CN102457360A - Pre-coding processing method, pre-coding processing device and base station - Google Patents

Abstract

The invention provides a pre-coding processing method, a pre-coding processing device and a base station. The pre-coding processing method comprises the following steps of: acquiring spatial channel relevance parameters of a communication system of the base station, and acquiring interference avoiding parameters according to the spatial channel relevance parameters; according to the interference avoiding parameters, acquiring an element value of a fixed element of a pre-coding matrix to be constructed; according to an interference alignment algorithm, acquiring element values of the elements in the pre-coding matrix to be constructed besides the fixed element; according to the element value of the fixed element of the pre-coding matrix to be constructed and the element values of the elements in the pre-coding matrix to be constructed besides the fixed element, constructing a pre-coding matrix; and according to the pre-coding matrix, carrying out pre-coding processing to data streams. The pre-coding processing method, the pre-coding processing device and the base station, provided by the invention, have an effective inhibition function to interference.

Description

Recoding processing method, precoding processing device and base station

Technical field

The present embodiments relate to MIMO technique, more particularly to a kind of recoding processing method, precoding processing device and base station, belong to communication technical field.

Background technology

Interference problem between wireless communication technology field, signal is to influence the critical bottleneck of its development, can not also thoroughly solve the interference problem between signal by technological approaches at present, such as the capacity problem of two users' Gauss interference signal, can not all be resolved always.

At present it is a kind of solve interference problem thinking be, between each signal transmitter share respective channel information, rather than share data to be launched, then using interference alignment (Interference Alignment, referred to as：IA method), the signal space that can be handled to correspondence receiver that the interference from other emitters is put together automatically, so as to realize that interference is eliminated.Existing interference alignment schemes assume that arbitrary Gauss symbol, its interference is random, interference space is considered as unstructuredness, and interference alignment is that desired interference is snapped into the space of smaller dimension, and transmits useful signal using remaining " clean " dimension.One of interference alignment schemes important hypothesis is that, when emitter has multiple transmitting antennas, the corresponding channel of each antenna is all independent identically distributed.

But in actual wireless communication system, the corresponding channel of same each antenna of emitter all has certain correlation.Interference is eliminated by the way of above-mentioned interference alignment, effectively reduction interference can not be reached, the purpose of transmission rate is improved.

The content of the invention

The embodiment of the present invention provides a kind of recoding processing method, precoding processing device and base station, can effectively reduce interference, and improve transmission rate.

The invention provides a kind of recoding processing method, including：

The spatial channel correlation parameter of communication system where obtaining base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter；

According to the element value of the fixed element of interference avoidance parameter acquiring pre-coding matrix to be built；

The element value of the other elements in addition to fixed element in pre-coding matrix to be built is obtained according to interference alignment algorithm；

According to the element value of other elements builds pre-coding matrix in addition to fixed element in the element value and the pre-coding matrix to be built of the pre-coding matrix fixed element to be built of acquisition；

Precoding processing is carried out to data stream according to the pre-coding matrix.

Present invention also offers a kind of precoding processing device, including：

Parameter acquisition module, the spatial channel correlation parameter of communication system where for obtaining base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter；

First computing module, the element value for the fixed element according to interference avoidance parameter acquiring pre-coding matrix to be built；

Second computing module, the element value for obtaining the other elements in addition to fixed element in pre-coding matrix to be built according to interference alignment algorithm；

Module is built, for the element value of other elements to build pre-coding matrix in addition to fixed element in the element value and the pre-coding matrix to be built of the pre-coding matrix fixed element to be built according to acquisition；

Coded treatment module, for carrying out precoding processing to data stream according to the pre-coding matrix.

Present invention also offers a kind of base station, the base station includes above-mentioned precoding processing device.

