CN108111205A - Eliminate the method and apparatus disturbed in extensive mimo system between grouping user - Google Patents
Eliminate the method and apparatus disturbed in extensive mimo system between grouping user Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
- H04L25/03898—Spatial equalizers codebook-based design
- H04L25/0391—Spatial equalizers codebook-based design construction details of matrices
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Abstract
The present invention discloses a kind of method and apparatus for eliminating and being disturbed in extensive mimo system between grouping user, is related to the communications field.The corresponding null space matrix of each user grouping is wherein obtained by channel estimation, equivalent precoding channel is determined using the null space matrix and subscriber channel information of each user grouping, precoding is carried out to the equivalent precoding channel of each user grouping to obtain user's pre-coding matrix in group, utilize user's pre-coding matrix in the null space matrix and group of each user grouping, it forms and eliminates interference pre-coding matrix, base band data is handled using interference pre-coding matrix is eliminated, with the baseband signal being used for transmission.By the present invention in that being configured to the pre-coding matrix disturbed between elimination group with kernel, eliminated so as to effectively realize interference, promote channel utilization.The present invention does not limit the realization method of precoding in group, supports every group of at least one user of division, has great flexibility, the compatibility with existing MIMO precoding algorithms.
Description
Technical field
It is more particularly to a kind of to eliminate the side disturbed in extensive mimo system between grouping user the present invention relates to the communications field
Method and device.
Background technology
In a wireless communication system, extensive MIMO (Massive MIMO) technology can with significant increase throughput of system,
And the interference between unicast user is eliminated to realize multiuser MIMO (MU-MIMO), and further using Linear Precoding
The flexibility of increase system and channel utilization.Since extensive MIMO technology can be such that system performance is significantly carried with spectrum efficiency
It rises, therefore extensive MIMO technology is also regarded as one of core technology of 5G and is widely studied.
With the exponential growth of wireless data traffic used in the quantity of mobile equipment and people, research people is driven
Member probes into solve this growing demand for new technology and method.Follow-on radio data network is claimed
Make the 5th generation mobile communication technology or 5G, it is necessary to it solves to challenge present in capacity limit and some existing communication systems,
Reliability, coverage rate, energy efficiency and retardance of network etc..A kind of extensive implementations of the MIMO as 5G technologies,
By the wireless data traffic and the company that realize bigger (more than 64) using substantial amounts of antenna on base station transceiver (BTS)
Connect reliability.This mode fundamentally changes the base station transceiver framework of existing standard, and existing standard has only used most
The sector topology of more 8 antennas compositions.Due to possessing hundreds of antenna element, extensive MIMO can use precoding skill
Art collection will be measured and focused on destination mobile terminal, so as to reduce radiant power.By the way that energy is directed to specific user, spoke
Power reduction is penetrated, the interference simultaneously for other users also reduces.This characteristic is for cellular network limited by interference at present
For be very attractive.
User is often divided into multiple groups in a wireless communication system, including unicast group and multicast group.How this
It further effectively eliminates under scene and disturbs between user group, be a urgent problem.
The content of the invention
The embodiment of the present invention provides a kind of method and apparatus for eliminating and being disturbed in extensive mimo system between grouping user, leads to
It crosses using the means of kernel to be configured to the pre-coding matrix disturbed between elimination group, be eliminated so as to effectively realize interference,
Promote channel utilization.
According to an aspect of the present invention, a kind of side for eliminating and being disturbed in extensive mimo system between grouping user is provided
Method, including：
The corresponding null space matrix of each user grouping is obtained by channel estimation；
Using the null space matrix of each user grouping and subscriber channel information, corresponding equivalent precoding channel is determined；
Precoding is carried out to the equivalent precoding channel of each user grouping with user's pre-coding matrix in being organized accordingly；
Using user's pre-coding matrix in the null space matrix and group of each user grouping, form and eliminate interference precoding square
Battle array；
Base band data is handled using interference pre-coding matrix is eliminated, with the baseband signal being used for transmission.
