CN106899533A

CN106899533A - Multi-antenna diversity transmitting, multi-antenna diversity method of reseptance and device

Info

Publication number: CN106899533A
Application number: CN201510955852.0A
Authority: CN
Inventors: 屈代明; 李俊; 江涛; 闵雷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2017-06-27
Also published as: WO2017101602A1

Abstract

The embodiment of the present invention provides a kind of multi-antenna diversity transmitting, multi-antenna diversity method of reseptance and device, is related to communication technical field.The multi-antenna diversity launching technique includes：Generation OQAM symbolic vectors, the OQAM symbolic vectors include L data block, and the L is the integer more than or equal to 1；Subcarrier maps and filtering process are carried out to the L data block that the OQAM symbolic vectors include, OQAM symbolic vectors to be sent are obtained；Based on the OQAM symbolic vectors to be sent, the transmission signal of the M antenna is determined so that the transmission signal of i+1 antenna exists relative to i-th transmission signal of antenna and postpones in the M antenna, the 1≤i≤M-1；Send the transmission signal of the M antenna.

Description

Multi-antenna diversity transmitting and receiving method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for multi-antenna diversity transmission and multi-antenna diversity reception.

Background

Filter Bank Multi-carrier (FBMC) is a Multi-carrier modulation technique that has lower out-of-band emissions and higher spectral efficiency relative to Orthogonal Frequency Division Multiplexing (OFDM). A typical implementation of FBMC is to use orthogonal frequency division multiplexing/offset quadrature amplitude modulation (OFDM/OQAM) technology, and unlike OFDM, OFDM/OQAM transmits pure real or pure imaginary OQAM symbols, which use the real-domain orthogonality of prototype filters to achieve orthogonality of the transmitted signals in the frequency and time domains. In addition, due to the good time-frequency local characteristic of the prototype filter, the OFDM/OQAM can achieve better transmission performance in a fading channel on the premise of not adding a cyclic prefix, and the throughput of the system is improved.

The multi-antenna transmission diversity technology can effectively resist channel fading and improve the reliability of a communication system. At present, a space-time/space-frequency block code (STBC/SFBC) based on Alamouti coding is a classic scheme of multi-antenna transmit diversity, which can effectively resist channel fading and improve the reliability of a communication system. In the multi-antenna coding of the scheme, a guard interval of a time-frequency area is set at the edge and the middle of two data blocks, and each column of data in each data block is called as an FBMC symbol, wherein effective data cannot be sent in the area of the guard interval, so as to isolate mutual interference between the data blocks in the two areas, which can also be called as imaginary part interference.

However, the existence of the guard interval introduces a great time-frequency overhead and causes a certain loss of spectral efficiency, and meanwhile, the multi-antenna transmit diversity scheme based on the Alamouti encoded STBC/SFBC requires a large channel flatness in the time-frequency range.

Disclosure of Invention

The embodiment of the invention provides a multi-antenna diversity transmitting method, a multi-antenna diversity receiving method and a device, which are used for improving the frequency spectrum efficiency and reducing the requirement on channel flatness.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a multi-antenna diversity transmission method is provided, which is applied to a communication system including M antennas, where M ≧ 2, the method including:

generating an OQAM symbol vector, wherein the OQAM symbol vector comprises L data blocks, and L is an integer greater than or equal to 1;

performing subcarrier mapping and filtering processing on L data blocks included in the OQAM symbol vector to obtain an OQAM symbol vector to be sent;

determining the transmitting signals of the M antennas based on the OQAM symbol vector to be transmitted, so that the transmitting signal of the (i + 1) th antenna in the M antennas has delay relative to the transmitting signal of the ith antenna, and i is more than or equal to 1 and less than or equal to M-1;

and transmitting the transmitting signals of the M antennas.

The generated OQAM symbol vector may be data transmitted point-to-point, for example, the data generated by the OQAM symbol vector in uplink data transmission is data transmitted by a single user, where the number L of L data blocks is equal to 1, the OQAM symbol vector may also be data transmitted point-to-multipoint, for example, the data generated by the OQAM symbol vector in downlink multi-antenna data transmission includes expected received data of multiple users, and each data block in the L data blocks included by the OQAM symbol vector may be used to represent the expected received data of one user.

In addition, when subcarrier mapping is performed on L data blocks included in the OQAM symbol vector, the L data blocks may be mapped to multiple subcarriers, and each data block is mapped to at least one subcarrier, where a fixed interval is maintained between two adjacent subcarriers in the at least one subcarrier, and the fixed interval is a filter overlap coefficient K during filtering processing.

The filtering processing on the mapped OQAM symbol vectors refers to performing filtering operation on frequency to eliminate noise and interference contained in the mapped OQAM symbol vectors, where the length of the filter may be KH sampling points, K is a filter overlapping coefficient, H is the number of frequency domain subcarriers, and H is greater than or equal to L data blocks, which are respectively mapped to the total number a of all subcarriers on different frequency blocks, that is, a is the total number of useful subcarriers.

With reference to the first aspect, in a first possible implementation manner of the first aspect, performing subcarrier mapping on L data blocks included in the OQAM symbol vector includes:

and mapping each data block in the L data blocks to different frequency blocks respectively, wherein the frequency interval between the last subcarrier of a previous frequency block and the first subcarrier of a next frequency block in adjacent frequency blocks is K + P, K is a filter overlapping coefficient during filtering processing, and P is an integer greater than zero.

