reception device according to Embodiment 1 of the present invention.
- FIG. 6 is a schematic diagram used for describing the operation of the first embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration of a radio transmission apparatus according to Embodiment 2 of the present invention.
- FIG. 8A is a schematic diagram for explaining the operation of the second embodiment of the present invention.
- FIG. 8B is a schematic diagram explaining the operation of the second embodiment of the present invention.
- FIG. 9 is a block diagram showing a configuration of a wireless reception device according to Embodiment 2 of the present invention.
- FIG. 10 is a signal waveform diagram used for describing another embodiment.
- FIG. 11A is a signal waveform diagram used for describing another embodiment.
- FIG. 11B is a signal waveform diagram used for describing another embodiment.
- FIG. 12 is a signal waveform diagram used for describing another embodiment.
- FIG. 13 is a signal waveform diagram used for describing another embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 3 is a block diagram showing a configuration of radio transmitting apparatus 10 according to Embodiment 1 of the present invention.
- radio transmitting apparatus 10 is provided in a base station apparatus or a mobile station apparatus, and multiplexes a control channel signal and a data channel signal to transmit.
- a case will be described in which a signal is transmitted using a bandwidth of 100 [MHz] in a frequency band having a center frequency of 5 [GHz].
- a bandwidth of l [MHz] is used as a control channel, and a bandwidth of 100 [MHz] is not used as a control channel out of a bandwidth of 100 [MHz] as a demodulation channel.
- the control channel signal is spread in spreading section 11, modulated, and subjected to modulation processing by a predetermined modulation scheme in section 12, and then supplied to multiplexing section 14.
- the demodulation channel signal is supplied to a multiplexing unit 14 after being subjected to a modulation process in a modulation unit 13.
- the multiplexing unit 14 converts the control channel signal and the demodulated channel signal so that the modulated control channel signal and the demodulated channel signal are mapped to the center frequency of the transmission band. Multiplex.
- the output of the multiplexing unit 14 is supplied to a serial / parallel conversion unit (S / P) 15 where it is subjected to serial / parallel conversion, and then subjected to an inverse fast Fourier transform (IFFT) unit 16 for inverse fast Fourier transform processing.
- IFFT inverse fast Fourier transform
- the output of the IFFT section 16 is converted into an analog signal by a digital-to-analog (D / A) conversion section 17 and then multiplied by a local signal (carrier signal) by a multiplication section 18. Since the local signal is set to the center frequency (5 [GHz]) of the band used for transmission, the signal resulting from the multiplication of the oral signal in the multiplier 18 is transmitted in the transmission band (5 [GHz]). ] Up-converted to ⁇ 50 [MHz]), amplified by the amplifier (AMP) 19, and transmitted via the antenna 21.
- D / A digital-to-analog
- AMP amplifier
- the number of subcarriers 32 constituting the control channel 34 is equal to the number of subcarriers 31 constituting the data channel 33 as shown in FIG. Composed of fewer than
- the control channel 34 is placed at the center frequency fc of the transmission band (FFT range) of the data channel 33.
- control channel 34 By arranging the control channel 34 at the center frequency fc of the overnight channel 33 in this way, it becomes possible to use a common local frequency at the time of down-conversion on the receiving device side described later.
- FIG. 5 is a block diagram showing a configuration of the radio reception device 40 provided in the mobile station device or the base station device.
- a transmission signal received from radio transmission apparatus 10 via antenna 41 is amplified by amplification section 42 and then supplied to multiplier section 43.
- the multiplication unit 43 performs a mixing process by multiplying the signal supplied from the amplification unit 42 by a local signal set to 5 [GHz], which is the center frequency. As a result, the signal input to the multiplier 43 is down-converted.
- the channel selection unit 46 controls the bandpass filter 44 so that the band of 1 [MHz] is passed according to the control channel 34 of the received signal. Through. In this case, the channel selector 46 samples the control channel 34 at a sampling rate of 1 [Msps] corresponding to the bandwidth of the control channel 34 to the analog-to-digital (A / D) converter 45. ⁇ P to perform
- the channel selection unit 46 controls the bandpass filter 4 so that the band of 100 [MHz] is passed in accordance with the reception channel 33 of the reception signal, so that it is included in the reception signal. Pass through the data channel 33.
- the channel selection unit 46 sends the analog / digital (A / D) conversion unit 45 a data channel at a sampling rate of 100 [Msps] corresponding to the bandwidth of the data channel 33. 3 Control to perform 3 sampling.
- the switch unit 47 supplies the signal of the data channel 33 to the FFT (Fast Fourier Transform) unit 48 by being switched to the first switching output terminal side. . Supplied to FFT section 4 8
- the signal of the data channel 33 is subjected to high-speed Fourier transform processing, supplied to a parallel serial (P / S) section 49, converted into a serial signal, and then demodulated in the demodulation section 51.