Recoding processing method provided in an embodiment of the present invention, precoding processing device and base station, the spatial channel correlation parameter of communication system where by obtaining base station, and interference avoidance parameter is further obtained, to calculate the element value for the fixed element for obtaining pre-coding matrix, carry out interference avoidance；Then element value for obtaining other elements in pre-coding matrix is calculated it according to interference, precoding is carried out to data stream using the pre-coding matrix of above-mentioned acquisition, is alignd while taking interference avoidance and disturbing, the inhibitory action to interference can be effectively played.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic flow sheet of recoding processing method embodiment one of the present invention；

The schematic diagram that Fig. 2A aligns for interference；

Fig. 2 B are the schematic diagram of interference avoidance；

Fig. 2 C are the schematic diagram that interference avoidance coordinates interference alignment；

Fig. 3 is the schematic flow sheet of recoding processing method embodiment two of the present invention；

Fig. 4 is the schematic flow sheet of recoding processing method embodiment three of the present invention；

Fig. 5 is the structural representation of precoding processing device embodiment one of the present invention；

Fig. 6 is the structural representation of precoding processing device embodiment two of the present invention.

Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

The invention provides a kind of recoding processing method, Fig. 1 is the schematic flow sheet of recoding processing method embodiment one of the present invention, as shown in figure 1, comprising the following steps：

Step 101, the spatial channel correlation parameter for obtaining base station place communication system, and according to the spatial channel correlation parameter acquiring interference avoidance parameter, this step is with multiple base stations, in the communication system of multiple transmitting antennas, consider the channel relevancy between each transmitting antenna, spatial channel correlation parameter therein refers to the parameter of effectively virtual angle class, and its change in a communications system is relatively slow；

Step 102, the element value according to the fixed element of interference avoidance parameter acquiring pre-coding matrix to be built；This step is on the basis of above-mentioned steps, the further calculating that interference avoidance is carried out according to above-mentioned interference avoidance parameter, obtain the data of fixed element part in pre-coding matrix, i.e. it is contemplated that the parameter such as base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station and avoidance user's collection, is calculated according to the principle of interference avoidance；

Step 103, the element value for obtaining according to interference alignment algorithm the other elements in addition to fixed element in pre-coding matrix to be built, on the basis of above-mentioned carry out interference avoidance calculating, the also further principle alignd using interference, interference signal is snapped into the treatable interference space of user, obtain the element value of the other elements in addition to above-mentioned fixed element in pre-coding matrix, so that the pre-coding matrix obtained in this method, while considering interference avoidance and interference two factors of alignment；

Step 104, the element value according to the above-mentioned fixed element of acquisition and the element value of other elements builds pre-coding matrix in addition to fixed element, and further precoding processing is carried out to data stream according to the pre-coding matrix.

The recoding processing method that the above embodiment of the present invention is provided, the spatial channel correlation parameter of communication system where by obtaining base station, and interference avoidance parameter is further obtained, to calculate the element value for the fixed element for obtaining pre-coding matrix, carry out interference avoidance；Then element value for obtaining other elements in pre-coding matrix is calculated it according to interference, precoding is carried out to data stream using the pre-coding matrix of above-mentioned acquisition, the inhibitory action to interference can be played.

In specific implementation process, interference avoidance parameter in the above embodiment of the present invention can specifically include base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station and avoidance user's collection, some other interference avoidance parameters can also be included in addition, such as consider front and rear situation of change, interference avoidance collection now is on the basis of including aforementioned four parameter, it can further include the change collection of the corresponding effective virtual emission angle position in base station, change collection of the corresponding effective signal radiated position in base station etc..

In addition, spatial channel correlation parameter in above-described embodiment, it is relatively fixed, therefore can be according to spatial channel correlation parameter with offline mode acquisition interference avoidance parameter, and store in a storage module, the element value of the above-mentioned fixed element according to interference avoidance parameter acquiring pre-coding matrix can be the acquisition interference avoidance parameter from memory module；Can also be to be calculated in real time with the interference avoidance parameter of communication system where obtaining base station according to the coefficient of performance of communication system in addition.