With reference to the first aspect, in a second possible implementation manner of the first aspect, a delay amount of a transmission signal of an i +1 th antenna of the M antennas with respect to a transmission signal of an ith antenna is greater than a maximum channel multipath delay.

The maximum channel multipath delay can be obtained by channel estimation, so that the maximum multi-antenna diversity performance can be obtained by the M-1 delay amounts, and the interference can be controlled in a range with better processing and smaller influence on the performance.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, based on the OQAM symbol vector to be transmitted, transmission signals on the M antennas includes:

performing Inverse Fast Fourier Transform (IFFT) on the OQAM symbol vector to be transmitted to obtain an FBMC signal of a first antenna;

obtaining M-1 delay amounts of other antennas except a first antenna relative to the first antenna in the M antennas;

respectively performing cyclic shift on the FBMC signals of the first antenna based on the M-1 delay quantities to obtain FBMC signals of other antennas except the first antenna in the M antennas;

and performing dislocation superposition on the FBMC signals of the M antennas respectively to obtain the transmitting signals of the M antennas.

When IFFT is performed on the OQAM symbol vector to be transmitted, KH-point IFFT may be performed on the OQAM symbol vector to be transmitted, so as to obtain an FBMC signal of the first antenna, and the first antenna may be any one of M antennas.

In addition, the M-1 delay amounts can be set in advance, and the M-1 delay amounts can be represented by discrete sampling numbers or continuous time sizes. When expressed by discrete sampling numbers, each component of the M-1 delay amounts is a positive integer which monotonically increases; each component of the M-1 delay amounts is a monotonically increasing positive real number when represented by a continuous time scale. The M-1 delay amounts may be set based on a number of parameters such as the number of transmit antennas, channel multipath delays, and acceptable interference levels.

The staggered superposition of the FBMC signals of the M antennas means that KH point data corresponding to the nth FBMC symbol in the FBMC signals of the antennas is delayed by H/2 point from KH point data corresponding to the n-1 FBMC symbol for the FBMC signals of any antenna in the FBMC signals of the M antennas, that is, all the FBMC symbols in the FBMC signals of the antennas are sequentially staggered and then superposed, so that the transmitting signals of the antennas are obtained.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the determining, based on the OQAM symbol vector to be transmitted, transmission signals on the M antennas includes:

determining the OQAM symbol vector to be transmitted as a signal to be converted of a first antenna;

respectively carrying out cyclic shift on the signals to be converted on the first antenna based on the M-1 delay quantities to obtain the signals to be converted of other antennas except the first antenna in the M antennas;

performing inverse fast Fourier transform on the signals to be transformed on the M antennas to obtain FBMC signals of the M antennas;

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, based on the M-1 delay amounts, performing cyclic shift on the signal to be transformed on the first antenna, respectively, to obtain the signal to be transformed of the other antennas except the first antenna among the M antennas, includes:

determining M-1 phase rotation amounts of the other antennas except the first antenna relative to the first antenna based on the M-1 delay amounts;

and respectively carrying out phase rotation on the signals to be converted on the first antenna based on the M-1 phase rotation amount to obtain the signals to be converted of the other antennas except the first antenna in the M antennas.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, at least two delay components of the plurality of delay components included in at least one of the M-1 delay amounts are different from each other.

Since L data blocks may be data allocated to L different users, and the maximum channel multipath delays of the L users may be different, different delay components may be used on the L data blocks according to the channel characteristics of the users, that is, at least two delay components among a plurality of delay components included in at least one of the M-1 delay amounts are different from each other, in order to obtain better performance. Optionally, each of the plurality of delay components included in each of the M-1 delay amounts is different from each other.

With reference to the third possible implementation manner of the first aspect or the fourth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, M-1 delay amounts of antennas other than the first antenna among the M antennas are different with respect to the first antenna.

In a second aspect, a multiple antenna diversity reception method is provided, the method including:

extracting a time domain symbol of a received signal, wherein the received signal comprises N signals, the j +1 th signal has delay relative to the jth signal, and j is more than or equal to 1 and less than or equal to N-1;

performing fast Fourier transform on the time domain symbol to obtain a symbol to be processed;

and carrying out equalization processing, filtering processing and subcarrier inverse mapping on the symbol to be processed to obtain an OQAM symbol vector, wherein the symbol to be processed is subjected to equalization processing, so that no delay exists between the j +1 th signal and the jth signal, and j is more than or equal to 1 and less than or equal to N-1.

Wherein the time domain symbol of the j +1 th signal is extractedThe time domain symbol of the j signal is extracted asWherein,andare all vectors of length KH, andKH point data ratio ofThe KH point data of (1) is delayed by H/2 points.

In addition, when the sub-carrier inverse mapping is performed, if the downlink signal transmission is performed, the receiving end only needs to extract the data scheduled to the sub-carrier of the receiving end, and the subsequent processing of the data on all the sub-carriers is not needed. If the uplink signal transmission is performed, the receiving end needs to extract data on all useful subcarriers for subsequent processing.

With reference to the second aspect, in a first possible implementation manner of the second aspect, performing equalization processing, filtering processing, and subcarrier inverse mapping on the to-be-processed symbol includes:

carrying out equalization processing, filtering processing and subcarrier inverse mapping on the symbols to be processed in sequence;

or,

and sequentially carrying out filtering processing, subcarrier inverse mapping and equalization processing on the symbols to be processed.

The two different processing sequences are different in that the first equalization processing is performed by equalizing KH data at most, and the last equalization processing is performed by equalizing H data at most.

