WO2017101602A1 - Procédé et appareil d'émission et de réception de diversité à plusieurs antennes - Google Patents

Procédé et appareil d'émission et de réception de diversité à plusieurs antennes Download PDF

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Publication number
WO2017101602A1
WO2017101602A1 PCT/CN2016/104144 CN2016104144W WO2017101602A1 WO 2017101602 A1 WO2017101602 A1 WO 2017101602A1 CN 2016104144 W CN2016104144 W CN 2016104144W WO 2017101602 A1 WO2017101602 A1 WO 2017101602A1
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Prior art keywords
antenna
antennas
signal
delay
symbol vector
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PCT/CN2016/104144
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English (en)
Chinese (zh)
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屈代明
李俊
江涛
闵雷
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华为技术有限公司
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    • 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
    • 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
    • H04L27/2697—Multicarrier modulation systems in combination with other modulation techniques
    • H04L27/2698—Multicarrier modulation systems in combination with other modulation techniques double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • 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
    • H04L27/2649—Demodulators
    • 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
    • H04L27/2649—Demodulators
    • H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a multi-antenna diversity transmission, multi-antenna diversity receiving method and apparatus.
  • FBMC Filter Bank Multi-carrier
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC has lower out-of-band radiation and higher.
  • the typical implementation of FBMC is to use Orthogonal Frequency Division Multiplexing/Offset Quadrature Amplitude Modulation (OFDM/OQAM).
  • OFDM/OQAM transmits pure real or pure imaginary OQAM symbols, which utilize The real-domain orthogonality of the prototype filter enables the orthogonality of the transmitted signal in the frequency and time domains.
  • OFDM/OQAM can achieve better transmission performance in the fading channel without increasing the cyclic prefix, and improve the system throughput.
  • Multi-antenna transmit diversity technology can effectively combat channel fading and improve the reliability of communication systems.
  • space-time/space-frequency block code (STBC/SFBC) based on Alamouti coding is a classic multi-antenna transmit diversity scheme, which can effectively combat channel fading and improve the reliability of communication systems.
  • the multi-antenna coding of the scheme is to set the guard interval of the time-frequency region at the edge and the middle of the two data blocks, and each column of data in each data block is called an FBMC symbol, and the area of the guard interval cannot be effectively transmitted.
  • Data used to isolate mutual interference between data blocks in two areas, also known as imaginary interference.
  • the existence of the guard interval introduces a great time-frequency overhead and causes a certain loss of spectral efficiency, while the multi-antenna transmit diversity scheme based on Alamouti coding STBC/SFBC requires a flat channel in a larger time-frequency range.
  • Embodiments of the present invention provide a multi-antenna diversity transmission, multi-antenna diversity receiving method and apparatus for improving spectral efficiency and reducing channel flatness requirements.
  • a multi-antenna diversity transmission method for a communication system including M antennas, where M ⁇ 2, the method includes:
  • the OQAM symbol vector includes L data blocks, and the L is an integer greater than or equal to 1;
  • the generated OQAM symbol vector may be a point-to-point data transmission.
  • the data generated by the OQAM symbol vector in the uplink data transmission is data sent by a single user, and the number L of the L data blocks is equal to 1, the OQAM.
  • the symbol vector may also be a point-to-multipoint data transmission.
  • the data for generating the OQAM symbol vector in the downlink multi-antenna data transmission includes the expected reception data of a plurality of users, and the OQAM symbol vector includes each of the L data blocks. Data blocks can be used to represent a user's desired receipt of data.
  • L data blocks may be mapped to multiple subcarriers, and each data block is mapped to at least one subcarrier adjacent to the at least one subcarrier.
  • a fixed interval is maintained between the two subcarriers, which is the filter overlap coefficient K during the filtering process.
  • filtering the mapped OQAM symbol vector means performing a filtering operation on the frequency to eliminate noise and interference included in the mapped OQAM symbol vector, wherein the length of the filter may be KH sampling points.
  • K is the filter overlap coefficient
  • H is the number of frequency domain subcarriers
  • H is greater than or equal to the total number A of L subblocks mapped to all subcarriers on different frequency blocks, that is, A is a useful sub The total number of carriers.
  • the L data blocks included in the OQAM symbol vector are subjected to subcarrier mapping, including:
  • the frequency interval is K+P, which is the filter overlap coefficient at the time of filtering processing, and the P is an integer greater than zero.
  • the delay of the transmission signal of the i+1th antenna of the M antennas is delayed by more than the maximum of the transmission signal of the ith antenna Channel multipath delay.
  • the maximum channel multipath delay can be obtained by channel estimation, so that the M-1 delays can obtain the maximum multi-antenna diversity performance, and the interference can be controlled in a range of better processing and less impact on performance.
  • determining, according to the to-be-transmitted OQAM symbol vector, a transmit signal on the M antennas including:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the OQAM symbol vector when performing the IFFT on the OQAM symbol vector to be transmitted, the OQAM symbol vector may be sent to perform KH points IFFT, thereby obtaining the FBMC signal of the first antenna, and the first antenna may be any one of the M antennas.
