WO2015000306A1

WO2015000306A1 - Channel estimation processing method, apparatus and communication device

Info

Publication number: WO2015000306A1
Application number: PCT/CN2014/072412
Authority: WO
Inventors: 黄煌; 林伟; 严茜
Original assignee: 华为技术有限公司
Priority date: 2013-07-01
Filing date: 2014-02-22
Publication date: 2015-01-08
Also published as: CN104283819B; CN104283819A

Abstract

Provided in the present invention are a channel estimation processing method, apparatus and communication device, wherein a phase compensation processing method comprises: obtaining from various receiving antennae a reception signal of at least one first pilot frequency subcarrier in channel estimation preamble sequences transmitted simultaneously by a plurality of transmitting antennae; according to the reception signal of the at least one first pilot frequency subcarrier, obtaining the phase shift parameters of the various receiving antennae during the reception of the channel estimation preamble sequences, and obtaining a channel estimation matrix during the reception of data symbols; obtaining from the various receiving antennae a reception signal of at least one second pilot frequency subcarrier in the data symbols, the reception signal being obtained by calculation on the basis of non-common source phase noise factors of different receiving antennae, and obtaining the phase shift parameters of the various receiving antennae during the reception of the data symbols; and performing phase compensation on the received data subcarrier according to the phase shift parameters as well as the channel estimation matrix during the reception of the data symbols. The technical solution of the present invention can reduce the influence of phase noise and frequency offset effectively.

Description

Channel estimation processing method, device and communication device

This application is submitted to the Chinese Patent Office on July 1, 2013, and the application number is

The priority of the Chinese Patent Application, which is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and in particular, to a channel estimation processing method, apparatus, and communication device. Background technique

Future broadband wireless communication systems need to achieve fast transmission of integrated service content on limited spectrum resources, so it is necessary to improve spectrum efficiency and transmission reliability. MIM0 technology can fully develop space resources, realize multiple transmission and reception with multiple antennas, and multiply channel capacity without increasing spectrum resources and antenna transmission power. In addition, as one of the multi-carrier techniques, the sub-carriers of the OFDM system are orthogonal to each other, and the spectrum resources can be efficiently utilized, and the adverse effects caused by multipath effects and frequency selective fading can be overcome. The MIM0-0FDM technology, which effectively combines the two, achieves high reliability of signal transmission while improving system capacity and spectrum utilization. Therefore, MIM0-0FDM has become the mainstream technology of current wireless communication.

However, while the MIM0-0FDM system achieves the above advantages, its transmission is also affected by phase noise and frequency offset due to its orthogonal multi-carrier characteristics. Moreover, the introduction of multiple antennas results in channel estimation between antennas that is also more difficult than single antenna systems, especially in the presence of phase noise and frequency offset. The source of RF noise for phase noise and frequency offset is mainly generated by the oscillator, and the higher the oscillator frequency, the more severe the distortion. The output of an ideal oscillator with a frequency of ^/() is:

However, in practice, the ideal oscillator does not exist. The oscillator output affected by phase noise and frequency offset is:

a(t) = cos (2π f ₀ t + 2πΑβ + φ{ί)) where is the frequency offset, phase noise ^ ω is a stochastic process.

For the actual MIM0-0FDM system, effective and low complexity phase noise and frequency offset compensation methods are very important. The channel estimation of the system is closely related to the signal phase noise and frequency offset compensation method. People often need to jointly design and optimize. The existing joint channel estimation and phase compensation methods consider the case of the transmitting and receiving antenna eutectic (common source), that is, the common source between the transmitting antennas and the common source of the receiving antennas. For the MIM0-0FDM system, the single-sided non-cosource between the antennas, such as the common source of the transmitting antenna, the receiving antenna is not common source, or the transmitting antenna is not common source, and the receiving antenna is common source communication, the prior art cannot effectively reduce Phase noise and frequency offset effects. Summary of the invention

The invention provides a channel estimation processing method, device and communication device, which can effectively reduce phase noise and frequency offset effects.

A first aspect of the present invention provides a phase compensation processing method, including:

Obtaining, by each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence that is simultaneously transmitted by multiple transmitting antennas, where the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, Wherein the plurality of transmitting antennas are common sources, and the receiving antennas are not common sources;

Acquiring, according to the received signal of the at least one first pilot subcarrier, a phase offset parameter of each receiving antenna when receiving a channel estimation preamble, and according to a phase offset parameter of each receiving antenna when receiving a pilot subcarrier Obtaining a channel estimation matrix when receiving data symbols;

Obtaining, by each receiving antenna, a received signal of at least one second pilot subcarrier in the data symbol, where the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, and according to the at least one second guide The received signal of the frequency subcarrier acquires a phase offset parameter of each receiving antenna when receiving the data symbol;

And phase-compensating the received data subcarriers according to a phase offset parameter of each of the receiving antennas when receiving the data symbols, and a channel estimation matrix when receiving the data symbols.

In combination with the first possibility of the first aspect, the receiving signals of the at least one first pilot subcarrier in the channel estimation preamble simultaneously transmitted by the plurality of transmitting antennas from the respective receiving antennas include:

— (/)— ~ _e ―

s ^k (l) + ICI _l + z _l

Where w is the number of receiving antennas, M is the number of transmitting antennas, and z is the first channel preamble The sequence, ι=\, . . . , η , y^) is the received signal of the "receiving antenna, ⁿ = ^N , ^w is the non-co-source phase noise factor of the "receiving antenna", ^ ^w is the transmitting antenna The common source phase offset is straight, ( ^z ) is the first pilot subcarrier, and respectively represents inter-carrier interference and channel noise, and ^H represents the channel estimation matrix when the channel estimation preamble sequence is received.

In combination with the first possible second possibility, the obtaining, according to the received signal of the at least one first pilot subcarrier, the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence includes:

n = \,...,N,

w = l" .., M.

In combination with the second possible third possibility, the channel estimation matrix obtained when acquiring the data symbols according to the phase offset parameter of each receiving antenna when receiving the pilot carrier includes:

Where „(1) is the phase offset parameter caused by the common phase offset of the transmitting antenna and the phase offset of the receiving antenna n for the first channel preamble symbol, which is a positive integer, H receives the data symbol Channel estimation parameters for the first data subcarrier.

In combination with the third possible fourth possibility described above, the phase compensation for the received data subcarriers includes:

3⁄4 (

Where ['] ^† is the conjugate transpose operator of the matrix, which is the second data subcarrier in the first digital symbol transmitted by the wth antenna, indicating the phase offset value of each receiving antenna when receiving the data symbol. .

A second aspect of the present invention provides another phase compensation processing method, including:

Obtaining, by each of the receiving antennas, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by a plurality of transmitting antennas, and the received signal is calculated according to a non-co-source phase noise factor of different transmitting antennas, where the transmitting is performed The transmitting antennas are not common sources, and the respective receiving antennas are common sources; Obtaining, according to the received signal of each subcarrier in the channel estimation preamble sequence, a channel estimation matrix; acquiring, according to the channel estimation matrix, a phase offset parameter of each transmit antenna when transmitting a subcarrier of the data symbol;

And phase-compensating the received signal according to the phase offset parameter of each of the transmitting antennas when transmitting the subcarriers of the data symbols, and the channel estimation matrix.

In combination with the first possibility of the second aspect, the received signals of the sub-carriers in the channel estimation preamble sequence obtained by acquiring the plurality of transmit antennas from each of the receiving antennas include

Where w represents the wth channel preamble sequence, y ^km is the received signal of the "receiving antenna, n · '', ^Ν , is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^w is the The non-common source phase noise factor of w transmit antennas, ^{m = M} , M is the number of transmit antennas, which is the ^kth subcarrier in the wth channel preamble sequence, and ^ICI 'and ^ζ ' indicate inter-carrier interference and channel noise, respectively. , ^ denotes the channel estimation matrix when receiving the channel estimation preamble sequence.