In a third aspect, a multi-antenna diversity transmitting apparatus is provided, which is applied to a communication system including M antennas, where M ≧ 2, the apparatus includes:

the device comprises a generating unit, a calculating unit and a processing unit, wherein the generating unit is used for generating an OQAM symbol vector which comprises L data blocks, and L is an integer which is greater than or equal to 1;

the processing unit is used for carrying out subcarrier mapping and filtering processing on the L data blocks included by the OQAM symbol vector to obtain an OQAM symbol vector to be sent;

a determining unit, configured to determine, based on the to-be-transmitted OQAM symbol vector, transmission signals of the M antennas, so that a transmission signal of an i +1 th antenna in the M antennas has a delay with respect to a transmission signal of an i-th antenna, where i is greater than or equal to 1 and is less than or equal to M-1;

and the sending unit is used for sending the transmitting signals of the M antennas.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the processing unit is specifically configured to:

With reference to the third aspect, in a second possible implementation manner of the third aspect, a delay amount of a transmission signal of an i +1 th antenna of the M antennas with respect to a transmission signal of an ith antenna is greater than a maximum channel multipath delay.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the determining unit is specifically configured to:

performing fast Fourier inverse transformation on the OQAM symbol vector to be transmitted to obtain an FBMC signal of a first antenna;

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the determining unit is specifically configured to:

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the determining unit is further specifically configured to:

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, at least two delay components of the plurality of delay components included in at least one of the M-1 delay amounts are different from each other.

With reference to the third possible implementation manner of the third aspect or the fourth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, M-1 delay amounts of antennas other than the first antenna among the M antennas are different with respect to the first antenna.

In a fourth aspect, there is provided a multiple antenna diversity receiving apparatus, the apparatus comprising:

the device comprises an extraction unit, a detection unit and a processing unit, wherein the extraction unit is used for extracting a time domain symbol of a received signal, the received signal comprises N signals, the j +1 th signal has delay relative to the j th signal, and j is more than or equal to 1 and less than or equal to N-1;

the transformation unit is used for carrying out fast Fourier transformation on the time domain symbol to obtain a symbol to be processed;

and the processing unit is used for carrying out equalization processing, filtering processing and subcarrier inverse mapping on the symbol to be processed to obtain an OQAM symbol vector, wherein the symbol to be processed is subjected to equalization processing, so that the j +1 th signal has no delay relative to the j th signal, and j is more than or equal to 1 and less than or equal to N-1.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the processing unit is specifically configured to:

or,

In a fifth aspect, a multi-antenna diversity transmitting apparatus is provided, the apparatus includes a processor and a memory, the memory is used for storing codes and data, the processor is capable of executing the codes in the memory, and the processor is used for executing the multi-antenna diversity transmitting method in any one of the first aspect to the seventh possible implementation manner of the first aspect.

A sixth aspect provides a multiple antenna diversity receiving apparatus, which includes a processor and a memory, the memory being configured to store codes and data, the processor being operable to execute the codes in the memory, and the processor being configured to execute the multiple antenna diversity receiving method according to any one of the second to the first possible implementation manners of the second aspect.

In a seventh aspect, there is provided a multiple antenna diversity system, comprising the multiple antenna diversity transmitting apparatus of the fifth aspect and the multiple antenna diversity receiving apparatus of the sixth aspect.

The method and the device for receiving the multi-antenna diversity transmission and the multi-antenna diversity receive provided by the embodiment of the invention have the advantages that the OQAM symbol vector is generated, the subcarrier mapping and filtering processing is carried out on L data blocks included by the OQAM symbol vector to obtain the OQAM symbol vector to be transmitted, the transmitting signals of M antennas are determined based on the OQAM symbol vector to be transmitted, so that the transmitting signal of the (i + 1) th antenna in the M antennas has delay relative to the transmitting signal of the (i) th antenna, i is more than or equal to 1 and less than or equal to M-1, the transmitting signals of the M antennas are transmitted, and the receiving signals are subjected to time domain symbol extraction, fast Fourier transform, a series of processing and the like through the receiving end, so that the OQAM symbol vector can be effectively obtained from the receiving signals, and the method and the device have the advantages of low complexity, no loss of spectral efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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 transmission method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a transmission signal of an antenna according to an embodiment of the present invention;

fig. 4 is a flowchart of a multi-antenna diversity receiving method 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.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 1 shows a system architecture of a communication system applied in an embodiment of the present invention, where the communication system includes an information source 101, a transmitting device 102, a channel 103, a receiving device 104, and a signal sink 105, where the information source 101 and the transmitting device 102 may be collectively referred to as a transmitting end, and the receiving device 104 and the signal sink 105 may be collectively referred to as a receiving end.

The source 101 is an information source, which may also be called a sending terminal, and converts a message to be transmitted into an original signal, for example, terminals such as a mobile phone and a computer used by a user may be called the source, the message to be transmitted may be a text, a voice, a picture, etc., the source 101 converts the message to be transmitted into the original signal, and the original signal refers to a signal that is not modulated, that is, the original signal is not subjected to spectrum shifting and converting. The basic function of the transmitting device 102 is to match the source to the channel, i.e. to convert the original signal generated by the source into a signal suitable for transmission in the channel, and the transmitting device 102 may use one or more antennas for transmission of the signal.

The channel 103 refers to a channel for signal transmission, and the channel 103 may be a wired channel, which may be a clear wire, a cable, or an optical fiber, or a wireless channel, which may be a free space. During transmission of a channel, a signal is accompanied by noise, which refers to the aggregate of all noise in the channel and noise scattered elsewhere in the communication system.