In another embodiment, after the element value of fixed element in the pre-coding matrix according to interference avoidance parameter acquiring, avoidance user, which can also further be obtained, concentrates each user corresponding, for making data receiver to the data flow received disturb the balanced device of elimination；And in pre-coding matrix is obtained according to interference alignment algorithm in addition to fixed element after the element value of other elements, base station can also further be obtained remove avoidance user in a communications system and concentrate each corresponding with outdoor other users, for making data receiver to the data flow received disturb the balanced device of elimination, specifically can be using least interference reveal criterion calculate other users balanced device, and further can also include by the balanced device of acquisition be sent to correspondence user user equipment the step of.The use of above-mentioned balanced device is it is contemplated that the processing of data receiver, data sending terminal can update to balanced device and the mutual iteration of precoder in cyclic process (especially in interference alignment procedure)；For the equilibrium vector of determination, data receiver can be informed after quantization, and data receiver can carry out interference elimination treatment according to the balanced device to the data flow received.The spatial coherence of channel matrix is considered in the above-described embodiments, the method for coordinating interference alignment using interference avoidance obtains pre-coding matrix, on the basis of the above, further the element value of each element in pre-coding matrix can also be modified according to zero forcing algorithm and/or lms algorithm.

The following is with a specific embodiment, technical scheme is illustrated.In a wireless communication system, the environment residing for user is usually constructed with the scattering object compared with horn of plenty, and the terminal device of user receives periphery multiple obstacles refraction or the signal reflected back, causes to produce correlation in channel fading process.Under the effect of this correlation, and the transmitting antenna of not all contributes or produced interference to the terminal device, i.e. for specific user, under certain channel condition, by handling accordingly, it is possible to so that a certain transmitting antenna does not produce influence completely for the user, the transmitting antenna can transmit the signal of other users, without being disturbed by the specific user, will not also interference, the i.e. principle of interference avoidance be produced to the user.

Specifically, for a system being made up of G base station, there is N each base station_tIndividual transmitting antenna, and there are K (K >=N each base station_t) individual user, each user has N_rBase station and user distribution, are expressed as B by individual antenna_nAnd M_mk, wherein n ∈ { 1,2 ..., G }, m ∈ { 1,2 ..., G }, k ∈ { 1,2 ..., K } are H from nth base station to the channel of k-th of user of m cells_{n_mk}, each base station chooses a part of offer service from its K user, i.e., traditional SDMA, the free degree that the user each chosen can obtain is d_f(d_f≤N_r, i.e., at most processing d_fIndividual independent data flow), B_nThe service user collection chosen isa_i∈ { 1,2 ..., K }, its total number is J_n, it is expressed as J_n=| A_n|, here " | A_n| " operate to ask for " A_n" operation of element total number in set.

Under the framework of the interference channel of three base stations, the available dimension of each user is 4 spaces (may be considered receiver has 4 stand-alone antennas, can handle 4 road signals), and Fig. 2A, Fig. 2 B and Fig. 2 C are for user M₁₁For, come from base station B₂With base station B₃Interference processing mode, wherein Fig. 2A for interference alignment schematic diagram, Fig. 2 B be interference avoidance schematic diagram, Fig. 2 C be interference avoidance coordinate interference alignment schematic diagram.As shown in Figure 2 A, base station B is come from₂With base station B₃To user M₁₁Channel matrix H_{2_11}And H_{3_11}It is orthogonal, base station B₂With base station B₃Signal the dimension in two spaces can be aligned in user B1 receiving terminal with the mode of interference alignment so that user M₁₁The signal of 2 dimensions can smoothly be transmitted；Separately as shown in Figure 2 B, it uses the thinking of interference avoidance, and equivalent channel not full rank (if if equivalent channel full rank, then due to base station B₂With base station B₃The space of 4 dimensions is all taken, base station B₁Will be unable to transmit signal), correlation, base station B is presented in space₂To user B₁Equivalent channel matrix H_{2_11}The upper right corner occurs in that zero-bit, and its order becomes 3, namely base station B₁To user M₁₁It can be transmitted with interference-free using the position (i.e. corresponding Spatial Dimension), similarly, B₃To user M₁₁Equivalent channel matrix H_{3_11}The lower right corner occurs in that zero-bit, namely base station B₁To user M₁₁It can be transmitted with interference-free using the position (i.e. corresponding Spatial Dimension), so total effect is exactly to user M₁₁There can be the space propagation signal of 2 dimensions, for the angle of mathematical expression, to H_{2_11}And H_{3_11}, always there is 1 × 4 vectorial u of non-zero₂And u₃So that H_{2_11}*u₂=H_{3_11}*u₃=0, take u₂And u₃Respectively base station B₂With base station B₃Pre-coding matrix U₂And U₃First row, that is, have rank ([H_{2_11}*U₂ H_{3_11}*U₃])≤2, i.e., in fig. 2b, 2 spaces of the row of the left side one are at most only accounted for, also just 2, right side space are left for user M₁₁Transmit data.Fig. 2 C combine above-mentioned two situations, first according to the principle and H of interference avoidance_{2_11}And H_{3_11}Space correlation degree vacated the dimensions of 2 grid in the right, i.e., choose u using interference avoidance principle₂₂And u₃₂Respectively U₂And U₃Secondary series, then further according to interference alignment thinking by the upper left corner come from base station B₂Interference and base station B₃Interference alignment, i.e. H_{2_11}*u₂₁=H_{3_11}*u₃₁(correspondence B₂And B₃The corresponding dimension of grid in the upper left corner), so total interference dimension just only has rank ([H_{2_11}*U₂ H_{3_11}*U₃])=1, therefore the signal of 3 space dimensions can be transmitted, effectively increase the handling capacity of system.