In combination with the first possible second possibility, the foregoing receiving channel estimation matrix of each subcarrier in the preamble sequence according to the channel estimation includes:

Where cc m) = φ(ηή + θ _Μ (ηή.

In combination with the second possible third possibility, the phase offset parameters obtained by acquiring the subcarriers of the data symbols according to the channel estimation matrix are:

In combination with the third possible fourth possibility, the phase offset parameters according to the respective transmit antennas when transmitting the data symbol subcarriers, and the phase estimation matrix of the received signal are included: ^l

H. H. IT

^X M 0 ·■· e- ^J& " ^(!) (/) where the signal representing the ^th subcarrier in the data symbol transmitted by the wth transmitting antenna indicates the first subcarrier in the data symbol received by the "receiving antenna" The signal, the conjugate transpose operator of the matrix, represents the channel estimation matrix when the data symbols are received.

A third aspect of the present invention provides a phase compensation processing apparatus, including:

a first acquiring module, configured to acquire, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence that is simultaneously sent by multiple transmitting antennas, where the received signal is not according to different receiving antennas The source phase noise factor is calculated, wherein the plurality of transmit antennas are common sources, and the respective receive antennas are not common sources;

a second acquiring module, configured to acquire, according to the received signal of the at least one first pilot subcarrier, a phase offset parameter of each receiving antenna when receiving a channel estimation preamble sequence, and receive a pilot according to each receiving antenna a phase offset parameter at the time of carrier acquisition acquires a channel estimation matrix when receiving a data symbol;

a third acquiring module, configured to acquire, according to a non-co-source phase noise factor of different receiving antennas, a received signal of the second pilot subcarrier in the data symbol, and the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, and according to Receiving signals of the at least one second pilot subcarrier acquire phase offset parameters of each receiving antenna when receiving data symbols;

And a first phase compensation module, configured to perform phase compensation on the received data subcarrier according to a phase offset parameter of each of the receiving antennas when receiving the data symbol, and a channel estimation matrix when receiving the data symbol.

With reference to the first possibility of the third aspect, the receiving, by the first acquiring module, the at least one first pilot subcarrier in the channel estimation preamble sequence that is simultaneously sent by the multiple receiving antennas from each receiving antenna includes:

— (/)— ~ _e

Where w is the number of receiving antennas, M is the number of transmitting antennas, z is the first channel preamble sequence, i = i, . . . , n , y^ ^k ) is the received signal of the "receiving antenna, ⁿ = " , ^N , ^w is the non-co-source phase noise factor of the “receiving antenna”, and ^ ^W is the common source phase offset value of the transmitting antenna, which is the kth The pilot subcarriers, and ^ represent inter-carrier interference and channel noise, respectively, and H represents the channel estimation matrix when the channel estimation preamble sequence is received.

And collecting, by the second obtaining module, the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier, including: s ( /)H„

Where (·) is the angle operator, H e H: =∑H, n = \, . . . , N , w = l" .., M.

In combination with the second possible third possibility, the foregoing third obtaining module acquires a channel estimation matrix packet when receiving data symbols according to phase offset parameters of each receiving antenna at a pilot subcarrier.

In combination with the third possible fourth possibility, the phase compensation of the received data subcarrier by the first phase compensation module includes:

Where N ^T is a conjugate transpose operator of the matrix, and W is the second data subcarrier in the first digital symbol transmitted by the wth antenna, and represents a phase offset value of each receiving antenna when receiving the data symbol.

A fourth aspect of the present invention provides another phase compensation processing apparatus, including:

a fourth acquiring module, configured to acquire, from each receiving antenna, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by multiple transmit antennas, and the received signal is calculated according to a non-co-source phase noise factor of different transmit antennas Obtaining, wherein transmitting the plurality of transmitting antennas is not common source, and each receiving antenna is common source; a fifth acquiring module, configured to acquire a channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence;

a sixth acquiring module, configured to acquire, according to the channel estimation matrix, a phase offset parameter of each transmit antenna when transmitting a subcarrier of the data symbol;

And a second phase compensation module, configured to perform phase compensation on the received signal according to a phase offset parameter of each of the transmitting antennas when transmitting a subcarrier of the data symbol, and the channel estimation matrix.

In combination with the first possibility of the fourth aspect, the fourth obtaining module obtains, by each of the receiving antennas, the plurality of transmitting antennas, and the sub-carriers in the channel estimation preamble sequence that are sent by the time-division:

Where w is the wth channel preamble sequence, which is the received signal of the "receiving antenna, η · '', ^Ν , is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, and ^w is the wth The non-co-source phase noise factor of the transmitting antenna, ^{m =} , , ^M , M is the number of transmitting antennas, ^ is the kth subcarrier in the wth channel preamble sequence, and ^ICI ! and respectively represent inter-carrier interference and channel noise, ^ denotes a channel estimation matrix when receiving a channel estimation preamble sequence.

In combination with the first possible second possibility, the foregoing fifth obtaining module acquires the channel estimation matrix according to the received signals of each subcarrier in the channel estimation preamble sequence, including:

H ■ « H* e where cc m) = φ(ηή + θ _Μ (ηή.

In combination with the second possible third possibility, the foregoing sixth obtaining module acquires, according to the channel estimation matrix, a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol, where: the first data symbol sent by the transmitting antenna is represented by: .

In combination with the third possible fourth possibility, the second phase compensation module performs phase compensation on the received signal according to the phase offset parameter of each transmit antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix includes: ^l

H H IT

^X M 0 ·■· e- ^J& " ^(!) (/) where the signal representing the first subcarrier in the data symbol transmitted by the wth transmitting antenna indicates the ^th subcarrier in the data symbol received by the "receiving antenna" The signal, ['] ^† is the conjugate transpose operator of the matrix, representing the channel estimation matrix when the data symbols are received.

A fifth aspect of the present invention provides a communication device, including:

a receiving antenna, configured to receive a signal transmitted by the transmitting antenna, where the multiple transmitting antennas are common sources, and the receiving antennas are not common sources;

a processor, configured to acquire, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence simultaneously transmitted by multiple transmit antennas, where the received signal is a non-co-source phase according to different receiving antennas And obtaining, according to the received signal of the at least one first pilot subcarrier, a phase offset parameter of each receiving antenna when receiving the channel estimation preamble sequence, and according to the receiving antenna when receiving the pilot subcarrier The phase offset parameter acquires a channel estimation matrix when receiving the data symbols; and acquires, by each receiving antenna, a received signal of at least one second pilot subcarrier in the data symbol, the received signal being a non-common source according to different receiving antennas The phase noise factor is calculated, and the phase offset parameter of each receiving antenna when receiving the data symbol is obtained according to the received signal of the at least one second pilot subcarrier; and the phase offset of each receiving antenna when receiving the data symbol The shift parameter, and the channel estimation matrix when receiving the data symbol are received According to a subcarrier phase compensation.

