WO2013060268A1 - Procédé de transmission de signaux et dispositif de transmission de signaux - Google Patents

Procédé de transmission de signaux et dispositif de transmission de signaux Download PDF

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Publication number
WO2013060268A1
WO2013060268A1 PCT/CN2012/083423 CN2012083423W WO2013060268A1 WO 2013060268 A1 WO2013060268 A1 WO 2013060268A1 CN 2012083423 W CN2012083423 W CN 2012083423W WO 2013060268 A1 WO2013060268 A1 WO 2013060268A1
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WIPO (PCT)
Prior art keywords
symbol
transmission
phase
modulation mode
repeatedly transmitted
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Ceased
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PCT/CN2012/083423
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English (en)
Chinese (zh)
Inventor
高磊
陈小锋
卡尔切夫·乔治
陈斌
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2013060268A1 publication Critical patent/WO2013060268A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a signal transmission method and a signal transmission apparatus. Background technique
  • the typical coverage radius is only about 100-200m, and the IEEE (Institute of Electrical and Electronics Engineers) 802.11ah protocol is designed to achieve a maximum coverage radius of 1km.
  • the coverage radius of WLANs is greatly increased, and new features need to be introduced in various aspects to support wider coverage.
  • Orthogonal Frequency Division Multiplexing belongs to the multi-carrier transmission technology.
  • the so-called multi-carrier transmission technology refers to dividing the available spectrum into multiple sub-carriers, and each sub-carrier can carry a low-speed data stream. Since each subcarrier has a smaller bandwidth and is closer to the coherence bandwidth, it can effectively resist the selective attenuation of the frequency.
  • the resources of an OFDM system sometimes have a two-dimensional concept in the frequency domain.
  • the minimum unit of the frequency domain is generally a subcarrier, and the minimum unit of the time domain is generally the time of one OFDM symbol.
  • OFDM symbols are repeated by directly repeating or repeating frequency domain switching.
  • the number of repetitions in IEEE 802.15 is fixed, so no explicit indication is required. However, the number of fixed repetitions is not flexible enough. If an unfixed number of repetitions is used, the number of repetitions is determined by signaling interaction between the transmitter and the receiver, and the signaling overhead of the system needs to be increased, and the frequency of change cannot be too fast, and such a scheme is also not flexible enough.
  • the embodiment of the invention provides a signal transmission method and a signal transmission device, which can solve the problem that the determination method of the symbol repetition times in the prior art is not flexible enough.
  • a signal transmission method comprising: generating a transmission signal, the transmission signal including at least one symbol; repeatedly transmitting a symbol, wherein the repeatedly transmitted symbol has at least two phases to indicate the number of times the symbol is repeatedly transmitted.
  • a signal transmission method including: receiving a transmission signal, where the transmission signal includes at least one symbol in a repeated transmission manner; determining that the symbol is repeatedly transmitted according to at least two phases of the repeatedly transmitted symbol frequency.
  • a signal transmission apparatus including: a generating unit, configured to generate a transmission signal, where the transmission signal includes at least one symbol; and a sending unit, configured to repeatedly send the symbol included in the transmission signal generated by the generating unit The symbol repeatedly transmitted by the sending unit has at least two phases to indicate the number of times the symbol is repeatedly transmitted.
  • a signal transmission apparatus including: a receiving unit, configured to receive a transmission signal, where the transmission signal includes at least one symbol in a repeated transmission manner; and a determining unit, configured to receive, according to the transmission signal received by the receiving unit The at least two phases of the symbols repeatedly transmitted in the medium determine the number of times the symbol is repeatedly transmitted.
  • the symbols that are repeatedly transmitted have different phases, and the number of times the symbols are repeatedly transmitted is implicitly indicated, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • FIG. 1 is a flow chart of a signal transmission method according to an embodiment of the present invention.