  • the M-1 delay amounts may be set in advance, and the M-1 delay amounts may be represented not only by discrete sample numbers but also by continuous time sizes. When represented by a discrete number of samples, each component of the M-1 delay amount is a monotonically increasing positive integer; when represented by a continuous time size, each component of the M-1 delay amount is a monotonically increasing positive real number.
  • the M-1 delay amounts may be set based on a plurality of parameters such as the number of transmit antennas, channel multipath delay, and acceptable interference level.
  • the misalignment of the FBMC signals of the M antennas respectively refers to the KH point data ratio corresponding to the nth FBMC symbol in the FBMC signal of the antenna for the FBMC signal of any of the FBMC signals of the M antennas.
  • the KH point data corresponding to the n-1th FBMC symbol is delayed by H/2 point, that is, all the FBMC symbols in the FBMC signal of the antenna are sequentially shifted and then superimposed, thereby obtaining the transmission signal of the antenna.
  • determining, according to the to-be-transmitted OQAM symbol vector, a transmit signal on the M antennas including:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the to-be-transformed signal on the first antenna is separately performed based on the M-1 delay amounts Cycling, obtaining signals to be converted of the antennas other than the first antenna among the M antennas, including:
  • the at least one of the M-1 delays includes at least two of the plurality of delay components The delay components are different from each other.
  • L data blocks may be data allocated to L different users, the L users The maximum channel multipath delay may be different. Therefore, in order to obtain better performance, different delay components may be used on L data blocks according to the channel characteristics of the user, that is, at least M-1 delay amounts. At least two of the plurality of delay components included in one delay amount are different from each other. Optionally, each of the plurality of delay components included in each of the M-1 delay amounts is different from each other.
  • the other antennas outside are different in M-1 delay amounts with respect to the first antenna.
  • a multi-antenna diversity receiving method comprising:
  • the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ the j ⁇ N-1;
  • the time domain symbol of the extracted j+1th signal is The time domain symbol of the extracted jth signal is among them, with Are vectors of length KH, and KH point data ratio The KH point data is delayed by H/2 points.
  • the receiving end when performing subcarrier inverse mapping, if the downlink signal is transmitted, the receiving end only needs to extract the data on the subcarriers scheduled for itself, and does not need to perform subsequent processing on the data on all subcarriers. If it is an uplink signal transmission, the receiving end needs to extract data on all useful subcarriers for subsequent processing.
  • performing equalization processing, filtering processing, and subcarrier inverse mapping on the to-be-processed symbol includes:
  • the difference between the two different processing orders is that the KH data needs to be equalized at the first time, and the H data needs to be equalized at the end.
  • a multi-antenna diversity transmitting apparatus for a communication system including M antennas, wherein the M ⁇ 2, the apparatus includes:
  • a generating unit configured to generate an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, where L is an integer greater than or equal to 1;
  • a processing unit configured to perform subcarrier mapping and filtering processing on the L data blocks included in the OQAM symbol vector, to obtain an OQAM symbol vector to be sent;
  • a determining unit configured to determine, according to the to-be-transmitted OQAM symbol vector, a transmit signal of the M antennas, so that a transmit signal of an i+1th antenna of the M antennas exists with respect to a transmit signal of an i-th antenna Delay, 1 ⁇ the i ⁇ M-1;
  • a sending unit configured to send a transmit signal of the M antennas.
  • the processing unit is specifically configured to:
  • the frequency interval is K+P, which is the filter overlap coefficient at the time of filtering processing, and the P is an integer greater than zero.
  • the delay of the transmission signal of the i+1th antenna of the M antennas is delayed by more than the maximum of the transmission signal of the ith antenna Channel multipath delay.
  • the determining unit is specifically configured to:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the determining The yuan is specifically used for:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the determining unit is further configured to:
  • the at least one of the M-1 delay amounts includes at least two of the plurality of delay components The delay components are different from each other.
  • the other antennas outside are different in M-1 delay amounts with respect to the first antenna.
  • a multi-antenna diversity receiving apparatus comprising:
  • An extracting unit configured to extract a time domain symbol of the received signal, the received signal includes N signals, and the j+1th signal has a delay relative to the jth signal, 1 ⁇ the j ⁇ N-1;
  • a transform unit configured to perform fast Fourier transform on the time domain symbol to obtain a symbol to be processed
  • a processing unit configured to perform equalization processing, filtering processing, and sub-processing on the to-be-processed symbol
  • the carrier inverse mapping is performed to obtain an OQAM symbol vector, wherein the to-be-processed symbol is equalized such that the j+1th signal has no delay with respect to the jth signal, 1 ⁇ j ⁇ N-1.