Above-mentioned Fig. 2 B use the thinking of interference avoidance, wherein equivalent channel not full rank, if if equivalent channel full rank, then due to base station B₂With base station B₃The space of 4 dimensions is all taken, base station B₁It will be unable to transmit signal.The thinking of the embodiment of the present invention given by Fig. 2 C, it carries out interference avoidance according to the spatial coherence of channel matrix first, then further according to the principle of interference alignment, interference signal is snapped into the treatable interference space of user, when interference avoidance can not be carried out, interference alignment can be directly carried out, that is, corresponds to the step of step 102 and step 103 in above-mentioned embodiment illustrated in fig. 3 obtain each element in pre-coding matrix.

It is also assumed that the antenna spacing of base station and user are half wavelength lambda/2, then definable angle spread vector is：

$e_N\left(\mathrm{\ω}\right)=\frac{1}{\sqrt{N}}{[1,e^{-j2\mathrm{\π}\left(\mathrm{\ω}\right)},e^{-j2\mathrm{\π}\left(2\mathrm{\ω}\right)}...e^{-j2\mathrm{\π}\left((N-1)\mathrm{\ω}\right)}]}^T$

Originator beam vectors are accordingly

$A_T=[e_{N_t}\left(0\right),e_{N_t}\left(\frac{1}{N_t}\right)...,e_{N_t}\left(\frac{N_t-1}{N_t}\right)]$

It is with receiving end vector

$A_R=[e_{N_r}\left(0\right),e_{N_r}\left(\frac{1}{N_r}\right)...,e_{N_r}\left(\frac{N_r-1}{N_r}\right)]$

Then channel matrix H_{n_mk}With virtual angle spread channel matrix

There is following one-to-one relationship：

$H_{n\_\mathrm{mk}}=A_R{H}_{n\_\mathrm{mk}}^v{A}_T^H$

Defined herein each virtual angle spread channel matrix H_{n_mk}In non-zero column vector where location sets be effectively virtual angle set

(n ≠ m ∈ { 1,2 ..., G }, i ∈ A_m(here, G represents G base station, and A represents that user collects, here, A_mWith A said before_nUser's collection of different base station is represented, in other words user's collection of adjacent base station),

Here subscript v represents it is to be directed to H_{n_mk}The processing done, similarly hereinafter), the corresponding effective virtual emission angle position collection in each base station is combined into

(it meets

It is { 1,2 ..., N_tSubset,

), the corresponding effective signal radiated position in each base station (i.e. the corresponding precoding vector of the stream is not 0) collection is combined into

(

For the q row precoding vector of nth base station), the user that can be avoided integrates as M_ave, it is necessary to which the user for making interference alignment integrates as M_align。