  • FIG. 2 is a flow chart of a signal transmission method according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of a signal transmission method according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a repeat transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a repeated transmission mode according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • Figure 10 is a block diagram of a signal transmission apparatus of one embodiment of the present invention.
  • Figure 11 is a block diagram of a signal transmission apparatus according to another embodiment of the present invention.
  • Figure 12 is a block diagram of a signal transmission apparatus according to another embodiment of the present invention. detailed description
  • FIG. 1 is a flow chart of a signal transmission method according to an embodiment of the present invention. The method of Figure 1 is performed by the transmitting end of the signal, such as a transmitter.
  • the at least one symbol may be an OFDM symbol, and may include control signaling symbols, data symbols, and other symbols.
  • OFDM orthogonal frequency division multiple access
  • control signaling symbols data symbols
  • other symbols for example, the following description is made by taking an OFDM system as an example, but the embodiment of the present invention is not limited thereto.
  • the technique of the embodiments of the present invention can be applied to a system that requires repeated transmission of symbols.
  • the embodiment of the present invention does not limit the manner in which the transmission signal is generated, and the transmission signal including at least one symbol may be generated in any existing manner.
  • the symbol is repeatedly sent when the symbol is in the repeated transmission mode, wherein the repeatedly transmitted symbol has at least two phases to indicate the number of times the symbol is repeatedly transmitted.
  • the symbol may be repeatedly transmitted by using a first modulation mode and a second modulation mode, where the first modulation mode has a phase rotation of 90 degrees or 270 degrees with respect to the second modulation mode.
  • the symbol is modulated by the first modulation method or the second modulation method, and the modulated symbol is spread to generate a symbol for repeated transmission having at least two phases. Both of these methods enable the symbols that are repeatedly transmitted to have different phases.
  • the first modulation mode is BPSK (Binary Phase Shift Keying)
  • the second modulation mode is QBPSK. (Quarature Binary Phase Shift Keying, orthogonal binary phase shift keying); vice versa.
  • the first modulation mode may be used in the first transmission for each symbol, and the subsequent transmission is repeated.
  • the second modulation method is used.
  • the above-described first transmission and subsequent repeated transmission may be performed continuously, that is, after each symbol and its repeated version are transmitted, the next symbol is transmitted.
  • subsequent repeated transmission of all symbols is performed, that is, after all symbols (for example, all symbols corresponding to one frame of data) are sent, the entire repeated version of all the symbols is sent. .
  • the at least one symbol may include a first control signaling symbol, a second control signaling symbol, and a data symbol.
  • the first control signaling symbol may use the first modulation mode in the first transmission and the subsequent N repeated transmissions; the second control signaling symbol is used in the first transmission and the subsequent M repeated transmissions.
  • the second control signaling uses the first modulation mode when the remaining NM times are repeatedly transmitted; the data symbols are repeatedly sent M times after the first transmission.
  • N and M are positive integers.
  • the repeat transmission method may include at least one of the following methods: time domain repetition, frequency domain repetition, and cascade repetition encoder.
  • the symbols that are repeatedly transmitted have different phases, and the number of times the symbols are repeatedly transmitted is implicitly indicated, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • FIG. 2 is a flow chart of a signal transmission method according to an embodiment of the present invention.
  • the method of Fig. 2 is performed by the receiving end of the signal (e.g., receiver) and corresponds to the method of Fig. 1, and thus the repeated description will be omitted as appropriate.
  • the transmission signal includes at least one symbol that uses a repeated transmission manner.
  • the at least one symbol may be an OFDM symbol, and may include control signaling symbols, data symbols, and other symbols.
  • the following description is made by taking an OFDM system as an example, but the embodiment of the present invention is not limited thereto.
  • the technique of the embodiments of the present invention can be applied to a system that requires repeated transmission of symbols.