With reference to the first aspect of the fifth aspect, the receiving, by the processor, acquiring, by each of the receiving antennas, the received signals of the at least one first pilot subcarrier in the channel estimation preamble sequence simultaneously transmitted by the multiple transmitting antennas includes:

— (/)— • 0 " · ~e ⁱ · • 0 ―

― s ^k (l) + ICI _l + z _l (/)— 0 · _ ^Η ΝΙ · . . NM 0 · where w is the number of receiving antennas, M is the number of transmitting antennas, and z is the z-th channel preamble sequence. 1 = . n , is the received signal of the "receiving antenna, ^{η =} , · ", ^Ν , is the non-co-source phase noise factor of the "receiving antenna", ^ ^W is the common source phase offset value of the transmitting antenna, ( ^Ζ ) is the first pilot subcarrier, and ^ represents inter-carrier interference and channel noise, respectively, and ^H represents the channel estimation matrix when the channel estimation preamble sequence is received. In combination with the first possible second possibility, the foregoing processor, according to the received signal of the at least one first pilot subcarrier, acquires phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence, including:

y _n ^k (i)

s ^K (l)W _n where (.) is the angle operator, = 》 ⁽¹ , K =∑H _n ^k _m ^ n = l, . . . , N , w = l" .., M.

In combination with the second possible third possibility, the channel estimation matrix when the processor obtains the received data symbol according to the phase offset parameter of each receiving antenna when receiving the pilot subcarrier includes:

Where „(i) is the phase offset parameter caused by the common phase offset of the transmitting antenna and the phase offset received by the receiving antenna n for the first channel preamble symbol, which is a positive integer, H receives the data symbol Channel estimation parameters for the first data subcarrier.

In combination with the third possible fourth possibility, the processor performs phase compensation on the received data subcarriers including:

(/)

A sixth aspect of the present invention provides another communication device, including:

a receiving antenna, configured to receive a signal transmitted by the transmitting antenna, where the multiple transmitting antennas are not common, and the receiving antennas are common;

a processor, configured to obtain, from each receiving antenna, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by multiple transmit antennas, and the received signal is calculated according to a non-co-source phase noise factor of different transmit antennas; Acquiring a channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence; acquiring, according to the channel estimation matrix, a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol; according to each of the transmitting antennas Send the symbol of the data symbol The phase offset parameter of the wave time, and the channel estimation matrix phase compensate the received signal. In combination with the first possibility of the first aspect, the foregoing processor obtains, by each of the receiving antennas, the receiving of each subcarrier in the channel estimation preamble sequence that is sent by multiple transmitting antennas in time division:

Where w denotes the wth channel preamble sequence, which is the received signal of the "receiving antenna", ^{η = λ} , ^Ν , which is the number of receiving antennas, ^

The kth subcarrier in the pilot sequence, ^=W ^ICI !, the common source phase noise at the receiving antenna, ^W is the non-co-source phase noise factor of the wth transmit antenna, ^M , M is the number of transmit antennas, ^ is the wth The pre-channel sums represent inter-carrier interference and channel noise, respectively, and ^ denotes the channel estimation matrix when the channel estimation preamble sequence is received.

In combination with the first possible second possibility, the foregoing processor acquiring the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence includes:

Where cc m) = φ(ηή + θ _Μ (ηή.

In combination with the second possible third possibility, the foregoing processor obtains, according to the channel estimation matrix, a phase offset parameter of each transmit antenna when transmitting a subcarrier of the data symbol, where: the first data symbol sent by the transmit antenna is represented by the transmit antenna.

In combination with the third possible fourth possibility, the foregoing processor performs phase compensation on the received signal according to the phase offset parameter of each transmit antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix includes:

Wherein, the signal indicating the first subcarrier in the data symbol transmitted by the wth transmitting antenna indicates the signal of the ^th subcarrier in the data symbol received by the "receiving antenna", and ['] ^† is the conjugate transpose operator of the matrix , indicates the channel estimation matrix when receiving data symbols. The present invention provides a channel estimation processing method, apparatus, and communication device, wherein a common source of the transmitting antenna, a receiving antenna is not common source, or a transmitting antenna is not common source, and a single-sided common source communication scenario of the receiving antenna is common, Obtaining a phase offset parameter of each receiving antenna when receiving the data symbol, and performing, according to the phase offset parameter of each receiving antenna when receiving the data symbol, and the channel estimation matrix when receiving the data symbol, performing the received data subcarrier Phase compensation, or obtaining a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol, according to a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol, and the channel estimation matrix pair The received signal is phase compensated, which can effectively reduce the phase noise and frequency offset effects. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief description of the drawings to be used in the description of the embodiments will be briefly made. It is obvious that the drawings in the following description are some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying creative labor.

1 is a schematic flowchart 1 of a phase compensation processing method according to an embodiment of the present invention;

2 is a schematic diagram 1 of a transmitting signal of a transmitting antenna according to an embodiment of the present invention;

3 is a second schematic flowchart of a phase compensation processing method according to an embodiment of the present invention;

4 is a schematic structural diagram of a subcarrier in an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a transmitting signal of a transmitting antenna according to an embodiment of the present invention; FIG.

6 is a schematic diagram 3 of a transmitting signal of a transmitting antenna according to an embodiment of the present invention;

7 is a schematic diagram 1 of performance comparison between an embodiment of the present invention and a prior art;

FIG. 8 is a second schematic diagram of performance comparison between an embodiment of the present invention and the prior art; FIG.

FIG. 9 is a schematic structural diagram 1 of a phase compensation processing apparatus according to an embodiment of the present invention; FIG.

FIG. 10 is a second schematic structural diagram of a phase compensation processing apparatus according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art obtain the following without creative efforts. All other embodiments obtained are within the scope of the invention.

For the deficiencies in the prior art, the embodiment of the present invention sends a channel preamble sequence in a corresponding manner for the Tx common source, the Rx non-common source, the Tx non-co-source, and the Rx common source, and uses corresponding channels. The estimation method obtains channel estimation values whose phases are compensated for the respective common source conditions of the antenna, and combines channel estimation and phase tracking, and for inaccurate channel estimation values including phase noise, according to the respective antenna common source conditions in the signal detection phase The phase tracking and compensation are further performed to obtain a more accurate phase compensation value, which can make the transmission data detection more accurate when the antenna side is not common, and effectively improve the BER performance of the system.

First, for the case where the Tx is common source and the Rx is not common source, FIG. 1 is a schematic flowchart 1 of a phase compensation processing method according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps:

Step 101: Acquire, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence that is simultaneously sent by multiple transmitting antennas, where the received signal is a non-co-source phase noise according to different receiving antennas. The factor is calculated, wherein the plurality of transmitting antennas are common sources, and the receiving antennas are not common sources;

Specifically, in the antenna configuration of 7 common source and Rx non-common source, the transmitting antenna performs signal transmission according to FIG. 2, and a pilot subcarrier is inserted in each channel estimation preamble sequence, and FIG. 2 is two. The transmit antennas Tx1 and Tx2, the two channel estimation preamble sequences, that is, the first channel estimation preamble sequence and the second channel estimation preamble sequence are taken as examples. Suppose the system has one transmit antenna and W receive antennas.

Ζ denotes a first channel preamble sequence, ^{l =} , ^M , for the first pilot subcarrier in the first channel preamble sequence, at least one of the channel estimation preamble sequences simultaneously obtained by acquiring multiple transmit antennas from each receiving antenna The received signals of a pilot subcarrier include: (/)+/c/, +

(/)+/c/, + (/) + /C/, + z,

Where (/) is the received signal of the Mth receiving antenna, (" = 1,...,N), which is the non-co-source phase noise at the Mth receiving antenna. Therefore, it is the common source phase offset of the transmitting antenna. Value, (/) is the first The pilot subcarriers, /(:/, and respectively represent residual inter-carrier interference and channel noise, and H represents the channel estimation matrix when the channel estimation preamble sequence is received.

In the above formula, ^k = today H ^k n = \,...,N, w = l,...,M.

Step 102: The received signal of the at least one first pilot subcarrier acquires a phase offset parameter of each receiving antenna when receiving a channel estimation preamble sequence, and receives a pilot subcarrier according to each receiving antenna. The phase offset parameter of the time obtains the channel estimation matrix when the data symbol is received. In this step, first, for the first pilot subcarrier in the first channel preamble sequence, the LS algorithm is used.

