CN104243374A

CN104243374A - Signal transmission method, device and system

Info

Publication number: CN104243374A
Application number: CN201310250665.3A
Authority: CN
Inventors: 王雪松
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2014-12-24
Anticipated expiration: 2033-06-21
Also published as: CN104243374B

Abstract

The embodiment of the invention provides a signal transmission method, device and system, and relates to the technical field of communications. The signal transmission method, device and system avoid interference between channels in signal transmission and meanwhile, reduce channel feedback pressure. The signal transmission method specifically comprises the steps that a first base station obtains channel parameters according to the channel estimation algorithm; a first pre-coding matrix of all data streams of first user equipment is generated according to the interference alignment algorithm; the first pre-coding matrix is sent to the first user equipment; a first coding signal sent by the first user equipment is received; a second coding signal sent by second user equipment is sent; the first received signal is detected to obtain a first superposed signal; a second superposed signal sent by a second base station is received; a processing signal is obtained according to the first superposed signal and the second superposed signal. The signal transmission method, device and system are applied to the signal transmission technology.

Description

A kind of method for transmitting signals, Apparatus and system

Technical field

The present invention relates to communication technical field, particularly relate to a kind of method for transmitting signals, Apparatus and system.

Background technology

At cell edge, there is the signal coming from this community and adjacent cells simultaneously.In up channel, base station can receive the signal of the user from neighbor cell, and in down channel, user can receive the signal of the base station coming from neighbor cell.The signal coming from neighbor cell just forms presence of intercell interference (Adjacent Cell Interference is called for short ACI) to this community, seriously affects performance.In order to suppress ACI, introducing the concept of coordinated multipoint transmission (Coordinated Multiple Points Transmission is called for short CoMP) in LTE, reducing the impact of ACI on performance by the collaborative of minizone.

Long Term Evolution (Long Time Evolution, be called for short LTE) in CoMP technology can be roughly divided into two classes, joint transmission/reception (Joint Transmission/Reception, be called for short JT/JR) technology and cooperative beam shaping (Cooperative Beam Forming, be called for short CBF) technology.In prior art, the general JT/JR of employing technology suppresses ACI, JT/JR technology is by sharing the data that will send/receive between the base station of neighbor cell, and the signal that the data that will be sent each community send or correspondingly receive each community after combined coding on each base station merges, joint-detection to be to suppress ACI.But in JT/JR technology, each subscriber equipment (User Equipment, be called for short UE) pre-coding matrix design only with all channel condition information (Channel State Information making a start oneself, be called for short CSI) (JT) and oneself to arrive the CSI (JR) of all receiving ends relevant, and have nothing to do with the CSI (JR) of the CSI (JR) of all other receiving ends of making a start and other all receiving ends of making a start, which dictates that the selection of final pre-coding matrix must rest on a very low equilibrium point.Such interference power can be very large, thus cause the massive losses of receiving terminal Signal to Interference plus Noise Ratio.Meanwhile, JT/JR technology needs to know overall CSI making a start, and this causes very large pressure to channel feedback.

Summary of the invention

Embodiments of the invention provide a kind of method for transmitting signals, Apparatus and system, reduce the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.

For achieving the above object, embodiments of the invention adopt following technical scheme:

First aspect, provides a kind of method for transmitting signals, comprising:

First base station, according to channel estimation method, obtains channel parameter;

According to interference alignment algorithm, generate the first pre-coding matrix of each data flow of first user equipment; Wherein, described first pre-coding matrix is used for encoding to the first transmission signal;

Send described first pre-coding matrix to described first user equipment;

Receive the first code signal that described first user equipment sends; Wherein, described first code signal adopts described first pre-coding matrix to obtain described first transmission Signal coding;

Receive the second code signal that the second subscriber equipment sends; Wherein, described second code signal is that employing second pre-coding matrix obtains the second transmission Signal coding; Described second pre-coding matrix is that the second base station generates according to interference alignment algorithm;

First Received signal strength is detected, obtains the first superposed signal; Wherein, described first superposed signal is the described interference signal of the first base station and the superposition of useful signal; Described first Received signal strength comprises: described first code signal and described second code signal;

Receive the second superposed signal that described second base station sends; Wherein, described second superposed signal is that the second base station is detected the second Received signal strength and obtained; Described second Received signal strength comprises: described first code signal and described second code signal;

According to described first superposed signal and described second superposed signal, obtain processing signals.

In the implementation that the first is possible, in conjunction with first aspect, described according to described first superposed signal and described second superposed signal, after obtaining processing signals, also comprise:

Sequence Detection is adopted to described processing signals, obtains described first and send signal.

In the implementation that the second is possible, in conjunction with first aspect or the first possible implementation, described first base station, according to channel estimation method, obtains channel parameter, comprising:

According to channel estimation method, obtain the channel fading parameters of described first base station to the subscriber equipment corresponding with described first base station;

According to described channel fading parameters, obtain described channel parameter.

In the implementation that the third is possible, in conjunction with first aspect or the first possible implementation, described according to interference alignment algorithm, generate the first pre-coding matrix of each data flow of first user equipment, comprising:

The all non-vanishing M dimensional vector of any selection each component is as first precoding vector of described first pre-coding matrix; Wherein, described M is positive integer;

According to the i-th-1 precoding vector of described second pre-coding matrix, obtain i-th precoding vector of described first pre-coding matrix; Wherein, the i-th-1 precoding vector of described second pre-coding matrix is that the second base station obtains according to the i-th-1 precoding vector of described first pre-coding matrix; Described i be greater than 1 positive integer.

Second aspect, provides a kind of method for transmitting signals, comprising:

First user equipment receives the first pre-coding matrix that the first base station sends; Wherein, described first pre-coding matrix is that described first base station generates, and encodes for sending signal to first;

Send signal according to described first pre-coding matrix to described first to encode, obtain the first code signal;

Send described first code signal, so that described first base station obtains according to the first Received signal strength do not have noisy signal; Wherein, described first Received signal strength comprises: described first code signal and the second code signal; To be the second subscriber equipment send signal according to the second pre-pre-coding matrix to second to described second code signal encodes and obtain; Described second pre-coding matrix is that the second base station generates.

The third aspect, provides a kind of method for transmitting signals, comprising:

First base station receives the channel parameter that first user equipment sends;

According to interference alignment algorithm, generate the first pre-coding matrix of each data flow of described first user equipment;

Send described first pre-coding matrix to described first user equipment;

Receive the second transmission signal that the second base station sends;

Send signal and described second according to first and send signal, obtain the first signal to be sent; Wherein, described first the signal that signal is the first base station is sent;

Adopt described first pre-coding matrix to encode to described first signal to be sent, obtain the first code signal;

Send described first code signal, so that described first user equipment obtains described first according to the first Received signal strength send signal; Wherein, described first Received signal strength comprises: described first code signal and the second code signal; Described second code signal is that described second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Described second signal to be sent is that the second base station obtains.