The receiving device 104, which is functionally opposite to the transmitting device 102, performs demodulation, decoding, etc., and recovers the corresponding original signal from the noisy received signal, wherein the receiving device 104 may employ one or more antennas for signal reception. The signal sink 105 is a receiver, which may also be called a receiving terminal, and converts the restored original signal into a corresponding message, for example, a mobile phone restores a signal from the other party into a corresponding text, voice, or picture.

Example two

Fig. 2 is a diagram of a multi-antenna diversity transmission method according to an embodiment of the present invention, applied to a communication system including M antennas, where M ≧ 2, the main execution entity of the method is a transmitting end, and referring to fig. 2, the method includes the following steps.

Step 201: and generating an OQAM symbol vector which comprises L data blocks, wherein L is an integer which is more than or equal to 1.

It should be noted that, a specific method for generating an OQAM symbol may refer to related art, and this is not described in the embodiment of the present invention.

Step 202: and carrying out subcarrier mapping and filtering processing on L data blocks included by the OQAM symbol vector to obtain the OQAM symbol vector to be transmitted.

When performing subcarrier mapping on L data blocks included in an OQAM symbol vector, the L data blocks may be mapped to multiple subcarriers, and each data block is mapped to at least one subcarrier, where a fixed interval is maintained between two adjacent subcarriers in the at least one subcarrier, and the fixed interval is a filter overlap coefficient K during filtering processing.

Further, when the L data blocks are subjected to subcarrier mapping, each of the L data blocks may be mapped to a different frequency block, and a frequency interval between a last subcarrier of a previous frequency block and a first subcarrier of a subsequent frequency block in adjacent frequency blocks is K + P, where K is a filter overlap coefficient during filtering, and P is an integer greater than zero.

For example, one data block of the L data blocks is mapped to the q-th frequency block, where two adjacent subcarriers of at least one subcarrier mapped by the data block are a1 and a2, respectively, and if K is 8, K-1 0 is inserted between two subcarriers a1 and a2, that is, 70 are inserted between a1 and a 2; if the last subcarrier in the q-th frequency block is b1 and the first subcarrier in the q + 1-th frequency block is b2, when P is 4, K + P-1 0 s are inserted between the subcarrier b1 and the subcarrier b2, that is, 11 0 s are inserted between b1 and b 2.

In addition, performing filtering processing on the mapped OQAM symbol vectors refers to performing filtering operation on frequency to eliminate noise and interference contained in the mapped OQAM symbol vectors, where the length of the filter may be KH sampling points, K is a filter overlapping coefficient, H is the number of frequency domain subcarriers, and H is greater than or equal to the total number a of all subcarriers that L data blocks are respectively mapped to different frequency blocks, that is, a is the total number of useful subcarriers.

It should be noted that, when filtering the mapped OQAM symbol vectors, the mapped OQAM symbol vectors and the frequency response of the filter may be circularly convolved, so as to obtain the OQAM symbol vectors to be transmitted.

Step 203: determining the transmitting signals of M antennas based on an OQAM symbol vector to be transmitted, so that the transmitting signal of the (i + 1) th antenna in the M antennas has delay relative to the transmitting signal of the ith antenna, and i is more than or equal to 1 and less than or equal to M-1.

Determining the transmitting signals of the M antennas based on the OQAM symbol vectors to be transmitted can be achieved by the following two different methods, so that the transmitting signal of the (i + 1) th antenna in the M antennas has a delay relative to the transmitting signal of the ith antenna, and i is greater than or equal to 1 and less than or equal to M-1, as described below.

The first method for determining the transmitted signal acid mist of M antennas based on the OQAM symbol vector to be transmitted can be divided into four steps (a) - (d):

(a) and performing Inverse Fast Fourier Transform (IFFT) on the OQAM symbol vector to be transmitted to obtain an FBMC signal of the first antenna.

(b) And obtaining M-1 delay amounts of other antennas except the first antenna relative to the first antenna in the M antennas.

The M-1 delay amounts of the antennas except the first antenna are different from each other, the M-1 delay amounts can be set in advance, and the M-1 delay amounts can be represented by discrete sampling numbers or continuous time sizes. When expressed by discrete sampling numbers, each component of the M-1 delay amounts is a positive integer which monotonically increases; each component of the M-1 delay amounts is a monotonically increasing positive real number when represented by a continuous time scale. For example, the M-1 delay amounts of the antennas except the first antenna relative to the first antenna in the M antennas can be respectively D by using discrete sampling numbers₁、D₂、…、D_M-1M-1 differences in retardation means D₁、D₂、…、D_M-1Each of the delay amounts is different.

In addition, the M-1 delay amounts may be set based on a plurality of parameters such as the number of transmitting antennas, the channel multipath delay, and the acceptable interference degree, which is not limited in the embodiment of the present invention.

Further, the delay of the transmission signal of the (i + 1) th antenna in the M antennas relative to the transmission signal of the ith antenna is larger than the maximum channel multipath delay, that is, the relative delay D of the M antennas₁、D₂-D₁、…、D_M-1-D_M-2The maximum channel multipath delay is obtained by channel estimation, so that the maximum multi-antenna diversity performance can be obtained by the M-1 delay amounts, and the interference can be controlled in a range with better processing and smaller influence on the performance.

(c) And respectively carrying out cyclic shift on the FBMC signals of the first antenna based on the M-1 delay amounts to obtain the FBMC signals of the antennas except the first antenna in the M antennas.