_ Tji ί>-.ω+β(ΐ)) N

Subsequently, the technical solution of the present invention can estimate the pilot subcarriers in the / (/ = 2, ..., ) channel preamble sequences received by the receiving antenna M.

a _n (l) = a _n (l)-a _n (\)= X (/) η = \,.··,Ν

(/)0; where (·) is the angle operator, and the sum operation is to sum all the pilot subcarriers. This step requires calculation of one phase value for all of the receiving antennas, whereas in the prior art only a single phase offset value is calculated for only one of the receiving antennas.

Step 103: Obtain, from each receiving antenna, a received signal of at least one second pilot subcarrier in a data symbol, where the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, and according to the at least The received signal of a second pilot subcarrier acquires a phase offset parameter of each receiving antenna when receiving the data symbol;

Specifically, for all the channel preamble sequences, the first data subcarriers of the received signal are combined by space-time coding, and:

Yf(X) yA ^d 2)e ⁱ⁾⁾ ... yf(M)ed _ί -]{ά _Ν (2))

y _N ^d (2)e

Wherein each of the receiving antennas in γ is compensated by the calculated N phase offset values, and the existing The phase offset compensation values for each receive antenna are the same in the technique.

Thus, using the above equation, the channel parameters of the first data subcarrier can be estimated as:

That is, through the above steps, the channel estimation matrix when the data symbols are received is obtained according to the phase offset parameter of each receiving antenna when receiving the pilot subcarriers.

In the embodiment of the present invention, both and ^ refer to terms in the channel estimation matrix, except that the former refers to the data subcarrier portion, and the latter refers to the frequency subcarrier portion.

Step 104: Perform phase compensation on the received data subcarrier according to a phase offset parameter of each receiving antenna when receiving a data symbol, and a channel estimation matrix when receiving the data symbol.

In this step, for the payload OFDM symbol after the channel preamble sequence, the first pilot subcarrier in the / ( ) OFDM symbol can be used to estimate

n(l) = a _n (l)-a _n (\)= (/) n = \,...,N is to calculate N phase offset values for N receiving antennas respectively, but in the prior art , Calculate the same single phase offset value for all receive antennas.

Using the above formula, for the ^th data subcarrier in the / OFDM symbol on the N receiving antennas,

According to the formula, after the phase tracking and compensation of the ^th data subcarrier in the OFDM symbol, the detection signal is obtained:

Where [.] ^† is the conjugate transpose operator of the matrix, which is the first subcarrier signal in the zth digital symbol transmitted by the wth antenna (ie, at the time/transmission modulated signal), according to which each reception The received values of the antennas are respectively compensated by the respective phase offset values, and the received values of all the receiving antennas in the prior art are compensated by the same phase offset value, which can effectively reduce the prior art. Phase noise and frequency offset in the case of Tx common source and Rx not common source.

In the embodiment of the present invention, the pilot or data subcarrier (/) is the same.

In the above embodiment, the technical scheme of joint channel estimation and phase compensation is performed for the case where the Tx is common source and the Rx is not common source. FIG. 3 is a schematic flowchart of a phase compensation processing method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:

Step 201: Acquire, from each receiving antenna, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by multiple transmit antennas, and the received signal is calculated according to a non-co-source phase noise factor of different transmit antennas, where Transmitting the plurality of transmitting antennas is not common source, and each receiving antenna is common source;

Specifically, in this step, the system has M transmit antennas and N receive antennas, so that the _wth transmit antennas transmit a channel preamble sequence at time m, and the kth subcarriers in the mth channel preamble sequence are received from the respective receive antennas. The received signals of each subcarrier in the channel estimation preamble sequence obtained by acquiring multiple transmit antennas in time division include:

Where w denotes the wth channel preamble sequence, which is the received signal of the "receiving antenna, ^{η =} , · ", ^Ν , ^w is the common source phase noise at the receiving antenna, which is the non-common source of the wth transmitting antenna The phase noise factor, ^{m = M} , ^ is the first subcarrier in the wth signal preamble sequence, and ^ζ ' denotes inter-carrier interference and channel noise, respectively, and ^Η denotes the channel estimation matrix when receiving the channel estimation preamble sequence.

Step 202: Obtain a channel estimation matrix according to a received signal of each subcarrier in the channel estimation preamble sequence, and acquire, according to the channel estimation matrix, a phase offset parameter of each transmit antenna when transmitting a subcarrier of the data symbol;

In this step, for the first subcarrier in the wth channel preamble sequence, the LS algorithm is used.

«H * en = - - - , N, m = l, ..., M were so obtained on the first channel estimate matrix subcarrier ή ^Α, wherein k is refers to all sub Carrier, including pilot and data subcarriers, c η ή = < η ή + θ m) Step 203, phase offset parameters according to the respective transmit antennas when transmitting subcarriers of data symbols, and the channel estimation matrix pair Receive signals for phase compensation.

Specifically, in this step, for the payload OFDM symbol after the channel preamble sequence, the first pilot subcarrier in the / (/>M) OFDM symbol can be used to estimate

Where [.] ^† is the conjugate transpose operator of the matrix. The process calculates M phase offset values for M transmit antennas respectively, and the phase compensation values of all antennas in the prior art are the same.

For all pilot subcarriers in the / (/ > ) OFDM symbol, there is a phase offset parameter: © _Μ (1) = θ _Μ (1) - α _Μ (ϊ) + φ(1) = ∑Ψ ( /), m = l, ..., M By using the above formula, the phase offset parameter of each transmitting antenna when transmitting subcarriers of data symbols can be obtained according to the channel estimation matrix, and the phase when transmitting the pilot subcarriers The offset parameters are the same.

After tracking the phase shift caused by phase noise and frequency offset. The data needs to be compensated. Using the above formula, for the ^th data subcarrier in the / OFDM symbol on the N receiving antennas,

It can be seen from the formula that after phase tracking and compensation of the ^th data subcarrier in the /0th OFDM symbol, the detection signal can be obtained by using the LS method:

Where [.] ^† is the conjugate transpose operator of the matrix, each transmit antenna is compensated by its own phase offset value, and the phase offset compensation values of all antennas in the prior art are the same, indicating the received data symbol The channel estimation matrix at the time, which is the above calculated ^, the superscript d indicates that only the data subcarriers are processed during the compensation.

The following takes the 2x2 MIM0-0FDM system with the parameters ^M=2 and W ⁼² as an example, assuming that the number of each 0FDM symbol subcarrier is 64. For the load 0FDM symbol after the channel preamble sequence, each symbol There are 52 useful subcarriers, where the 0th to 5th and 59th to 63th subcarriers are always empty subcarriers, and no information is transmitted. The 32nd subcarrier is a DC subcarrier, so no information is transmitted. Subcarrier ((/, /, specific reference may be divided as shown in FIG. 4, wherein the useful subcarriers, the sub-carrier 8 _¾ P _E _{{10,13,22,25,39,42,51,54}} the pilot For the Tx common source, Rx is not common source, the channel estimation preamble sequence is shown in Figure 5. Here, the value of each item in the preamble sequence is 1 or -1. Like the payload OFDM data symbol, in Figure 5 Eight pilot subcarriers are inserted in each channel estimation preamble sequence, and the number of pilot subcarriers is consistent with the number of pilot subcarriers in the payload OFDM data symbols.

First, for the first pilot subcarrier in the first channel preamble sequence, according to step 102 in the embodiment shown in FIG.