  • the processing unit is specifically configured to:
  • a multi-antenna diversity transmitting device comprising a processor and a memory, the memory for storing code and data, the processor being operable to execute code in the memory, the processor for The multi-antenna diversity transmission method of any one of the above-mentioned first aspect to the seventh possible implementation of the first aspect.
  • a multi-antenna diversity receiving device comprising a processor and a memory, the memory for storing code and data, the processor being operable to execute code in the memory, the processor for The multi-antenna diversity receiving method according to any one of the above-mentioned second aspect to the first possible implementation of the second aspect.
  • a multi-antenna diversity system comprising the multi-antenna diversity transmitting device of the fifth aspect, and the multi-antenna diversity receiving device of the sixth aspect.
  • the multi-antenna diversity transmission and multi-antenna diversity receiving method and apparatus provided by the embodiments of the present invention generate an OQAM symbol vector and perform subcarrier mapping and filtering processing on L data blocks included in the OQAM symbol vector to obtain an OQAM symbol to be transmitted.
  • FIG. 1 is a system architecture diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a multi-antenna diversity transmitting method according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a transmit signal of an antenna according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a method for receiving multiple antenna diversity according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a multi-antenna diversity transmitting apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a multi-antenna diversity receiving apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a multi-antenna diversity transmitting apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a multi-antenna diversity receiving apparatus according to an embodiment of the present invention.
  • the system architecture of the communication system to which the embodiment of the present invention is applied is as shown in FIG. 1.
  • the communication system includes a source 101, a transmitting device 102, a channel 103, a receiving device 104, and a sink 105.
  • the source 101 and the transmitting device 102 can be Referring collectively to the transmitting end, the receiving device 104 and the sink 105 can be collectively referred to as a receiving end.
  • the source 101 refers to an information source, which may also be referred to as a sending terminal, and converts the message to be transmitted into an original signal.
  • a terminal such as a mobile phone or a computer used by the user may be referred to as a source
  • the message to be transmitted may be For text, voice, picture, etc.
  • the source 101 converts the messages to be transmitted into original signals, which are signals that are not modulated, that is, the original signals are not spectrally shifted and transformed.
  • the basic function of the transmitting device 102 is to match the source and the channel, that is, to convert the original generated by the source into a signal suitable for transmission in the channel, and the transmitting device 102 can transmit the signal using one or more antennas.
  • the channel 103 refers to a channel for signal transmission, and the channel 103 can be a wired channel or It is a wireless channel, the wired channel can be a bright line, a cable or an optical fiber, and the wireless channel can be a free space.
  • the signal is accompanied by noise during channel transmission, which refers to all noise in the channel and a collection of noise scattered elsewhere in the communication system.
  • the function of the receiving device 104 is opposite to that of the transmitting device 102, that is, demodulation, decoding, decoding, etc., which can recover the corresponding original signal from the received signal with noise, wherein the receiving device 104 can adopt one or more
  • the antenna receives the signal.
  • the sink 105 refers to the recipient, which may also be called a receiving terminal, which converts the restored original signal into a corresponding message, such as the mobile phone restores the signal transmitted by the other party to the corresponding text, voice or picture.
  • the method includes the following steps. .
  • Step 201 Generate an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, and L is an integer greater than or equal to 1.
  • the generated OQAM symbol vector may be a point-to-point data transmission.
  • the data generated by the OQAM symbol vector in the uplink data transmission is data sent by a single user, and the number L of the L data blocks is equal to 1, the OQAM.
  • the symbol vector may also be a point-to-multipoint data transmission.
  • the data for generating the OQAM symbol vector in the downlink multi-antenna data transmission includes the expected reception data of a plurality of users, and the OQAM symbol vector includes each of the L data blocks. Data blocks can be used to represent a user's desired receipt of data.
  • Step 202 Perform subcarrier mapping and filtering processing on the L data blocks included in the OQAM symbol vector to obtain an OQAM symbol vector to be transmitted.
  • L data blocks may be mapped to multiple subcarriers, and each data block is mapped to at least one subcarrier, and adjacent to the at least one subcarrier A fixed interval is maintained between the two subcarriers, which is the filter overlap coefficient K during the filtering process.
  • each of the L data blocks may be mapped to a different frequency block, and the previous frequency block in the adjacent frequency block
  • the frequency interval between the last subcarrier and the first subcarrier of the latter frequency block is K+P, where K is the filter overlap coefficient at the time of filtering processing, and P is an integer greater than zero.
  • one of the L data blocks is mapped to the qth frequency block, and the adjacent two subcarriers of the at least one subcarrier mapped by the data block are respectively a1 and a2, and if K is 8, the two sub-blocks K-1 zeros are inserted between carriers a1 and a2, that is, 7 zeros are inserted between a1 and a2; if the last subcarrier in the qth frequency block is b1, in the q+1th frequency block The first subcarrier is b2.
  • P is 4
  • K+P-1 0s are inserted between subcarrier b1 and subcarrier b2, that is, 11 zeros are inserted between b1 and b2.