In one embodiment, obtaining the corresponding null space matrix of each user grouping by channel estimation includes：
The subscriber channel information G of m-th of user grouping is obtained by channel estimationm, wherein 1≤m≤M, M are user grouping
Sum；
For m-th of user grouping, to corresponding channel matrixSingular value decomposition is carried out, to obtain corresponding 0 characteristic value
Feature vector groupWherein channel matrixInclude except GmOutside all other user grouping subscriber channel information；
Utilize feature vector groupConstruct the null space matrix J of m-th of user groupingm。
In one embodiment, the null space matrix J of m-th of user groupingmFor：
Wherein, the transposition conjugation of subscript H representing matrixes.
In one embodiment, using the null space matrix of each user grouping and subscriber channel information, determine corresponding
Equivalent precoding channel includes：
For m-th of user grouping, corresponding equivalent precoding channelFor null space matrix JmWith subscriber channel information
GmProduct.
In one embodiment, using user's pre-coding matrix in the null space matrix and group of each user grouping, composition disappears
Except interference pre-coding matrix includes：
By user's pre-coding matrix ω in the group of each user groupingmPair of block diagonal matrix ω is aligned to according to order of packets
On linea angulata；
By the corresponding null space matrix J of each user groupingmAccording to order of packets is transversely arranged square is mapped to form kernel
Battle array J；
It is formed using block diagonal matrix ω and kernel mapping matrix J and eliminates interference pre-coding matrix.
In one embodiment, it is block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
According to another aspect of the present invention, a kind of dress for eliminating and being disturbed in extensive mimo system between grouping user is provided
It puts, prelists including user's precoding matrix module, elimination interference in null space matrix module, equivalent precoding channel module, group
Code matrix module and base-band information processing module, wherein：
Null space matrix module obtains the corresponding null space matrix of each user grouping for passing through channel estimation；
Equivalent precoding channel module for utilizing the null space matrix of each user grouping and subscriber channel information, determines
Go out corresponding equivalent precoding channel；
User's precoding matrix module in group, for being obtained to the progress precoding of the equivalent precoding channel of each user grouping
User's pre-coding matrix in corresponding group；
Interference precoding matrix module is eliminated, for utilizing user's precoding in the null space matrix of each user grouping and group
Matrix forms and eliminates interference pre-coding matrix；
Base-band information processing module, for being handled using elimination interference pre-coding matrix base band data, to obtain
The baseband signal being used for transmission.
In one embodiment, it is empty to specifically include channel estimating unit, matrix decomposition unit and zero for null space matrix module
Between matrix construction unit, wherein：
Channel estimating unit obtains the subscriber channel information G of m-th of user grouping for passing through channel estimationm, wherein 1
≤ m≤M, M are user grouping sum；
Matrix decomposition unit, for for m-th of user grouping, to corresponding channel matrixCarry out singular value decomposition,
To obtain the feature vector group of corresponding 0 characteristic valueWherein channel matrixInclude except GmOutside all other user point
The subscriber channel information of group；
Null space matrix structural unit, for utilizing feature vector groupConstruct the null space matrix of m-th of user grouping
Jm。
In one embodiment, the null space matrix J of m-th of user groupingmFor：
Wherein, the transposition conjugation of subscript H representing matrixes.
In one embodiment, for m-th of user grouping, corresponding equivalent precoding channelFor null space matrix
JmWith subscriber channel information GmProduct.
In one embodiment, eliminating interference precoding matrix module includes block diagonal matrix generation unit, kernel square
Battle array generation unit and pre-coding matrix Component units, wherein：
Block diagonal matrix generation unit, for by user's pre-coding matrix ω in the group of each user groupingmIt is suitable according to being grouped
Sequence is aligned on the diagonal of block diagonal matrix ω；
Null space matrix generation unit, for by the corresponding null space matrix J of each user groupingmIt is horizontal according to order of packets
It arranges to form kernel mapping matrix J；
Pre-coding matrix Component units eliminate interference for being formed using block diagonal matrix ω and kernel mapping matrix J
Pre-coding matrix.