Specifically, if the FBMC signal of the first antenna isThe delay amount of the jth antenna relative to the first antenna is D_jWherein j is not less than 1 and not more than M-1, based on the delay amount D_jCircularly shifting the FBMC signal of the first antenna to obtain the FBMC signal of the jth antenna as

(d) And performing dislocation superposition on the FBMC signals of the M antennas to obtain the transmitting signals of the M antennas.

Specifically, for the FBMC signal of any one of the FBMC signals of the M antennas, KH point data corresponding to the nth FBMC symbol in the FBMC signal of the antenna is delayed by H/2 point from KH point data corresponding to the n-1 th FBMC symbol, that is, all FBMC symbols in the FBMC signal of the antenna are sequentially staggered and then superposed, so as to obtain the transmission signal of the antenna.

For example, referring to fig. 3, the FBMC symbol 11 and FBMC symbol 12 in the FBMC signal of the first antenna 1 and the FBMC symbol 21 and FBMC symbol 22 in the FBMC signal of the second antenna 2 are taken as examples, where the delay amount between the FBMC signal of the first antenna 1 and the FBMC signal of the second antenna 2 is D₁The receiving windows of FBMC symbol 11 and FBMC symbol 21 are rectangles 3, and the dashed signal portion 4 in the figure is the portion of FBMC symbol 21 that is cyclically shifted, and this portion of the signal is cyclically shifted to the front of FBMC symbol 21, i.e. the dashed portion 5 in the figure, where t is time.

The second method for determining the transmission signals of M antennas based on the OQAM symbol vector to be transmitted can be divided into (1) to (5):

(1) acquiring M-1 delay amounts of other antennas except the first antenna relative to the first antenna in the M antennas;

(2) determining an OQAM symbol vector to be transmitted as a signal to be converted of a first antenna;

(3) respectively carrying out cyclic shift on the signals to be converted of the first antenna based on the M-1 delay quantities to obtain the signals to be converted of other antennas except the first antenna in the M antennas;

wherein, based on the M-1 delay amounts, performing cyclic shift on the to-be-transformed signal on the first antenna, respectively, and obtaining the to-be-transformed signals of the antennas other than the first antenna among the M antennas may include: determining M-1 phase rotation amounts of the antennas other than the first antenna among the M antennas with respect to the first antenna based on the M-1 delay amounts; and respectively carrying out phase rotation on the signals to be converted on the first antenna based on the M-1 phase rotation amount to obtain the signals to be converted of the antennas except the first antenna in the M antennas.

In addition, since L data blocks may be data allocated to L different users, and the maximum channel multipath delays of the L users may be different, different delay components may be used on the L data blocks according to the channel characteristics of the users, that is, at least two delay components among a plurality of delay components included in at least one of the M-1 delay amounts are different from each other, in order to obtain better performance.

That is, for any delay amount in M-1 delay amounts, the delay amount includes L delay components, if there are x different delay components in the L delay components, where x is equal to or less than L, the x different delay components correspond to L data blocks, and any component in the x delay components may correspond to one or more data blocks, so that each data block in the L data blocks corresponds to a delay component, and the x different delay components all have corresponding data blocks, when x is equal to L, each delay component in the L delay components included in the delay amount is different, where a specific number of the x different delay components may be determined according to channel resources, which is not limited in the embodiment of the present invention. .

Specifically, if M-1 delay amounts of antennas other than the first antenna among the M antennas with respect to the first antenna are obtained, the delay component corresponding to the ith data blockL is more than or equal to 1 and less than or equal to L, the signal to be converted of the first antenna isThe signal to be converted of the jth antennaSignal to be converted by the first antennaEach component of (a) is held or multiplied by a corresponding phase rotation amount to determine 1 < j ≦ M-1,has a length of KH-1, i.e.The component of the unmapped user data in (1) is 0,the corresponding component of (a) remains 0. For any data block L in the L data blocks, if the signal to be transformed of the first antenna corresponding to the data block L isComponent (A) ofWherein H_lThe number of at least one subcarrier after subcarrier mapping is carried out on a data block l, and the corresponding delay amount of the data block l on a jth antenna isThe amount of phase rotation of the jth antenna relative to the first antenna isSignal to be converted for jth antennaThe component of the corresponding position inThereby obtaining signals to be converted of the antennas except the first antenna in the M antennas.

(4) Performing fast Fourier inverse transformation on the signals to be transformed on the M antennas to obtain FBMC signals of the M antennas;

(5) and performing dislocation superposition on the FBMC signals of the M antennas to obtain the transmitting signals of the M antennas.

It should be noted that steps (1), (4) and (5) are similar to steps (b), (a) and (d) of the first method, respectively, and are not described again in the embodiment of the present invention; the requirements of the M-1 delay amounts of the second method are similar to those of the M-1 delay amounts of the first method, and further description of the embodiment of the invention is omitted.

Step 204: and transmitting the transmission signals of the M antennas.

After determining the transmission signals of the 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 invention obtains the OQAM symbol vector to be transmitted by generating the OQAM symbol vector which comprises L data blocks, wherein L is an integer greater than or equal to 1, and performing subcarrier mapping and filtering processing on the L data blocks included by the OQAM symbol vector, determines the transmission signals of M antennas based on the OQAM symbol vector to be transmitted, so that the transmission signals of the (i + 1) th antenna in the M antennas have delay relative to the transmission signals of the (i) th antenna, i is greater than or equal to 1 and less than or equal to M-1, and then transmits the transmission signals of the M antennas, thereby having the advantages of low complexity, no loss of spectral efficiency, low requirement on channel flatness and the like.