  • filtering the mapped OQAM symbol vector means performing a filtering operation on the frequency to eliminate noise and interference included in the mapped OQAM symbol vector, wherein the length of the filter may be KH sampling points.
  • K is the filter overlap coefficient
  • H is the number of frequency domain subcarriers
  • H is greater than or equal to the total number A of L subblocks mapped to all subcarriers on different frequency blocks, that is, A is a useful subcarrier. total.
  • the mapped OQAM symbol vector and the frequency response of the filter may be cyclically convoluted to obtain an OQAM symbol vector to be transmitted, and the specific method may refer to Related technologies are not described in this embodiment of the present invention.
  • Step 203 Determine, according to the OQAM symbol vector to be transmitted, the transmission signals of the M antennas, so that the transmission signal of the i+1th antenna of the M antennas is delayed relative to the transmission signal of the ith antenna, 1 ⁇ the i ⁇ M-1.
  • determining the transmission signals of the M antennas may be implemented by two different methods, so that the transmission signals of the i+1th antenna of the M antennas are transmitted relative to the ith antenna. There is a delay in the signal, 1 ⁇ i ⁇ M-1, as described below.
  • the first method based on the OQAM symbol vector to be transmitted and determining the emission signal of the M antennas can be divided into four steps: (a)-(d):
  • the OQAM symbol vector when performing the IFFT on the OQAM symbol vector to be transmitted, the OQAM symbol vector may be sent to perform KH points IFFT, thereby obtaining the FBMC signal of the first antenna, and the first antenna may be any one of the M antennas.
  • the M-1 delay amounts of the other antennas other than the first antenna are different from the first antenna, and the M-1 delay amounts may be set in advance, and the M-1 delay amounts are not only It can also be represented by the number of discrete samples, or by the continuous time size. When represented by a discrete number of samples, each component of the M-1 delay amount is a monotonically increasing positive integer; when represented by a continuous time size, each component of the M-1 delay amount is a monotonically increasing positive real number. For example, by using discrete sample numbers, the M-1 delays of the antennas other than the first antenna and the first antenna may be D 1 , D 2 , ..., D M-1 , M, respectively. - A difference in the amount of delay means that each of the delay amounts in D 1 , D 2 , ..., D M-1 is different.
  • the M-1 delays may be set based on a plurality of parameters, such as the number of the transmitting antennas, the channel multipath delay, and the acceptable interference level, which are not limited in this embodiment of the present invention.
  • the delay of the transmission signal of the i+1th antenna of the M antennas relative to the transmission signal of the ith antenna is greater than the maximum channel multipath delay, that is, the relative delay amount of the M antennas. 1 , D 2 -D 1 ,..., D M-1 -D M-2 is greater than the maximum channel multipath delay that can be resolved, and the maximum channel multipath delay can be obtained by channel estimation, so that the M-1 delay amount
  • the maximum multi-antenna diversity performance can be obtained, and the interference can be controlled in a range of better processing and less impact on performance.
  • the FBMC signal of the first antenna is The delay amount of the jth antenna relative to the first antenna is D j , wherein, 1 ⁇ j ⁇ M-1, the FBMC signal of the first antenna is cyclically shifted based on the delay amount D j to obtain the jth antenna FBMC signal is
  • the KH point data corresponding to the nth FBMC symbol in the FBMC signal of the antenna is delayed from the KH point data corresponding to the n-1th FBMC symbol.
  • H/2 point that is, the FBMC of the antenna All the FBMC symbols in the signal are misaligned and then superimposed to obtain the transmitted signal of the antenna.
  • the FBMC symbol 11 and the FBMC symbol 12 in the FBMC signal of the first antenna 1 and the FBMC symbol 21 and the FBMC symbol 22 in the FBMC signal of the second antenna 2 are taken as an example, wherein the first antenna 1
  • the delay amount between the FBMC signal and the FBMC signal of the second antenna 2 is D 1
  • the reception window of the FBMC symbol 11 and the FBMC symbol 21 is a rectangle 3
  • the dotted signal portion 4 in the figure is a cyclic shift of the FBMC symbol 21 In part, this part of the signal is cyclically shifted to the front of the FBMC symbol 21, that is, the dotted line portion 5 in the figure, where t is time.
  • the second method based on the OQAM symbol vector to be transmitted and determining the transmission signals of the M antennas can be divided into five steps of (1)-(5):
  • the signal to be transformed on the first antenna is cyclically shifted according to the M-1 delay amounts, and the to-be-transformed signals of the antennas other than the first antenna among the M antennas may be obtained: based on the M- 1 delay amount, determining M-1 phase rotation amounts of the antennas other than the first antenna relative to the first antenna among the M antennas; and to be transformed on the first antenna respectively based on the M-1 phase rotation amounts
  • the signal is phase-rotated to obtain signals to be converted of antennas other than the first antenna among the M antennas.
