CN104113500B - A kind of channel equalization method and recoding processing method, relevant apparatus and system - Google Patents

A kind of channel equalization method and recoding processing method, relevant apparatus and system Download PDF

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CN104113500B
CN104113500B CN201310139636.XA CN201310139636A CN104113500B CN 104113500 B CN104113500 B CN 104113500B CN 201310139636 A CN201310139636 A CN 201310139636A CN 104113500 B CN104113500 B CN 104113500B
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signal
channel
transmission
power
reference signal
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CN104113500A (en
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刘云
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The embodiment of the invention discloses a kind of reference signal nonlinear pre-coding processing method, including:Transmission signal is generated after reference signal is carried out into precoding processing, wherein, handled for the reference signal without modulus;When the transmission power of the transmission signal exceedes preset power threshold, the transmission power of the transmission signal is subjected to back-off processing;Transmission power after being handled according to rollback sends the transmission signal to receiving node.The embodiment of the invention also discloses a kind of channel equalization method based on reference signal, relevant apparatus and system.Using the present invention, the transmission power of sending node end reference signal can be effectively reduced.

Description

A kind of channel equalization method and recoding processing method, relevant apparatus and system
Technical field
The present invention relates to the communications field, more particularly to a kind of reference signal nonlinear precoding method, channel equalization method, Relevant apparatus and system.
Background technology
In descending MU-MIMO(How defeated Multiple User-Multiple Input Multiple Output, multi-user is Enter multi output, abbreviation MU-MIMO)In communication system, transmitting node passes through many of spatial reuse in identical time-frequency domain resources Location mode, different data are sent to multiple receiving nodes.In this case, transmitting node needs to use correlation technique as far as possible To separate the channel of each receiving node, interfering between each receiving node is eliminated, so that system handling up always Amount is maximum.There are a variety of MU-MIMO technical schemes in theory at present, these methods can generally be divided into non-linear and linear pre- Encode two classes.Nonlinear precoding method mainly has based on DPC(Dirty Paper Coding, dirty paper code, abbreviation DPC)、 THP(Tomlinson-Harashima Precoding, THP precodings)With a class method of Vector Precoding.Linear predictive coding Method mainly has channel inversion algorithm and maximizes SLNR(Signal-to leakage-noise ratio, signals leakiness noise Than)Criterion algorithm.
Nonlinear precoding method based on modulus solve the problems, such as sending node interference cancellation band come power lifting, but The equivalent channel undergone for accurate estimated data, it is ensured that receiving node is correctly demodulated, and reference signal can not carry out modulus operation, Causing the transmission power of reference signal part still can increase, and the peak power of transmitting node is usually fixed, so meeting Cause the reduction of transmit power utilization ratio.
The content of the invention
Technical problem to be solved of the embodiment of the present invention be there is provided a kind of reference signal nonlinear precoding method, Channel equalization method, relevant apparatus and system.Sending node reference signal transmission power lifting in the prior art can be solved the problems, such as.
In order to solve the above-mentioned technical problem, first aspect present invention provides a kind of reference signal nonlinear precoding side Method, including:
Transmission signal is generated after reference signal is carried out into precoding processing, wherein, for the reference signal without asking Mould processing;
Calculate the power Uplifting amount of transmission power of the transmission power relative to the reference signal of the transmission signal;
If the power Uplifting amount exceedes preset power threshold, by the carry out back-off processing of the transmission signal;
Transmission power after being handled according to rollback sends the transmission signal to receiving node.
It is described that reference signal is subjected to generation transmission signal after precoding processing in the first possible implementation Step includes:
Obtain the channel information matrix H of the down channel of the transmission transmission signal;
The channel information matrix H is carried out to obtain coefficient matrix F and coefficient matrix B after the orthogonal LQ of lower triangle is decomposed;
The transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
It is described by institute in second of possible implementation with reference to the first possible implementation of first aspect The step of transmission power for stating transmission signal carries out back-off processing includes:
Calculate the back-off value of the transmission signal;
Quantization encoding processing is carried out to the back-off value and obtains back-off grade, the back-off grade is used for Indicate the reduction amount of the transmission power of the transmission signal.
With reference to second of possible implementation of first aspect, in the third possible implementation, in addition to:
The side that signaling will be passed through including the description information for describing the reference signal and data-signal that modulus is identified Formula is sent to the receiving node, wherein, the modulus is identified for indicating whether for being sent with the reference signal simultaneously Data-signal carry out modulus processing.
With reference to the third possible implementation of first aspect, in the 4th kind of possible implementation, the description Information also include the back-off grade, it is described by including modulus identify be used for the reference signal and data-signal are described Description information include the step of sent by way of signaling to the receiving node:
Modulus mark and the back-off grade are subjected to combined coding mapping and obtain mapping table.
With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, if the institute Power Uplifting amount is stated more than preset power threshold, before the step of the carry out back-off processing of the transmission signal, also Including:
The channel quality parameter of the down channel of the detection transmission transmission signal, wherein, the channel parameter values are bigger Represent that the quality of the down channel is better, the smaller quality for representing the down channel of the channel parameter values is poorer;
If the channel quality parameter is more than preset threshold value, perform when the transmission power of the transmission signal exceedes During preset power threshold, the step of transmission power of the transmission signal is subjected to back-off processing.
Any of the 5th kind of possible implementation with reference to first aspect to first aspect, it is possible at the 6th kind In implementation, in addition to:
If the channel quality parameter is less than the preset threshold value, believed using the coefficient matrix F and the reference Number obtain the transmission signal and do not carry out back-off processing for the transmission signal.