The algorithm flow of the present embodiment, change in view of effective virtual angle class parameter is slower, the step of obtaining interference avoidance parameter according to above-mentioned parameter can be carried out offline, and the precoding calculated based on instantaneous channel state and equalizer computation by on-line operation by that can only be carried out, therefore the flow can be divided into offline part and online part two large divisions, Fig. 3 gives the calculation process of offline part and online part, that is, in implementing shown in Fig. 1 the step of the acquisition interference avoidance parameter of step 101, as shown in figure 3, comprising the following steps that：

Step 401, initialization step, i.e. initialising subscriber collection A_n, effective virtual emission angle position set

Effectively launch location setsAnd M_ave, wherein

Their all empty sets are made, are defined

That is the treatable interference space dimension of k-th user of nth base station institute；

Step 402, a user added according to dispatching principle, that is, increase a service user, and its corresponding d_fIndividual effective virtual emission angle, to form new user's set A_n=A_n∪ { k } and new

Wherein { n, k, E_subObtained by following formula：

$[n,k,E_{\mathrm{sub}}]=\arg \underset{n\∈\{\mathrm{1,2}...G\},k\∈\{\mathrm{1,2}...K\}\backslash A_n,E_{\mathrm{sub}}\⊆(E_{n\_\mathrm{nk}}^v\backslash T_n^l),\left|E_{\mathrm{sub}}\right|=d_f}{\min }\left(\underset{m=1,m\≠n}{\overset{G}{\mathrm{\Σ}}}\underset{i\∈A_m}{\mathrm{\Σ}}\right|E_{n\_\mathrm{mi}}\∩(T_n^I\∪E_{\mathrm{sub}})\left|\right)$

And update

In the present embodiment, " A B " represent remove B element or set B from set A, similarly hereinafter.

Step 403, to each user Mma selected_k, user's collection M can be avoided according to whether avoidance condition confirms whether it should belong into Rob Roy_ave, avoidance condition is represented by：

$\underset{m=1,m\≠n}{\overset{G}{\mathrm{\Σ}}}|E_{n\_\mathrm{mak}}^v\∩T_n^Z|\≤N_r-d_f$

Step 404, determine whether all selected users all can use interference avoidance, that is, judge

Whether set up, obtained by being preserved if setting up

And return to step 402, otherwise to step 405；

Step 405, renewal

Comprise determining whether all with can be handled per family by interference alignment thereof, and judge whether the step of all virtual emission dimensions have been completely used for alignment, specifically can be as shown in figure 4, wherein B be collection of base stations, step is as follows：

Step 4051, initialization, make M_alignFor empty set, i.e. M_align=φ, and update $F_n^U=T_n^Z\backslash T_n^I,n\∈\{\mathrm{1,2},...G\};$

Step 4052, initialize and make collection of base stations be empty set, i.e. B=φ, then select any one user

Wherein

The result once calculated before representing；

Step 4053, check pre-coding matrix and balancing matrix the remaining free degree whether no less than interference to the free degree required for it, i.e.,

Whether set up, n is defined as herein

If invalid execution step 4054, otherwise performs step 4056；

Step 4054, all virtual angles that judge whether have been used for interference alignment, i.e.,

Whether set up, if then exiting algorithm, and export and the result same with last computation

I.e. all base stations

Update and finished, then stopped iteration, exported

Otherwise step 4055 is performed；

Step 4055, renewal effective signal radiated location sets

Wherein n, q by

It is determined that, while return to step 403；

Step 4056, renewal B,

Wherein B=B ∪ { n }, if in addition,ThenIn remove arbitrarily exist

In d_fIndividual element, otherwise, updates

And from

In remove any

Individual element；

Step 4057, judge whether the interference from all emitters aligns at receiver, i.e. B={ 1,2 ... G } { m } whether set up, step 4058 is performed if setting up, step 4056 is otherwise performed；

Step 4058, judge whether all selected receivers be selected into avoidance collection, or be identified can be achieved interference alignment, i.e.,

Whether set up, perform step 4059 if setting up, otherwise return to step 4052；

Step 4059, storage

And return to step 402.