  • L data blocks may be data allocated to L different users, and the maximum channel multipath delay of the L users may be different, in order to obtain better performance, according to the channel characteristics of the user
  • Different delay components may be used on the L data blocks, that is, at least two of the plurality of delay components included in at least one of the M-1 delay amounts are different from each other.
  • the delay amount includes L delay components, if there are x different delay components among the L delay components, where x ⁇ L, the x Different delay components correspond to L data blocks, and any one of the x delay components
  • Each of the L delay components is different, and the specific number of the x different delay components may be determined according to the channel resources, which is not limited by the embodiment of the present invention.
  • the delay component corresponding to the 1st data block 1 ⁇ l ⁇ L the signal to be converted of the first antenna is Then the signal to be converted of the jth antenna Signal to be converted by the first antenna
  • Each component is held or multiplied by a corresponding phase rotation amount to determine 1 ⁇ j ⁇ M-1,
  • the length is KH-1, ie The component of unmapped user data in is 0.
  • the corresponding component in the hold remains at zero.
  • the data block 1 corresponds to the first antenna to be converted
  • the component in Where H l is the number of at least one subcarrier after the subcarrier mapping of the data block 1, and the corresponding delay amount of the data block 1 on the jth antenna is Then the phase rotation of the jth antenna relative to the first antenna is The signal to be converted of the jth antenna The component of the corresponding position is Thereby, the signals to be converted of the antennas other than the first antenna among the M antennas are obtained.
  • the FBMC signals of the M antennas are misaligned and superimposed to obtain the transmission signals of the M antennas.
  • steps (1), (4), and (5) are similar to the steps (b), (a), and (d) of the first method, respectively, and will not be described in detail in the embodiments of the present invention;
  • the M-1 delays of the two methods are similar to the M-1 delays of the first method, and will not be further described in the embodiments of the present invention.
  • Step 204 Send a transmission signal of M antennas.
  • the transmitting end may transmit the transmission signals of the M antennas.
  • the multi-antenna diversity transmission method provided by the embodiment of the present invention generates an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, L is an integer greater than or equal to 1, and performs subcarriers on L data blocks included in the OQAM symbol vector.
  • Mapping and filtering processing obtaining an OQAM symbol vector to be transmitted, and determining a transmission signal of the M antennas based on the OQAM symbol vector to be transmitted, so that the transmission signal of the i+1th antenna of the M antennas is relative to the transmission signal of the ith antenna There is a delay, 1 ⁇ i ⁇ M-1, and then, the transmission signals of the M antennas are transmitted, thereby having the advantages of low complexity, no loss of spectral efficiency, low requirement for channel flatness, and the like.
  • FIG. 4 is a schematic diagram of a multi-antenna diversity receiving method according to an embodiment of the present invention.
  • the method is applied to a communication system.
  • the execution body of the method is a receiving end. Referring to FIG. 4, the method includes the following steps.
  • Step 301 Extract a time domain symbol of the received signal, the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ j ⁇ N-1.
  • the transmitting signal After the transmitting end transmits the transmitting signals of the M antennas, the transmitting signal reaches the receiving end through the channel transmission. At this time, the transmitting signal received by the receiving end may be referred to as a receiving signal, and the receiving end extracts the corresponding time domain symbol from the received signal.
  • the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ j ⁇ N-1.
  • the time domain symbol of the extracted j+1th signal is The time domain symbol of the extracted jth signal is among them, with Are vectors of length KH, and KH point data ratio The KH point data is delayed by H/2 points.
  • Step 302 Perform fast Fourier transform on the time domain symbols to obtain symbols to be processed.
  • Step 303 Perform equalization processing, filtering processing, and subcarrier inverse mapping on the symbols to be processed to obtain an OQAM symbol vector, where the symbols to be processed are equalized so that the j+1th signal has no delay with respect to the jth signal. 1 ⁇ the said j ⁇ N-1.
  • the filtering process is a match that matches the filtering process in the transmitting end.
  • it can be implemented by circular convolution, except that the frequency response of the receiver filter is the conjugate of the frequency response of the transmitter filter.
  • the subcarrier inverse mapping corresponds to the transmission terminal carrier mapping. After the subcarrier inverse mapping, the to-be-processed symbol is mapped back to the OQAM symbol receiving signal corresponding to the transmitting end.
  • the receiving end only needs to extract the data on the subcarriers scheduled for itself, and does not need to perform subsequent processing on the data on all the subcarriers. If it is an uplink signal transmission, the receiving end needs to extract data on all useful subcarriers for subsequent processing.
  • the equalization processing, the filtering processing, and the subcarrier inverse mapping of the symbols to be processed may be sequentially processed according to the following two different sequences, that is, the processing symbols are sequentially subjected to equalization processing, filtering processing, and subcarrier inverse mapping; or The processing symbols are subjected to filtering processing, subcarrier inverse mapping, and equalization processing in sequence.
  • the difference is that at most the equalization processing needs to perform equalization processing on the KH data at the first time, and at the end of the equalization processing, only the H data needs to be equalized at most.