In one embodiment, it is block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It 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 attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the signal that the present invention eliminates the method one embodiment disturbed in extensive mimo system between grouping user
Figure.
Fig. 2 is the signal that the present invention eliminates the device one embodiment disturbed in extensive mimo system between grouping user
Figure.
Fig. 3 is the signal that the present invention eliminates another embodiment of device disturbed in extensive mimo system between grouping user
Figure.
Fig. 4 is the signal that the present invention eliminates the another embodiment of device disturbed in extensive mimo system between grouping user
Figure.
Fig. 5 is the extensive mimo system schematic diagram for implementing the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
Unless specifically stated otherwise, the component and positioned opposite, the digital table of step otherwise illustrated in these embodiments
It is not limited the scope of the invention up to formula and numerical value.
Simultaneously, it should be appreciated that for ease of description, the size of the various pieces shown in attached drawing is not according to reality
Proportionate relationship draw.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
Fig. 1 is the signal that the present invention eliminates the method one embodiment disturbed in extensive mimo system between grouping user
Figure.Wherein：
Step 101, the corresponding null space matrix of each user grouping is obtained by channel estimation.
For example, obtaining subscriber channel information by channel estimation, subscriber channel information is grouped according to user grouping,
To obtain matrix G.Wherein：
G=[G1, G2..., Gm..., GM]T (1)
Wherein T representing matrixes transposition, GmFor the subscriber channel information of m-th of user grouping, 1≤m≤M, M are user grouping
Sum.
For m-th of user grouping, to corresponding channel matrixSingular value decomposition is carried out, to obtain corresponding 0 characteristic value
Feature vector groupWherein channel matrixInclude except GmOutside all other user grouping subscriber channel information.
For example, for m groups, corresponding channel matrix(channel matrix of non-m groups) is：
It is rightSVD (Singular Value Decomposition, singular value decomposition) is carried out, i.e.,：
Next, utilize feature vector groupConstruct the null space matrix J of m-th of user groupingm。
Optionally, the null space matrix J of m-th of user groupingmFor：
Wherein, the transposition conjugation of subscript H representing matrixes.
Step 102, using the null space matrix of each user grouping and subscriber channel information, equivalent accordingly prelist is determined
Code channel.
Optionally, for m-th of user grouping, corresponding equivalent precoding channelFor null space matrix JmAnd user
Channel information GmProduct.I.e.：
Step 103, it is pre- with user in being organized accordingly that precoding is carried out to the equivalent precoding channel of each user grouping
Encoder matrix.
For example, by precoding, it can be by equivalent precoding channelUser's pre-coding matrix ω in being organized accordinglym。
Here, precoding can arbitrarily make choice as needed in group.
Step 104, using user's pre-coding matrix in the null space matrix and group of each user grouping, form and eliminate interference in advance
Encoder matrix.
It for example, first can be by user's pre-coding matrix ω in the group of each user groupingmBlock pair is aligned to according to order of packets
On the diagonal of angular moment battle array ω.I.e.：
ω=diag (ω1,ω2,...,ωM) (7)
Secondly, by the corresponding null space matrix J of each user groupingmIt is reflected according to order of packets is transversely arranged with forming kernel
Penetrate matrix J.I.e.：
J=[J1,J2…JM] (8)
Finally, formed using block diagonal matrix ω and kernel mapping matrix J and eliminate interference pre-coding matrix.
Optionally, it is block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
Pre-coding matrix is disturbed by using the elimination, can effectively be disturbed between elimination group.
Step 105, base band data is handled using elimination interference pre-coding matrix, with the base band being used for transmission
Signal.
For example, setting the base band data matrix for needing to send as S, after being handled by using aforesaid way base band data and lead to
It crosses radio frequency unit and large-scale antenna array is sent to recipient, then the information Y that recipient receives is：
Wherein P is transmission power, and z is interchannel noise.