(1)

We n = l, 2

(1)

Then, using 8 pilot subcarriers in the 2nd channel preamble sequence received by the two receiving antennas, it can be estimated

Thus, according to step 103 in the embodiment shown in FIG. 1, the channel parameters of the first data subcarrier can be estimated as:

After obtaining the channel parameter matrix ^rf , for the load OFDM symbol after the channel preamble sequence, according to step 104 in the embodiment shown in FIG. 1, using 8 pilot subcarriers in the / (/ > 2) OFDM symbols, Estimated

Finally, after phase tracking and compensation of the first data subcarrier in the OFDM symbol, a detection signal is obtained:

H. H.

Still taking a 2x2 MIMO-OFDM system as an example, for the case where the Tx is not common source and the Rx common source, the load OFDM symbol parameter setting can be seen in FIG. 4, that is, the number of subcarriers per OFDM symbol is 64, and the load after the channel preamble sequence There are 52 useful subcarriers in the OFDM symbol, and the 0th to 5th and 59th to 63th subcarriers and the 32nd DC subcarrier are null subcarriers. Among the subcarriers carrying the OFDM symbol, 8 subcarriers P _e {10, 13, 22, 25, 39, 42, 51, 54} are pilot subcarriers. Different from the first embodiment, the channel estimation preamble sequence is as shown in FIG. 6. Wherein, -1, 1}, and at this time, the pilot subcarrier is not inserted in the channel estimation preamble sequence.

First, according to step 202 in the embodiment shown in FIG. 2, for the first subcarrier in the two channel preamble sequences,

This will give the channel parameter matrix on the first subcarrier ή ^Α.

For the payload OFDM symbol after the channel preamble sequence, according to step 203 in the embodiment shown in FIG. 2, using the Pth pilot subcarrier in the / (/ > 2) OFDM symbol, the following can be estimated:

{i)

For all pilot subcarriers in / (/ > 2) OFDM symbols, there is

©,(/) = ∑Ψί(/), Θ ₂ (/) = ∑Ψ*(/) Finally, phase compensation is performed on the first data subcarrier in the / (/ > 2) OFDM symbols on the receiving antenna. Available detection signals:

0

The technical solution provided by the embodiments of the present invention can be applied to point-to-point communication in a high-speed backhaul network scenario, or in two-way communication between a mobile communication vehicle and a base station. In this case, the antenna spacing of the mobile communication vehicle is generally smaller than that of the base station. The antenna spacing is applied to the multi-user cooperative MIM0 in the mobile communication cellular communication scenario. In this scenario, the antennas on the base station side can be common source, and the antennas on the user side are not common sources.

The technical solution provided by the foregoing embodiments of the present invention can be applied to various communication systems based on the MIM0-0FDM technology. For communication systems with wide bandwidth, high frequency and high transmission rate, phase noise and frequency offset The impact is extremely serious. According to the technical solution provided by the embodiment of the present invention, a low complexity method is proposed to compensate for signal distortion caused by phase noise and frequency offset by jointly optimizing channel estimation and phase tracking. Thereby the bit error bit rate is greatly reduced.

Figure 7 shows a comparison of the BER performance of the channel estimation and phase compensation algorithm of the present invention with prior art algorithms in the case of Tx common source, Rx not common source. The specific parameters of the communication system can be set as follows: 2x2 MIM0 technology, 128 subcarriers per OFDM symbol, 8 subcarriers are pilot signals, the signal is 64QAM modulation, and the channel is Additive White Gaussian Noise (Additive White Gaussian Noise, Hereinafter referred to as: AWGN, the system frequency offset is 2ppm, and its Wiener phase noise is -80dB@100kHz, that is, the phase noise is _80dB when the frequency offset is 100kHz. As can be seen from Figure 9, the common source at Tx , the Rx case without a common source, the use of the prior art solutions, wherein the bit error rate (BER) with little noise ratio (SNR) change, remaining at ^a level of 10-, proposed the use of embodiments of the invention Joint channel estimation and phase compensation scheme for Tx common source and Rx non-common source, where the bit error bit rate (BER) decreases significantly with increasing signal-to-noise ratio (SNR), and the signal-to-noise ratio is close to 30. when the bit error rate is reduced to about ^10-4.

Figure 8 shows a comparison of the BER performance of the channel estimation and phase compensation algorithm of the present invention with prior art algorithms in the case where Tx is not common source, Rx common source. For the specific parameter setting, refer to the technical solution of FIG. 9. As shown in FIG. 8, in the case where the Tx is not common source and the Rx is common source, the prior art scheme is adopted, where the bit error bit rate (BER) varies with the signal to noise ratio (SNR). ) little change, remaining at ^a level of 10-, utilize a common source Tx provided by the embodiments of the present invention, the joint channel estimation Rx is not the case with the common source phase compensation scheme in which the bit error rate (BER) with the ratio (SNR) is increased significantly decreased, the value of signal to noise ratio approaches 30, the bit error rate is reduced to about ^10-4.

FIG. 9 is a schematic structural diagram 1 of a phase compensation processing apparatus according to an embodiment of the present invention. As shown in FIG. 9, the method includes a first acquiring module 11, a second acquiring module 12, a third acquiring module 13, and a first phase compensating module 14, The first obtaining module 11 is configured to obtain, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence that is simultaneously sent by multiple transmitting antennas, where the received signal is not according to different receiving antennas. The common source phase noise factor is calculated, wherein the plurality of transmit antennas are common sources, and the respective receive antennas are not common source; the second obtaining module 12 is configured to obtain each according to the received signals of the at least one first pilot subcarrier. The phase offset parameter of the receiving antenna when receiving the channel estimation preamble sequence, and acquiring the channel estimation matrix when receiving the data symbol according to the phase offset parameter of each receiving antenna when receiving the pilot subcarrier; the third acquiring module 13 From each Receiving, by the receiving antenna, a received signal of at least one second pilot subcarrier in the data symbol, where the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, and according to the at least one second pilot The received signal of the carrier acquires a phase offset parameter of each receiving antenna when receiving the data symbol; the first phase compensation module 14 is configured to: according to the phase offset parameter of each receiving antenna when receiving the data symbol, and when receiving the data symbol The channel estimation matrix performs phase compensation on the received data subcarriers.

In the above embodiments of the present invention, the phase offset parameters of each receiving antenna when receiving data symbols can be obtained, and the received values of each receiving antenna are respectively compensated by respective phase offset values, which can effectively reduce the prior art. Phase noise and frequency offset effects in the case of Tx common source and Rx not common source.

In the foregoing embodiment of the present invention, the first acquiring module is specifically configured to: obtain, by using the receiving antennas, the received signals of the at least one first pilot subcarrier in the channel estimation preamble sequence simultaneously transmitted by the multiple receiving antennas, including:

— (/)— • 0 " ~e ^jm · • 0 ―

― s ^k (l) + ICI _l + z _l

(/) - 0 · 0 · where w is the number of receiving antennas, M is the number of transmitting antennas, z is the first channel preamble sequence, / = ι,., n, y ^kl , is the reception of the "receiving antenna" The signal, ^{n =} ", ^N , ^ ^w is the non-co-source phase noise factor of the "receiving antenna", ^ ^w is the common source phase offset of the transmitting antenna, and ^( ^ζ ) is the first pilot subcarrier. ^c ^ and respectively represent inter-carrier interference and channel noise, and ^H denotes a channel estimation matrix when receiving a channel estimation preamble sequence.

Further, the second acquiring module 12 obtains phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier, including: a (l) = V ^{( )} Where (·) is the angle operator, = _H ' ⁽ "» ⁽¹⁾⁾ U ^k = Υ H ^K , n = \,...,N, w = l"..,M.