  • the phase of the symbol can be determined by detecting the real and imaginary energy of the symbol. Specifically, for each symbol repeatedly transmitted, when the difference between the real energy of the symbol minus the imaginary energy is higher than (or not lower than) the threshold A, it is determined that the symbol has the first phase, and when the symbol When the difference between the real energy minus the imaginary energy is lower (or not higher than) -A, it is determined that the symbol has the second phase. Where A is a positive number. The number of times the symbol is repeatedly transmitted can then be determined based on the number of occurrences of the first phase and/or the second phase.
  • the first phase may have a phase rotation of 90 degrees or 270 degrees with respect to the second phase.
  • the number of occurrences of the second phase (for example, N, N is positive)
  • the result of adding 1 to the integer is used as the number of times the symbol is repeatedly transmitted (ie, N+1).
  • the phase of the first transmission of each symbol it may be a default value (e.g., the first phase), or the phase of the first transmission of the symbol may be determined based on the same energy detection method as described above.
  • the foregoing at least one symbol includes a first control signaling symbol, a second control signaling symbol, and a data symbol.
  • the number of occurrences N+1 of the first phase of the first control signaling symbol may be determined, and the number of occurrences M+1 of the second phase of the second control signaling symbol may be determined, and then may be The number of occurrences N+1 and M+1 determines that the control signaling symbol is repeatedly transmitted N times after the first transmission, and determines that the data symbol is repeatedly transmitted M times after the first transmission, where N and M are positive integers.
  • the symbols that are repeatedly transmitted have different phases, and the number of times the symbols are repeatedly transmitted is implicitly indicated, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • Figure 3 is a flow chart of a signal transmission method according to another embodiment of the present invention. The method of Figure 3 is performed by the receiving end of the signal (e.g., receiver). Figure 3 differs from Figure 2 in that the method of Figure 3 further includes:
  • the symbol when the symbol has a first phase, the symbol can be demodulated using a first modulation scheme.
  • the symbol when the symbol has a second phase, the symbol can be demodulated using a second modulation scheme.
  • the first modulation method may be BPSK
  • the second modulation method may be
  • the blind detection method is used for demodulation.
  • the so-called blind detection that is, the receiver is based on Do not repeat, repeat, repeat twice, try to demodulate, combine and decode, and perform CRC (cyclic redundancy check) check. If the CRC check passes, the test is considered correct, stop the next step. Action; If the CRC check fails, continue H repeatedly without repeated attempts until the maximum number of repetitions agreed by the sender and the receiver is reached.
  • the symbol is modulated in a modulation mode (for example, the first modulation mode or the second modulation mode described above) in step 102, and then the symbols that are repeatedly transmitted have different phases by spreading.
  • the receiver of the embodiment of the present invention may first perform despreading processing on the repeatedly received symbols, and then perform demodulation processing using the above modulation method (for example, the first modulation method or the second modulation method).
  • the embodiment of the present invention makes the repeatedly transmitted symbols have different phases, implicitly indicating the number of times the symbol is repeatedly transmitted, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • the embodiment of the invention can determine the corresponding demodulation mode according to the phase information.
  • the number of repetitions of each symbol is the same, it is possible to detect only the number of repetitions of one of the symbols, or to detect the number of repetitions of each of the plurality of symbols to improve the accuracy of the detection.
  • the case where the number of repetitions of each symbol is the same is taken as an example, and therefore, for the sake of brevity, only the repeated transmission of two symbols (symbol 1 and symbol 2) is depicted in the figure.
  • embodiments of the invention are not limited thereto.
  • the principles of the embodiments of the present invention can be understood by those skilled in the art according to the teachings of the embodiments of the present invention.
  • the principles of the embodiments of the present invention are equally applicable to scenarios in which each symbol is repeated a different number of times, and/or applied to more than two symbols. Scene. Such applications are all within the scope of the invention.
  • FIG. 4 is a schematic diagram of a repeat transmission method according to an embodiment of the present invention.