In above formula (9), since ω meets above formula (7), i.e. ω only has value on the leading diagonal of matrix, and other parts are equal
For 0, therefore above formula (9) can be turned to further：
It,, can by matrix operation since first matrix on the right side of equal sign is still diagonal matrix in formula (10)
It effectively eliminates and disturbs between group.For example, the precoding mode can eliminate group and group, group and unicast user, unicast user and unicast
Interference between user.
The method disturbed in the extensive mimo system of elimination provided based on the above embodiment of the present invention between grouping user, is led to
It crosses using the means of kernel to be configured to the pre-coding matrix disturbed between elimination group, be eliminated so as to effectively realize interference,
Promote channel utilization.
Fig. 2 is that the present invention eliminates the device disturbed in extensive mimo system between grouping user, including null space matrix mould
Block 201, equivalent precoding channel module 202, user's precoding matrix module 203 in group eliminate interference precoding matrix module
204 and base-band information processing module 205, wherein：
Null space matrix module 201 is used to obtain the corresponding null space matrix of each user grouping by channel estimation.
Equivalent precoding channel module 202 is used to utilize the null space matrix of each user grouping and subscriber channel information, really
Make corresponding equivalent precoding channel.
In group user's precoding matrix module 203 be used to carrying out the equivalent precoding channel of each user grouping precoding with
User's pre-coding matrix in being organized accordingly.
Here, precoding can arbitrarily make choice as needed in group.
Interference precoding matrix module 204 is eliminated for prelisting using user in the null space matrix and group of each user grouping
Code matrix forms and eliminates interference pre-coding matrix.
Base-band information processing module 205 is used to handle base band data using elimination interference pre-coding matrix, with
To the baseband signal being used for transmission.
The device disturbed in the extensive mimo system of elimination provided based on the above embodiment of the present invention between grouping user, is led to
It crosses using the means of kernel to be configured to the pre-coding matrix disturbed between elimination group, be eliminated so as to effectively realize interference,
Promote channel utilization.
Fig. 3 is the signal that the present invention eliminates another embodiment of device disturbed in extensive mimo system between grouping user
Figure.In the embodiment shown in fig. 3, above-mentioned null space matrix module 201 further comprises channel estimating unit 301, matrix point
Solve unit 302 and null space matrix structural unit 303.Wherein：
Channel estimating unit 301 is used to obtain the subscriber channel information G of m-th of user grouping by channel estimationm, wherein
1≤m≤M, M are user grouping sum.
Matrix decomposition unit 302 is used for for m-th of user grouping, to corresponding channel matrixCarry out singular value point
Solution, to obtain the feature vector group of corresponding 0 characteristic valueWherein channel matrixInclude except GmOutside all other user
The subscriber channel information of grouping.
Wherein, channel matrixCan be as shown in above-mentioned formula (2), corresponding singular value decomposition can be such as above-mentioned formula (3) institute
Show.
Null space matrix structural unit 303 is used to utilize feature vector groupConstruct the kernel square of m-th of user grouping
Battle array Jm。
Wherein, the null space matrix J of m-th of user groupingmIt can be as shown in above-mentioned formula (4).
Optionally, for m-th of user grouping, corresponding equivalent precoding channelFor null space matrix JmAnd user
Channel information GmProduct.
Wherein, equivalent precoding channelIt can be as shown in above-mentioned formula (5).
Fig. 4 is the signal that the present invention eliminates the another embodiment of device disturbed in extensive mimo system between grouping user
Figure.In this embodiment, above-mentioned elimination interference precoding matrix module 204 can further comprise block diagonal matrix generation unit
401st, null space matrix generation unit 402 and pre-coding matrix Component units 403.Wherein：
Block diagonal matrix generation unit 401 is used for user's pre-coding matrix ω in the group of each user groupingmAccording to grouping
It is ranked sequentially on the diagonal of block diagonal matrix ω.