In the implementation that the first is possible, in conjunction with the third aspect, described according to interference alignment algorithm, generate the first pre-coding matrix of each data flow of described first user equipment, comprising:

Fourth aspect, provides a kind of method for transmitting signals, comprising:

First user equipment, according to channel estimation method, obtains channel parameter;

Send described channel parameter to the first base station;

Receive the first pre-coding matrix that described first base station sends;

Receive the first code signal that described first base station sends; Wherein, described first code signal is that described first base station adopts described first pre-coding matrix to encode to the first signal to be sent and obtain; Described first signal to be sent is that described first base station sends signal and the second transmission signal acquisition according to first;

Receive the second code signal that described second base station sends; Wherein said second code signal is that described second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Described second signal to be sent is that described second base station sends signal and the second transmission signal acquisition according to first; Described second pre-coding matrix is that described second base station generates;

According to the first Received signal strength, obtain processing signals; Wherein, described first Received signal strength comprises: described first code signal and described second code signal.

In the implementation that the first is possible, in conjunction with fourth aspect, described according to the first Received signal strength, after obtaining processing signals, also comprise:

Described processing signals is detected, obtains described first according to described first pre-coding matrix and described second pre-coding matrix and send signal.

In the implementation that the second is possible, in conjunction with fourth aspect or the first possible implementation, described first user equipment, according to channel estimation method, obtains channel parameter, comprising:

5th aspect, provides a kind of first base station, comprising:

Acquiring unit, for according to channel estimation method, obtains channel parameter;

Generation unit, for according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment; Wherein, described first pre-coding matrix is used for encoding to the first transmission signal;

Transmitting element, for sending described first pre-coding matrix to described first user equipment;

Receiving element, for receiving the first code signal that described first user equipment sends; Wherein, described first code signal adopts described first pre-coding matrix to obtain described first transmission Signal coding;

Described receiving element, also for receiving the second code signal that the second subscriber equipment sends; Wherein, described second code signal is that the second subscriber equipment adopts the second pre-coding matrix to obtain the second transmission Signal coding; Described second pre-coding matrix is that the second base station generates according to interference alignment algorithm;

Detecting unit, for detecting the first Received signal strength, obtains the first superposed signal; Wherein, described first superposed signal is the described interference signal of the first base station and the superposition of useful signal; Described first Received signal strength comprises: described first code signal and described second code signal;

Described receiving element, also for receiving the second superposed signal that described second base station sends; Wherein, described second superposed signal is that the second base station is detected the second Received signal strength and obtained; Described second Received signal strength comprises: described first code signal and described second code signal;

Described acquiring unit, also for according to described first superposed signal and described second superposed signal, obtains processing signals.

In the implementation that the first is possible, in conjunction with the 5th aspect, also comprise:

Processing unit, for adopting Sequence Detection to described processing signals, obtaining described first and sending signal.

In the implementation that the second is possible, in conjunction with the 5th aspect or the first possible implementation, described acquiring unit specifically for:

In the implementation that the third is possible, in conjunction with the 5th aspect or the first possible implementation, described generation unit comprises:

Choose subelement, for the M dimensional vector of selecting arbitrarily each component all non-vanishing first precoding vector as described first pre-coding matrix; Wherein, described M is positive integer;

Obtain subelement, for the i-th-1 precoding vector according to described second pre-coding matrix, obtain i-th precoding vector of described first pre-coding matrix; Wherein, the i-th-1 precoding vector of described second pre-coding matrix is that the second base station obtains according to the i-th-1 precoding vector of described first pre-coding matrix; Described i be greater than 1 positive integer.

6th aspect, provides a kind of first user equipment, comprising:

Receiving element, for receiving the first pre-coding matrix that the first base station sends; Wherein, described first pre-coding matrix is that described first base station generates, and encodes for sending signal to first;

Processing unit, encoding for sending signal according to described first pre-coding matrix to described first, obtaining the first code signal;

Transmitting element, for sending described first code signal, so that described first base station obtains according to the first Received signal strength do not have noisy signal; Wherein, described first Received signal strength comprises: described first code signal and the second code signal; To be the second subscriber equipment send signal according to the second pre-pre-coding matrix to second to described second code signal encodes and obtain; Described second pre-coding matrix is that the second base station generates.

7th aspect, provides a kind of first base station, comprising:

Receiving element, for receiving the channel parameter that first user equipment sends;

Generation unit, for according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of described first user equipment;

Described receiving element, also send for receiving the second base station second sends signal;

Acquiring unit, sending signal for sending signal and described second according to first, obtaining the first signal to be sent; Wherein, described first the signal that signal is the first base station is sent;

Processing unit, for adopting described first pre-coding matrix to encode to described first signal to be sent, obtains the first code signal;

Described transmitting element, also for sending described first code signal, so that described first user equipment obtains described first according to the first Received signal strength send signal; Wherein, described first Received signal strength comprises: described first code signal and the second code signal; Described second code signal is that described second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Described second signal to be sent is that the second base station obtains.

In the implementation that the first is possible, in conjunction with the 7th aspect, described generation unit comprises:

Eighth aspect, provides a kind of first user equipment, comprising:

Transmitting element, for sending described channel parameter to the first base station;

Receiving element, for receiving the first pre-coding matrix that described first base station sends;

Described receiving element, also for receiving the first code signal that described first base station sends; Wherein, described first code signal is that described first base station adopts described first pre-coding matrix to encode to the first signal to be sent and obtain; Described first signal to be sent is that described first base station sends signal and the second transmission signal acquisition according to first;

Described receiving element, also for receiving the second code signal that described second base station sends; Wherein, described second code signal is that described second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Described second signal to be sent is that described second base station sends signal and the second transmission signal acquisition according to first; Described second pre-coding matrix is that described second base station generates;

Described acquiring unit, also for according to the first Received signal strength, obtains processing signals; Wherein, described first Received signal strength comprises: described first code signal and described second code signal.

In the implementation that the first is possible, in conjunction with eighth aspect, described first user equipment also comprises:

Processing unit, for detecting described processing signals, obtaining described first according to described first pre-coding matrix and described second pre-coding matrix and sending signal.