Second aspect of the present invention provides a kind of channel equalization method based on reference signal, including:
Transmission signal and description information that sending node is sent are received by down channel, wherein, the description information Including for representing that the sending node carries out the back-off grade of back-off processing to the transmission signal.
According to the reference signal recovered from the transmission signal, and obtain the reference signal channel of the down channel Information;
According to the back-off grade and the reference signal channel information, to the data transmitted in the down channel Signal carries out channel equalization.
It is described to be believed according to the back-off grade and the reference signal channel in the first possible implementation Breath, carrying out channel equalization step to the data-signal transmitted in the down channel includes:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The reference signal channel information is gone divided by the power back-off factors, data signal channel information is obtained;
Channel equalization is carried out to the data-signal using the data signal channel information.
With reference to the first possible implementation of second aspect, in second of possible implementation, the basis The back-off grade and the reference signal channel information, channel is carried out to the data-signal transmitted in the down channel The step of equilibrium treatment, includes:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The receiving node is multiplied by the power back-off factors to the data-signal received;
Channel is carried out to the data-signal being multiplied by after power back-off factors using the reference signal channel information equal Weighing apparatus processing.
Any of second of possible implementation with reference to second aspect to second aspect, it is possible at the third In implementation, the description information also includes being used to indicate whether to carry out at modulus for the reference signal of the sending node The modulus mark of reason.
Third aspect present invention provides a kind of reference signal nonlinear precoding processing unit, including:
Precoding processing module, for generating transmission signal after reference signal is carried out into precoding processing, wherein, for institute Reference signal is stated to handle without modulus;
Computing module, for calculating the transmission power of the transmission signal relative to the ginseng for not carrying out precoding processing Examine the power Uplifting amount of the transmission power of signal;
Power control module, if exceeding preset power threshold for the power Uplifting amount, by the transmission signal Carry out back-off processing;
Signal emission module, the transmission power after being handled according to rollback sends the transmission signal to receiving node.
In the first possible implementation, precoding processing module includes:
Channel information acquisition unit, the channel information matrix H of the down channel for obtaining the transmission transmission signal;
Matrix decomposition unit, for carrying out obtaining coefficient square after the orthogonal LQ of lower triangle is decomposed to the channel information matrix H Battle array F and coefficient matrix B;
Transmission signal generation unit, the transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
With reference to the first possible implementation of the third aspect, in second of possible implementation, the power Control module includes:
Fallback value computing unit, the back-off value for calculating the transmission signal;
Quantization encoding unit, back-off grade, institute are obtained for carrying out quantization encoding processing to the back-off value State the reduction amount that back-off grade is used to indicate the transmission power of the transmission signal.
With reference to second of possible implementation of the third aspect, in the third possible implementation, in addition to:
Signaling sending module, for the description for describing the reference signal and data-signal that will be identified including modulus Information is sent by way of signaling to the receiving node, wherein, the modulus identify for indicate whether be directed to it is described The data-signal that reference signal is sent simultaneously carries out modulus processing.
With reference to the third possible implementation of the third aspect, in the 4th kind of possible implementation, the description Information also includes the back-off grade, and the signaling sending module includes:
Mapping table generation unit, maps for modulus mark and the back-off grade to be carried out into combined coding To mapping table.
With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, in addition to:
Channel quality detection module, the channel quality parameter of the down channel for detecting the transmission transmission signal, if The channel quality parameter is more than preset threshold value, it indicates that the power control module work, wherein, the channel parameter Value is bigger, and the quality for representing the down channel is better, and the smaller quality for representing the down channel of the channel parameter values is poorer.
Any of the 5th kind of possible implementation with reference to the third aspect to the third aspect, it is possible at the 6th kind In implementation, in addition to:
Adjusting module, if being less than the preset threshold value for the channel quality parameter, utilizes the coefficient matrix F The transmission signal is obtained with the reference signal and does not carry out back-off processing for the transmission signal.
Fourth aspect present invention provides a kind of channel equalization means based on reference signal, including:
Transmission signal receiving module, for receiving transmission signal and the description letter that sending node is sent by down channel Breath, wherein, the description information includes being used to represent that the sending node carries out back-off processing to the transmission signal Back-off grade.
Channel information computing module, the reference signal recovered for basis from the transmission signal, and obtain described The reference signal channel information of down channel;
Channel equalization module, for according to the back-off grade and the reference signal channel information, under described The data-signal transmitted in row channel carries out channel equalization.
In the first possible implementation, the channel equalization module includes:
First acquisition unit, for according to corresponding back-off in the preset mapping table of the back-off ranked queries The factor;
First computing unit, for the reference signal channel information to be gone divided by the power back-off factors, is counted It is believed that number channel information;
First balanced unit, for being carried out using the data signal channel information to the data-signal at channel equalization Reason.
With reference to fourth aspect, in second of possible implementation, the channel equalization module includes:
Second acquisition unit, for according to corresponding back-off in the preset mapping table of the back-off ranked queries The factor;
Second computing unit, for the receiving node data-signal received is multiplied by the back-off because Son;
Second balanced unit, for using the reference signal channel information to the number being multiplied by after power back-off factors It is believed that number progress channel equalization.
Any of second of possible implementation with reference to fourth aspect to fourth aspect, it is possible at the third In implementation, the description information also includes being used to indicate whether to carry out at modulus for the reference signal of the sending node The modulus mark of reason.
Fifth aspect present invention provides a kind of reference signal nonlinear precoding processing system, including:
The third aspect is to any of the 6th kind of possible implementation of third aspect processing unit;And/or
Fourth aspect is to any of the third possible implementation of fourth aspect balancer.