  • the multi-antenna diversity receiving method extracts a time domain symbol of a received signal, the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ j ⁇ N -1, performing fast Fourier transform on the time domain symbols to obtain the symbols to be processed, and then performing equalization processing, filtering processing, and subcarrier inverse mapping on the symbols to be processed, to obtain an OQAM symbol vector, wherein the symbols to be processed are equalized
  • the processing is such that there is no delay between the j+1th signal and the jth signal, so that the OQAM symbol vector can be effectively obtained from the received signal, which has the advantages of high speed, high efficiency and the like.
  • FIG. 5 is a multi-antenna diversity transmitting apparatus according to an embodiment of the present invention, applied to a communication system including M antennas, M ⁇ 2, see FIG. 5, the apparatus includes:
  • a generating unit 401 configured to generate an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, where L is an integer greater than or equal to 1;
  • the generated OQAM symbol vector may be a point-to-point data transmission.
  • the data generated by the OQAM symbol vector in the uplink data transmission is data sent by a single user, and the number L of the L data blocks is equal to 1, the OQAM.
  • Symbol vectors can also be point-to-multipoint numbers According to the transmission, for example, the data for generating the OQAM symbol vector in the downlink multi-antenna data transmission includes the expected reception data of the plurality of users, and each of the L data blocks included in the OQAM symbol vector may be used to represent a user. Expect to receive data.
  • the processing unit 402 is configured to perform subcarrier mapping and filtering processing on the L data blocks included in the OQAM symbol vector to obtain an OQAM symbol vector to be sent.
  • L data blocks may be mapped to multiple subcarriers, and each data block is mapped to at least one subcarrier, and adjacent to the at least one subcarrier A fixed interval is maintained between the two subcarriers, which is the filter overlap coefficient K during the filtering process.
  • filtering the mapped OQAM symbol vector means performing a filtering operation on the frequency to eliminate noise and interference included in the mapped OQAM symbol vector, wherein the length of the filter may be KH sampling points.
  • K is the filter overlap coefficient
  • H is the number of frequency domain subcarriers
  • H is greater than or equal to the total number A of L subblocks mapped to all subcarriers on different frequency blocks, that is, A is a useful subcarrier. total.
  • a determining unit 403 configured to determine, according to the to-be-transmitted OQAM symbol vector, a transmit signal of the M antennas, so that a transmit signal of the i+1th antenna of the M antennas is opposite to a transmit signal of the i-th antenna There is a delay, 1 ⁇ the i ⁇ M-1;
  • the sending unit 404 is configured to send the transmit signals of the M antennas.
  • processing unit 402 is specifically configured to:
  • the frequency interval is K+P, which is the filter overlap coefficient at the time of filtering processing, and the P is an integer greater than zero.
  • the transmission signal of the i+1th antenna of the M antennas has a delay delay greater than the maximum channel multipath delay with respect to the transmission signal of the ith antenna.
  • the maximum channel multipath delay can be obtained by channel estimation, so that the M-1 delays can obtain the maximum multi-antenna diversity performance, and the interference can be controlled in a range of better processing and less impact on performance.
  • the determining unit 403 is specifically configured to:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the OQAM symbol vector when performing the IFFT on the OQAM symbol vector to be transmitted, the OQAM symbol vector may be sent to perform KH points IFFT, thereby obtaining the FBMC signal of the first antenna, and the first antenna may be any one of the M antennas.
  • the M-1 delay amounts may be set in advance, and the M-1 delay amounts may be represented not only by discrete sample numbers but also by continuous time sizes. When represented by a discrete number of samples, each component of the M-1 delay amount is a monotonically increasing positive integer; when represented by a continuous time size, each component of the M-1 delay amount is a monotonically increasing positive real number.
  • the M-1 delay amounts may be set based on a plurality of parameters such as the number of transmit antennas, channel multipath delay, and acceptable interference level.
  • the misalignment of the FBMC signals of the M antennas respectively refers to the KH point data ratio corresponding to the nth FBMC symbol in the FBMC signal of the antenna for the FBMC signal of any of the FBMC signals of the M antennas.
  • the KH point data corresponding to the n-1th FBMC symbol is delayed by H/2 point, that is, all the FBMC symbols in the FBMC signal of the antenna are sequentially shifted and then superimposed, thereby obtaining the transmission signal of the antenna.
  • the determining unit 403 is specifically configured to:
  • the FBMC signals of the M antennas are respectively misaligned to obtain a transmission signal of the M antennas.
  • the determining unit 403 is further specifically configured to:
  • At least two of the plurality of delay components included in the M-1 delay amount are different from each other.
  • the L data blocks may be data allocated to L different users, and the maximum channel multipath delay of the L users may be different, in order to obtain better performance, according to the channel characteristics of the user.
  • Different delay components may be used on the L data blocks, that is, at least two of the plurality of delay components included in at least one of the M-1 delay amounts are different from each other.
