CN104113500A - Channel equalization method, pre-coding processing method, related devices and system - Google Patents
Channel equalization method, pre-coding processing method, related devices and system Download PDFInfo
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Abstract
The embodiment of the invention discloses a reference signal nonlinear pre-coding processing method. The method includes the following steps that: pre-coding processing is performed on reference signals, so that transmitting signals can be generated, and modulo processing is not performed on the reference signals; when the transmitting power of the transmitting signals exceeds a preset power threshold value, power back-off processing is performed on the transmitting power of the transmitting signals; and the transmitting signals are transmitted to a receiving node according to the transmitting power which has been subjected to the power back-off processing. The embodiment of the invention also discloses a reference signal-based channel equalization method, related devices and a system. With the channel equalization method, the pre-coding processing method, the related devices and the system of the invention adopted, the transmitting power of the reference signals at a transmitting node end can be effectively decreased.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of reference signal nonlinear precoding method, channel equalization method, relevant apparatus and system.
Background technology
At descending MU-MIMO(Multiple User-Multiple Input Multiple Output, multi-user's multiple-input and multiple-output, be called for short MU-MIMO) in communication system, transmitting node by the multi-access mode of spatial reuse, sends different data to multiple receiving nodes in identical time-frequency domain resources.In this case, transmitting node need to adopt correlation technique to separate the channel of each receiving node as far as possible, eliminates the phase mutual interference between each receiving node, thereby makes the total throughput maximum of system.Have in theory at present multiple MU-MIMO technical scheme, these methods can be divided into non-linear and linear predictive coding two classes generally.Nonlinear precoding method mainly contains the Coding based on DPC(Dirty Paper, and dirty paper code is called for short DPC), THP(Tomlinson-Harashima Precoding, THP precoding) and class methods of Vector Precoding.Linear pre-coding method mainly contains channel inversion algorithms and maximizes SLNR(signal-to leakage-noise ratio, signals leakiness noise ratio) criterion algorithm.
Nonlinear precoding method based on asking mould has solved sending node and has disturbed the power lifting problem of bringing of eliminating, but for the equivalent channel that accurately data estimator experiences, ensure the correct demodulation of receiving node, reference signal can not be asked modulo operation, cause the transmitting power of reference signal part still can increase, and the maximum power of transmitting node is generally fixed, can cause like this reduction of transmitted power utilization ratio.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of reference signal nonlinear precoding method, channel equalization method, relevant apparatus and system are provided.Can solve sending node reference signal transmitting power lifting problem in prior art.
In order to solve the problems of the technologies described above, first aspect present invention provides a kind of reference signal nonlinear precoding method, comprising:
Carry out generating and transmitting after precoding processing with reference to signal, wherein, do not ask mould processing for described reference signal;
The transmitting power transmitting described in calculating is with respect to the power lifting amount of the transmitting power of described reference signal;
If described power lifting amount exceedes preset power threshold, by described transmit carry out back-off processing;
Described in inciting somebody to action according to rollback transmitting power after treatment, transmit and be sent to receiving node.
In the possible implementation of the first, describedly carry out generating the step transmitting after precoding processing with reference to signal and comprise:
Obtain the channel information matrix H of the down channel transmitting described in transmission;
Described channel information matrix H is carried out after the orthogonal LQ of lower triangle decomposes obtaining coefficient matrix F and coefficient matrix B;
Described in described coefficient matrix F and coefficient matrix B generation, transmit.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second, the described step that the described transmitting power transmitting is carried out to back-off processing comprises:
The back-off value transmitting described in calculating;
Described back-off value is carried out to quantization encoding processing and obtain back-off grade, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
In conjunction with the possible implementation of the second of first aspect, in the third possible implementation, also comprise:
Ask the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, described descriptor also comprises described back-off grade, describedly asks comprising for describing the step that the descriptor of described reference signal and data-signal is sent to described receiving node by the mode of signaling of mould mark by comprising:
Described in inciting somebody to action, ask mould mark and described back-off grade to carry out combined coding mapping and obtain mapping table.
In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, if described power lifting amount exceedes preset power threshold, before the described step of carrying out back-off processing transmitting, also comprise:
The channel quality parameter of the down channel transmitting described in detected transmission, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer;
If described channel quality parameter is greater than preset threshold value, carry out in the time that the transmitting power of described transmitted signal exceedes preset power threshold the step that the described transmitting power transmitting is carried out to back-off processing.
,, in the 6th kind of possible implementation, also comprise to any in the 5th kind of possible implementation of first aspect in conjunction with first aspect:
If described channel quality parameter is less than described preset threshold value, utilizes described coefficient matrix F and described reference signal to transmit described in obtaining and do not transmit and carry out back-off processing for this.