Implement the present invention, have the advantages that:
Transmission signal is generated by the precoding processing that non-modulus is carried out to reference signal, if the power of detection transmission signal When lifting dose rate exceedes preset power threshold, the transmission power of the transmission signal sent after back-off processing to connecing Receive node, it is to avoid in the prior art, reference signal transmission power increase after sending node carries out precoding processing, more than hair Send the peak power of node and lead to not the deficiency of normal work.
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, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of reference signal nonlinear pre-coding processing method of the embodiment of the present invention;
Fig. 2 is a kind of another schematic flow sheet of reference signal nonlinear pre-coding processing method of the embodiment of the present invention;
Fig. 3 is a kind of structural representation of reference signal nonlinear precoding processing unit of the embodiment of the present invention;
Fig. 4 is a kind of another structural representation of reference signal nonlinear precoding processing unit of the embodiment of the present invention;
Fig. 5 is the structural representation of precoding processing module in Fig. 4;
The structural representation of power control module in Fig. 6 Fig. 4;
Fig. 7 is the structural representation of signaling sending module in Fig. 4;
Fig. 8 is a kind of another structural representation of reference signal nonlinear precoding processing unit of the embodiment of the present invention;
Fig. 9 is a kind of schematic flow sheet of channel equalization method based on reference signal of the embodiment of the present invention;
Figure 10 is a kind of structural representation of channel equalization means based on reference signal of the embodiment of the present invention;
Figure 11 is the structural representation of channel equalization module in Figure 10;
Figure 12 is another structural representation of channel equalization module in Figure 10;
Figure 13 is a kind of another structural representation of channel equalization means based on reference signal of the embodiment of the present invention;
Figure 14 is a kind of structural representation of reference signal nonlinear precoding processing system of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
It is a kind of schematic flow sheet of reference signal non-uniform encoding processing method of the embodiment of the present invention referring to Fig. 1, should Method includes:
Step 101, will reference signal carry out precoding processing after generate transmission signal, wherein, for the reference signal Handled without modulus.
Specifically, reference signal(Reference Signal)As pilot signal, for being measured to channel quality And channel estimation, in order to which the data-signal that receiving node is sent to sending node carries out relevant detection and demodulates.Sending node Transmission signal is generated after reference signal first is carried out into precoding processing, then sends the transmission signal to receiving node, in order to Ensure that reference signal is not distorted, sending node does not carry out modulus processing to reference signal.To reference signal precoding processing Method can be DPC(Dirty Paper Coding, dirty paper code, abbreviation DPC)Coding, it would however also be possible to employ other coding staffs Formula, the present invention is not restricted, and the present embodiment carries out the transmitting after THP precoding processings by taking THP precodings as an example to reference signal Signal is
xRS=FB-1aRS
Wherein aRSFor reference signal, xRSFor the transmission signal after precoding processing, sending node by receive section feedback or The channel information matrix H of down channel is obtained by methods such as channel reciprocities, sending node carries out LQ to channel information matrix H Decomposing H=SFH, wherein, S ∈ CK×KFor left inferior triangular flap, F ∈ CN×KIt is tenth of the twelve Earthly Branches matrix.The result structural matrix decomposed using LQskkIt is matrix S diagonal entry, and then structural matrix B=GS, obtain diagonal entry and be all 1 Left inferior triangular flap B, bkiFor B row k l column elements.
Step 102, the transmission power of the calculating transmission signal are relative to the reference letter for not carrying out precoding processing Number transmission power power Uplifting amount.
Specifically, modulus processing is carried out to transmission signal can limit signal transmission power, in order to prevent reference signal Distortion, does not carry out modulus processing, now the transmission power and reference signal of transmission signal after step 101 precoding processing Compared to being improved, the power Uplifting amount of the transmission power of transmission signal and the transmission power relative to reference signal is calculated.
If step 103, the power Uplifting amount exceed preset power threshold, the carry out power of the transmission signal is returned Move back processing.
Specifically, the transmission power of sending node is fixed, if the power Uplifting amount of the transmission signal is more than preset The maximum for reaching system of the transmission power of power threshold, i.e. sending node, the transmission power to the transmission signal carries out work( The processing of rate rollback, makes the transmission power of whole transmission signal be adjusted in normal power bracket.
Step 104, handled according to rollback after transmission power the transmission signal is sent to receiving node.
Implement embodiments of the invention, transmission signal generated by the precoding processing that non-modulus is carried out to reference signal, If detect that the power lifting dose rate of transmission signal exceedes preset power threshold, the transmission power to the transmission signal carries out work( Sent after the processing of rate rollback to receiving node, it is to avoid in the prior art, reference signal carries out precoding processing in sending node Transmission power increase, the deficiency of normal work is led to not more than the peak power of sending node afterwards.
It is that a kind of another flow of reference signal nonlinear pre-coding processing method of the embodiment of the present invention is shown referring to Fig. 2 It is intended to, this method includes:
The channel information matrix H of step 201, the down channel of acquisition transmitting signal, to the channel information matrix H Sytem matrix F and sytem matrix B are obtained after carrying out value decomposition, is generated according to coefficient matrix F, coefficient matrix B and reference signal Transmission signal.
Specifically, sending node is by receiving section feedback or the channel of down channel being obtained by methods such as channel reciprocities Information matrix H, LQ is carried out to channel information matrix H(Lower triangular Quadrate, lower triangle is orthogonal)Value decomposition After obtain coefficient matrix F and sytem matrix B matrixes, the method for LQ value decompositions is as follows:
H=SFH
Wherein, matrix S is lower-left triangular matrix, and matrix F is tenth of the twelve Earthly Branches matrix, utilizes the result structural matrix of LQ value decompositionsskkIt is matrix S diagonal entry, and then structural matrix B=GS, obtain diagonal entry and be all 1 Left inferior triangular flap B.It is to the transmission signal that reference signal is carried out after DPC precoding processings
Wherein bklFor matrix B element, aRSFor reference signal, being write as matrix form is
Then it is weighted processing with F matrixs again and obtains the signal after THP precodings
xRS=FB-1aRS
xRSFor the transmission signal after precoding processing.