  • the symbol is a control signaling symbol or a data symbol
  • the number of repetitions is N+1 times
  • the modulation mode at the time of the first transmission is BPSK
  • the modulation method when the subsequent transmission is repeated N times is QBPSK (BPSK plus a 90 degree phase rotation).
  • embodiments of the present invention are not limited to the specific modulation method described above.
  • the symbol 1 is first modulated with BPSK, and then the QBPSK modulation is used for all the repeated portions of the symbol 1.
  • BPSK modulation is applied to the symbol 2
  • QBPSK modulation is applied to the repeated portions of the symbol 2.
  • the received signal is subjected to reception processing such as OFDM demodulation and equalization, and energy detection is performed on the signal before demodulation.
  • the first symbol received is the symbol 1 and the default must be BPSK. From the second symbol, it may be the repetition of symbol 1 or the next symbol (such as symbol 2). Therefore, starting from the second symbol, it is judged by energy detection whether the modulation symbol is BPSK or QBPSK, and the specific judgment method is:
  • A is a positive number.
  • the symbol is judged to be BPSK modulation. If the difference between the real energy of the digital signal of the symbol and the imaginary energy is less than (or not higher than) -A, then the symbol is judged to be QBPSK modulated.
  • the symbol is QBPSK
  • the symbol is considered to be a repeated symbol, and the symbol can be soft demodulated and directly combined with the preceding symbol for soft information.
  • the modulation mode of the symbol is BPSK
  • the symbol is considered to be the next new symbol. In this case, it is determined that the symbol is repeatedly transmitted N+1 times in total according to the number of occurrences of QBPSK (i.e., N times).
  • the pre-demodulation constellation has significant residual phase noise, which may cause the real imaginary energy of the BPSK signal constellation before demodulation. If the judgment is inaccurate, the difference between the real part and the imaginary part of the digital signal of the symbol is between -A and A, and it is judged that the symbol is neither BPSK nor QBPSK. At this time, the receiver considers that the repetition of the implicit indication by the modulation mode is inaccurate, and will be demodulated by blind detection.
  • the so-called blind detection that is, the receiver attempts to demodulate, combine and decode according to non-repetition, repetition, and repetition, and performs CRC check.
  • the CRC check passes, the detection is considered correct, and the next action is stopped; If the CRC check fails, it is assumed that more repeated attempts are made until the maximum number of repetitions agreed by the transmitting and receiving parties is reached.
  • the numbers have different phases.
  • only one modulation method such as BPSK can be used.
  • the constellation rotation is performed after BPSK modulation, for example, the BPSK modulated signal is spread in the time domain using the following sequence:
  • the sequence is multiplied by the original symbol to obtain [symbol 1, j* symbol 1], so the above sequence is used to first repeat the original symbol by 1x, and then the first repetition of the symbol is 90 degrees.
  • Phase rotation (multiplied by the role of j). Similar effects can be obtained with other spreading sequences, such as [1 -j], except that the original symbol is rotated 270 degrees (multiplied by -j).
  • the constellation points of the real axis are rotated onto the imaginary axis.
  • the transmitting and receiving end needs to pre-arrange a set of spreading sequences, for example, repeating [lj] once, repeating [lj -j] twice, repeating four times [lj -jj] , So on and so forth.
  • the number of repetitions is first determined by energy detection, and then despreading is performed according to the spreading sequence corresponding to the number of repetitions.
  • the symbols that are repeatedly transmitted have different phases, implicitly indicating the number of times the symbols are repeated, and do not increase the signaling burden.
  • FIG. 5 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • the main difference between the embodiment of FIG. 5 and the embodiment of FIG. 4 is that the embodiment of FIG. 5 performs an overall repetition after all original symbols (eg, symbol 1 to symbol X, X are positive integers) are transmitted. .