  • each of the plurality of delay components included in each of the M-1 delay amounts is different from each other.
  • other antennas except the first antenna of the M antennas have different M-1 delay amounts with respect to the first antenna.
  • the multi-antenna diversity transmitting apparatus provided by the embodiment of the present invention generates an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, L is an integer greater than or equal to 1, and performs subcarriers on L data blocks included in the OQAM symbol vector.
  • Mapping and filtering processing obtaining an OQAM symbol vector to be transmitted, and determining a transmission signal of the M antennas based on the OQAM symbol vector to be transmitted, so that the transmission signal of the i+1th antenna of the M antennas is relative to the transmission signal of the ith antenna There is a delay, 1 ⁇ i ⁇ M-1, and then, the transmission signals of the M antennas are transmitted, thereby having the advantages of low complexity, no loss of spectral efficiency, low requirement for channel flatness, and the like.
  • FIG. 6 is a multi-antenna diversity receiving apparatus according to an embodiment of the present invention.
  • the apparatus includes:
  • the extracting unit 501 is configured to extract a time domain symbol of the received signal, the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ the j ⁇ N-1;
  • the time domain symbol of the extracted j+1th signal is The time domain symbol of the extracted jth signal is among them, with Are vectors of length KH, and KH point data ratio The KH point data is delayed by H/2 points.
  • a transform unit 502 configured to perform fast Fourier transform on the time domain symbol to obtain a symbol to be processed
  • the processing unit 503 is configured to perform equalization processing, filtering processing, and subcarrier inverse mapping on the to-be-processed symbol to obtain an OQAM symbol vector, where the to-be-processed symbol is equalized, so that the j+1th There is no delay in the signal relative to the jth signal, 1 ⁇ the j ⁇ N-1.
  • the filtering processing is an operation matching the filtering processing in the transmitting end, or may be implemented by circular convolution, except that the frequency response of the receiving end filter is the frequency response of the transmitting end filter. Conjugation.
  • the subcarrier inverse mapping corresponds to the transmission terminal carrier mapping. After the subcarrier inverse mapping, the to-be-processed symbol is mapped back to the OQAM symbol receiving signal corresponding to the transmitting end.
  • the receiving end only needs to extract the data on the subcarriers scheduled for itself, and does not need to perform subsequent processing on the data on all the subcarriers. If it is an uplink signal transmission, the receiving end needs to extract data on all useful subcarriers for subsequent processing.
  • processing unit 503 is specifically configured to:
  • the difference is that the most need to balance the KH data when performing the equalization processing first. In the end, at the end of the equalization process, at most only H data needs to be equalized.
  • the multi-antenna diversity receiving apparatus extracts a time domain symbol of a received signal, the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ j ⁇ N -1, performing fast Fourier transform on the time domain symbols to obtain the symbols to be processed, and then performing equalization processing, filtering processing, and subcarrier inverse mapping on the symbols to be processed, to obtain an OQAM symbol vector, wherein the symbols to be processed are equalized
  • the processing is such that there is no delay between the j+1th signal and the jth signal, so that the OQAM symbol vector can be effectively obtained from the received signal, which has the advantages of high speed, high efficiency and the like.
  • FIG. 7 is a multi-antenna diversity transmitting device according to an embodiment of the present invention.
  • the device includes a memory 701, a processor 702, a power component 703, an input/output interface 704, a communication component 705, and the like.
  • the multi-antenna diversity transmitting method described in Embodiment 2 above is performed.
  • the structure shown in FIG. 7 is merely illustrative and does not limit the structure of the multi-antenna diversity transmitting device.
  • the multi-antenna diversity transmitting device may further include more or less components than those shown in FIG. 7, or have a different configuration than that shown in FIG.
  • the memory 701 can be used to store data, software programs, and modules; and mainly includes a storage program area and a storage data area, wherein the storage program area can store an operating system, an application required for at least one function, and the like; and the storage data area can be stored according to multiple antennas.
  • the memory may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the processor 702 is a control center of the multi-antenna diversity transmitting device, which connects various parts of the entire device using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 701, and calling stored in the memory 701. The data, performing various functions of the device and processing data, thereby performing overall monitoring of the multi-antenna diversity transmitting device.
  • the processor 702 may include one or more processing units; preferably, the processor 702 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, and For applications, etc., the modem processor primarily handles wireless communications. It can be understood that the above modem processor may not be integrated into the processor 702.
  • the power component 703 is configured to provide power to various components of the multi-antenna diversity transmitting device, and the power component 703 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the multi-antenna diversity transmitting device. .
  • the input/output interface 704 provides an interface between the processor 702 and the peripheral interface module.
  • the peripheral interface module can be a keyboard, a mouse, or the like.
  • Communication component 705 is configured to facilitate wired or wireless communication between the multi-antenna diversity transmitting device and other devices.