For example, block diagonal matrix generation unit 401 can utilize above-mentioned formula (7) construction block diagonal matrix ω.
Null space matrix generation unit 402 is used for the corresponding null space matrix J of each user groupingmIt is horizontal according to order of packets
To arrangement to form kernel mapping matrix J.
For example, null space matrix generation unit 402 can utilize above-mentioned formula (8) construction kernel mapping matrix J.
Pre-coding matrix Component units 403 are used to form to eliminate using block diagonal matrix ω and kernel mapping matrix J to do
Disturb pre-coding matrix.
Optionally, it can be block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
Those skilled in the art in the above-mentioned extensive mimo system of elimination of the present invention between grouping user it will be appreciated that do
The device disturbed can as a component in baseband processing unit or can be there is this Base-Band Processing list
Member.Correspondingly, in extensive mimo system, the modulates baseband signals that radio frequency unit generates baseband processing unit are believed for radio frequency
Number, large-scale antenna array sends the radiofrequency signal modulated from corresponding ports.Under normal conditions, extensive antenna
Antenna number in array is more than 64.
Fig. 5 is the extensive mimo system schematic diagram for implementing the present invention.Wherein, for the various user groupings in network,
The present invention can effectively eliminate the interference between group and group, group and unicast user, unicast user and unicast user.
By applying the present invention, following advantageous effect can be obtained：
[1] this method can be disturbed effectively between reduction group, promote channel utilization.
[2] this method does not limit the realization method of precoding in group, supports every group of at least one user of division, has pole
Big flexibility and the compatibility of existing MIMO precoding algorithms.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
Description of the invention provides for the sake of example and description, and is not exhaustively or by the present invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
It states embodiment and is to more preferably illustrate the principle of the present invention and practical application, and those of ordinary skill in the art is enable to manage
The present invention is solved so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (12)
1. a kind of eliminate the method disturbed in extensive mimo system between grouping user, which is characterized in that including：
The corresponding null space matrix of each user grouping is obtained by channel estimation；
Using the null space matrix of each user grouping and subscriber channel information, corresponding equivalent precoding channel is determined；
Precoding is carried out to the equivalent precoding channel of each user grouping with user's pre-coding matrix in being organized accordingly；
Using user's pre-coding matrix in the null space matrix and group of each user grouping, form and eliminate interference pre-coding matrix；
Base band data is handled using interference pre-coding matrix is eliminated, with the baseband signal being used for transmission.
2. according to the method described in claim 1, it is characterized in that,
Obtaining the corresponding null space matrix of each user grouping by channel estimation includes：
The subscriber channel information G of m-th of user grouping is obtained by channel estimationm, wherein 1≤m≤M, M are user grouping sum；
For m-th of user grouping, to corresponding channel matrixSingular value decomposition is carried out, to obtain the spy of corresponding 0 characteristic value
Levy Vector GroupsWherein channel matrixInclude except GmOutside all other user grouping subscriber channel information；
Utilize feature vector groupConstruct the null space matrix J of m-th of user groupingm。
3. according to the method described in claim 2, it is characterized in that,
The null space matrix J of m-th of user groupingmFor：
<mrow>
<msub>
<mi>J</mi>
<mi>m</mi>
</msub>
<mo>=</mo>
<msubsup>
<mi>V</mi>
<mover>
<mi>m</mi>
<mo>&OverBar;</mo>
</mover>
<mn>0</mn>
</msubsup>
<msup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>V</mi>
<mover>
<mi>m</mi>
<mo>&OverBar;</mo>
</mover>
<mn>0</mn>
</msubsup>
<mo>)</mo>
</mrow>
<mi>H</mi>
</msup>
</mrow>
Wherein, the transposition conjugation of subscript H representing matrixes.
4. according to the method described in claim 2, it is characterized in that,
Using the null space matrix of each user grouping and subscriber channel information, determine that corresponding equivalent precoding channel includes：
For m-th of user grouping, corresponding equivalent precoding channelFor null space matrix JmWith subscriber channel information Gm's
Product.