Second aspect present invention provides a kind of channel equalization method based on reference signal, comprising:
Receive transmitting and descriptor of sending node transmission by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
According to the reference signal recovering, and obtain the reference signal channel information of described down channel from described transmitting;
According to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization.
In the possible implementation of the first, described according to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization step and comprise:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described reference signal channel information is removed with the described back-off factor, obtained data-signal channel information;
Use described data-signal channel information to carry out channel equalization to described data-signal.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second, described according to described back-off grade and described reference signal channel information, the step of the data-signal transmitting in described down channel being carried out to channel equalization comprises:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described receiving node is multiplied by the described back-off factor to the described data-signal receiving;
Adopt described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
In conjunction with second aspect to any in the possible implementation of the second of second aspect, in the third possible implementation, described descriptor also comprises for representing whether asking the mould of asking of mould processing to identify for the reference signal of described sending node.
Third aspect present invention provides a kind of reference signal nonlinear precoding processing unit, comprising:
Precoding processing module, generates and transmits after precoding processing for carrying out with reference to signal, wherein, does not ask mould processing for described reference signal;
Computing module, for the transmitting power that transmits described in calculating with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing;
Power control module, if exceed preset power threshold for described power lifting amount, by described transmit carry out back-off processing;
Signal emission module, transmits and is sent to receiving node described in inciting somebody to action according to rollback transmitting power after treatment.
In the possible implementation of the first, precoding processing module comprises:
Channel information acquisition unit, for obtaining the channel information matrix H of the down channel transmitting described in transmission;
Matrix decomposition unit, obtains coefficient matrix F and coefficient matrix B for described channel information matrix H being carried out after the orthogonal LQ of lower triangle decomposes;
The generation unit that transmits, transmits described in generating according to described coefficient matrix F and coefficient matrix B.
In conjunction with the possible implementation of the first of the third aspect, in the possible implementation of the second, described power control module comprises:
Rollback value computing unit, for the back-off value transmitting described in calculating;
Quantization encoding unit, obtains back-off grade for described back-off value is carried out to quantization encoding processing, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
In conjunction with the possible implementation of the second of the third aspect, in the third possible implementation, also comprise:
Signaling sending module, for asking the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
In conjunction with the third possible implementation of the third aspect, in the 4th kind of possible implementation, described descriptor also comprises described back-off grade, and described signaling sending module comprises:
Mapping table generation unit, obtains mapping table for asking mould mark and described back-off grade to carry out combined coding mapping described in general.
In conjunction with the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, also comprise:
Channel quality detection module, for detection of the channel quality parameter of the down channel transmitting described in transmission, if described channel quality parameter is greater than preset threshold value, indicate described power control module work, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer.
,, in the 6th kind of possible implementation, also comprise to any in the 5th kind of possible implementation of the third aspect in conjunction with the third aspect:
Adjusting module, if be less than described preset threshold value for described channel quality parameter, utilize described coefficient matrix F and described reference signal to transmit described in obtaining and does not transmit and carry out back-off processing for this.
Fourth aspect present invention provides a kind of channel equalization means based on reference signal, comprising:
The receiver module that transmits, for receive transmitting and descriptor that sending node sends by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
Channel information computing module, for according to from the described reference signal that transmits and recover, and obtains the reference signal channel information of described down channel;
Channel equalization module, for according to described back-off grade and described reference signal channel information, carries out channel equalization to the data-signal transmitting in described down channel.
In the possible implementation of the first, described channel equalization module comprises:
The first acquiring unit, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The first computing unit, for described reference signal channel information is removed with the described back-off factor, obtains data-signal channel information;
The first balanced unit, for using described data-signal channel information to carry out channel equalization to described data-signal.
In conjunction with fourth aspect, in the possible implementation of the second, described channel equalization module comprises:
Second acquisition unit, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The second computing unit, is multiplied by the described back-off factor for described receiving node to the described data-signal receiving;
The second balanced unit, for adopting described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
In conjunction with fourth aspect to any in the possible implementation of the second of fourth aspect, in the third possible implementation, described descriptor also comprises for representing whether asking the mould of asking of mould processing to identify for the reference signal of described sending node.
Fifth aspect present invention provides a kind of reference signal nonlinear precoding treatment system, comprising:
The third aspect is to any processing unit in the 6th kind of possible implementation of the third aspect; And/or
Fourth aspect is to any balancer in the third possible implementation of fourth aspect.