EXAMPLE III

Fig. 4 is a diagram of a multi-antenna diversity receiving method applied in a communication system, where an execution subject of the method is a receiving end, and referring to fig. 4, the method includes the following steps.

Step 301: and extracting a time domain symbol of a received signal, wherein the received signal comprises N signals, the j +1 th signal has delay relative to the j signal, and j is more than or equal to 1 and less than or equal to N-1.

After the transmitting end sends the transmitting signals of the M antennas, the transmitting signals reach the receiving end through channel transmission, at this time, the transmitting signals received by the receiving end can be called as receiving signals, the receiving end extracts corresponding time domain symbols from the receiving signals, the receiving signals comprise N signals, the j +1 th signal has delay relative to the j th signal, and j is greater than or equal to 1 and less than or equal to N-1.

For example, the time domain symbol of the j +1 th signal is extracted asThe time domain symbol of the j signal is extracted asWherein,andare all vectors of length KH, andKH point data ratio ofThe KH point data of (1) is delayed by H/2 points.

Step 302: and carrying out fast Fourier transform on the time domain symbol to obtain the symbol to be processed.

And performing Fast Fourier Transform (FFT) of KH points on the time domain symbols of the extracted N signals to obtain symbols to be processed, such as,FFT of KH point is carried out to obtain

Step 303: and carrying out equalization processing, filtering processing and subcarrier inverse mapping on the symbol to be processed to obtain an OQAM symbol vector, wherein the symbol to be processed is subjected to equalization processing, so that the j +1 th signal has no delay relative to the j th signal, and j is more than or equal to 1 and less than or equal to N-1.

Specifically, when equalization is performed, if the channel frequency is c (k), the equalizer coefficient eq (k) for equalization is 1/c (k), k is 0 ≦ KH-1, and when the symbol to be processed is c (k), the equalizer coefficient eq (k) is 1/c (k), k is 0 ≦ KH-1Then, the symbol after equalization isThen g is_n,k＝f_n,k× EQ (k), k is more than or equal to 0 and less than or equal to KH-1, wherein f_n,kIs thatThe k element of (2), g_n,kIs composed ofThe kth element of (1).

In performing the filtering process, which is an operation matched to the filtering process in the transmitting end, it may also be realized by cyclic convolution, except that the frequency response of the receiving-end filter is a conjugate of the frequency response of the transmitting-end filter.

When the subcarrier inverse mapping is carried out, the subcarrier inverse mapping corresponds to the carrier mapping of the sending terminal, and after the subcarrier inverse mapping is carried out, the symbols to be processed are mapped back to the OQAM symbol receiving signals corresponding to the sending terminal.

It should be noted that, if the downlink signal transmission is performed, the receiving end only needs to extract the data scheduled to its own subcarrier, and does not need to perform subsequent processing on the data on all subcarriers. If the uplink signal transmission is performed, the receiving end needs to extract data on all useful subcarriers for subsequent processing.

Optionally, the equalizing processing, the filtering processing and the sub-carrier inverse mapping for the symbol to be processed may be performed in sequence according to two different orders, that is, the equalizing processing, the filtering processing and the sub-carrier inverse mapping for the symbol to be processed are performed in sequence; or, filtering, sub-carrier inverse mapping and balancing are sequentially carried out on the symbols to be processed. The difference is that the equalization processing is performed on KH data at most when the equalization processing is performed first, and the equalization processing is performed on H data at most when the equalization processing is performed last.

The multi-antenna diversity receiving method provided by the embodiment of the invention extracts the time domain symbol of the received signal, the received signal comprises N signals, the j +1 th signal has delay relative to the j signal, j is more than or equal to 1 and less than or equal to N-1, the time domain symbol is subjected to fast Fourier transform to obtain a symbol to be processed, and then the symbol to be processed is subjected to equalization processing, filtering processing and subcarrier inverse mapping to obtain an OQAM symbol vector, wherein the symbol to be processed is subjected to equalization processing, so that the j +1 th signal has no delay relative to the j signal, and the OQAM symbol vector can be effectively obtained from the received signal.

Example four

FIG. 5 is a diagram of a multi-antenna diversity transmitting apparatus according to an embodiment of the present invention, applied to a communication system including M antennas, where M ≧ 2, and referring to 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;

A processing unit 402, configured to perform subcarrier mapping and filtering processing on L data blocks included in the OQAM symbol vector to obtain an OQAM symbol vector to be sent;

A determining unit 403, configured to determine, based on the to-be-transmitted OQAM symbol vector, transmission signals of the M antennas, so that a transmission signal of an i +1 th antenna in the M antennas has a delay with respect to a transmission signal of an i-th antenna, where i is greater than or equal to 1 and is less than or equal to M-1;

a sending unit 404, configured to send the transmission signals of the M antennas.

Optionally, the processing unit 402 is specifically configured to:

Optionally, there is a delay of the transmission signal of the (i + 1) th antenna in the M antennas relative to the transmission signal of the ith antenna, which is greater than the maximum channel multipath delay.

Optionally, the determining unit 403 is specifically configured to:

Optionally, the determining unit 403 is further specifically configured to:

Optionally, at least two delay components of the plurality of delay components included in at least one of the M-1 delay amounts are different from each other.

Optionally, M-1 delay amounts of the antennas other than the first antenna among the M antennas are different from each other with respect to the first antenna.