In the implementation that the second is possible, in conjunction with eighth aspect or the first possible implementation, described acquiring unit specifically for:

9th aspect, provides a kind of signal transmission system, comprising: the first base station, the second base station, first user equipment and the second subscriber equipment, wherein:

Described first base station is the first base station described in the 5th aspect; Described first user equipment is the first user equipment described in the 6th aspect;

Described second base station, for sending the second superposed signal to the first base station; Generate the second pre-coding matrix; Wherein, described second superposed signal is that the second base station is detected the second Received signal strength and obtained; Described second Received signal strength comprises: the first code signal and the second code signal;

Described second subscriber equipment, for sending the second pre-coding matrix; Send signal according to the described second pre-pre-coding matrix to second to encode, obtain described second code signal.

Tenth aspect, provides a kind of signal transmission system, comprising: the first base station, the second base station, first user equipment and the second subscriber equipment, wherein:

Described first base station is the first base station described in the 7th aspect; Described first user equipment is the first user equipment described in eighth aspect;

Described second base station, sends a signal to the first base station for sending second; Send the second code signal to described first user equipment; Generate the second pre-coding matrix;

Described second subscriber equipment, for carrying out transfer of data with the second base station.

The method for transmitting signals that embodiments of the invention provide, Apparatus and system, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

The schematic flow sheet of a kind of method for transmitting signals that Fig. 1 provides for embodiments of the invention;

The schematic flow sheet of the another kind of method for transmitting signals that Fig. 2 provides for embodiments of the invention;

The schematic flow sheet of another method for transmitting signals that Fig. 3 provides for embodiments of the invention;

The schematic flow sheet of a kind of method for transmitting signals that Fig. 4 provides for another embodiment of the present invention;

The schematic flow sheet of the another kind of method for transmitting signals that Fig. 5 provides for another embodiment of the present invention;

The schematic flow sheet of another method for transmitting signals that Fig. 6 provides for another embodiment of the present invention;

The structural representation of a kind of first base station that Fig. 7 provides for embodiments of the invention;

The structural representation of another kind first base station that Fig. 8 provides for embodiments of the invention;

The structural representation of another the first base station that Fig. 9 provides for embodiments of the invention;

The structural representation of the another kind of first user equipment that Figure 10 provides for embodiments of the invention;

The structural representation of a kind of first base station that Figure 11 provides for another embodiment of the present invention;

The structural representation of another kind first base station that Figure 12 provides for another embodiment of the present invention;

The structural representation of another the first user equipment that Figure 13 provides for embodiments of the invention;

The structural representation of a kind of first user equipment that Figure 14 provides for another embodiment of the present invention;

The structural representation of another the first base station that Figure 15 provides for another embodiment of the present invention;

The structural representation of the another kind of first user equipment that Figure 16 provides for another embodiment of the present invention;

The structural representation of a kind of first base station that Figure 17 provides for another embodiment of the present invention;

The structural representation of another the first user equipment that Figure 18 provides for another embodiment of the present invention;

The structural representation of a kind of signal transmission system that Figure 19 provides for embodiments of the invention;

The structural representation of the another kind of signal transmission system that Figure 20 provides for embodiments of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiments of the invention provide a kind of method for transmitting signals, with reference to shown in Fig. 1, comprise the following steps:

101, the first base station is according to channel estimation method, obtains channel parameter.

102, the first base station is according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment.

Wherein, the first pre-coding matrix is used for encoding to the first transmission signal.

103, the first base station sends the first pre-coding matrix to first user equipment.

104, the first base station receives the first code signal that first user equipment sends.

Wherein, the first code signal is that employing first pre-coding matrix obtains the first transmission Signal coding.

105, the first base station receives the second code signal that the second subscriber equipment sends.

Wherein, the second code signal is that employing second pre-coding matrix obtains the second transmission Signal coding.

106, the first base station is detected the first Received signal strength, obtains the first superposed signal.

Wherein, the first superposed signal is the interference signal of the first base station and the superposition of useful signal; First Received signal strength comprises: the first code signal and the second code signal.

107, the first base station receives the second superposed signal that the second base station sends.

Wherein, the second superposed signal is that the second base station is detected the second Received signal strength and obtained; Second Received signal strength comprises: the first code signal and the second code signal.

108, the first base station is according to the first superposed signal and the second superposed signal, obtains processing signals.

The method for transmitting signals that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.

Embodiments of the invention provide a kind of method for transmitting signals, with reference to shown in Fig. 2, comprise the following steps:

201, first user equipment receives the first pre-coding matrix that the first base station sends.

Wherein, the first pre-coding matrix is that the first base station generates, and encodes for sending signal to first.

202, first user equipment is encoded to the first transmission signal according to the first pre-coding matrix, obtains the first code signal.

203, first user equipment sends the first code signal to the first base station, so that the first base station obtains according to the first Received signal strength do not have noisy signal.

Wherein, the first Received signal strength comprises: the first code signal and the second code signal; To be the second subscriber equipment send signal according to the second pre-pre-coding matrix to second to second code signal encodes and obtain; Second pre-coding matrix is that the second base station generates.

Embodiments of the invention provide a kind of method for transmitting signals, with reference to shown in Fig. 3, comprise the following steps:

301, the first base station receives the channel parameter that first user equipment sends.

302, the first base station is according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment.

303, the first base station sends the first pre-coding matrix to first user equipment.

304, the first base station receives the second transmission signal that the second base station sends.

305, the first base station sends signal and second according to first and sends signal, obtains the first signal to be sent.

Wherein, first the signal that signal is the first base station is sent.

306, the first base station adopts the first pre-coding matrix to encode to the first signal to be sent, obtains the first code signal.

307, the first base station sends the first code signal to first user equipment, so that first user equipment obtains first according to the first Received signal strength send signal.

Wherein, the first Received signal strength comprises: the first code signal and the second code signal; Second code signal is that the second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Second signal to be sent is that the second base station obtains.

Embodiments of the invention provide a kind of method for transmitting signals, with reference to shown in Fig. 4, comprise the following steps:

401, first user equipment is according to channel estimation method, obtains channel parameter.

402, first user equipment transmitting channel parameter to the first base station.

403, first user equipment receives the first pre-coding matrix that the first base station sends.

404, first user equipment receives the first code signal that the first base station sends.

Wherein, the first code signal is that the first base station adopts the first pre-coding matrix to encode to the first signal to be sent to obtain; First signal to be sent is that the first base station sends signal and the second transmission signal acquisition according to first.

405, first user equipment receives the second code signal that the second base station sends.

Wherein, the second code signal is that the second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Second signal to be sent is that the second base station sends signal and the second transmission signal acquisition according to first; Second pre-coding matrix is that the second base station generates.

406, first user equipment is according to the first Received signal strength, obtains processing signals; Wherein, the first Received signal strength comprises: the first code signal and the second code signal.