Implement the present invention, there is following beneficial effect:
Transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of a kind of reference signal nonlinear pre-coding processing method of the embodiment of the present invention;
Fig. 2 is another schematic flow sheet of a kind of reference signal nonlinear pre-coding processing method of the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention;
Fig. 4 is another structural representation of a kind 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 the another structural representation of a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention;
Fig. 9 is the schematic flow sheet of a kind of channel equalization method based on reference signal of the embodiment of the present invention;
Figure 10 is the structural representation of a kind 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 another structural representation of a kind of channel equalization means based on reference signal of the embodiment of the present invention;
Figure 14 is the structural representation of a kind of reference signal nonlinear precoding treatment 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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, be the schematic flow sheet of a kind of reference signal non-uniform encoding processing method of the embodiment of the present invention, the method comprises:
Step 101, carry out generating and transmitting after precoding processing with reference to signal, wherein, do not ask mould processing for described reference signal.
Concrete, reference signal (Reference Signal) is pilot signal, for channel quality is measured and channel estimating, detects and demodulation so that the data-signal that receiving node sends sending node is concerned with.Sending node first carries out generating and transmitting after precoding processing with reference to signal, then this is transmitted and is sent to receiving node, and in order to ensure that reference signal does not distort, sending node is not asked mould processing to reference signal.Can be DPC(Dirty Paper Coding to the method for reference signal precoding processing, dirty paper code, be called for short DPC) coding, also can adopt other coded systems, the present invention is not restricted, the present embodiment is taking THP precoding as example, to reference signal carry out after THP precoding processing transmit for
x
RS＝F·B
-1a
RS
Wherein a
rSfor reference signal, x
rSfor transmitting after precoding processing, sending node saves feedback by reception or obtains the channel information matrix H of down channel by methods such as channel reciprocities, and sending node carries out LQ decomposing H=SF to channel information matrix H
h, wherein, S ∈ C
k × Kfor lower-left triangle battle array, F ∈ C
n × Kit is matrix at the tenth of the twelve Earthly Branches.The result structural matrix that utilizes LQ to decompose
s
kkbe the diagonal entry of matrix S, and then structural matrix B=GS, obtain diagonal entry and be entirely 1 lower-left triangle battle array B, b
kifor the capable l column element of k of B.
Step 102, calculate described in the transmitting power that transmits with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing.
Concrete, ask the mould processing can restricting signal transmitting power to transmitting, in order to prevent that reference signal from distorting, after step 101 precoding processing, ask mould processing, the transmitting power now transmitting is improved compared with reference signal, calculates the transmitting power that transmits and the power lifting amount with respect to the transmitting power of reference signal.
If the described power lifting of step 103 amount exceedes preset power threshold, by described transmit carry out back-off processing.
Concrete, the transmitting power of sending node is fixed, if the power lifting amount that this transmits exceedes preset power threshold, it is the maximum of the system that reaches of the transmitting power of sending node, this transmitting power transmitting is carried out to back-off processing, the whole transmitting power transmitting is adjusted in normal power bracket.
Step 104, according to rollback transmitting power after treatment will described in transmit and be sent to receiving node.
Implement embodiments of the invention, transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Referring to Fig. 2, be another schematic flow sheet of a kind of reference signal nonlinear pre-coding processing method of the embodiment of the present invention, the method comprises:
Step 201, obtain the channel information matrix H of the down channel of transmitting signal, described channel information matrix H is carried out obtaining sytem matrix F and sytem matrix B after numerical value decomposition, generate and transmit according to coefficient matrix F, coefficient matrix B and reference signal.
Concrete, sending node saves feedback by reception or obtains the channel information matrix H of down channel by methods such as channel reciprocities, channel information matrix H is carried out to LQ(Lower triangular Quadrate, lower triangle is orthogonal) numerical value decompose after obtain coefficient matrix F and sytem matrix B matrix, LQ numerical value decompose method as follows:
H＝S·F
H
Wherein, matrix S is lower-left triangular matrix, and matrix F is matrix at the tenth of the twelve Earthly Branches, the result structural matrix that utilizes LQ numerical value to decompose
s
kkbe the diagonal entry of matrix S, and then structural matrix B=GS, obtain diagonal entry and be entirely 1 lower-left triangle battle array B.To reference signal carry out after DPC precoding processing transmit for
Wherein b
klfor the element of matrix B, a
rSfor reference signal, write as matrix form and be
And then be weighted and process the signal obtaining after THP precoding with F matrix
x
RS＝F·B
-1a
RS
X
rSfor transmitting after precoding processing.
Described in step 202, detected transmission, whether the channel quality parameter of the down channel of transmitted signal is greater than preset threshold value.