  • the embodiment of FIG. 5 can perform an energy judgment on all the signals of the first repetition of the symbol 1 to the symbol X as a whole, which can improve the signal-to-noise ratio and improve the reliability of the judgment result. Therefore, the probability of requiring blind detection is lower.
  • FIG. 4 uses a repeating transmission mode in the time domain.
  • the embodiment of the present invention can also apply other repeated transmission modes, such as a frequency domain repetition mode.
  • Fig. 6 is a schematic diagram of a repeated transmission mode according to another embodiment of the present invention. In the embodiment of Figure 6, the repetition of the frequency domain is achieved for the symbols.
  • the difference from the embodiment of FIG. 4 is that the transmitter repeats on different frequency segments, and the receiver needs to perform energy detection on different frequency segments to determine whether there is a repetition and Repeat several times.
  • the specific modulation method, energy detection process, and demodulation mode are similar to those of the embodiment of Fig. 4, and therefore the description will not be repeated.
  • FIG. 7 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • the embodiment of Figure 7 uses a time domain repeating method of frequency domain switching.
  • the symbols that are repeatedly transmitted have different phases, implicitly indicating the number of times the symbols are repeated, and do not increase the signaling burden.
  • the embodiment of Figure 7 exchanges the mapping relationship of the data of the two repeated symbols on the frequency domain subcarriers. Since the wireless multi-environment environment brings frequency domain selectivity, the upper side band data when symbol 1 and symbol 1 are repeated undergo different fading, which can bring about the diversity of fading in the frequency domain, that is, the frequency diversity gain.
  • FIG. 8 is a schematic diagram showing a repeating transmission mode according to another embodiment of the present invention.
  • the embodiment of Figure 8 uses a time domain repeating method of frequency domain repetition. It should be noted that in FIG. 8 , for the sake of simplicity of the drawing, only an example in which two symbols are repeatedly transmitted five times is displayed, and the embodiment of the present invention is not limited thereto, and the same can be used for more repeated transmissions of more symbols or less. .
  • the embodiment of the present invention can also use the repeated transmission mode of the cascaded repeating encoder. In this mode, repetition is performed by cascading a repeating encoder after the encoded data.
  • the transmitting end and the receiving end need to negotiate an interleaving mechanism in advance to ensure that the receiving end can correctly deinterleave.
  • the behavior of the receiving end is basically similar. First, it is necessary to judge the number of repetitions according to the energy detection, and then send the information of the repetition number to the deinterleaver and the decoder so that it can be correctly deinterleaved and decoded. In this way, it is also possible to make the repeatedly transmitted symbols have different phases, implicitly indicating the number of times the symbols are repeated, and without increasing the signaling burden.
  • the cascaded repeating encoder can also be used in combination with the other two types of repeated transmissions. To avoid repetition, it will not be described again.
  • FIG. 9 is a schematic diagram of a repeat transmission method according to another embodiment of the present invention.
  • the number of repeated transmissions of control signaling symbols is implicitly indicated using different phases of the repeatedly transmitted control signaling symbols, while also implicitly indicating the manner in which the data symbols are repeated.
  • synchronization time is first obtained by synchronization sequence detection, then channel estimation is performed by pilot to demodulate control signaling, and finally through pilot channel estimation and control signaling messages (including data usage)
  • the data is detected by the modulation and coding method and the length of the data. Therefore, the detection of the control signaling symbols is before the detection of the data symbols, so the different phases of the control signaling symbols can be used to indicate the number of repetitions of the data symbols. It is assumed that each control signaling symbol is repeatedly transmitted N+1 times, and each data symbol is repeatedly transmitted M+1 times.
  • control signaling symbol 1 and its repetition are all BPSK modulated
  • the first M+1 symbols of symbol 2 are modulated with QBPSK
  • the latter N-M symbols are still BPSK modulated.
  • Each data symbol is repeatedly sent M+1 times and can be repeated in any way.
  • repeatedly transmitted data symbols can have the same phase or use the same modulation scheme.