Embodiments of the invention provide a kind of method for transmitting signals, are applied in signal uplink transmitting procedure, the individual independently data flow of one of them user device transmissions M, and another user device transmissions M-1 data flow, with reference to shown in Fig. 5, comprises the following steps:

501, the first base station is according to channel estimation method, obtains the channel fading parameters of the first base station to the subscriber equipment corresponding with this first base station.

502, the first base station is according to channel fading parameters, obtains channel parameter.

Concrete, the number difference between the two of the data flow that the first user equipment in embodiments of the invention and the second subscriber equipment transmit respectively is necessary for 1.All configure M root antenna with the first base station and first user equipment in the present embodiment, the second base station second subscriber equipment all configures M-1 root antenna.Every root antenna transmits a data flow, and with a first user device transmission M data flow, the second user device transmissions M-1 data flow is that example is described.

In the present embodiment with the channel fading parameters from the kth root antenna of the first base station to n-th antenna of first user equipment channel parameter H is obtained according to channel estimation method for example illustrates _mmand H _mpconcrete steps be: the first base station sends a transmitting terminal and the known all in advance pilot signal of receiving terminal on kth root antenna the Signal reception that n-th antenna of therefore first user equipment receives to decline after pilot signal be wherein, n _mnfor the noise vector on n-th antenna of first user equipment, also be channel fading parameters H _mmrow k n-th arrange element.Right divided by p _mkobtain, namely equal to be subject to noise disturbance ? as right estimator.Similarly, each antenna that can be obtained the first base station by above-mentioned computational methods is declined to the channel parameter of each antenna of first user equipment, finally obtains channel fading parameters H _mm.Similarly, can be obtained channel fading parameters H by said process _mp.Further, channel parameter is obtained according to channel fading parameters

By above-mentioned identical process, the second base station can obtain the channel fading parameters H of the second base station to the subscriber equipment corresponding with this second base station _pmand H _pp, and then, can according to H _pmand H _ppobtain corresponding channel parameter

503, the first base station M dimensional vector of selecting arbitrarily each component all non-vanishing is as first precoding vector of the first pre-coding matrix.

Wherein, M is positive integer.

504, the first base station is according to the i-th-1 precoding vector of the second pre-coding matrix, obtains i-th precoding vector of the first pre-coding matrix.

Wherein, the i-th-1 precoding vector of the second pre-coding matrix is that the second base station obtains according to the i-th-1 precoding vector of the first pre-coding matrix; I be greater than 1 positive integer.

Concrete, as the first pre-coding matrix V _mthe first precoding vector v _m1select, the process obtaining the first pre-coding matrix is:

According to the first precoding vector of the first pre-coding matrix, obtain the second pre-coding matrix V _pthe first precoding vector v _p1: make v _m1and v _p1in the first base station alignment, obtain H _mmv _m1=H _mpv _p1.Order according to obtain v _p1=T _mv _m1.

According to the first precoding vector of the second pre-coding matrix, obtain the second precoding vector v of the first pre-coding matrix _m2: make v _p1and v _m2in the second base station alignment, obtain H _pmv _m2=H _ppv _p1, order according to obtain v _m2=T _pv _p1.

According to above-mentioned method, make v _miand v _piin the first base station alignment, obtain v _pi=T _mv _mi.

Make v _piand v _{m (i+1)}in the second base station alignment, obtain v _{m (i+1)}=T _pv _pi.Finally v can be obtained _mi=(T _mt _p) ^i-1v _m1, i=1,2 ... M; v _pi=T _m(T _mt _p) ^i-1v _m1, i=1,2 ... M-1.

505, the first base station sends the first pre-coding matrix to first user equipment.

506, first user equipment receives the first pre-coding matrix that the first base station sends.

507, first user equipment is encoded to the first transmission signal according to the first pre-coding matrix, obtains the first code signal.

Concrete, the first code signal after the first pre-coding matrix coding is V _mm _m; Wherein, m _mfor first of first user equipment sends signal.

508, first user equipment sends the first code signal to the first base station, so that the first base station obtains according to the first Received signal strength do not have noisy signal.

Concrete, the second code signal after the second pre-coding matrix coding is V _pm _p; Wherein, m _pbe that second of the second subscriber equipment sends signal.

First user equipment sends the first code signal with the form of broadcast.Just illustrate in this enforcement that the first base station can receive the first code signal of first user equipment transmission.Certainly, be that any one receiving equipment in this transmission system all can receive the first code signal, such as the second base station.

509, the first base station receives the first code signal that first user equipment sends.

510, the first base station receives the second code signal that the second subscriber equipment sends.

Wherein, the second code signal is that employing second pre-coding matrix obtains the second transmission Signal coding; Second pre-coding matrix is that the second base station generates according to interference alignment algorithm.

511, the first base station is detected the first Received signal strength, obtains the first superposed signal.

Wherein, the first superposed signal is the interference signal of the first base station and the superposition of useful signal.

Concrete, the first Received signal strength y that the first base station receives _mfor y _m=H _mmv _mm _m+ H _mpv _pm _p+ n _m.Wherein, m _pbe that second of the second subscriber equipment sends signal; n _mfor the noise vector at first user equipment place.According to the first pre-coding matrix obtained in step 504 and the second pre-coding matrix, obtain the first Received signal strength:

y_{m} = [H_{mm} v_{m 1}, H_{mm} v_{m 2}, . . ., H_{mm} v_{mM}] [\begin{matrix} m_{m 1} + m_{p 1} \\ m_{m 2} + m_{p 2} \\ . . \\ m_{mM} \end{matrix}] + n_{m}

Similar, can obtain according to identical calculation procedure the second Received signal strength y that the second base station receives _pfor y _p=H _pmv _mm _m+ H _ppv _pm _p+ n _p; Wherein, n _pit is the noise vector at the second subscriber equipment place.According to the first pre-coding matrix obtained in step 504 and the second pre-coding matrix, obtain the second Received signal strength:

y_{p} = [H_{pm} v_{m 1}, H_{pp} v_{p 1}, . . ., H_{pp} v_{p (M - 1)}] [\begin{matrix} m_{m 1} \\ m_{m 2} + m_{p 1} \\ . . \\ m_{mM} + m_{p (m - 1)} \end{matrix}] + n_{m}

In reality, in the first Received signal strength that the first base station receives, also comprise the noise signal of the first base station; The noise signal of the second base station is also comprised in the second Received signal strength that second base station receives.Therefore, noise signal n can be included in the expression of signal that the first base station and the second base station receive _mand n _p.