The calculating of another just online part, i.e., corresponding to the step of the numerical value of each element, may include steps of in acquisition pre-coding matrix in step 102 in embodiment illustrated in fig. 1 and step 103：

Step 501, exported according to above-mentioned offline part

Calculate the element value (confirming the determination part in pre-coding matrix) for obtaining fixed element in pre-coding matrix：

Wherein

For the element in pre-coding matrix；

Step 502, using online interference avoidance algorithm obtain it is all in M_aveIn the corresponding balanced device of avoidance user：

Even

Wherein

For

Q row,

Then QR decomposition is carried out：Wherein Q_makIt is orthogonal matrix, R_makIt is a upper triangular matrix.It can obtain：

WhereinIt is Q_makQ row；

Step 503, the principle calculating remaining part of precoder with interference alignment and the balanced device of other users；

Step 504, AF panel further carried out using SDMA ZF, MMSE scheduling algorithms in cell, i.e., the element value of each element in pre-coding matrix is modified according to zero forcing algorithm and/or lms algorithm.

The recoding processing method that the above embodiment of the present invention is provided, it carries out interference avoidance according to the spatial coherence of channel matrix first, then further according to the principle of interference alignment, interference signal is snapped into the treatable interference space of user, can effectively suppress the interference in multiple transmitting antenna communication system between signal.

The embodiment of the present invention additionally provides a kind of precoding processing device, the precoding processing device is able to carry out the recoding processing method in above-described embodiment, Fig. 5 is the structural representation of precoding processing device embodiment of the present invention, as shown in Figure 5, the device includes parameter acquisition module 11, the first computing module 12, the second computing module 13, structure module 14 and coded treatment module 15, parameter acquisition module 11 is wherein used for the spatial channel correlation parameter of communication system where obtaining base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter；First computing module 12 is used for the element value of the fixed element according to interference avoidance parameter acquiring pre-coding matrix to be built；Second computing module 13 is used for the element value that the other elements in addition to fixed element in pre-coding matrix to be built are obtained according to interference alignment algorithm；Building module 14 is used for the element value structure pre-coding matrix of the other elements in addition to fixed element in element value and the pre-coding matrix to be built according to the pre-coding matrix fixed element to be built of acquisition；Coded treatment module 15 is used to carry out precoding processing to data stream according to the pre-coding matrix.

The precoding processing device that the above embodiment of the present invention is provided, the spatial channel correlation parameter of communication system where by obtaining base station, and interference avoidance parameter is further obtained, to calculate the element value for the fixed element for obtaining pre-coding matrix, carry out interference avoidance；Then element value for obtaining other elements in pre-coding matrix is calculated it according to interference, precoding is carried out to data stream using the pre-coding matrix of above-mentioned acquisition, the inhibitory action to interference can be played.

Interference avoidance parameter in the above embodiment of the present invention can specifically include base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station and avoidance user's collection, refer to the parameter of effectively virtual angle class, its change in a communications system is relatively slow, therefore it can obtain and store by way of precalculating, as shown in Figure 6, the precoding processing device that above-described embodiment is provided can further include memory module 19, the memory module 19 is used to store the interference avoidance parameter obtained with offline mode according to spatial channel correlation parameter, therefore above-mentioned parameter acquisition module 11 can be the acquisition interference avoidance parameter from memory module 19.

On the basis of above-described embodiment, the first balanced device acquisition module 16 and the second balanced device acquisition module 17 can also further be included, the first above-mentioned balanced device acquisition module 16 is used to obtaining base station to be avoided user and concentrates each user corresponding in a communications system, for making data receiver to the balanced device of the data flow progress interference elimination received；Second balanced device acquisition module 17 is used to obtaining base station remove avoidance user and concentrates each corresponding with outdoor other users in a communications system, for making data receiver to the balanced device of the data flow progress interference elimination received.

In a particular embodiment, data correction module 18 can also be further set, and the data correction module 18 is used to be modified the element value of each element in pre-coding matrix according to zero forcing algorithm and/or lms algorithm.

The embodiment of the present invention additionally provides a kind of base station, and the base station includes the precoding processing device provided in above-described embodiment.The spatial channel correlation parameter of communication system where by obtaining base station is capable of in the base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter, the element value for the fixed element for obtaining pre-coding matrix is calculated, to realize interference avoidance；Then element value for obtaining other elements in pre-coding matrix is calculated it according to interference, precoding is carried out to data stream using the pre-coding matrix of above-mentioned acquisition, the inhibitory action to interference can be played.