Whether step 202, the channel quality parameter of the detection transmission down channel for sending signal are more than preset door Limit value.
Specifically, the acquisition methods of the channel quality parameter of down channel can be that receiving node feedback or sending node are logical Channel reciprocity acquisition is crossed, channel quality parameter includes SNR(Signal to Noise Ratio, signal to noise ratio, abbreviation SNR)Or CQI(Channel Quality Indicator, CQI, abbreviation CQI), channel parameter values are bigger to be represented under this The quality of row channel is better, and the smaller quality for representing the down channel of the channel parameter values is poorer.When detecting channel quality When parameter is more than preset threshold value, step 203 is performed, otherwise, step 204 is performed.
Step 203, the transmission power of the calculating transmission signal are relative to the reference letter for not carrying out precoding processing Number transmission power power Uplifting amount.
Step 204, obtain using the sytem matrix F and the reference signal transmission signal and be not directed to the transmitting Signal carries out back-off processing.
Specifically, sending node is using being multiplied by F coefficient matrixes in reference signal, and encoded without DPC, obtain transmitting letter Number be xRS=FaRS.Because F coefficient matrixes are unitary matrice, so now the transmission power of transmission signal is equal with reference signal, therefore Back-off processing need not be carried out.
Step 205, judge the power Uplifting amount whether exceed preset power threshold.
Specifically, sending node judges whether the power Uplifting amount of transmission signal exceedes preset power threshold, if judging It is yes, performs step 206, otherwise, performs step 207.
Step 206, routinely flow processing.
Step 207, the back-off value for calculating the transmission signal;Quantization encoding processing is carried out to the back-off value Back-off grade is obtained, the back-off grade is used for the reduction amount for indicating the transmission power of the transmission signal.
Specifically, sending node calculates the back-off value γ of transmission signal,
Back-off value γ steppings are quantified as different power back-off factors β, for example, back-off value are quantified as 4 Level, can use following quantization method, by taking back-off grade 1 as an example, the method for table 1 represents the transmission signal calculated When back-off value is between -4dB and -2dB, then the interval value arbitrary value is quantified as -4dB, back-off grade 1 is entered Row is encoded to 10.Power back-off factors β after quantifying in the example, back-off value γ scope is merely illustrative, in practice may be used To be quantified according to best performance principle, β selection will ensure the power lifting for causing successive interference cancellation in precoding Lower, it is ensured that transmission power is no more than and does not carry out the transmission power before precoding.Transmission power to transmission signal carries out work( The processing of rate rollback, obtains the transmission signal x after power adjustmentRS=βFB-1aRS
Coding Back-off grade Power back-off factors β Back-off value γ
00 0 -2DB - 2DB≤γ < 0DB
01 1 -4DB - 4DB≤γ < -2DB
10 2 -6DB - 6DB≤γ < -4DB
11 3 -8DB - 8DB≤γ < -6DB
Table 1
Step 208, by what is identified including modulus it is used to describe the description information of the reference signal by way of signaling Send to receiving node.
Specifically, modulus is identified for indicating whether to be directed to the reference signal while the data-signal sent is asked Mould processing., as 0 in table 1 represents not modulus, 1 expression modulus.It is preferred that, back-off grade and modulus can be identified into Row combined coding represents that the 1st represents modulus into a mapping table, coding form as shown in Figure 3 using 3 bits Represent, the 2nd and the 3rd expression back-off grade, the power back-off factors in the back-off grade corresponding table 1.Send Node sends the description information for being used to describe the reference signal identified including modulus to reception section by way of signaling Point.
Coding Modulus identifies ModFlg
0 Not modulus
1 Modulus
Table 2
Coding Modulus identifies ModFlg Back-off grade
000 Not modulus 0
101 Modulus 1
111 Modulus 2
110 Modulus 3
Table 3
Step 209, handled according to rollback after transmission power the transmission signal is sent to receiving node.
Specifically, sending node power is adjusted after transmission signal xRS=βFB-1aRSSend to receiving node.
Implement embodiments of the invention, transmission signal generated by the precoding processing that non-modulus is carried out to reference signal, If detect that the power lifting dose rate of transmission signal exceedes preset power threshold, the transmission power to the transmission signal carries out work( Sent after the processing of rate rollback to receiving node, it is to avoid in the prior art, reference signal carries out precoding processing in sending node Transmission power increase, the deficiency of normal work is led to not more than the peak power of sending node afterwards.
It is a kind of structural representation of reference signal nonlinear precoding processing unit of the embodiment of the present invention referring to Fig. 3, Hereinafter referred to as processing unit 1, the processing unit 1 includes:
Precoding processing module 11, for generating transmission signal after reference signal is carried out into precoding processing, wherein, for The reference signal is handled without modulus.
Specifically, precoding processing module 11 can be DPC to the method for reference signal precoding processing(Dirty Paper Coding, dirty paper code, abbreviation DPC)Coding, it would however also be possible to employ other coded systems, the present invention is not restricted, this reality Example is applied so that DPC is encoded as an example, the transmission signal that precoding processing module 11 is carried out after DPC precoding processings to reference signal is
xRS=FB-1aRS
Wherein aRSFor reference signal, xRSFor the transmission signal after precoding processing.Sending node by receive section feedback or The channel information matrix H of down channel is obtained by methods such as channel reciprocities, sending node enters line number to channel information matrix H Value obtains coefficient matrix F and coefficient matrix B after decomposing, and coefficient matrix F is unitary matrice.