First superposed signal is the y of the first base station by receiving in the first base station _madopt squeeze theorem or minimum mean-squared error algorithm method to obtain in signal, be certainly not limited to adopt this two kinds of methods, user can select suitable detection method according to concrete implementation environment, and this first superposed signal can be expressed as:

m _m1+m _p1，m _m2+m _p2，…，m _m(M-1)+m _p(M-1)，m _pM

Concrete, this sentences and adopt squeeze theorem method to detect to obtain the first superposed signal being that example illustrates concrete implementation process:

To the first Received signal strength y _mthe left side is multiplied by ((H _mmv _m) ^hh _mmv _m) ^-1(H _mmv _m) ^hobtain,

{({(H_{mm} V_{m})}^{H} H_{mm} V_{m})}^{- 1} {(H_{mm} V_{m})}^{H} y_{m} = [\begin{matrix} m_{m 1} + m_{p 1} \\ m_{m 2} + m_{p 2} \\ . . \\ m_{mM} \end{matrix}] + {({(H_{mm} V_{m})}^{H} H_{mm} V_{m})}^{- 1} {(H_{mm} V_{m})}^{H} n_{m}

= [\begin{matrix} m_{m 1} + m_{p 1} \\ m_{m 2} + m_{p 2} \\ . . \\ m_{mM} \end{matrix}] + n_{m}^{'}

Wherein, for coloured noise.By by ((H _mmv _m) ^hh _mmv _m) ^-1(H _mmv _m) ^hy _min each element value be mapping value immediate with it, thus obtain the first superposed signal.

512, the first base station receives the second superposed signal that the second base station sends.

Wherein, second base station adopts squeeze theorem or minimum mean-squared error algorithm method to detect the second superposed signal obtained, certainly be not limited to adopt this two kinds of methods, user can select suitable detection method according to concrete implementation environment, and the second superposed signal can be expressed as:

m _m1，m _m2+m _p1，…，m _m(M-1)+m _p(M-2)，m _mM+m _p(M-1)

The process adopting squeeze theorem method to obtain the second superposed signal and the first base station in step 512 adopt squeeze theorem to obtain method to obtain the process of the first superposed signal identical, repeat no more herein.

513, the first base station is according to the first superposed signal and the second superposed signal, obtains processing signals.

Concrete, with the 1st in the detection sequence of the first superposed signal, 2,3 ..., what M-1 component was corresponding deducts the 2nd in the detection sequence of the second superposed signal, 3 ..., M component.Can obtain:

m _m1-m _m2，m _m2-m _m3，…，m _m(M-1)-m _mM，m _mM

Certainly, the second base station also can according to the first superposed signal and the second superposed signal.Obtain processing signals, concrete step is:

With the 2nd in the detection sequence of the second superposed signal, 3 ..., what M component was corresponding deducts the 2nd in the detection sequence of the first superposed signal, 3 ..., M component.Can obtain:

m _p1-m _p2，m _p2-m _p3，…，m _pM-2)-m _p(M-1)，m _p(M-1)

Now, the first transmission signal only having the first base station in the first superposed signal after process, and the interference signal coming from other base station is completely eliminated.And only have second of the second base station to send signal in the second superposed signal after process, the interference signal coming from other base station is completely eliminated.Like this, the transmission signal that receiving terminal obtains is the signal that receiving terminal needs, and improves the efficiency of receiving terminal Received signal strength, increases the signal of receiving terminal and the ratio of noise.Meanwhile, owing to only needing feedback two pre-coding matrixes in the embodiment of the present invention, compared with prior art, need the channel information of feedback to reduce 50%, alleviate the pressure to channel feedback.

514, the first base station adopts Sequence Detection to processing signals, obtains first and sends signal.

Concrete, counteracting serial interference or dimension bit algorithm can be adopted to recover acquisition first and to send signal, also the method be applicable to can be adopted to recover to obtain the first transmission signal according to concrete implementation environment.

Herein, signal m is sent to adopt counteracting serial interference to carry out specific description recovery acquisition first _mprocess: in step 513, M element of the sequence that the first base station obtains according to the first superposed signal and the second superposed signal is m _mM, wherein m _mMbe the first transmission signal m _mm element.Therefore, the first transmission signal m can be obtained _mm element.M element in the sequence of the processing signals then obtained the first base station is added with M-1 element, obtains m _{m (M-1)}.Therefore, can be restored and obtain the first transmission signal m _mm-1 element m _{m (M-1)}.By identical method, all elements obtaining the first transmission signal finally can be recovered.

Certainly, the second base station can send the identical method of signal by adopting with the first base station check processing signal acquisition first, detects, obtain the second transmission signal to processing signals.Wherein, it is identical that the process that the second base station adopts counteracting serial interference to recover to obtain the second transmission signal and the first base station adopt counteracting serial interference to recover to obtain the process of the first transmission signal, repeats no more herein.

The method for transmitting signals that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Embodiments of the invention provide a kind of method for transmitting signals, are applied in signal downlink transmitting procedure, with reference to shown in Fig. 6, comprise the following steps:

601, first user equipment is according to channel estimation method, obtains the channel fading parameters of the first base station to the subscriber equipment corresponding with this first base station.

602, first user equipment is according to channel fading parameters, obtains channel parameter.

Concrete, first user equipment is according to channel estimation method, and the detailed process obtaining channel parameter is identical with the implementation process that the first base station in the step 501 in above-described embodiment ~ 502 obtains channel parameter, repeats no more herein.

603, first user equipment transmitting channel parameter to the first base station.

604, the first base station receives the channel parameter that first user equipment sends.

605, the first base station M dimensional vector of selecting arbitrarily each component all non-vanishing is as first precoding vector of the first pre-coding matrix.

Wherein, M is positive integer.

606, the first base station is according to the i-th-1 precoding vector of the second pre-coding matrix, obtains i-th precoding vector of the first pre-coding matrix.

Concrete, the first base station obtains the process of the first pre-coding matrix with reference to the process in step 504 in above-described embodiment, repeats no more herein.Certainly, the second base station adopts the process identical with step 504 step in above-described embodiment can obtain the second pre-coding matrix simultaneously.

607, the first base station sends the first pre-coding matrix to first user equipment.

608, first user equipment receives the first pre-coding matrix that the first base station sends.

609, the first base station receives the second transmission signal that the second base station sends.

610, the first base station sends signal and second according to first and sends signal, obtains the first signal to be sent.

Wherein, first the signal that signal is the first base station is sent.