One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, and foregoing program can be stored in a computer read/write memory medium, and the program upon execution, performs the step of including above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with the medium of store program codes.

Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (10)

1. a kind of recoding processing method, it is characterised in that including：

The spatial channel correlation parameter of communication system where obtaining base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter；

According to the element value of the fixed element of interference avoidance parameter acquiring pre-coding matrix to be built；

The element value of the other elements in addition to fixed element in pre-coding matrix to be built is obtained according to interference alignment algorithm；

According to the element value of other elements builds pre-coding matrix in addition to fixed element in the element value and the pre-coding matrix to be built of the pre-coding matrix fixed element to be built of acquisition；

Precoding processing is carried out to data stream according to the pre-coding matrix.

2. recoding processing method according to claim 1, it is characterised in that the interference avoidance parameter includes base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station and avoids user's collection；Or

The interference avoidance parameter includes base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station, avoidance user collection, the change collection of the change collection effective signal radiated position corresponding with base station of the corresponding effective virtual emission angle position in base station.

3. recoding processing method according to claim 2, it is characterised in that also include after the element value of the fixed element according to interference avoidance parameter acquiring pre-coding matrix：

Obtaining the avoidance user concentrates each user corresponding, for making data receiver to the data flow received disturb the balanced device of elimination；

And also include after the element value of other elements in addition to fixed element according in interference alignment algorithm acquisition pre-coding matrix：

Acquisition base station removes the avoidance user and concentrates each corresponding with outdoor other users in a communications system, for making data receiver disturb the data flow progress received the balanced device of elimination.

4. recoding processing method according to claim 1, it is characterised in that described to be specially according to spatial channel correlation parameter acquiring interference avoidance parameter：

Interference avoidance parameter is obtained using offline mode according to the spatial coherence parameter.

5. recoding processing method according to claim 1, it is characterised in that described to be carried out also including before precoding processing to data stream according to the pre-coding matrix：

The element value of each element in the pre-coding matrix is modified according to zero forcing algorithm and/or lms algorithm.

6. a kind of precoding processing device, it is characterised in that including：

Parameter acquisition module, the spatial channel correlation parameter of communication system where for obtaining base station, and according to the spatial channel correlation parameter acquiring interference avoidance parameter；

First computing module, the element value for the fixed element according to interference avoidance parameter acquiring pre-coding matrix to be built；

Second computing module, the element value for obtaining the other elements in addition to fixed element in pre-coding matrix to be built according to interference alignment algorithm；

Module is built, for the element value of other elements to build pre-coding matrix in addition to fixed element in the element value and the pre-coding matrix to be built of the pre-coding matrix fixed element to be built according to acquisition；

Coded treatment module, for carrying out precoding processing to data stream according to the pre-coding matrix.

7. precoding processing device according to claim 6, it is characterised in that also include：

Memory module, for storing the interference avoidance parameter obtained according to spatial channel correlation parameter with offline mode.

8. precoding processing device according to claim 6, it is characterised in that the interference avoidance parameter includes base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station and avoids user's collection；Or the interference avoidance parameter includes base station service user collection, the corresponding effective virtual emission angle position collection in base station, the corresponding effective signal radiated position collection in base station, avoidance user collection, the change collection of the change collection effective signal radiated position corresponding with base station of the corresponding effective virtual emission angle position in base station, described device also includes：

First balanced device acquisition module, avoids user for obtaining base station and concentrates each user corresponding, for making data receiver to the data flow received disturb the balanced device of elimination in a communications system；

Second balanced device acquisition module, removes avoidance user for obtaining base station and concentrates each corresponding with outdoor other users, for making data receiver to the data flow received disturb the balanced device of elimination in a communications system.

9. precoding processing device according to claim 6, it is characterised in that also include：

Data correction module, for being modified according to zero forcing algorithm and/or lms algorithm to the element value of each element in pre-coding matrix.

10. a kind of base station, it is characterised in that including any described precoding processing devices of claim 6-9.

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