The multi-antenna diversity transmitting device provided by the embodiment of the invention obtains an OQAM symbol vector to be transmitted by generating the OQAM symbol vector which comprises L data blocks, wherein L is an integer greater than or equal to 1, and performing subcarrier mapping and filtering processing on the L data blocks included by the OQAM symbol vector, determines the transmitting signals of M antennas based on the OQAM symbol vector to be transmitted, so that the transmitting signal of the (i + 1) th antenna in the M antennas has delay relative to the transmitting signal of the (i) th antenna, i is greater than or equal to 1 and less than or equal to M-1, and then transmits the transmitting signals of the M antennas, thereby having the advantages of low complexity, no loss of spectral efficiency, low requirement on channel flatness and the like.

EXAMPLE five

Fig. 6 is a diagram of a multi-antenna diversity receiving apparatus according to an embodiment of the present invention, and referring to fig. 6, the apparatus includes:

an extracting unit 501, configured to extract a time domain symbol of a received signal, where the received signal includes N signals, and a j +1 th signal is delayed from a jth signal, where j is greater than or equal to 1 and is less than or equal to N-1;

A transforming unit 502, configured to perform fast fourier transform on the time domain symbol to obtain a symbol to be processed;

A processing unit 503, configured to perform equalization processing, filtering processing, and sub-carrier 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 +1 th signal has no delay relative to the j th signal, and j is greater than or equal to 1 and is less than or equal to N-1.

Optionally, the processing unit 503 is specifically configured to:

or,

The difference is that the equalization processing is performed on KH data at most when the equalization processing is performed first, and the equalization processing is performed on H data at most when the equalization processing is performed last.

The multi-antenna diversity receiving device provided by the embodiment of the invention extracts the time domain symbol of the received signal, the received signal comprises N signals, the j +1 th signal has delay relative to the j signal, j is more than or equal to 1 and less than or equal to N-1, the time domain symbol is subjected to fast Fourier transform to obtain the symbol to be processed, and then the symbol to be processed is subjected to equalization processing, filtering processing and subcarrier inverse mapping to obtain the OQAM symbol vector, wherein the symbol to be processed is subjected to equalization processing, so that the j +1 th signal has no delay relative to the j signal, and the OQAM symbol vector can be effectively obtained from the received signal.

EXAMPLE six

Fig. 7 is a multi-antenna diversity transmitting apparatus according to an embodiment of the present invention, where the apparatus includes a memory 701, a processor 702, a power supply component 703, an input/output interface 704, a communication component 705, and the like, and the processor 702 is configured to execute the multi-antenna diversity transmitting method according to the second embodiment.

It will be understood by those skilled in the art that the structure shown in fig. 7 is only an illustration and does not limit the structure of the multi-antenna diversity transmitting apparatus. The multi-antenna diversity transmitting device may also include more or fewer components than shown in fig. 7, or have a different configuration than shown in fig. 7, for example.

The following describes the components of the multi-antenna diversity transmitting device in detail:

memory 701 may be used to store data, software programs, and modules; the system mainly comprises a program storage area and a data storage area, wherein the program storage area can store an operating system, an application program required by at least one function and the like; the storage data area may store data created according to the use of the multi-antenna diversity transmitting apparatus, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile 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 apparatus, connects various parts of the entire apparatus using various interfaces and lines, and performs various functions of the apparatus and processes data by operating or executing software programs and/or modules stored in the memory 701 and calling data stored in the memory 701, thereby performing overall monitoring of the multi-antenna diversity transmitting apparatus. Alternatively, processor 702 may include one or more processing units; preferably, the processor 702 may integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 702.

The power supply component 703 is used to provide power to the various components of the multiple antenna diversity transmitting device, and the power supply component 703 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the multiple antenna diversity transmitting device.

Input/output interface 704 provides an interface between processor 702 and peripheral interface modules, such as a keyboard, mouse, etc.

The communication component 705 is configured to facilitate communication between the multiple antenna diversity transmitting device and other devices in a wired or wireless manner. 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.

Although not shown, the multi-antenna diversity transmitting apparatus may further include an audio component, a multimedia component, and the like, and the embodiments of the present invention are not described herein again.

According to the multi-antenna diversity transmitting device provided by the embodiment of the invention, an OQAM symbol vector is generated, the OQAM symbol vector comprises L data blocks, L is an integer greater than or equal to 1, subcarrier mapping and filtering processing are carried out on the L data blocks included by the OQAM symbol vector to obtain an OQAM symbol vector to be transmitted, and based on the OQAM symbol vector to be transmitted, transmission signals of M antennas are determined, so that the transmission signal of the (i + 1) th antenna in the M antennas has delay relative to the transmission signal of the (i) th antenna, i is greater than or equal to 1 and less than or equal to M-1, and then the transmission signals of the M antennas are transmitted, so that the multi-antenna diversity transmitting device has the advantages of low complexity, no loss of spectral efficiency, low requirement on channel flatness and the like.

EXAMPLE seven

Fig. 8 provides a multi-antenna diversity receiving apparatus according to an embodiment of the present invention, where the apparatus includes a memory 801, a processor 802, a power supply component 803, an input/output interface 804, a communication component 805, and the like. The processor 802 is configured to perform the multiple antenna diversity receiving method according to the third embodiment.

It will be understood by those skilled in the art that the structure shown in fig. 8 is only an illustration and does not limit the structure of the multi-antenna diversity receiving apparatus. The multi-antenna diversity receiving apparatus may also include more or fewer components than shown in fig. 8, or have a different configuration than shown in fig. 8, for example.