Concrete, send the 1st, 2,3 in the detection sequence of signal with first ..., what M-1 component was corresponding deducts the 1st, 2,3 in the detection sequence of the second transmission signal ..., M-1 component.Can obtain:

m_{m}^{'} = [m_{m 1} - m_{p 1}, m_{m 2} - m_{p 2}, \cdot \cdot \cdot, m_{m (M - 1)} - m_{p (M - 1)}, m_{pM}]

Certainly, the second base station is by process, and the detailed process of the obtain second signal to be sent is:

The 1st, 2,3 in the detection sequence of signal is sent with second ..., what M-1 component was corresponding deducts the 2nd, 3 in the detection sequence of the first transmission signal ..., M component.Can obtain:

m_{p}^{'} = [m_{p 1} - m_{m 2}, \cdot \cdot \cdot, m_{p (M - 2)} - m_{m (M - 1)}, m_{p (M - 1)} - m_{mM}]

611, the first base station adopts the first pre-coding matrix to encode to the first signal to be sent, obtains the first code signal.

The first code signal generated after encoding to the first signal to be sent is:

Adopt the second pre-coding matrix to carry out coding acquisition second code signal to the second signal to be sent by identical implementation process second base station to be

The processing signals finally obtained is:

m _m1-m _m2，m _m2-m _m3，…，m _m(M-1)-m _mM，m _mM

m _m1-m _p1，m _p1-m _p2，m _p2-m _p3，…，m _pM-2)-m _p(M-1)，m _p(M-1)

Can see that the interference signal in the signal that first user equipment receives is completely eliminated, only have the signal oneself needing to detect.The signal that second subscriber equipment receives is except first dimension, and the interference signal in other dimension is all completely eliminated, and only has M-1 the data flow oneself needing to detect.Like this, the interference signal coming from other subscriber equipment in the signal that receiving terminal receives can reduce greatly.Reduce the interference signal in Received signal strength.

612, the first base station sends the first code signal to first user equipment, so that first user equipment obtains first according to the first Received signal strength send signal.

Wherein, the first Received signal strength comprises: the first code signal and the second code signal; Second code signal is that the second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Second signal to be sent is that the second base station obtains.Second signal to be sent is that the second base station sends signal and the second transmission signal acquisition according to first.

First base station sends the first code signal by the form of broadcast, and in concrete implementation process, the arbitrary receiving terminal be present in this communication system all can receive this first code signal, such as, the second base station in the embodiment of the present invention.

613, first user equipment receives the first code signal that the first base station sends.

614, first user equipment receives the second code signal that the second base station sends.

615, first user equipment is according to the first Received signal strength, obtains processing signals.

616, first user equipment detects processing signals, obtains first send signal according to the first pre-coding matrix and the second pre-coding matrix.

Concrete, squeeze theorem and minimum mean-squared error algorithm method can be adopted, recover to obtain the first transmission signal.Certainly, be not limited to, only with by these two kinds of methods, applicable detection method to be selected according to the demand of reality in concrete enforcement.

Certainly, the second subscriber equipment can, by identical method, recover to obtain the second transmission signal.

Embodiments of the invention provide a kind of first base station 7, with reference to shown in Fig. 7, comprising: acquiring unit 71, generation unit 72, transmitting element 73, receiving element 74 and detecting unit 75, wherein:

Acquiring unit 71, for according to channel estimation method, obtains channel parameter.

Generation unit 72, for according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment.

Transmitting element 73, for sending the first pre-coding matrix to first user equipment.

Receiving element 74, for receiving the first code signal that first user equipment sends.

Receiving element 74, also for receiving the second code signal that the second subscriber equipment sends.

Wherein, the second code signal is that the second subscriber equipment adopts the second pre-coding matrix to obtain the second transmission Signal coding; Second pre-coding matrix is that the second base station generates according to interference alignment algorithm.

Detecting unit 75, for detecting the first Received signal strength, obtains the first superposed signal.

Receiving element 74, also for receiving the second superposed signal that the second base station sends.

Acquiring unit 71, also for according to the first superposed signal and the second superposed signal, obtains processing signals.

The first base station that embodiments of the invention provide, by using precoded signal, making interference signal and useful signal be aligned in specific dimension at receiving terminal according to certain mode, carrying out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.

Further, with reference to shown in Fig. 8, the first base station 7 that embodiments of the invention provide also comprises: processing unit 76, wherein:

Processing unit 76, for adopting Sequence Detection to processing signals, obtaining first and sending signal.

Further, this first base station acquiring unit 71 specifically for:

According to channel estimation method, obtain the channel fading parameters of the first base station to the subscriber equipment corresponding with this first base station.

According to channel fading parameters, obtain channel parameter.

Further, with reference to shown in Fig. 9, the generation unit 72 of this first base station comprises: choose subelement 721 and obtain subelement 722, wherein:

Choose subelement 721, for the M dimensional vector of selecting arbitrarily each component all non-vanishing first precoding vector as the first pre-coding matrix.

Wherein, M is positive integer.

Obtain subelement 722, for the i-th-1 precoding vector according to the second pre-coding matrix, obtain i-th precoding vector of the first pre-coding matrix.

The first base station that embodiments of the invention provide, by using precoded signal, making interference signal and useful signal be aligned in specific dimension at receiving terminal according to certain mode, carrying out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Embodiments of the invention provide a kind of first user equipment 8, with reference to shown in Figure 10, comprising: receiving element 81, processing unit 82 and transmitting element 83, wherein:

Receiving element 81, for receiving the first pre-coding matrix that the first base station sends.

Processing unit 82, encoding for sending signal according to the first pre-coding matrix to first, obtaining the first code signal.

Transmitting element 83, for sending the first code signal to the first base station, so that the first base station obtains according to the first Received signal strength do not have noisy signal.

The first user equipment that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Embodiments of the invention provide a kind of first base station 9, with reference to shown in Figure 11, comprising: receiving element 91, generation unit 92, transmitting element 93, acquiring unit 94 and processing unit 95, wherein:

Receiving element 91, for receiving the channel parameter that first user equipment sends.

Generation unit 92, for according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment.

Transmitting element 93, for sending the first pre-coding matrix to first user equipment.

Receiving element 94, also send for receiving the second base station second sends signal.

Acquiring unit 95, sending signal for sending signal and second according to first, obtaining the first signal to be sent.

Wherein, first the signal that signal is the first base station is sent.

Processing unit 96, for adopting the first pre-coding matrix to encode to the first signal to be sent, obtains the first code signal.

Transmitting element 93, also for sending the first code signal to first user equipment, so that first user equipment obtains first according to the first Received signal strength send signal.

Further, with reference to shown in Figure 12, the generation unit 92 of this first base station, also comprises: choose subelement 921 and obtain subelement 922, wherein:

Choose subelement 921, for the M dimensional vector of selecting arbitrarily each component all non-vanishing first precoding vector as the first pre-coding matrix.