- the switch 47 supplies the signal of the control channel 34 to the demodulator 50 by being switched to the second switching output terminal side.
- the signal of control channel 34 demodulated in demodulation section 50 is subjected to despreading in despreading section 52.
- the multicarrier signal transmitted from the wireless transmission device 10 is received by the wireless reception device 40 (FIG. 5), and is arranged at the center frequency: fc of the transmission band (data channel 33).
- the control channel 34 and the demultiplex channel 33 are down-converted by a common oral frequency. In this way, by performing down-conversion on the control channel 34 and the data channel 33 at the common oral frequency, the reception of the control channel 34 and the data channel 3 are performed as shown in FIG. It is not necessary to change the oral frequency when switching the reception of 3. As described above, since it is not necessary to change the oral signal frequency, it is possible to speed up the operation of switching reception from the control channel 34 to the data channel 33.
- the center frequency of the transmission band is affected by a DC (Direct Current) offset, but in this embodiment, the DC offset is achieved by spreading the control channels 34 arranged at the center frequency. Eliminate the effects of As a result, the wireless receiver 40 can receive the data of the control channel 34 with good quality.
- DC Direct Current
- the radio receiving apparatus 40 can take into account the inter-subcarrier interference. It is possible to design a filter without any need, and the circuit configuration of the filter can be simplified.
- FIG. 7 is a block diagram showing a configuration of the radio transmitting apparatus 60 according to Embodiment 2 of the present invention.
- radio transmitting apparatus 60 is provided in a base station apparatus or a mobile station apparatus, and represents information indicating a modulation scheme and a coding scheme in packet transmission (hereinafter, this is referred to as MCS (Modulation and Coding Schemes) information).
- MCS Modulation and Coding Schemes
- a signal (MCS signal) for notifying the signal (MCS signal) is multiplexed with the packet data and transmitted as a control channel. A case where a signal is transmitted using a bandwidth of 0 [MHz] will be described.
- the bandwidth of 1 [MHz] is used as the MCS signal, and the packet data is used for transmitting the MCS signal out of the bandwidth of 100 [MHz]. No Use 9 9 [MHz] bandwidth.
- the MCS signal is spread in spreading section 61, modulated in a predetermined modulation scheme in modulation section 63, and then supplied to multiplexing section 65.
- the data channel signal is coded in the coding unit 62 and supplied to the modulation unit 64 as a packet data.
- the packet data is supplied to a multiplexing unit 65 after being subjected to a modulation process in a modulation unit 64.
- the multiplexing unit 65 multiplexes the modulated MCS signal and the packet data so that the MCS signal and the packet data are mapped to the center frequency of the transmission band.
- the output of the multiplexing section 65 is supplied to a serial / parallel conversion section (S / P) 66 and subjected to serial / parallel conversion, and then subjected to an inverse fast Fourier transform (IFFT) section 67 for inverse fast Fourier transform processing.
- IFFT inverse fast Fourier transform
- the output of the 1 1 1 section 67 is converted into an analog signal in a digital / analog (D / A) conversion section 68, and then multiplied by a local signal (carrier signal) in a multiplication section 69. Since the local signal is set to the center frequency (5 [GHz]) of the band used for transmission, the signal obtained by multiplying the local signal in the multiplier 69 is transmitted in the transmission band (5 [ GHz] ⁇ 50 [MHz]), amplified by the amplifier (AMP) 70, and transmitted via the antenna 71.
- AMP amplifier
- the multicarrier signal generated in radio transmitting apparatus 60 is a packet data 95 in which MCS signal 96, which is a control channel signal, is arranged at the center frequency, and becomes an MCS signal 96. It will be transmitted subsequently.
- MCS signal 96 which is a control channel signal
- the MCS signal 96 By arranging the MCS signal 96 at the center frequency of the packet data 95 in this way, it becomes possible to use a common oral frequency at the time of down-conversion on the receiving device side described later.
- FIG. 9 is a block diagram showing a configuration of a radio receiving apparatus 80 provided in a mobile station apparatus or a base station apparatus.
- the transmission signal received from the wireless transmission device 60 via the antenna 81 is amplified by the amplifier 82 and then supplied to the multiplier 94.
- the multiplying unit 94 performs a mixing process by multiplying the signal supplied from the amplifying unit 82 by a set local signal of 5 [GHz] which is the center frequency. As a result, the signal input to the multiplier 94 is down-converted.