Computing module 12, for calculating the transmission power of the transmission signal relative to not carrying out described in precoding processing The power Uplifting amount of the transmission power of reference signal.
Power control module 13, if exceeding preset power threshold for the power Uplifting amount, by the transmission signal Carry out back-off processing.
Specifically, modulus processing is carried out to transmission signal can limit signal transmission power, in order to prevent reference signal Distortion, precoding processing module 11 does not carry out modulus processing to reference signal, and now the transmission power of transmission signal is believed with reference Number compared to being improved, the transmission power of sending node is fixed, if power control module 13 detects the power of transmission signal Uplifting amount reaches the maximum of system more than the transmission power of preset power threshold, i.e. sending node, to the transmission signal Transmission power carries out back-off processing, the transmission power of whole transmission signal is adjusted in normal power bracket.
Signal emission module 14, the transmission power after being handled according to rollback sends the transmission signal to receiving node.
Implement embodiments of the invention, transmission signal generated by the precoding processing that non-modulus is carried out to reference signal, If detect that the power lifting dose rate of transmission signal exceedes preset power threshold, the transmission power to the transmission signal carries out work( Sent after the processing of rate rollback to receiving node, it is to avoid in the prior art, reference signal carries out precoding processing in sending node Transmission power increase, the deficiency of normal work is led to not more than the peak power of sending node afterwards.
Further, it is a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention referring to Fig. 4-Fig. 7 Another structural representation, except precoding processing module 11, computing module 12, power control module 13 and signal emission module Outside 14, in addition to:
Signaling sending module 15, for being used for of being identified including modulus to be described into retouching for the reference signal and data-signal Information is stated to send by way of signaling to the receiving node, wherein, the modulus is identified for indicating whether to be directed to and institute Reference signal is stated while the data-signal sent carries out modulus processing.
Channel quality detection module 17, the channel quality parameter of the down channel for detecting the transmission transmission signal, If the channel quality parameter is more than preset threshold value, it indicates that power control module 12 works, wherein, the channel parameter Value is bigger, and the quality for representing the down channel is better, and the smaller quality for representing the down channel of the channel parameter values is poorer.
Adjusting module 16, if being less than the preset threshold value for the channel quality parameter, utilizes the coefficient square Battle array F and the reference signal obtain the transmission signal and do not carry out back-off processing for the transmission signal.
It is further preferred that precoding processing module 11 includes:
Channel information acquisition unit 111, the channel information matrix of the down channel for obtaining the transmission transmission signal H;
Matrix decomposition unit 112, for carrying out obtaining coefficient matrix F after LQ decomposition to the channel information matrix H and being Matrix number B;
Transmission signal generation unit 113, the transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
Power control module 12 includes:
Fallback value computing unit 121, the back-off value for calculating the transmission signal;
Quantization encoding unit 122, back-off grade is obtained for carrying out quantization encoding processing to the back-off value, The back-off grade is used for the reduction amount for indicating the transmission power of the transmission signal.
Signaling sending module 15 includes:
Mapping table generation unit 151, reflects for modulus mark and the back-off grade to be carried out into combined coding Penetrate and obtain mapping table.
Implement embodiments of the invention, transmission signal generated by the precoding processing that non-modulus is carried out to reference signal, If detect that the power lifting dose rate of transmission signal exceedes preset power threshold, the transmission power to the transmission signal carries out work( Sent after the processing of rate rollback to receiving node, it is to avoid in the prior art, reference signal carries out precoding processing in sending node Transmission power increase, the deficiency of normal work is led to not more than the peak power of sending node afterwards.
It is that a kind of another structure of reference signal nonlinear precoding processing unit of the embodiment of the present invention is shown referring to Fig. 8 It is intended to, the processing unit 1 includes the place in processor 61, memory 62, input unit 63 and output device 64, processing unit 1 The quantity for managing device 61 can be one or more, and Fig. 8 is by taking a processor as an example.In some embodiments of the present invention, processor 61st, memory 62, input unit 63 and output device 64 can be connected by bus or other modes, be connected as in Fig. 8 with bus Example.
Wherein, batch processing code is stored in memory 62, and processor 61 is used to call the journey stored in memory 62 Sequence code, for performing following operation:
Transmission signal is generated after reference signal is carried out into precoding processing, wherein, for the reference signal without asking Mould processing;
Calculate transmitting of the transmission power relative to the reference signal for not carrying out precoding processing of the transmission signal The power Uplifting amount of power;
If the power Uplifting amount exceedes preset power threshold, by the carry out back-off processing of the transmission signal;
Transmission power after being handled according to rollback sends the transmission signal to receiving node.
It is preferred that, in some embodiments of the invention, processor 61 is used to perform described reference signal to be prelisted The step of generating transmission signal after code processing includes:
Obtain the channel information matrix H of the down channel of the transmission transmission signal;
Coefficient matrix F and coefficient matrix B are obtained after carrying out LQ decomposition to the channel information matrix H;
The transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
It is preferred that, in some embodiments of the invention, processor 61 is used to perform the hair by the transmission signal Penetrating the step of power carries out back-off processing includes:
Calculate the back-off value of the transmission signal;
Quantization encoding processing is carried out to the back-off value and obtains back-off grade, the back-off grade is used for Indicate the reduction amount of the transmission power of the transmission signal.
It is preferred that, in some embodiments of the invention, processor 61 is additionally operable to perform being used for for identifying including modulus The description information for describing the reference signal and data-signal is sent by way of signaling to the receiving node, wherein, institute Modulus is stated to identify for indicating whether to be directed to the reference signal while the data-signal sent carries out modulus processing.