The following describes the components of the multi-antenna diversity receiving apparatus:

memory 801 may be used to store data, software programs, and modules; the system mainly comprises a program storage area and a data storage area, wherein the program storage area can store an operating system, an application program required by at least one function and the like; the storage data area may store data created according to the use of the multi-antenna diversity transmitting apparatus, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 802 is a control center of the multi-antenna diversity receiving apparatus, connects various parts of the entire multi-antenna diversity receiving apparatus using various interfaces and lines, and performs various functions of the multi-antenna diversity receiving apparatus and processes data by running or executing software programs and/or modules stored in the memory 801 and calling data stored in the memory 801, thereby performing overall monitoring of the multi-antenna diversity receiving apparatus. Optionally, processor 802 may include one or more processing units; preferably, the processor 802 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 802.

The power supply component 803 is used to provide power to the various components of the multiple antenna diversity receiving device, and the power supply component 803 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the multiple antenna diversity receiving device.

Input/output interface 804 provides an interface between processor 802 and peripheral interface modules, such as a keyboard, a mouse, etc.

The communication component 805 is configured to facilitate communication between the multiple antenna diversity receiving device and other devices in a wired or wireless manner. 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.

Although not shown, the multi-antenna diversity receiving apparatus may further include an audio component, a multimedia component, and the like, and the embodiments of the present invention are not described herein again.

Example eight

An embodiment of the present invention provides a multi-antenna diversity system, which includes a multi-antenna diversity transmitting apparatus shown in fig. 7 and a multi-antenna diversity receiving apparatus shown in fig. 8.

In the embodiment of the invention, the multi-antenna diversity transmitting device generates OQAM symbol vectors, performs subcarrier mapping and filtering processing on L data blocks included in the OQAM symbol vectors to obtain OQAM symbol vectors to be transmitted, determines transmitting signals of M antennas based on the OQAM symbol vectors to be transmitted, transmits the transmitting signals of the M antennas, receives the transmitting signals by the multi-antenna diversity receiving device, extracts time domain symbols of the received signals by the multi-antenna diversity receiving device, performs FFT on the time domain symbols to obtain symbols to be processed, and performs equalization processing, filtering processing and subcarrier inverse mapping on the symbols to be processed to obtain the OQAM symbol vectors, so that the multi-antenna diversity system has the advantages of low complexity, no loss of spectral efficiency, low requirement on channel flatness and the like.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A multi-antenna diversity transmission method is applied to a communication system comprising M antennas, wherein M is larger than or equal to 2, and the method comprises the following steps:

and transmitting the transmitting signals of the M antennas.

2. The method of claim 1, wherein sub-carrier mapping the L data blocks comprised by the OQAM symbol vectors comprises:

3. The method of claim 1, wherein the transmission signal of the (i + 1) th antenna of the M antennas is delayed relative to the transmission signal of the (i) th antenna by a delay amount greater than a maximum channel multipath delay.

4. The method of claim 1, wherein the determining the transmission signals on the M antennas based on the OQAM symbol vectors to be transmitted comprises:

5. The method of claim 1, wherein the determining the transmission signals on the M antennas based on the OQAM symbol vectors to be transmitted comprises:

6. The method according to claim 5, wherein the cyclically shifting the signals to be transformed on the first antennas based on the M-1 delay amounts to obtain the signals to be transformed on the antennas except for the first antenna among the M antennas comprises:

7. The method of claim 6, wherein at least one of the M-1 delay amounts comprises at least two of the plurality of delay components that are different from each other.

8. The method of claim 4 or 5, wherein the M-1 delay amounts of the other antennas than the first antenna are different from the first antenna.

9. A multiple antenna diversity reception method, comprising:

10. The method of claim 9, wherein the equalizing the symbols to be processed, the filtering the symbols to be processed, and the inverse mapping of subcarriers comprise:

or,

11. A multi-antenna diversity transmitting device is applied to a communication system comprising M antennas, wherein M is larger than or equal to 2, and the device comprises:

12. The apparatus according to claim 11, wherein the processing unit is specifically configured to:

13. The apparatus of claim 11, wherein the transmission signal of the (i + 1) th antenna of the M antennas is delayed relative to the transmission signal of the (i) th antenna by a delay amount greater than a maximum channel multipath delay.

14. The apparatus according to claim 11, wherein the determining unit is specifically configured to:

15. The apparatus according to claim 11, wherein the determining unit is specifically configured to:

16. The apparatus according to claim 15, wherein the determining unit is further specifically configured to:

17. The apparatus of claim 16, wherein at least one of the M-1 delay amounts comprises at least two of the plurality of delay components that are different from each other; or,

each of the M-1 delay amounts includes a plurality of delay components each different from each other.

18. The apparatus of claim 14 or 15, wherein M-1 delay amounts of the antennas other than the first antenna are different from the first antenna.

19. A multiple antenna diversity receiving apparatus, comprising:

20. The apparatus according to claim 19, wherein the processing unit is specifically configured to:

or,

21. A multiple antenna diversity transmission apparatus, characterized in that the apparatus comprises a processor and a memory, the memory being adapted to store code and data, the processor being adapted to execute the code in the memory, the processor being adapted to perform the multiple antenna diversity transmission method according to any of the preceding claims 1-8.

22. A multiple antenna diversity reception apparatus, characterized in that the apparatus comprises a processor and a memory, the memory being adapted to store code and data, the processor being adapted to execute the code in the memory, the processor being adapted to perform the multiple antenna diversity reception method according to any of the preceding claims 9-10.

23. A multiple antenna diversity system, characterized in that it comprises a multiple antenna diversity transmitting device according to claim 21 and a multiple antenna diversity receiving device according to claim 22.