- the channel selection unit 85 controls the bandpass filter 83 so that a band of 1 [MHz] is passed in accordance with the MCS signal 96 of the received signal. By controlling this, only the MCS signal of the received signal can be received and the MCS signal is monitored. In this case, the channel selection unit 85 samples the MCS signal 96 at a sampling rate of 1 [Msps] corresponding to the bandwidth of the MCS signal 96 to the analog / digital (A / D) conversion unit 84. Is controlled to be performed.
- the MCS signal 96 is supplied to the demodulation section 88 via the switch section 86, where the MCS signal 96 is demodulated and then despread in the despreading section 90.
- the MCS decryption unit 93 is supplied.
- the MCS signal 96 contains information on whether or not bucket data addressed to the wireless receiving device 80 is transmitted in the next slot, and information on its modulation method and coding rate.
- the unit 93 decodes the information included in the MCS signal 96 to provide the channel selecting unit 85 with information for controlling the bandwidth of the band bus filter 83 for selecting the packet data and the like.
- the demodulation unit 91 for demodulating the packet data with information indicating the demodulation method read from the MCS signal 96.
- Information indicating the coding rate read from the MCS signal 96 is supplied to the error correction unit 92.
- the band-pass filter 83 and the analog-to-digital converter 84 perform band-pass and digital conversion processing according to the incoming bucket data, and further demodulates the data according to the method determined by the demodulator 91.
- the error correcting process can be performed in the correcting unit 92 while controlling the coding rate determined by the MCS information.
- the band-pass filter 83 will adjust the bandwidth of 100 [MHz] to match the packet data 95. Is controlled to pass through the bucket, so that the bucket passes through the bucket 95 included in the received signal.
- the channel selection unit 85 is the analog-to-digital (A / D) conversion unit 84 In response to this, control is performed so that sampling of packet data 95 is performed at a sampling rate of 100 [Msps] that matches the bandwidth of packet data 95.
- the switch 86 changes the switching output terminal according to the reception schedule of the packet data 95 decoded by the MCS decoding unit 93, and the FFT (Fast Fourier Transform) Supply to section 87.
- the bucket data 95 supplied to the FFT unit 87 is subjected to a high-speed Fourier transform process, supplied to a parallel / serial (P / S) unit 89, converted into a serial signal, and demodulated in a demodulation unit 91.
- the demodulation method is determined based on information decoded from the MCS signal 96 in the MCS decoding section 93.
- the packet data 95 demodulated in the demodulation unit 91 is subjected to error correction processing in the error correction unit 92.
- the coding rate is controlled based on the information decoded from the MCS signal 96 in the MCS decoding section 93, and the packet data is finally extracted.
- the MCS decoding section 93 decodes the MCS information included in the MCS signal 96 to match the reception schedule and the modulation method of the packet data 95 received after the MCS signal 96. Adaptive reception processing can be performed.
- the radio receiving apparatus 80 only needs to monitor whether or not the MCS signal 96 is received in a state where only the MCS signal 96 with a small bandwidth can be received.
- the sampling rate of the unit 84 can be reduced, and power consumption can be reduced.
- FIG. 8B shows the case where the bandwidth of the MCS signal 102 transmitted before the packet data 101 is equivalent to the bandwidth of the packet data 101, and as can be seen from FIG. Since the bandwidth of 102 is wide, the sampling rate of the analog-to-digital converter of the wireless receiver can be reduced. Also, the modulation method and coding method of packet data 95 were changed to MCS signal 96. By transmitting the information, the information can be notified to the wireless receiving device 80 only immediately before the packet data 96 is transmitted, and the power consumption of the wireless receiving device 80 can be reduced accordingly. can do. (Other embodiments)
- the present invention is not limited to this.
- the guard frequency bands 1 1 1 and 1 1 2 are set between the control ⁇ channel 34 and the data channel 33. It may be provided. By doing so, the pass band width of the non-pass filter 44 (FIG. 5) can be widened, and the circuit scale of the filter configuration can be reduced accordingly.
- guard frequency bands 11 1 and 11 2 between the control channel 34 and the data channel 33 have the same width.
- the present invention is not limited to this.
- guard frequency bands 1 2 (1 3 1) and 1 2 2 (1 3 2) are different from each other.
- the width may be used.
- control Channel 34 can be the same frequency as the FDMA (Frequency Division Multiple Access) configuration
- the local frequency of control channel 34 and local channel 33 can use the same frequency.
- the neighboring cell in the multi-cell environment is changed.
- the radio transmitting apparatus 10 measures information on a neighboring cell from the received signal, and changes the guard frequency width using the measurement result.
- the guard frequency can be controlled based on the information actually measured.
- each mobile station which is a radio receiving apparatus, can extract and receive only necessary control channels.
- Nyquist filter processing by Nyquist filter 141 is applied to control channel 34 and transmitted, so that other subcarriers (subcarrier 31 of the de-night channel) are transmitted.