Wherein, M is positive integer.

Obtain subelement 922, for the i-th-1 precoding vector according to the second pre-coding matrix, obtain i-th precoding vector of the first pre-coding matrix.

Embodiments of the invention provide a kind of first user equipment 10, with reference to shown in Figure 13, comprise acquiring unit 1001, transmitting element 1002 and receiving element 1003, wherein:

Acquiring unit 1001, for according to channel estimation method, obtains channel parameter.

Transmitting element 1002, for transmitting channel parameter to the first base station.

Receiving element 1003, for receiving the first pre-coding matrix that the first base station sends.

Receiving element 1003, also for receiving the first code signal that the first base station sends.

Receiving element 1003, also for receiving the second code signal that the second base station sends.

Acquiring unit 1001, also for according to the first Received signal strength, obtains processing signals.

Wherein, the first Received signal strength comprises: the first code signal and the second code signal.

The first user equipment that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.

Further, with reference to shown in Figure 14, this first user equipment also comprises: processing unit 1004, wherein:

Processing unit 1004, for detecting processing signals, obtaining first according to the first pre-coding matrix and the second pre-coding matrix and sending signal.

Further, acquiring unit 1001 specifically for:

According to channel fading parameters, obtain channel parameter.

The first user equipment that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, reduce the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Embodiments of the invention provide a kind of first base station 11, with reference to shown in Figure 15, comprise: at least one processor 1101, memory 1102, communication interface 1103 and bus 1104, at least one processor 1101, memory 1102 and communication interface 1103 are connected by bus 1104 and complete mutual communication, memory 1101 for program code stored, wherein:

This bus 1104 can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component Interconnect, referred to as PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, referred to as EISA) bus etc.This bus 1104 can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 15, but not representing the bus only having a bus or a type.Wherein:

Memory 1102 is for program code stored, and this program code comprises operational order.Memory 1102 may comprise high-speed RAM memory, still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.

Processor 1101 may be a central processing unit (Central Processing Unit, referred to as CPU), or specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.

Communication interface 1103, is mainly used in realizing the communication between the device in the present embodiment.

Processor 1101, also for calling the program code in memory 1102, in order to perform following operation:

According to channel estimation method, obtain channel parameter.

According to interference alignment algorithm, generate the first pre-coding matrix of each data flow of first user equipment.

Send the first pre-coding matrix to first user equipment.

Receive the first code signal that first user equipment sends.Wherein, the first code signal is that employing first pre-coding matrix obtains the first transmission Signal coding.

Receive the second code signal that the second subscriber equipment sends.

First Received signal strength is detected, obtains the first superposed signal.

Receive the second superposed signal that the second base station sends.

According to the first superposed signal and the second superposed signal, obtain processing signals.

Further, processor 1101, also for adopting Sequence Detection to processing signals, obtaining first and sending signal.

Further, processor 1101, specifically for:

According to channel fading parameters, obtain channel parameter.

Further, processor 1101, specifically for:

The all non-vanishing M dimensional vector of any selection each component is as first precoding vector of the first pre-coding matrix.Wherein, M is positive integer.

According to the i-th-1 precoding vector of the second pre-coding matrix, obtain i-th precoding vector of the first pre-coding matrix.

Embodiments of the invention provide a kind of first user equipment 12, with reference to shown in Figure 16, comprise: at least one processor 1201, memory 1202, communication interface 1203 and bus 1204, at least one processor 1201, memory 1202 and communication interface 1203 are connected by bus 1204 and complete mutual communication, memory 1201 for program code stored, wherein:

This bus 1204 can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component Interconnect, referred to as PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, referred to as EISA) bus etc.This bus 1204 can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 16, but not representing the bus only having a bus or a type.Wherein:

Memory 1202 is for program code stored, and this program code comprises operational order.Memory 1202 may comprise high-speed RAM memory, still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.

Processor 1201 may be a central processing unit (Central Processing Unit, referred to as CPU), or specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.

Communication interface 1203, is mainly used in realizing the communication between the device in the present embodiment.

Processor 1201, also for calling the program code in memory 1202, in order to perform following operation:

Receive the first pre-coding matrix that the first base station sends.

Send signal according to the first pre-coding matrix to first to encode, obtain the first code signal.

Send the first code signal to the first base station, so that the first base station obtains according to the first Received signal strength do not have noisy signal.

Embodiments of the invention provide a kind of first base station 13, with reference to shown in Figure 17, comprise: at least one processor 1301, memory 1302, communication interface 1303 and bus 1304, at least one processor 1301, memory 1302 and communication interface 1303 are connected by bus 1304 and complete mutual communication, memory 1301 for program code stored, wherein:

This bus 1304 can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component Interconnect, referred to as PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, referred to as EISA) bus etc.This bus 1304 can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 17, but not representing the bus only having a bus or a type.Wherein:

Memory 1302 is for program code stored, and this program code comprises operational order.Memory 1302 may comprise high-speed RAM memory, still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.

Processor 1301 may be a central processing unit (Central Processing Unit, referred to as CPU), or specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.

Communication interface 1303, is mainly used in realizing the communication between the device in the present embodiment.

Processor 1301, also for calling the program code in memory 1302, in order to perform following operation:

Receive the channel parameter that first user equipment sends.

Send the first pre-coding matrix to first user equipment.

Receive the second transmission signal that the second base station sends.

Send signal and second according to first and send signal, obtain the first signal to be sent.Wherein, first the signal that signal is the first base station is sent.

Adopt the first pre-coding matrix to encode to the first signal to be sent, obtain the first code signal.

Send the first code signal to first user equipment, so that first user equipment obtains first according to the first Received signal strength send signal.

Further, processor 1301, specifically for:

The all non-vanishing M dimensional vector of any selection each component is as first precoding vector of the first pre-coding matrix.

Wherein, M is positive integer.

Embodiments of the invention provide a kind of first user equipment 14, with reference to shown in Figure 18, comprise: at least one processor 1401, memory 1402, communication interface 1403 and bus 1404, at least one processor 1401, memory 1402 and communication interface 1403 are connected by bus 1404 and complete mutual communication, memory 1401 for program code stored, wherein:

This bus 1404 can be industry standard architecture (Industry Standard Architecture, referred to as ISA) bus, peripheral component interconnect (Peripheral Component Interconnect, referred to as PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, referred to as EISA) bus etc.This bus 1404 can be divided into address bus, data/address bus, control bus etc.For ease of representing, only representing with a thick line in Figure 18, but not representing the bus only having a bus or a type.Wherein:

Memory 1402 is for program code stored, and this program code comprises operational order.Memory 1402 may comprise high-speed RAM memory, still may comprise nonvolatile memory (non-volatile memory), such as at least one magnetic disc store.