Concrete, the acquisition methods of the channel quality parameter of down channel can be that receiving node feedback or sending node obtain by channel reciprocity, channel quality parameter comprises SNR(Signal to Noise Ratio, signal to noise ratio, be called for short SNR) or CQI(Channel Quality Indicator, CQI, is called for short CQI), the quality of larger this down channel of expression of channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer.In the time detecting that channel quality parameter is greater than preset threshold value, execution step 203, otherwise, execution step 204.
Step 203, calculate described in the transmitting power that transmits with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing.
Step 204, utilize described sytem matrix F and described reference signal to transmit described in obtaining and do not transmit and carry out back-off processing for this.
Concrete, sending node utilizes and in reference signal, is multiplied by F coefficient matrix, and does not carry out DPC coding, obtains transmitting into x
rS=fa
rS.Because F coefficient matrix is unitary matrice, thus the transmitting power now transmitting equate with reference signal, therefore do not need to carry out back-off processing.
Step 205, judge whether described power lifting amount exceedes preset power threshold.
Concrete, sending node judges whether the power lifting amount transmitting exceedes preset power threshold, if be judged as YES, and execution step 206, otherwise, execution step 207.
Step 206, flow processing routinely.
The back-off value transmitting described in step 207, calculating; Described back-off value is carried out to quantization encoding processing and obtain back-off grade, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
Concrete, sending node calculates the back-off value γ transmitting,
Back-off value γ stepping is quantified as to different back-off factor-betas, for example back-off value is quantified as to 4 grades, can adopt following quantization method, taking back-off grade 1 as example, the back-off value that what the method representation of table 1 calculated transmit-4dB and-2dB between time,, by this interval be quantified as-4dB of value arbitrary value, back-off grade 1 is encoded to 10.Back-off factor-beta after quantizing in this example, the scope of back-off value γ is only example, in reality, can quantize according to best performance principle, choosing of β will ensure that the power lifting that successive interference cancellation in precoding is caused lowers, and ensures that transmitting power is no more than the transmitting power of not carrying out before precoding.The transmitting power transmitting is carried out to back-off processing, obtain the x that transmits after power adjustment
rS=β FB
-1a
rS.
| Coding | Back-off grade | Back-off factor-beta | 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, will comprise ask the descriptor for describing described reference signal of mould mark to be sent to receiving node by the mode of signaling.
Concrete, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously., as 0 in table 1 represents not ask mould, 1 represents to ask mould.Preferably, can by back-off grade with ask mould mark to carry out combined coding to become a mapping table, as shown in Figure 3 coding form, adopt 3 bits to represent, the 1st bit representation is asked modular representation, the 2nd and the 3rd bit representation back-off grade, the back-off factor in the corresponding table 1 of this back-off grade.Sending node asks the descriptor for describing described reference signal of mould mark to be sent to receiving node by the mode of signaling by comprising.
| Coding | Ask mould mark ModFlg |
| 0 | Do not ask mould |
| 1 | Ask mould |
Table 2
| Coding | Ask mould mark ModFlg | Back-off grade |
| 000 | Do not ask mould | 0 |
| 101 | Ask mould | 1 |
| 111 | Ask mould | 2 |
| 110 | Ask mould | 3 |
Table 3
Step 209, according to rollback transmitting power after treatment will described in transmit and be sent to receiving node.
Concrete, sending node is by the x that transmits after power adjustment
rS=β FB
-1a
rSbe sent to receiving node.
Implement embodiments of the invention, transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Referring to Fig. 3, be the structural representation of a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention, hereinafter to be referred as processing unit 1, this processing unit 1 comprises:
Precoding processing module 11, generates and transmits after precoding processing for carrying out with reference to signal, wherein, does not ask mould processing for described reference signal.
Concrete, precoding processing module 11 can be DPC(Dirty Paper Coding to the method for reference signal precoding processing, dirty paper code, be called for short DPC) coding, also can adopt other coded systems, the present invention is not restricted, and the present embodiment is encoded to example with DPC, precoding processing module 11 to reference signal carry out after DPC precoding processing transmit for
x
RS＝F·B
-1a
RS
Wherein a
rSfor reference signal, x
rSfor transmitting after precoding processing.Sending node saves feedback by reception or obtains the channel information matrix H of down channel by methods such as channel reciprocities, and sending node carries out obtaining coefficient matrix F and coefficient matrix B after numerical value decomposition to channel information matrix H, and coefficient matrix F is unitary matrice.
Computing module 12, for the transmitting power that transmits described in calculating with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing.
Power control module 13, if exceed preset power threshold for described power lifting amount, by described transmit carry out back-off processing.