The third obtaining module 13 obtains the channel estimation matrix when the received data symbols are obtained according to the phase offset number of each receiving antenna when receiving the pilot subcarriers, including:

The phase compensation of the received data subcarrier by the first phase compensation module 14 includes:

Wherein, ^[ '] τ is the conjugate transpose operator matrix, the first digit symbols W th antenna transmission in a first ^ data _subcarriers, ά Λ η represents a phase of each receiving antenna when receiving data symbols Offset value.

10 is a schematic structural diagram 2 of a phase compensation processing apparatus according to an embodiment of the present invention. As shown in FIG. 10, the apparatus includes a fourth acquiring module 21, a fifth obtaining module 22, a sixth obtaining module 23, and a second phase compensating module. 24, wherein the fourth obtaining module 21 is configured to obtain, from each receiving antenna, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by multiple transmit antennas, and the received signal is a non-co-source phase according to different transmit antennas. The noise factor is calculated, wherein the transmitting the plurality of transmitting antennas is not common source, and the receiving antennas are common sources; and the fifth obtaining module 22 is configured to obtain a channel estimation matrix according to the received signals of each subcarrier in the channel estimation preamble sequence. The sixth obtaining module 23 is configured to acquire a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol according to the channel estimation matrix; and the second phase compensation module 24 is configured to send the data symbol according to the each transmitting antenna. Phase offset parameter for subcarriers, and phase estimation of the received signal by the channel estimation matrix .

The technical solution provided by the foregoing embodiments of the present invention, in which the phase offset values are respectively calculated for different transmitting antennas, and the corresponding phase compensation is performed, which can effectively reduce the phase in the case where the common source and the Rx are not common sources in the prior art. Noise and frequency offset effects.

In the above implementation of the present invention, the fourth acquisition module 21 acquires, by each of the receiving antennas, the received signals of the sub-carriers in the channel estimation preamble sequence that are time-divisionally transmitted by the multiple transmit antennas, including:

Where w represents the wth channel preamble sequence, is the received signal of the "receiving antenna", ^{η = λ} , ^Ν is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^^ is the transmit antenna is not common source phase noise factor, ^{m = m, m} is the number of transmit antennas, for the first w channel preamble sequence in the ^k th subcarrier, ^IC, and ^{Ζ ι} respectively represent inter-carrier interference and channel noise, H ^k denotes a channel estimation matrix when receiving a channel estimation preamble sequence.

Further, the fifth obtaining module 22 obtains the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence, including:

(m)

Hi ■ « H* where, a n) = φ ηή + θ». The sixth obtaining module acquires phase offset parameters of each transmitting antenna when transmitting the subcarriers of the data symbols according to the channel estimation matrix, including:

@ _m (/) - 6' _m (/) - a _m (l) + ^(/)

Where is the first data symbol sent by the transmitting antenna.

Moreover, the second phase compensation module performs phase compensation on the received signal according to the phase offset parameter of each transmit antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix includes:

Wherein, the signal indicating the ^th subcarrier in the data symbol transmitted by the wth transmitting antenna indicates the signal of the first subcarrier in the data symbol received by the receiving antenna, and the conjugate transpose operator of the matrix indicates the receiving data symbol Time channel estimation matrix.

The embodiment of the invention further provides a communication device, the communication device comprising:

a processor, configured to obtain a channel estimate for simultaneous transmission of multiple transmit antennas from each receive antenna a received signal of at least one first pilot subcarrier in the preamble sequence, the received signal being calculated according to a non-co-source phase noise factor of different receiving antennas; acquiring according to the received signal of the at least one first pilot subcarrier a phase offset parameter of each receiving antenna when receiving a channel estimation preamble sequence, and acquiring a channel estimation matrix when receiving the data symbol according to a phase offset parameter of each receiving antenna when receiving the pilot subcarrier; from each receiving antenna Obtaining a received signal of at least one second pilot subcarrier in the data symbol, where the received signal is calculated according to a non-co-source phase noise factor of different receiving antennas, and according to the receiving of the at least one second pilot subcarrier And acquiring, by the signal, a phase offset parameter of each receiving antenna when receiving the data symbol; performing, according to the phase offset parameter of each receiving antenna when receiving the data symbol, and the channel estimation matrix when receiving the data symbol, performing the received data subcarrier Phase compensation.

The obtaining, by the processor, the received signals of the at least one first pilot subcarrier in the channel estimation preamble sequence that are simultaneously sent by the multiple transmit antennas from each of the receiving antennas includes:

— (/)— • 0 " · * · ^H IM ~e ^jm · • 0 ―

― s ^k (l) + ICI _l + z _l (/)— 0 · ^H Nl · . . NM 0 · where w is the number of receiving antennas, M is the number of transmitting antennas, and z is the first channel preamble sequence, / = ι,. , n , y ^kl , is the received signal of the "receiving antenna, ^{n =} ", ^N , ^ ^w is the non-co-source phase noise factor of the "receiving antenna", ^ ^w is the common source of the transmitting antenna The phase offset is straight, ^( ^ζ ) is the first pilot subcarrier, ^c ^ and respectively represent inter-carrier interference and channel noise, and ^H represents the channel estimation matrix when the channel estimation preamble sequence is received.

Obtaining, by the processor, the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier includes:

a (l) = V ^{( )} where (·) is the angle operator, HH ^k = y H ^K , n = \,..., N w = l" .., M.

The channel estimation matrix obtained by the processor according to the phase offset parameter of each receiving antenna when receiving the pilot subcarrier includes:

The processor performs phase compensation on the received data subcarriers including:

Wherein, ^[ '] τ conjugate transpose operator matrix, the first digit symbols W th antenna transmission in a first ^ data _subcarriers, ά Λ η represents a phase of each receiving antenna when receiving data symbols Offset value.

The embodiment of the invention further provides another communication device, including:

a processor, configured to obtain, from each receiving antenna, a received signal of each subcarrier in a channel estimation preamble sequence that is sent by multiple transmit antennas, and the received signal is calculated according to a non-co-source phase noise factor of different transmit antennas; Acquiring a channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence; acquiring, according to the channel estimation matrix, a phase offset parameter of each transmitting antenna when transmitting a subcarrier of the data symbol; according to each of the transmitting antennas A phase offset parameter when a subcarrier of the data symbol is transmitted, and the channel estimation matrix performs phase compensation on the received signal.

The above processor obtains channel estimation preambles for time division transmission of multiple transmit antennas from each receiving antenna

Where w denotes the wth channel preamble sequence, which is the received signal of the "receiving antenna", ^{η = λ} , ^Ν is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^^ is the wth The non-co-source phase noise factor of the transmitting antenna, ^{m =} , ^M , M is the number of transmitting antennas, ^ is the ^kth subcarrier in the wth channel preamble sequence, and ^Ζ ι denotes inter-carrier interference and channel noise, respectively Acoustic, ^H represents the channel estimation matrix when receiving the channel estimation preamble sequence.

The foregoing processor obtains a channel estimation matrix according to a received signal of each subcarrier in the channel estimation preamble sequence, including:

Where a jn = φ η + θ».

The phase offset parameters of the above-mentioned processor according to the channel estimation matrix when the ear water transmitting antenna transmits the subcarrier of the data symbol include:

® _Μ (1) = θ _Μ (1) - α _Μ {\) + φ{1) where represents the first data symbol transmitted by the transmitting antenna.

The processor performs phase compensation on the received signal according to the phase offset of each transmit antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix includes:

-;ø, (/)

Χι e

Η Η Η

Wherein, the signal indicating the first subcarrier in the data symbol transmitted by the wth transmitting antenna indicates the signal of the ^th subcarrier in the data symbol received by the "receiving antenna", and ['] ^† is the conjugate transpose operator of the matrix , indicates the channel estimation matrix when receiving data symbols.