  • the multi-antenna diversity transmitting device can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
  • the multi-antenna diversity transmitting device may further include an audio component, a multimedia component, and the like, which are not described herein again.
  • a multi-antenna diversity transmitting apparatus provided by an embodiment of the present invention generates an OQAM symbol vector, where the OQAM symbol vector includes L data blocks, L is an integer greater than or equal to 1, and performs L data blocks included in the OQAM symbol vector.
  • the subcarrier mapping and filtering process obtains an OQAM symbol vector to be transmitted, and determines a transmission signal of the M antennas based on the OQAM symbol vector to be transmitted, so that the transmission signal of the i+1th antenna of the M antennas is relative to the ith antenna There is a delay in the transmitted signal, 1 ⁇ i ⁇ M-1, and then the transmission signals of the M antennas are transmitted, thereby having the advantages of low complexity, no loss of spectral efficiency, low requirement for channel flatness, and the like.
  • FIG. 8 illustrates a multi-antenna diversity receiving device according to an embodiment of the present invention.
  • the device includes a memory 801, a processor 802, a power component 803, an input/output interface 804, a communication component 805, and the like.
  • the processor 802 is configured to perform the multi-antenna diversity receiving method described in Embodiment 3 above.
  • the structure shown in FIG. 8 is merely illustrative, and does not limit the structure of the multi-antenna diversity receiving apparatus.
  • the multi-antenna diversity receiving device may further include more or less components than those shown in FIG. 8, or have a different configuration than that shown in FIG.
  • the memory 801 can be used to store data, software programs, and modules; mainly including stored programs And a storage data area, wherein the storage program area can store an operating system, an application required for at least one function, and the like; the storage data area can store data created according to usage of the multi-antenna diversity transmitting device, and the like.
  • the memory may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • Processor 802 is a control center for a multi-antenna diversity receiving device that connects various portions of the entire multi-antenna diversity receiving device using various interfaces and lines, by running or executing software programs and/or modules stored in memory 801, and invoking storage
  • the data in the memory 801 performs various functions and processing data of the multi-antenna diversity receiving device, thereby performing overall monitoring of the multi-antenna diversity receiving device.
  • the processor 802 may include one or more processing units; preferably, the processor 802 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 802.
  • the power component 803 is configured to provide power to various components of the multi-antenna diversity receiving device, and the power component 803 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the multi-antenna diversity receiving device. .
  • the input/output interface 804 provides an interface between the processor 802 and the peripheral interface module.
  • the peripheral interface module can be a keyboard, a mouse, or the like.
  • the communication component 805 is configured to facilitate wired or wireless communication between the multi-antenna diversity receiving device and other devices.
  • the multi-antenna diversity receiving device can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.
  • the multi-antenna diversity receiving device may further include an audio component, a multimedia component, and the like, which are not described herein again.
  • the multi-antenna diversity receiving apparatus extracts a time domain symbol of a received signal, the received signal includes N signals, and the j+1th signal has a delay with respect to the jth signal, 1 ⁇ j ⁇ N -1, performing fast Fourier transform on the time domain symbols to obtain the symbols to be processed, and then performing equalization processing, filtering processing, and subcarrier inverse mapping on the symbols to be processed, to obtain an OQAM symbol vector, wherein the symbols to be processed are equalized
  • the processing is such that there is no delay between the j+1th signal and the jth signal, so that the OQAM symbol vector can be effectively obtained from the received signal, which has the advantages of high speed, high efficiency and the like.
  • the embodiment of the present invention provides a multi-antenna diversity system, which includes the multi-antenna diversity transmitting device shown in FIG. 7, and the multi-antenna diversity receiving device shown in FIG.
  • the multi-antenna diversity transmitting apparatus generates an OQAM symbol vector and performs subcarrier mapping and filtering processing on the L data blocks included in the OQAM symbol vector to obtain an OQAM symbol vector to be transmitted, based on the OQAM symbol vector to be transmitted.

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  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un procédé et un appareil d'émission et de réception de diversité à plusieurs antennes concernant le domaine technique des communications. Le procédé d'émission de diversité à plusieurs antennes consiste : à générer un vecteur de symbole OQAM, le vecteur de symbole OQAM comprenant L blocs de données, L étant un nombre entier supérieur ou égal à 1 ; à exécuter un traitement de mappage et de filtrage de sous-porteuse sur les L blocs de données compris dans le vecteur de symbole OQAM, pour obtenir un vecteur de symbole OQAM à envoyer ; sur la base du vecteur de symbole OQAM à envoyer, à déterminer des signaux d'émission de M antennes, de telle sorte qu'il existe un retard entre le signal d'émission de la (i+1)ième antenne dans les M antennes et le signal d'émission dans la ième antenne, où 1? i ? M-1 ; à envoyer les signaux d'émission des M antennes.
PCT/CN2016/104144 2015-12-18 2016-10-31 Procédé et appareil d'émission et de réception de diversité à plusieurs antennes WO2017101602A1 (fr)

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