  • the receiving end can determine the number of repetitions N + l of the control signaling itself by controlling the number of repetitions N of the signaling symbol 1 and another modulation mode thereof.
  • the number of repetitions M+l of the following data symbols is determined.
  • the process of obtaining N and M at the receiving end is the same as that of the above embodiment, and will not be described again here.
  • the repeatedly transmitted symbols it is possible to cause the repeatedly transmitted symbols to have different phases, implicitly indicating the number of times the symbols are repeated, and without increasing the signaling burden.
  • the phase or modulation of the repeatedly transmitted data symbols is not limited and the implementation is more flexible.
  • FIG. 10 is a block diagram of a signal transmission apparatus of one embodiment of the present invention.
  • the signal transmission device 90 of Fig. 10 is a transmitting end of data, and may be, for example, a transmitter, and includes a generating unit 91 and a transmitting unit 92.
  • the generating unit 91 generates a transmission signal including at least one symbol.
  • the transmitting unit 92 repeatedly transmits the symbols included in the transmission signal generated by the generating unit 91, wherein the symbols repeatedly transmitted by the transmitting unit 92 have at least two phases to indicate the number of times the symbol is repeatedly transmitted.
  • Embodiments of the present invention cause repeatedly transmitted symbols to have different phases, implicitly indicating the symbol The number of times of transmission is repeated, so that the number of repetitions can be flexibly determined without increasing signaling overhead.
  • the signal transmission device 90 of FIG. 10 may implement the various steps of the method of FIG. 1, or may implement various modes of modulation and transmission in the embodiments of FIGS. 4-9, which are not described in detail to avoid repetition.
  • the sending unit 92 may repeatedly transmit the symbols by using the first modulation mode and the second modulation mode, wherein the first modulation mode has a phase rotation of 90 degrees or 270 degrees with respect to the second modulation mode.
  • the transmitting unit 92 may use the symbols transmitted by the first modulation mode or the second modulation mode pair.
  • the sending unit 92 may use the first modulation mode for the first transmission and the second modulation mode for the subsequent repeated transmission for each symbol.
  • the transmitting unit 92 may continuously perform the first transmission and the subsequent repeated transmission for each symbol (for example, as described in the embodiment of FIG. 4). Alternatively, transmitting unit 92 may perform subsequent repeated transmissions of all symbols (e.g., as described in the embodiment of Figure 5) after the first transmission of all symbols.
  • the at least one symbol includes a first control signaling symbol, a second control signaling symbol, and a data symbol.
  • the transmitting unit 92 may cause the first control signaling symbol to use the first modulation mode in the first transmission and the subsequent N repeated transmissions, so that the second control signaling symbol is used in the first transmission and the subsequent M repeated transmissions.
  • the second modulation mode is such that the second control signaling uses the first modulation mode when the remaining NM times are repeatedly transmitted, and causes the data symbols to be repeatedly transmitted M times after the first transmission, where N and M are positive integers.
  • the first modulation mode is BPSK
  • the second modulation mode is QBPSK
  • the sending unit 92 may repeatedly send the symbol according to at least one of the following repeated transmission modes: time domain repetition, frequency domain repetition, and cascade repetition encoder.
  • FIG. 11 is a block diagram of a signal transmission apparatus according to another embodiment of the present invention.
  • the signal transmission device 100 of Fig. 11 is a receiving end of data, and may be, for example, a receiver, including a receiving unit 11 and a determining unit 12.
  • the receiving unit 11 receives a transmission signal including at least one symbol in a repeat transmission manner.
  • the determining unit 12 repeats the transmitted symbol according to the transmission signal received by the receiving unit 11 With at least two phases, the number of times the symbol is repeatedly transmitted is determined.