Concrete, ask the mould processing can restricting signal transmitting power to transmitting, in order to prevent that reference signal from distorting, precoding processing module 11 is not asked mould processing to reference signal, the transmitting power now transmitting is improved compared with reference signal, the transmitting power of sending node is fixed, if detecting the power lifting amount transmitting, power control module 13 exceedes preset power threshold, it is the maximum that the transmitting power of sending node reaches system, this transmitting power transmitting is carried out to back-off processing, the whole transmitting power transmitting is adjusted in normal power bracket.
Signal emission module 14, transmits and is sent to receiving node described in inciting somebody to action according to rollback transmitting power after treatment.
Implement embodiments of the invention, transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Further, referring to Fig. 4-Fig. 7, for another structural representation of a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention, except precoding processing module 11, computing module 12, power control module 13 and signal emission module 14, also comprise:
Signaling sending module 15, for asking the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
Channel quality detection module 17, for detection of the channel quality parameter of the down channel transmitting described in transmission, if described channel quality parameter is greater than preset threshold value, indicated horsepower control module 12 is worked, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer.
Adjusting module 16, if be less than described preset threshold value for described channel quality parameter, utilize described coefficient matrix F and described reference signal to transmit described in obtaining and does not transmit and carry out back-off processing for this.
Further preferred, precoding processing module 11 comprises:
Channel information acquisition unit 111, for obtaining the channel information matrix H of the down channel transmitting described in transmission;
Matrix decomposition unit 112, obtains coefficient matrix F and coefficient matrix B for described channel information matrix H is carried out after LQ decomposition;
The generation unit 113 that transmits, transmits described in generating according to described coefficient matrix F and coefficient matrix B.
Power control module 12 comprises:
Rollback value computing unit 121, for the back-off value transmitting described in calculating;
Quantization encoding unit 122, obtains back-off grade for described back-off value is carried out to quantization encoding processing, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
Signaling sending module 15 comprises:
Mapping table generation unit 151, obtains mapping table for asking mould mark and described back-off grade to carry out combined coding mapping described in general.
Implement embodiments of the invention, transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Referring to Fig. 8, for the another structural representation of a kind of reference signal nonlinear precoding processing unit of the embodiment of the present invention, this processing unit 1 comprises processor 61, memory 62, input unit 63 and output device 64, the quantity of the processor 61 in processing unit 1 can be one or more, and Fig. 8 is taking a processor as example.In some embodiments of the present invention, processor 61, memory 62, input unit 63 and output device 64 can be connected by bus or other modes, in Fig. 8, are connected to example with bus.
Wherein, in memory 62, store batch processing code, and processor 61 is for calling the program code of memory 62 storages, for carrying out following operation:
Carry out generating and transmitting after precoding processing with reference to signal, wherein, do not ask mould processing for described reference signal;
The transmitting power transmitting described in calculating is with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing;
If described power lifting amount exceedes preset power threshold, by described transmit carry out back-off processing;
Described in inciting somebody to action according to rollback transmitting power after treatment, transmit and be sent to receiving node.
Preferably, in some embodiments of the invention, processor 61 described carry out generating the step transmitting after precoding processing with reference to signal and comprises for carrying out:
Obtain the channel information matrix H of the down channel transmitting described in transmission;
Described channel information matrix H is carried out obtaining coefficient matrix F and coefficient matrix B after LQ decomposition;
Described in described coefficient matrix F and coefficient matrix B generation, transmit.
Preferably, in some embodiments of the invention, processor 61 comprises for carrying out the described step that the described transmitting power transmitting is carried out to back-off processing:
The back-off value transmitting described in calculating;
Described back-off value is carried out to quantization encoding processing and obtain back-off grade, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
Preferably, in some embodiments of the invention, processor 61 also asks the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling for carrying out by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
Preferably, in some embodiments of the invention, processor 61 also comprises described back-off grade for carrying out described descriptor, describedly asks comprising for describing the step that the descriptor of described reference signal and data-signal is sent to described receiving node by the mode of signaling of mould mark by comprising:
Described in inciting somebody to action, ask mould mark and described back-off grade to carry out combined coding mapping and obtain mapping table.
Preferably, in some embodiments of the invention, processor 61 is also for carrying out the channel quality parameter of the down channel transmitting described in detected transmission, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer;
If described channel quality parameter is greater than preset threshold value, carry out in the time that the transmitting power of described transmitted signal exceedes preset power threshold the step that the described transmitting power transmitting is carried out to back-off processing.
Preferably, in some embodiments of the invention, if processor 61 is also less than described preset threshold value for carrying out described channel quality parameter, utilizes described coefficient matrix F and described reference signal to transmit described in obtaining and do not transmit and carry out back-off processing for this.