It is preferred that, in some embodiments of the invention, processor 61 is used to perform the description information also including described Back-off grade, it is described to pass through the description information for being used to describe the reference signal and data-signal identified including modulus The step of mode of signaling is sent to the receiving node includes:
Modulus mark and the back-off grade are subjected to combined coding mapping and obtain mapping table.
It is preferred that, in some embodiments of the invention, processor 61 is additionally operable to perform detection and transmits the transmission signal Down channel channel quality parameter, wherein, the channel parameter values are bigger, and the quality for representing the down channel is better, described The smaller quality for representing the down channel of channel parameter values is poorer;
If the channel quality parameter is more than preset threshold value, perform when the transmission power of the transmission signal exceedes During preset power threshold, the step of transmission power of the transmission signal is subjected to back-off processing.
It is preferred that, in some embodiments of the invention, if processor 61 is additionally operable to execution, the channel quality parameter is small In the preset threshold value, the transmission signal is obtained using the coefficient matrix F and the reference signal and not for being somebody's turn to do Transmission signal carries out back-off processing.
Implement embodiments of the invention, transmission signal generated by the precoding processing that non-modulus is carried out to reference signal, If detect that the power lifting dose rate of transmission signal exceedes preset power threshold, the transmission power to the transmission signal carries out work( Sent after the processing of rate rollback to receiving node, it is to avoid in the prior art, reference signal carries out precoding processing in sending node Transmission power increase, the deficiency of normal work is led to not more than the peak power of sending node afterwards.
It is a kind of schematic flow sheet of the channel equalization method of reference signal of the embodiment of the present invention, this method referring to Fig. 9 Including:
Step 301, receiving node receive transmission signal and description information that sending node is sent by down channel, its In, the description information includes the power time for being used to represent that the sending node carries out the transmission signal back-off processing Move back grade.
Specifically, receiving node is sent to sending node includes the description information and transmission signal of back-off grade, it is right Transmit description information in down channel to be demodulated, obtain back-off grade, receiving node according to power back-off factors and The quantization table lookup of back-off grade obtains corresponding power back-off factors β.It is preferred that, modulus is also included in description information Mark, for indicating modulus processing whether was carried out to reference signal in sending node.
The reference signal that step 302, basis are recovered from the transmission signal, and obtain the reference of the down channel Signaling channel information.
Specifically, receiving node recovers reference signal from the transmission signal received, and entered using the reference signal Row channel estimation, obtains reference signal channel information
Step 303, according to the back-off grade and the reference signal channel information, to being passed in the down channel Defeated data-signal carries out channel equalization.
Specifically, because reference signal and data-signal have a difference power β when transmitting, it is necessary to will be with reference to letter The signal amplitude value alignment of number channel information and data-signal carries out multi-antenna channel equilibrium treatment again.A kind of method is for ginseng Examine signaling channel information and remove power back-off factors β, obtain corresponding data signal channel information on data-signalMulti-antenna channel equilibrium treatment is carried out to data-signal with the data signal channel information after processing.Separately A kind of method is to be multiplied by the β factors to receiving data-signal, then using the channel estimation value in reference signalData-signal is carried out Multi-antenna channel equilibrium treatment.
Implement embodiments of the invention, reference signal and back-off that receiving node is launched by node sending node etc. Level, calculates the reference signal channel information obtained on down channel, utilizes the reference signal channel information and back-off grade Attain the Way accurate data signal channel information, so that receiving node can be demodulated correctly to data-signal.Avoid existing Inaccurate deficiency is estimated to the channel information of down channel in technology.
It is that a kind of structure of channel equalization means based on reference signal of the embodiment of the present invention is shown referring to Figure 10-Figure 12 It is intended to, hereinafter referred to as balancer 2, the balancer 2 includes:
Transmission signal receiving module 21, for receiving transmission signal and the description that sending node is sent by down channel Information, wherein, the description information includes being used to represent that the sending node carries out back-off processing to the transmission signal Back-off grade.
Channel information computing module 22, the reference signal recovered for basis from the transmission signal, and obtain institute State the reference signal channel information of down channel;
Channel equalization module 23, for according to the back-off grade and the reference signal channel information, to described The data-signal transmitted in down channel carries out channel equalization.
It is preferred that, channel equalization module 23 includes:
First acquisition unit 231, for according to corresponding power in the preset mapping table of the back-off ranked queries Back-off factor;
First computing unit 232, for the reference signal channel information to be gone divided by the power back-off factors, is obtained Data signal channel information;
First balanced unit 233, it is equal for carrying out channel to the data-signal using the data signal channel information Weighing apparatus processing.
Channel equalization module 23 includes:
Second acquisition unit 234, for according to corresponding power in the preset mapping table of the back-off ranked queries Back-off factor;
Second computing unit 235, is multiplied by the power to the data-signal received for the receiving node and returns Move back the factor;
Second balanced unit 236, for being multiplied by using the reference signal channel information to described after power back-off factors Data-signal carry out channel equalization.
Implement embodiments of the invention, reference signal and back-off that receiving node is launched by node sending node etc. Level, calculates the reference signal channel information obtained on down channel, utilizes the reference signal channel information and back-off grade Attain the Way accurate data signal channel information, so that receiving node can be demodulated correctly to data-signal.Avoid existing Inaccurate deficiency is estimated to the channel information of down channel in technology.
Referring to Figure 13, for the embodiment of the present invention a kind of channel equalization means based on reference signal another structural representation Figure, the balancer 2 includes the processing in processor 71, memory 72, input unit 73 and output device 74, balancer 1 The quantity of device 71 can be one or more, and Figure 13 is by taking a processor as an example.In some embodiments of the present invention, processor 71st, memory 72, input unit 73 and output device 74 can be connected by bus or other modes, be connected as in Figure 13 with bus Example.