One of ordinary skill in the art will appreciate that all or a portion of the various method embodiments described above may be implemented by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as ROM, RAM, disk or optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A phase compensation processing method, characterized by including:

Obtain the received signal of at least one first pilot subcarrier in the channel estimation preamble sequence sent simultaneously by multiple transmitting antennas from each receiving antenna, where the received signal is calculated based on the non-common source phase noise factors of different receiving antennas, Wherein the plurality of transmitting antennas have a common source, and the respective receiving antennas do not have a common source;

Obtain the phase offset parameter of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier, and obtain the phase offset parameter of each receiving antenna when receiving the pilot subcarrier according to the received signal of the at least one first pilot subcarrier. Get the channel estimation matrix when receiving data symbols;

Obtain the received signal of at least one second pilot subcarrier in the data symbol from each receiving antenna, the received signal is calculated based on the non-common source phase noise factors of different receiving antennas, and based on the at least one second pilot The received signal of the frequency subcarrier obtains the phase offset parameter of each receiving antenna when receiving data symbols;

Phase compensation is performed on the received data subcarriers according to the phase offset parameters of each receiving antenna when receiving data symbols and the channel estimation matrix when receiving data symbols.

2. The phase compensation processing method according to claim 1, characterized in that: obtaining from each receiving antenna a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence sent by multiple transmitting antennas simultaneously include:

— (/)—

一+ _ICIl + _zl

Among them, W is the number of receiving antennas, M is the number of transmitting antennas, Z represents the /th channel preamble sequence, ¹ = 1, ^... ^W is the non-common source phase noise factor of the 'th receiving antenna, ^ ^w is the common source phase offset of the transmitting antenna, ^( ^Ζ ) is the th pilot subcarrier, ^C ^ and ^ represent inter-carrier interference respectively and channel noise, ^H represents the channel estimation matrix when receiving the channel estimation preamble sequence.

3. The phase compensation processing method according to claim 2, characterized in that, the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence are obtained according to the received signal of the at least one first pilot subcarrier. include: y _n )

a „(/) = ∑■

s ^K (l)W _n where, (.) is the angle operator, = H ' ⁽¹ , =∑H _n ^k _m ^ n = l, . . .,N , w = l" . ., M.

4. The phase compensation processing method according to claim 3, characterized in that, obtaining the channel estimation matrix when receiving data symbols according to the phase offset parameters of each receiving antenna when receiving pilot subcarriers includes:

Among them, «ω is the phase offset parameter caused by the common phase offset of the transmitting antenna and the phase offset of the receiving antenna n for the first channel preamble symbol. It is a positive integer, and H is the ^th received data symbol. channel estimation parameters for data subcarriers.

5. The phase compensation processing method according to claim 4, wherein the phase compensation of the received data subcarriers includes:

(/)

H. H. H

¾(where ['] ^† is the conjugate transpose operator of the matrix, ( ^z ) is the ^th data subcarrier in the th digital symbol transmitted by the wth antenna, indicating that each receiving antenna receives data symbols phase offset value.

6. A phase compensation processing method, characterized by including:

The received signals of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in a time-shared manner are obtained from each receiving antenna. The received signals are calculated based on the non-common source phase noise factors of different transmitting antennas, where the multiple transmitting antennas are The transmitting antennas do not have a common source, and the receiving antennas have a common source;

Obtain the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence; Obtain the phase offset parameter of each transmitting antenna when transmitting the subcarrier of the data symbol according to the channel estimation matrix;

Phase compensation is performed on the received signal according to the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols and the channel estimation matrix.

7. The phase compensation processing method according to claim 6, characterized in that: said from each Obtaining the received signals of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in a time-sharing manner on the receiving antenna includes:

Among them, w represents the wth channel preamble sequence, ^m is the received signal of the "th receiving antenna, ^{n =} , ^N , W is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^^ is the Non-common source phase noise factor of W transmit antennas, ^{m =} , , ^M , M is the number of transmit antennas, ^ is the k-th subcarrier in the W-th channel preamble sequence, ^IC and represent inter-carrier interference and channel noise respectively , ^ represents the channel estimation matrix when receiving the channel estimation preamble sequence.

8. The phase compensation processing method according to claim 7, wherein the obtaining the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence includes:

y„ ^k (m)

■ «i

H, H* where a n) = φ ηή + θ».

9. The phase compensation processing method according to claim 8, wherein the obtaining the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols according to the channel estimation matrix includes:

@ _m (/) - 6' _m (/)-a _m (l) + ^(/)

Among them, represents the th data symbol sent by the transmitting antenna.

10. The phase compensation processing method according to claim 9, characterized in that: phase compensation is performed on the received signal according to the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols, and the channel estimation matrix include:

Among them, represents the signal of the sub-carrier in the data symbol sent by the w-th transmitting antenna, represents the signal of the sub-carrier in the data symbol received by the M-th receiving antenna, [ is the conjugate transpose operator of the matrix, represents the received data Channel estimation matrix at symbol time.

11. A phase compensation processing device, characterized in that it includes:

The first acquisition module is configured to acquire, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence sent simultaneously by multiple transmitting antennas, where the received signal is a different signal based on different receiving antennas. The source phase noise factor is calculated, wherein the multiple transmit antennas have a common source, and the respective receiving antennas do not have a common source;

The second acquisition module is configured to acquire the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier, and to obtain the phase offset parameter of each receiving antenna when receiving the pilot subcarrier according to the received signal of the at least one first pilot subcarrier. The phase offset parameter when the carrier is used to obtain the channel estimation matrix when receiving data symbols;

The third acquisition module is used to acquire the received signal of at least one second pilot subcarrier in the data symbol from each receiving antenna, where the received signal is calculated based on the non-common source phase noise factors of different receiving antennas, and is calculated according to The received signal of the at least one second pilot subcarrier obtains the phase offset parameter of each receiving antenna when receiving data symbols;

The first phase compensation module is used to perform phase compensation on the received data subcarriers according to the phase offset parameters of each receiving antenna when receiving data symbols and the channel estimation matrix when receiving data symbols.

12. The phase compensation processing device according to claim 11, characterized in that the first acquisition module is configured to acquire at least one first preamble from each receiving antenna in the channel estimation preamble sequence sent simultaneously by multiple transmitting antennas. The received signal of the frequency subcarrier includes:

— (/)— • 0 " · * · ^H IM ~e ^jm · • 0 ―

― s ^k (l) + ICI _l + z _l (/)— 0 · ^H Nl · . . NM 0 · Among them, W is the number of receiving antennas, M is the number of transmitting antennas, / represents the /th channel preamble sequence, i = i,. . .,n,y^ ^k ) is the received signal of the "th receiving antenna, ⁿ = , ^N , ^w is the non-common source phase noise factor of the "th receiving antenna, ^ ^w is the common source phase noise factor of the transmitting antenna The source phase offset is straight, ζ( ^ζ ) is the th pilot subcarrier, and ^ζ ' represent inter-carrier interference and channel noise respectively, ^{and Η} represents the channel estimation matrix when receiving the channel estimation preamble sequence.

13. The phase compensation processing device according to claim 12, characterized in that, the second acquisition module acquires the signal of each receiving antenna when receiving the channel estimation preamble sequence according to the received signal of the at least one first pilot subcarrier. Phase offset parameters include: y _n )

a „(/) = ∑■

14. The phase compensation processing device according to claim 13, wherein the third acquisition module acquires the channel estimation matrix when receiving data symbols according to the phase offset parameters of each receiving antenna when receiving pilot subcarriers, including: :

15. The phase compensation processing device according to claim 14, wherein the first phase compensation module performing phase compensation on the received data subcarriers includes:

(/)

H. H. H

16. A phase compensation processing device, characterized in that it includes:

The fourth acquisition module is used to acquire the received signal of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in time from each receiving antenna. The received signal is calculated based on the non-common source phase noise factors of different transmitting antennas. Obtain, wherein the plurality of transmitting antennas are not from a common source, and the respective receiving antennas are from a common source;

The fifth acquisition module is used to acquire the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence;

A sixth acquisition module, configured to acquire the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols according to the channel estimation matrix;

The second phase compensation module is used to transmit data symbols according to the subcarriers of each transmitting antenna. The phase offset parameter of the wave time, and the channel estimation matrix perform phase compensation on the received signal.