Implement embodiments of the invention, transmit by reference signal being carried out to the non-precoding processing generation of asking mould, if when the power lifting dose rate that detection transmits exceedes preset power threshold, this transmitting power transmitting is carried out being sent to receiving node after back-off processing, avoid in prior art, reference signal transmitting power after sending node carries out precoding processing increases, and exceedes the maximum power of sending node and causes the deficiency that cannot normally work.
Referring to Fig. 9, be the schematic flow sheet of the channel equalization method of a kind of reference signal of the embodiment of the present invention, the method comprises:
Step 301, receiving node receive transmitting and descriptor of sending node transmission by down channel, and wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
Concrete, receiving node sends and comprises the descriptor of back-off grade and transmit sending node, to transmitting the demodulation of carrying out of descriptor in down channel, obtain back-off grade, receiving node obtains corresponding back-off factor-beta according to the quantification table lookup of the back-off factor and back-off grade.Preferably, in descriptor, also comprise and ask mould mark, be used to indicate at sending node whether reference signal was carried out asking mould processing.
Step 302, according to the reference signal that recovers from described transmitting, and obtain the reference signal channel information of described down channel.
Concrete, receiving node from receive transmit recover reference signal, and utilize this reference signal to carry out channel estimating, obtain reference signal channel information
Step 303, according to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization.
Concrete, because reference signal and data-signal exist a difference power β in transmitting, need to carry out again multi-antenna channel equilibrium treatment with reference to the signal amplitude value alignment of signaling channel information and data-signal.One method is to remove back-off factor-beta for reference signal channel information, obtains data-signal channel information corresponding on data-signal
data-signal is carried out to multi-antenna channel equilibrium treatment with data-signal channel information after treatment.Another kind method is to be multiplied by the β factor to receiving data-signal, then adopts the channel estimation value in reference signal
data-signal carries out multi-antenna channel equilibrium treatment.
Implement embodiments of the invention, the reference signal that receiving node is launched by node sending node and back-off grade, calculate the reference signal channel information on down channel, receiving node utilizes this reference signal channel information and the back-off grade data-signal channel information accurately of attaining the Way, so that can carry out correct demodulation to data-signal.Avoid, in prior art, the channel information of down channel is estimated to inaccurate deficiency.
Referring to Figure 10-Figure 12, be the structural representation of a kind of channel equalization means based on reference signal of the embodiment of the present invention, hereinafter to be referred as balancer 2, this balancer 2 comprises:
Receiver module 21 transmits, for receive transmitting and descriptor of sending node transmission by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
Channel information computing module 22, for according to from the described reference signal that transmits and recover, and obtains the reference signal channel information of described down channel;
Channel equalization module 23, for according to described back-off grade and described reference signal channel information, carries out channel equalization to the data-signal transmitting in described down channel.
Preferably, channel equalization module 23 comprises:
The first acquiring unit 231, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The first computing unit 232, for described reference signal channel information is removed with the described back-off factor, obtains data-signal channel information;
The first balanced unit 233, for using described data-signal channel information to carry out channel equalization to described data-signal.
Channel equalization module 23 comprises:
Second acquisition unit 234, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The second computing unit 235, is multiplied by the described back-off factor for described receiving node to the described data-signal receiving;
The second balanced unit 236, for adopting described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
Implement embodiments of the invention, the reference signal that receiving node is launched by node sending node and back-off grade, calculate the reference signal channel information on down channel, receiving node utilizes this reference signal channel information and the back-off grade data-signal channel information accurately of attaining the Way, so that can carry out correct demodulation to data-signal.Avoid, in prior art, the channel information of down channel is estimated to inaccurate deficiency.
Referring to Figure 13, be another structural representation of a kind of channel equalization means based on reference signal of the embodiment of the present invention, this balancer 2 comprises processor 71, memory 72, input unit 73 and output device 74, the quantity of the processor 71 in balancer 1 can be one or more, and Figure 13 is taking a processor as example.In some embodiments of the present invention, processor 71, memory 72, input unit 73 and output device 74 can be connected by bus or other modes, in Figure 13, are connected to example with bus.
Wherein, in memory 72, store batch processing code, and processor 71 is for calling the program code of memory 72 storages, for carrying out following operation:
Receive transmitting and descriptor of sending node transmission by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
According to the reference signal recovering, and obtain the reference signal channel information of described down channel from described transmitting;
According to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization.
Preferably, in some embodiments of the invention, processor 71 is described according to described back-off grade and described reference signal channel information for carrying out, and the data-signal transmitting is carried out to channel equalization step comprise in described down channel:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described reference signal channel information is removed with the described back-off factor, obtained data-signal channel information;
Use described data-signal channel information to carry out channel equalization to described data-signal.