Wherein, batch processing code is stored in memory 72, and processor 71 is used to call the journey stored in memory 72 Sequence code, for performing following operation:
Transmission signal and description information that sending node is sent are received by down channel, wherein, the description information Including for representing that the sending node carries out the back-off grade of back-off processing to the transmission signal.
According to the reference signal recovered from the transmission signal, and obtain the reference signal channel of the down channel Information;
According to the back-off grade and the reference signal channel information, to the data transmitted in the down channel Signal carries out channel equalization.
It is preferred that, in some embodiments of the invention, processor 71 is described according to described back-off etc. for performing Level and the reference signal channel information, channel equalization step bag is carried out to the data-signal transmitted in the down channel Include:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The reference signal channel information is gone divided by the power back-off factors, data signal channel information is obtained;
Channel equalization is carried out to the data-signal using the data signal channel information.
It is preferred that, in some embodiments of the invention, processor 71 is described according to described back-off etc. for performing Level and the reference signal channel information, the step of channel equalization is carried out to the data-signal transmitted in the down channel Including:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The receiving node is multiplied by the power back-off factors to the data-signal received;
Channel is carried out to the data-signal being multiplied by after power back-off factors using the reference signal channel information equal Weighing apparatus processing.
Implement embodiments of the invention, reference signal and back-off that receiving node is launched by node sending node etc. Level, calculates the reference signal channel information obtained on down channel, utilizes the reference signal channel information and back-off grade Attain the Way accurate data signal channel information, so that receiving node can be demodulated correctly to data-signal.Avoid existing Inaccurate deficiency is estimated to the channel information of down channel in technology.
It is a kind of structural representation of reference signal nonlinear precoding processing system of the embodiment of the present invention referring to Figure 14 Figure, hereinafter referred to as processing system 3, the processing system 3 include any of above-mentioned processing unit 1 and balancer 2, work Process is that processing unit 1 generates transmission signal after reference signal is carried out into precoding processing, wherein, for the reference signal Handled without modulus;When the power Uplifting amount of the transmission power of the transmission signal exceedes preset power threshold, by institute The transmission power for stating transmission signal carries out back-off processing;Transmission power after being handled according to rollback sends out the transmission signal Balancer 2 is delivered to, balancer 2 receives transmission signal and description information that sending node is sent by down channel, its In, the description information includes the power time for being used to represent that the sending node carries out the transmission signal back-off processing Move back grade.According to the reference signal recovered from the transmission signal, and obtain the reference signal channel of the down channel Information;According to the back-off grade and the reference signal channel information, the data transmitted in the down channel are believed Number carry out channel equalization.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic Dish, CD, read-only memory(Read-Only Memory, ROM)Or random access memory(Random Access Memory, RAM)Deng.
Above disclosed is only a kind of preferred embodiment of the invention, can not limit the power of the present invention with this certainly Sharp scope, one of ordinary skill in the art will appreciate that all or part of flow of above-described embodiment is realized, and according to present invention power Profit requires made equivalent variations, still falls within and invents covered scope.

Claims (23)

1. a kind of reference signal nonlinear pre-coding processing method, it is characterised in that including:
Will reference signal carry out precoding processing after generate transmission signal, wherein, for the reference signal without modulus at Reason;
Calculate transmission power of the transmission power relative to the reference signal for not carrying out precoding processing of the transmission signal Power Uplifting amount;
If the power Uplifting amount exceedes preset power threshold, the transmission signal is subjected to back-off processing;
Transmission power after being handled according to rollback sends the transmission signal to receiving node.
2. processing method as claimed in claim 1, it is characterised in that described to carry out reference signal to generate after precoding processing The step of transmission signal, includes:
Obtain the channel information matrix H of the down channel of the transmission transmission signal;
The orthogonal LQ decomposition of lower triangle is carried out to the channel information matrix H and obtains coefficient matrix F and coefficient matrix B;
The transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
3. processing method as claimed in claim 2, it is characterised in that the transmission power by the transmission signal carries out work( The step of rate rollback processing, includes:
Calculate the back-off value of the transmission signal;
Quantization encoding processing is carried out to the back-off value and obtains back-off grade, the back-off grade is used to indicate The reduction amount of the transmission power of the transmission signal.
4. processing method as claimed in claim 3, it is characterised in that also include:
The description information for being used to describe the reference signal and data-signal identified including modulus is sent out by way of signaling The receiving node is delivered to, wherein, the modulus is identified for indicating whether to be directed to the reference signal while the number sent It is believed that number progress modulus processing.
5. processing method as claimed in claim 4, it is characterised in that the description information also includes described back-off etc. Level, it is described by the description information for being used to describe the reference signal and data-signal identified including modulus by way of signaling The step of sending to the receiving node includes:
Modulus mark and the back-off grade are subjected to combined coding mapping and obtain mapping table.
6. processing method as claimed in claim 5, it is characterised in that if the power Uplifting amount exceedes preset power Threshold value, before the step of the carry out back-off processing of the transmission signal, in addition to:
The channel quality parameter of the down channel of the detection transmission transmission signal, wherein, the channel parameter values are bigger to be represented The quality of the down channel is better, and the smaller quality for representing the down channel of the channel parameter values is poorer;
If the channel quality parameter is more than preset threshold value, the transmission power when the transmission signal is performed more than preset Power threshold when, the step of transmission power of the transmission signal is subjected to back-off processing.
7. the processing method as described in claim any one of 2-6, it is characterised in that also include:
If channel quality parameter is less than the preset threshold value, institute is obtained using the coefficient matrix F and the reference signal State transmission signal and do not carry out back-off processing for the transmission signal.