17. The phase compensation processing device according to claim 16, wherein the fourth acquisition module acquires the received signals of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in a time-divided manner from each receiving antenna, including: :

Among them, w represents the w-th channel preamble sequence, ^y » is the received signal of the "th receiving antenna, ^{n =} , ^N , W is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^w is the W-th receiving antenna The non-common source phase noise factor of a transmitting antenna, ^m= , ^M , M is the number of transmitting antennas, ^ is the k-th subcarrier in the W-th channel preamble sequence, ^IC and represent inter-carrier interference and channel noise respectively, ^ Represents the channel estimation matrix when receiving the channel estimation preamble sequence.

18. The phase compensation processing device according to claim 17, wherein the fifth acquisition module acquires the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence including:

where a n) = φ ηή + θ».

19. The phase compensation processing device according to claim 18, wherein the sixth acquisition module acquires the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols according to the channel estimation matrix, including:

@ _m (/) - 6' _m (/) -a _m (l) + ^(/)

Among them, represents the th data symbol sent by the transmitting antenna.

20. The phase compensation processing device according to claim 19, characterized in that, the second phase compensation module is based on the phase offset parameter of each transmitting antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix pair Phase compensation of received signals includes:

Among them, represents the signal of the ^th subcarrier in the data symbol sent by the Wth transmitting antenna, represents the signal of the ^th subcarrier in the data symbol received by the "th receiving antenna, ['] ^† is the conjugate transpose operator of the matrix , represents the channel estimation matrix when receiving data symbols.

21. A communication device, characterized by including:

A receiving antenna, used to receive signals transmitted by a transmitting antenna, wherein the plurality of transmitting antennas have a common source, and the respective receiving antennas do not have a common source;

A processor configured to obtain, from each receiving antenna, a received signal of at least one first pilot subcarrier in a channel estimation preamble sequence sent simultaneously by multiple transmitting antennas, where the received signal is a non-common source phase according to different receiving antennas. The noise factor is calculated; and the phase offset parameters of each receiving antenna when receiving the channel estimation preamble sequence are obtained according to the received signal of the at least one first pilot subcarrier, and according to the phase offset parameters of each receiving antenna when receiving the pilot subcarrier. The phase offset parameter obtains the channel estimation matrix when receiving data symbols; obtains the received signal of at least one second pilot subcarrier in the data symbol from each receiving antenna, and the received signal is a non-common source according to different receiving antennas The phase noise factor is calculated, and the phase offset parameter of each receiving antenna when receiving data symbols is obtained according to the received signal of the at least one second pilot subcarrier; According to the phase offset of each receiving antenna when receiving data symbols, Shift parameters, and the channel estimation matrix when receiving data symbols perform phase compensation on the received data subcarriers.

22. The communication device according to claim 11, wherein the processor obtains from each receiving antenna the reception of at least one first pilot subcarrier in the channel estimation preamble sequence sent simultaneously by multiple transmitting antennas. Signals include:

— (/)— • 0 " ~e ⁱ · • 0 ―

^ask (l) + ICI _l + z _l

0 · ^H Nl · . . NM 0 · Among them, w is the number of receiving antennas, M is the number of transmitting antennas, z represents the z-th channel preamble sequence, 1 = 1,. . .,η, ^( is the "th receiving The received signal of the antenna, ^η = , ^N , ^W is the non-common source phase noise factor of the "th receiving antenna, ^ ^w is the common source phase offset of the transmitting antenna, ^( ^Ζ ) is the th pilot subcarrier , ^C ^ and ^ represent inter-carrier interference and channel noise respectively, ^{and H} represents the channel estimation matrix when receiving the channel estimation preamble sequence.

23. The communication device according to claim 22, characterized in that, the processor obtains the channel information of each receiving antenna before receiving channel estimation according to the received signal of the at least one first pilot subcarrier. The phase offset parameters during the pilot sequence include:

y _n )

a ·„(/) = ∑■

s ^K (l)W _nwhere , (·) is the angle operator, = H '("» ⁽¹ , =∑H _n ^k _m ^ n = \ . . .,N , w = l" .., M.

24. The communication device according to claim 23, wherein the processor obtains the channel estimation matrix when receiving data symbols based on the phase offset parameters of each receiving antenna when receiving pilot subcarriers, including:

25. The communication device according to claim 24, wherein the processor performing phase compensation on the received data subcarriers includes:

-j\

H.

Among them, ['] ^† is the conjugate transpose operator of the matrix, is the ^th data subcarrier in the digital symbol transmitted by the wth antenna, and represents the phase offset value of each receiving antenna when receiving data symbols. .

26. A communication device, characterized by including:

A receiving antenna, used for receiving signals transmitted by a transmitting antenna, wherein the plurality of transmitting antennas do not have a common source, and each of the receiving antennas has a common source;

A processor configured to obtain, from each receiving antenna, the received signal of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in a time-sharing manner, where the received signal is calculated based on the non-common source phase noise factors of different transmitting antennas; Obtain the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence; Obtain the phase offset parameter of each transmitting antenna when transmitting the subcarrier of the data symbol according to the channel estimation matrix; According to the phase offset parameter of each transmitting antenna when transmitting the subcarrier of the data symbol; The phase offset parameter when transmitting the subcarrier of the data symbol, and the channel estimation matrix performs phase compensation on the received signal.

27. The communication device according to claim 26, wherein the processor obtains the received signals of each subcarrier in the channel estimation preamble sequence sent by multiple transmitting antennas in a time-divided manner from each receiving antenna, including:

Among them, w represents the wth channel preamble sequence, ^m is the received signal of the "th receiving antenna, ^{n =} , ^N , W is the number of receiving antennas, ^ ^w is the common source phase noise at the receiving antenna, ^w is the Wth receiving antenna The non-common source phase noise factor of a transmitting antenna, ^m= , ^M , M is the number of transmitting antennas, ^ is the k-th subcarrier in the W-th channel preamble sequence, ^IC and represent inter-carrier interference and channel noise respectively, ^ Indicates the channel estimation matrix when receiving the channel estimation preamble sequence.

28. The communication device according to claim 27, characterized in that, the processor obtaining the channel estimation matrix according to the received signal of each subcarrier in the channel estimation preamble sequence includes:

Among them, α»Φ, + _θΜ {η.

29. The communication device according to claim 28, wherein the processor obtains the phase offset parameters of each transmitting antenna when transmitting subcarriers of data symbols according to the channel estimation matrix, including:

@ _m (/) - 6' _m (/) - a _m (l) + ^(/)

Among them, z represents the /th data symbol sent by the transmitting antenna.

30. The communication device according to claim 29, characterized in that, the processor performs phase compensation on the received signal according to the phase offset parameter of each transmitting antenna when transmitting the subcarrier of the data symbol, and the channel estimation matrix. include:

Among them, ^ represents the signal of the sub-carrier in the data symbol sent by the w-th transmitting antenna, ^ ^(/ ) represents the signal of the sub-carrier in the data symbol received by the w-th receiving antenna, ['] ^† is the moment The conjugate transpose operator of the matrix represents the channel estimation matrix when receiving data symbols.