- the sampling rate of the analog-to-digital converter on the wireless receiving device side can be reduced when a call is not being made.
- the power consumption of the wireless receiver can be reduced accordingly.
- a plurality of subcarriers are allocated to a data channel, and a smaller number of subcarriers are allocated to a control channel than the plurality of subcarriers.
- the radio receiving apparatus side can control the local signal multiplied by the received signal.
- the frequency can be shared, and the switching between the control channel and the data channel can be speeded up.
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Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/489,826 US7372909B2 (en) | 2002-04-17 | 2003-04-15 | Radio transmitting apparatus, radio receiving apparatus and method therefor |
| EP03717581.7A EP1496632B1 (en) | 2002-04-17 | 2003-04-15 | Radio transmitter apparatus, radio receiver apparatus, and method thereof |
| AU2003227497A AU2003227497A1 (en) | 2002-04-17 | 2003-04-15 | Radio transmitter apparatus, radio receiver apparatus, and method thereof |
| US12/061,599 US7760813B2 (en) | 2002-04-17 | 2008-04-02 | Radio transmitting apparatus, radio receiving apparatus and method therefor |
| US12/797,378 US8160167B2 (en) | 2002-04-17 | 2010-06-09 | Radio transmitting apparatus, radio receiving apparatus and method therefor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002114870A JP2003309533A (ja) | 2002-04-17 | 2002-04-17 | 無線送信装置、無線受信装置及びその方法 |
| JP2002-114870 | 2002-04-17 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10489826 A-371-Of-International | 2003-04-15 | ||
| US12/061,599 Division US7760813B2 (en) | 2002-04-17 | 2008-04-02 | Radio transmitting apparatus, radio receiving apparatus and method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003088539A1 true WO2003088539A1 (en) | 2003-10-23 |
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ID=29243402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/004743 Ceased WO2003088539A1 (en) | 2002-04-17 | 2003-04-15 | Radio transmitter apparatus, radio receiver apparatus, and method thereof |
Country Status (6)
| Country | Link |
|---|---|
| US (3) | US7372909B2 (ja) |
| EP (3) | EP2388939B1 (ja) |
| JP (1) | JP2003309533A (ja) |
| CN (2) | CN100547956C (ja) |
| AU (1) | AU2003227497A1 (ja) |
| WO (1) | WO2003088539A1 (ja) |
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| EP1560359A1 (en) * | 2004-01-27 | 2005-08-03 | NTT DoCoMo, Inc. | OFDM communication system and method |
| US7397839B2 (en) | 2004-01-27 | 2008-07-08 | Ntt Docomo, Inc. | OFDM communication system and method |
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| EP1745571B1 (en) * | 2004-05-01 | 2017-02-22 | Callahan Cellular L.L.C. | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| EP3193469A1 (en) * | 2004-05-01 | 2017-07-19 | Callahan Cellular LLC | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| US10511417B2 (en) | 2004-05-01 | 2019-12-17 | Intellectual Ventures Ii Llc | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| EP3734867A1 (en) * | 2004-05-01 | 2020-11-04 | Callahan Cellular LLC | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| US11082172B2 (en) | 2004-05-01 | 2021-08-03 | Intellectual Ventures Ii Llc | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| US20210376971A1 (en) * | 2004-05-01 | 2021-12-02 | Intellectual Ventures Ii Llc | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
| US12341712B2 (en) | 2004-05-01 | 2025-06-24 | Intellectual Ventures Ii Llc | Methods and apparatus for multi-carrier communications with variable channel bandwidth |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2388939A3 (en) | 2013-03-13 |
| US20100246702A1 (en) | 2010-09-30 |
| CN101616122A (zh) | 2009-12-30 |
| CN101616122B (zh) | 2012-05-23 |
| JP2003309533A (ja) | 2003-10-31 |
| CN1547818A (zh) | 2004-11-17 |
| EP1496632B1 (en) | 2017-02-22 |
| US7372909B2 (en) | 2008-05-13 |
| US8160167B2 (en) | 2012-04-17 |
| EP2388939B1 (en) | 2017-03-01 |
| EP2388938B1 (en) | 2017-03-01 |
| EP1496632A1 (en) | 2005-01-12 |
| US20080187064A1 (en) | 2008-08-07 |
| US20040264548A1 (en) | 2004-12-30 |
| EP1496632A4 (en) | 2010-12-29 |
| US7760813B2 (en) | 2010-07-20 |
| EP2388938A2 (en) | 2011-11-23 |
| EP2388939A2 (en) | 2011-11-23 |
| EP2388938A3 (en) | 2013-03-13 |
| CN100547956C (zh) | 2009-10-07 |
| AU2003227497A1 (en) | 2003-10-27 |
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