Preferably, in some embodiments of the invention, processor 71 is described according to described back-off grade and described reference signal channel information for carrying out, and the step of the data-signal transmitting in described down channel being carried out to channel equalization comprises:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described receiving node is multiplied by the described back-off factor to the described data-signal receiving;
Adopt described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
Implement embodiments of the invention, the reference signal that receiving node is launched by node sending node and back-off grade, calculate the reference signal channel information on down channel, receiving node utilizes this reference signal channel information and the back-off grade data-signal channel information accurately of attaining the Way, so that can carry out correct demodulation to data-signal.Avoid, in prior art, the channel information of down channel is estimated to inaccurate deficiency.
Referring to Figure 14, for the structural representation of a kind of reference signal nonlinear precoding treatment system of the embodiment of the present invention, hereinafter to be referred as treatment system 3, this treatment system 3 comprises any in above-mentioned processing unit 1 and balancer 2, the course of work is, processing unit 1 carries out generating and transmitting after precoding processing with reference to signal, wherein, does not ask mould processing for described reference signal; In the time that the power lifting amount of the transmitting power of described transmitted signal exceedes preset power threshold, the described transmitting power transmitting is carried out to back-off processing; Described in inciting somebody to action according to rollback transmitting power after treatment, transmit and be sent to balancer 2, balancer 2 receives transmitting and descriptor of sending node transmission by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.According to the reference signal recovering, and obtain the reference signal channel information of described down channel from described transmitting; According to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.
Claims (23)
1. a reference signal nonlinear pre-coding processing method, is characterized in that, comprising:
Carry out generating and transmitting after precoding processing with reference to signal, wherein, do not ask mould processing for described reference signal;
The transmitting power transmitting described in calculating is with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing;
If described power lifting amount exceedes preset power threshold, described in inciting somebody to action, transmit and carry out back-off processing;
Described in inciting somebody to action according to rollback transmitting power after treatment, transmit and be sent to receiving node.
2. processing method as claimed in claim 1, is characterized in that, describedly carries out generating the step transmitting after precoding processing with reference to signal and comprises:
Obtain the channel information matrix H of the down channel transmitting described in transmission;
Described channel information matrix H is carried out to the orthogonal LQ decomposition of lower triangle and obtain coefficient matrix F and coefficient matrix B;
Described in described coefficient matrix F and coefficient matrix B generation, transmit.
3. processing method as claimed in claim 2, is characterized in that, the described step that the described transmitting power transmitting is carried out to back-off processing comprises:
The back-off value transmitting described in calculating;
Described back-off value is carried out to quantization encoding processing and obtain back-off grade, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
4. processing method as claimed in claim 3, is characterized in that, also comprises:
Ask the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
5. processing method as claimed in claim 4, it is characterized in that, described descriptor also comprises described back-off grade, describedly asks comprising for describing the step that the descriptor of described reference signal and data-signal is sent to described receiving node by the mode of signaling of mould mark by comprising:
Described in inciting somebody to action, ask mould mark and described back-off grade to carry out combined coding mapping and obtain mapping table.
6. processing method as claimed in claim 5, is characterized in that, if described power lifting amount exceedes preset power threshold, before the described step of carrying out back-off processing transmitting, also comprises:
The channel quality parameter of the down channel transmitting described in detected transmission, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer;
If described channel quality parameter is greater than preset threshold value, carry out in the time that the transmitting power of described transmitted signal exceedes preset power threshold the step that the described transmitting power transmitting is carried out to back-off processing.
7. the processing method as described in claim 1-6 any one, is characterized in that, also comprises:
If described channel quality parameter is less than described preset threshold value, utilizes described coefficient matrix F and described reference signal to transmit described in obtaining and do not transmit and carry out back-off processing for this.
8. the channel equalization method based on reference signal, is characterized in that, comprising:
Receive transmitting and descriptor of sending node transmission by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
According to the reference signal recovering, and obtain the reference signal channel information of described down channel from described transmitting;
According to described back-off grade and described reference signal channel information, the data-signal transmitting in described down channel is carried out to channel equalization.
9. equalization methods as claimed in claim 8, is characterized in that, described according to described back-off grade and described reference signal channel information, the data-signal transmitting is carried out to channel equalization step comprise in described down channel:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described reference signal channel information is removed with the described back-off factor, obtained data-signal channel information;
Use described data-signal channel information to carry out channel equalization to described data-signal.