  • the symbols that are repeatedly transmitted have different phases, and the number of times the symbols are repeatedly transmitted is implicitly indicated, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • the determining unit 12 may determine, for each symbol that is repeatedly sent, when the difference between the real energy of the symbol minus the imaginary energy is higher or lower than the threshold A, determining that the symbol has The first phase, and when the difference between the real energy of the symbol minus the imaginary energy is lower or lower than -A, it is determined that the symbol has a second phase.
  • the determining unit 12 can also determine the number of times the symbol is repeatedly transmitted based on the number of occurrences of the first phase and/or the second phase.
  • the determining unit 12 may determine the number of times the number of occurrences of the second phase is incremented by 1 in the case where it is determined that each symbol has a second phase when the subsequent repeated transmission is performed after the first transmission as the number of times the symbol is repeatedly transmitted. (such as described in the embodiment of Figure 4 or Figure 5).
  • the at least one symbol includes a first control signaling symbol, a second control signaling symbol, and a data symbol.
  • the determining unit 12 may determine the number of occurrences N+1 of the first phase of the first control signaling symbol, and determine the number of occurrences M+1 of the second phase of the second control signaling symbol. Then, the determining unit 12 can determine, according to the number of occurrences N+1 and M+1, that the control signaling symbol is repeatedly transmitted N times after the first transmission, and determines that the data symbol is repeatedly sent M times after the first transmission, where N and M Is a positive integer.
  • the first phase has a phase rotation of 90 degrees or 270 degrees with respect to the second phase.
  • Figure 12 is a block diagram of a signal transmission apparatus according to another embodiment of the present invention.
  • the signal transmission device 110 of Fig. 12 includes all of the components of the signal transmission device 100 of Fig. 10, and further includes a demodulation unit 13 for demodulating the repeatedly transmitted symbols based on the first phase and the second phase.
  • the demodulation unit 12 can be configured to demodulate the symbol using the first modulation method when the symbol has the first phase; demodulate the symbol using the second modulation method when the symbol has the second phase; When the difference between the real energy minus the imaginary energy is between -A and A, the blind detection method is used for demodulation.
  • the first modulation mode is BPSK
  • the second modulation mode is QBPSK, and vice versa.
  • the symbols that are repeatedly transmitted have different phases, and the number of times the symbols are repeatedly transmitted is implicitly indicated, so that the number of repetitions can be flexibly determined without increasing the signaling overhead.
  • the signal transmission device 100 of FIG. 11 and the signal transmission device 110 of FIG. 12 may implement the various steps of the method of FIG. 2 or FIG. 3, or may implement the reception, repetition count detection, and demodulation in the embodiments of FIGS. 4-9. Various ways, to avoid repetition, will not be described in detail.
  • a communication system in accordance with an embodiment of the present invention may include the above described apparatus 90, 100 or 110.
  • 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 components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over 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 may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included 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 removable 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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  • Computer Networks & Wireless Communication (AREA)
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  • Radio Transmission System (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé de communications et un dispositif de communications. Le procédé de communications consiste à : générer un signal de transmission, ledit signal de transmission comprenant au moins un symbole ; envoyer à plusieurs reprises le symbole, le symbole envoyé à plusieurs reprises ayant au moins deux sortes de phases afin d'indiquer le nombre de fois où le symbole a été envoyé à plusieurs reprises. Dans des modes de réalisation de la présente invention, un symbole envoyé à plusieurs reprises a plusieurs phases afin d'indiquer implicitement le nombre de fois où le symbole a été envoyé à plusieurs reprises, permettant de cette façon de déterminer de manière flexible le nombre de répétitions sans augmenter le surdébit de signalisation.
PCT/CN2012/083423 2011-10-24 2012-10-24 Procédé de transmission de signaux et dispositif de transmission de signaux Ceased WO2013060268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110325126.2 2011-10-24
CN201110325126.2A CN103067327B (zh) 2011-10-24 2011-10-24 信号传输方法和信号传输装置

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WO2013060268A1 true WO2013060268A1 (fr) 2013-05-02

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