Processor 1401 may be a central processing unit (Central Processing Unit, referred to as CPU), or specific integrated circuit (Application Specific Integrated Circuit, referred to as ASIC), or be configured to the one or more integrated circuits implementing the embodiment of the present invention.

Communication interface 1403, is mainly used in realizing the communication between the device in the present embodiment.

Processor 1401, also for calling the program code in memory 1402, in order to perform following operation:

According to channel estimation method, obtain channel parameter.

Transmitting channel parameter to the first base station.

Receive the first pre-coding matrix that the first base station sends.

Receive the first code signal that the first base station sends.

Wherein, the first code signal is that employing first pre-coding matrix is encoded to the first signal to be sent and obtained; First signal to be sent is that the first base station sends signal and the second transmission signal acquisition according to first.

Receive the second code signal that the second base station sends.

According to the first Received signal strength, obtain processing signals; Wherein, the first Received signal strength comprises: the first code signal and the second code signal.

Further, processor 1401, also for detecting processing signals, obtaining first according to the first pre-coding matrix and the second pre-coding matrix and sending signal.

Further, processor 1401, specifically for:

According to channel fading parameters, obtain channel parameter.

Embodiments of the invention provide a kind of signal transmission system, with reference to shown in Figure 19, comprising: the first base station a, the second base station b, first user equipment c and the second subscriber equipment d, wherein:

First base station a is arbitrary first base station in the embodiment of Fig. 7 ~ 9 correspondence; First user equipment c is the first user equipment in the embodiment that Figure 10 is corresponding.

Or the first base station a is the first base station in the embodiment that Figure 15 is corresponding; First user equipment c is the first user equipment in the embodiment that Figure 16 is corresponding.

Second base station b, for sending the second superposed signal to the first base station a; Generate the second pre-coding matrix.Wherein, the second superposed signal is that the second base station is detected the second Received signal strength and obtained; Second Received signal strength comprises: the first code signal and the second code signal.

Second subscriber equipment d, for sending the second pre-coding matrix to the first base station.Send signal according to the second pre-pre-coding matrix to second to encode, obtain the second code signal.

The signal transmission system that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, avoid the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Embodiments of the invention provide a kind of signal transmission system, with reference to shown in Figure 20, comprising: the first base station e, the second base station f, first user equipment g and the second subscriber equipment h, wherein:

First base station e is the first base station in the embodiment of Figure 11 or 12 correspondences; First user equipment g is the first user equipment in the embodiment of Figure 13 or 14 correspondences.

Or the first base station e is the first base station in the embodiment that Figure 17 is corresponding; First user equipment g is the first user equipment in the embodiment that Figure 18 is corresponding.

Second base station f, sends a signal to the first base station e for sending second; Send the second code signal to first user equipment g; Generate the second pre-coding matrix.

Second subscriber equipment g, for carrying out transfer of data with the second base station f.

The signal transmission system that embodiments of the invention provide, by using precoded signal, interference signal and useful signal is made to be aligned in specific dimension at receiving terminal according to certain mode, carry out joint-detection, reduce the interference of interchannel in Signal transmissions, reduce the pressure to channel feedback simultaneously.And then, the receiving efficiency of Received signal strength can be improved.

Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by device is divided into different functional modules, to complete all or part of function described above.The system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.

In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described module or unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that the technical scheme of the application contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform all or part of step of method described in each embodiment of the application.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, be called for short ROM), random access memory (Random Access Memory, be called for short RAM), magnetic disc or CD etc. various can be program code stored medium.

The above, above embodiment only in order to the technical scheme of the application to be described, is not intended to limit; Although with reference to previous embodiment to present application has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the application.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims

1. a method for transmitting signals, is characterized in that, comprising:

Send described first pre-coding matrix to described first user equipment;

2. method according to claim 1, is characterized in that, described according to described first superposed signal and described second superposed signal, after obtaining processing signals, also comprises:

3. method according to claim 1 and 2, is characterized in that, described first base station, according to channel estimation method, obtains channel parameter, comprising:

4. method according to claim 1 and 2, is characterized in that, described according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of first user equipment, comprising:

5. a method for transmitting signals, is characterized in that, comprising:

6. a method for transmitting signals, is characterized in that, comprising:

Send described first pre-coding matrix to described first user equipment;

Receive the second transmission signal that the second base station sends;

7. method according to claim 6, is characterized in that, described according to interference alignment algorithm, generates the first pre-coding matrix of each data flow of described first user equipment, comprising:

8. a method for transmitting signals, is characterized in that, comprising:

Send described channel parameter to the first base station;

Receive the first pre-coding matrix that described first base station sends;

Receive the second code signal that described second base station sends; Wherein, described second code signal is that described second base station adopts the second pre-coding matrix to encode to the second signal to be sent to obtain; Described second signal to be sent is that described second base station sends signal and the second transmission signal acquisition according to first; Described second pre-coding matrix is that described second base station generates;

9. method according to claim 8, is characterized in that, described according to the first Received signal strength, after obtaining processing signals, also comprises:

10. method according to claim 8 or claim 9, it is characterized in that, described first user equipment, according to channel estimation method, obtains channel parameter, comprising:

11. a kind of first base station, is characterized in that, comprising:

12. first base stations according to claim 11, is characterized in that, also comprise:

13. the first base stations according to claim 11 or 12, is characterized in that, described acquiring unit specifically for:

14. the first base stations according to claim 11 or 12, it is characterized in that, described generation unit comprises:

15. 1 kinds of first user equipment, is characterized in that, comprising:

16. a kind of first base station, is characterized in that, comprising:

17. first base stations according to claim 16, it is characterized in that, described generation unit comprises:

18. 1 kinds of first user equipment, is characterized in that, comprising:

19. first user equipment according to claim 18, is characterized in that, described first user equipment also comprises:

20. first user equipment according to claim 18 or 19, is characterized in that, described acquiring unit specifically for:

21. 1 kinds of signal transmission systems, is characterized in that, comprising: the first base station, the second base station, first user equipment and the second subscriber equipment, wherein:

Described first base station is arbitrary the first described base station of claim 11 ~ 14; Described first user equipment is first user equipment according to claim 15;

22. 1 kinds of signal transmission systems, is characterized in that, comprising: the first base station, the second base station, first user equipment and the second subscriber equipment, wherein:

Described first base station is the first base station described in claim 16 or 17; Described first user equipment is the arbitrary described first user equipment of right 18 ~ 20;