10. equalization methods as claimed in claim 9, is characterized in that, described according to described back-off grade and described reference signal channel information, the step of the data-signal transmitting in described down channel being carried out to channel equalization comprises:
Inquire about the back-off factor corresponding in preset mapping table according to described back-off grade;
Described receiving node is multiplied by the described back-off factor to the described data-signal receiving;
Adopt described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
11. equalization methods as described in claim 8-10 any one, is characterized in that, described descriptor also comprises asks mould mark for what whether represent to ask mould processing for the data-signal of described sending node.
12. 1 kinds of reference signal nonlinear precoding processing unit, is characterized in that, comprising:
Precoding processing module, generates and transmits after precoding processing for carrying out with reference to signal, wherein, does not ask mould processing for described reference signal;
Computing module, for the transmitting power that transmits described in calculating with respect to the power lifting amount of transmitting power of described reference signal of not carrying out precoding processing;
Power control module, if exceed preset power threshold for described power lifting amount, by described transmit carry out back-off processing;
Signal emission module, transmits and is sent to receiving node described in inciting somebody to action according to rollback transmitting power after treatment.
13. processing unit as claimed in claim 12, is characterized in that, described precoding processing module comprises:
Channel information acquisition unit, for obtaining the channel information matrix H of the down channel transmitting described in transmission;
Matrix decomposition unit, obtains coefficient matrix F and coefficient matrix B for described channel information matrix H being carried out after the orthogonal LQ of lower triangle decomposes;
The generation unit that transmits, transmits described in generating according to described coefficient matrix F and coefficient matrix B.
14. processing unit as claimed in claim 13, is characterized in that, described power control module comprises:
Rollback value computing unit, for the back-off value transmitting described in calculating;
Quantization encoding unit, obtains back-off grade for described back-off value is carried out to quantization encoding processing, the decrease of the transmitting power transmitting described in described back-off grade is used to indicate.
15. processing unit as described in right 14, is characterized in that, also comprise:
Signaling sending module, for asking the descriptor for describing described reference signal and data-signal of mould mark to be sent to described receiving node by the mode of signaling by comprising, wherein, described in, ask mould mark to ask mould processing for whether representing for the data-signal sending with described reference signal simultaneously.
16. processing unit as claimed in claim 15, is characterized in that, described descriptor also comprises described back-off grade, and described signaling sending module comprises:
Mapping table generation unit, obtains mapping table for asking mould mark and described back-off grade to carry out combined coding mapping described in general.
17. processing unit as claimed in claim 16, is characterized in that, also comprise:
Channel quality detection module, for detection of the channel quality parameter of the down channel transmitting described in transmission, if described channel quality parameter is greater than preset threshold value, indicate described power control module work, wherein, the quality of larger this down channel of expression of described channel parameter values is better, and the quality of less this down channel of expression of described channel parameter values is poorer.
18. processing unit as described in claim 12-17 any one, is characterized in that, also comprise:
Adjusting module, if be less than described preset threshold value for described channel quality parameter, utilize described coefficient matrix F and described reference signal to transmit described in obtaining and does not transmit and carry out back-off processing for this.
19. 1 kinds of channel equalization means based on reference signal, is characterized in that, comprising:
The receiver module that transmits, for receive transmitting and descriptor that sending node sends by down channel, wherein, described descriptor comprises for representing that described sending node carries out the back-off grade of back-off processing to described transmitting.
Channel information computing module, for according to from the described reference signal that transmits and recover, and obtains the reference signal channel information of described down channel;
Channel equalization module, for according to described back-off grade and described reference signal channel information, carries out channel equalization to the data-signal transmitting in described down channel.
20. balancers as claimed in claim 19, is characterized in that, described channel equalization module comprises:
The first acquiring unit, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The first computing unit, for described reference signal channel information is removed with the described back-off factor, obtains data-signal channel information;
The first balanced unit, for using described data-signal channel information to carry out channel equalization to described data-signal.
21. balancers as claimed in claim 19, is characterized in that, described channel equalization module comprises:
Second acquisition unit, for inquiring about the back-off factor that preset mapping table is corresponding according to described back-off grade;
The second computing unit, is multiplied by the described back-off factor for described receiving node to the described data-signal receiving;
The second balanced unit, for adopting described reference signal channel information to carry out channel equalization to the described data-signal being multiplied by after the back-off factor.
22. balancers as described in claim 19 to 21 any one, is characterized in that, what described descriptor also comprised whether expression ask mould processing for the data-signal sending with described reference signal simultaneously asks mould mark.
23. 1 kinds of reference signal nonlinear precoding treatment systems, is characterized in that, comprising:
Processing unit as described in claim 12-18 any one; And/or balancer as described in claim 19-22 any one.
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