8. a kind of channel equalization method based on reference signal, it is characterised in that including:
Transmission signal and description information that sending node is sent are received by down channel, wherein, the description information includes For representing that the sending node carries out the back-off grade of back-off processing to the transmission signal;
According to the reference signal recovered from the transmission signal, and obtain the reference signal channel letter of the down channel Breath;
According to the back-off grade and the reference signal channel information, to the data-signal transmitted in the down channel Carry out channel equalization.
9. equalization methods as claimed in claim 8, it is characterised in that described according to the back-off grade and the reference Signaling channel information, carrying out channel equalization step to the data-signal transmitted in the down channel includes:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The reference signal channel information is gone divided by the power back-off factors, data signal channel information is obtained;
Channel equalization is carried out to the data-signal using the data signal channel information.
10. equalization methods as claimed in claim 9, it is characterised in that described according to the back-off grade and the ginseng Signaling channel information is examined, the step of carrying out channel equalization to the data-signal transmitted in the down channel includes:
According to corresponding power back-off factors in the preset mapping table of the back-off ranked queries;
The receiving node is multiplied by the power back-off factors to the data-signal received;
The data-signal being multiplied by after power back-off factors is carried out at channel equalization using the reference signal channel information Reason.
11. the equalization methods as described in claim any one of 8-10, it is characterised in that the description information also includes being used for table Show that the data-signal for whether being directed to the sending node carries out the modulus mark of modulus processing.
12. a kind of reference signal nonlinear precoding processing unit, it is characterised in that including:
Precoding processing module, for generating transmission signal after reference signal is carried out into precoding processing, wherein, for the ginseng Signal is examined to handle without modulus;
Computing module, for calculating the transmission power of the transmission signal relative to the reference letter for not carrying out precoding processing Number transmission power power Uplifting amount;
Power control module, if exceeding preset power threshold for the power Uplifting amount, by the progress of the transmission signal Back-off processing;
Signal emission module, the transmission power after being handled according to rollback sends the transmission signal to receiving node.
13. processing unit as claimed in claim 12, it is characterised in that the precoding processing module includes:
Channel information acquisition unit, the channel information matrix H of the down channel for obtaining the transmission transmission signal;
Matrix decomposition unit, for the channel information matrix H is carried out obtain after the orthogonal LQ of lower triangle is decomposed coefficient matrix F and Coefficient matrix B;
Transmission signal generation unit, the transmission signal is generated according to the coefficient matrix F and coefficient matrix B.
14. processing unit as claimed in claim 13, it is characterised in that the power control module includes:
Fallback value computing unit, the back-off value for calculating the transmission signal;
Quantization encoding unit, back-off grade, the work(are obtained for carrying out quantization encoding processing to the back-off value Rate back-off level is used for the reduction amount for indicating the transmission power of the transmission signal.
15. processing unit as claimed in claim 14, it is characterised in that also include:
Signaling sending module, for by including modulus identify be used for the reference signal and the description information of data-signal are described Sent by way of signaling to the receiving node, wherein, the modulus is identified for indicating whether to be directed to and the reference The data-signal that signal is sent simultaneously carries out modulus processing.
16. processing unit as claimed in claim 15, it is characterised in that the description information also includes described back-off etc. Level, the signaling sending module includes:
Mapping table generation unit, is reflected for modulus mark and the back-off grade to be carried out into combined coding Firing table.
17. processing unit as claimed in claim 16, it is characterised in that also include:
Channel quality detection module, the channel quality parameter of the down channel for detecting the transmission transmission signal, if described Channel quality parameter is more than preset threshold value, it indicates that the power control module work, wherein, the channel parameter values are got over Represent that the quality of the down channel is better greatly, the smaller quality for representing the down channel of the channel parameter values is poorer.
18. the processing unit as described in claim any one of 13-17, it is characterised in that also include:
Adjusting module, if being less than the preset threshold value for channel quality parameter, utilizes the coefficient matrix F and the ginseng Signal is examined to obtain the transmission signal and do not carry out back-off processing for the transmission signal.
19. a kind of channel equalization means based on reference signal, it is characterised in that including:
Transmission signal receiving module, for receiving transmission signal and description information that sending node is sent by down channel, Wherein, the description information includes the power for being used to represent that the sending node carries out the transmission signal back-off processing Back-off level;
Channel information computing module, the reference signal recovered for basis from the transmission signal, and obtain described descending The reference signal channel information of channel;
Channel equalization module, for according to the back-off grade and the reference signal channel information, to the descending letter The data-signal transmitted in road carries out channel equalization.
20. balancer as claimed in claim 19, it is characterised in that the channel equalization module includes:
First acquisition unit, for according to corresponding back-off in the preset mapping table of the back-off ranked queries because Son;
First computing unit, for the reference signal channel information to be gone divided by the power back-off factors, obtains data letter Number channel information;
First balanced unit, for carrying out channel equalization to the data-signal using the data signal channel information.
21. balancer as claimed in claim 19, it is characterised in that the channel equalization module includes:
Second acquisition unit, for according to corresponding back-off in the preset mapping table of the back-off ranked queries because Son;
Second computing unit, the power back-off factors are multiplied by for the receiving node to the data-signal received;
Second balanced unit, for being believed using the reference signal channel information the data being multiplied by after power back-off factors Number carry out channel equalization.
22. the balancer as described in any one of claim 19 to 21, it is characterised in that the description information also includes representing Whether modulus mark that the data-signal that with the reference signal simultaneously sends carry out modulus processing is directed to.
23. a kind of reference signal nonlinear precoding processing system, it is characterised in that including:
Processing unit as described in claim any one of 12-18;And/or the equilibrium as described in claim any one of 19-22 Device.
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