5. according to the method described in claim 4, it is characterized in that,
Using user's pre-coding matrix in the null space matrix and group of each user grouping, form and eliminate interference pre-coding matrix bag
It includes：
By user's pre-coding matrix ω in the group of each user groupingmThe diagonal of block diagonal matrix ω is aligned to according to order of packets
On；
By the corresponding null space matrix J of each user groupingmIt is transversely arranged to form kernel mapping matrix J according to order of packets；
It is formed using block diagonal matrix ω and kernel mapping matrix J and eliminates interference pre-coding matrix.
6. according to the method described in claim 5, it is characterized in that,
It is block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
7. a kind of eliminate the device disturbed in extensive mimo system between grouping user, which is characterized in that including null space matrix
Module, equivalent precoding channel module, user's precoding matrix module in group eliminate interference precoding matrix module and base band letter
Processing module is ceased, wherein：
Null space matrix module obtains the corresponding null space matrix of each user grouping for passing through channel estimation；
Equivalent precoding channel module for utilizing the null space matrix of each user grouping and subscriber channel information, determines phase
The equivalent precoding channel answered；
User's precoding matrix module in group, for obtaining phase to the progress precoding of the equivalent precoding channel of each user grouping
User's pre-coding matrix in the group answered；
Interference precoding matrix module is eliminated, for utilizing user's precoding square in the null space matrix of each user grouping and group
Battle array forms and eliminates interference pre-coding matrix；
Base-band information processing module, for being handled using elimination interference pre-coding matrix base band data, to be used for
The baseband signal of transmission.
8. device according to claim 7, which is characterized in that null space matrix module specifically include channel estimating unit,
Matrix decomposition unit and null space matrix structural unit, wherein：
Channel estimating unit obtains the subscriber channel information G of m-th of user grouping for passing through channel estimationm, wherein 1≤m≤
M, M are user grouping sum；
Matrix decomposition unit, for for m-th of user grouping, to corresponding channel matrixSingular value decomposition is carried out, with
To the feature vector group of corresponding 0 characteristic valueWherein channel matrixInclude except GmOutside all other user grouping
Subscriber channel information；
Null space matrix structural unit, for utilizing feature vector groupConstruct the null space matrix J of m-th of user groupingm。
9. device according to claim 8, which is characterized in that
The null space matrix J of m-th of user groupingmFor：
<mrow>
<msub>
<mi>J</mi>
<mi>m</mi>
</msub>
<mo>=</mo>
<msubsup>
<mi>V</mi>
<mover>
<mi>m</mi>
<mo>&OverBar;</mo>
</mover>
<mn>0</mn>
</msubsup>
<msup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>V</mi>
<mover>
<mi>m</mi>
<mo>&OverBar;</mo>
</mover>
<mn>0</mn>
</msubsup>
<mo>)</mo>
</mrow>
<mi>H</mi>
</msup>
</mrow>
Wherein, the transposition conjugation of subscript H representing matrixes.
10. device according to claim 8, which is characterized in that
For m-th of user grouping, corresponding equivalent precoding channelFor null space matrix JmWith subscriber channel information Gm's
Product.
11. device according to claim 10, which is characterized in that eliminating interference precoding matrix module includes block to angular moment
Battle array generation unit, null space matrix generation unit and pre-coding matrix Component units, wherein：
Block diagonal matrix generation unit, for by user's pre-coding matrix ω in the group of each user groupingmIt is arranged according to order of packets
Onto the diagonal of block diagonal matrix ω；
Null space matrix generation unit, for by the corresponding null space matrix J of each user groupingmIt is transversely arranged according to order of packets
To form kernel mapping matrix J；
Pre-coding matrix Component units are prelisted for being formed to eliminate to disturb using block diagonal matrix ω and kernel mapping matrix J
Code matrix.
12. according to the devices described in claim 11, which is characterized in that
It is block diagonal matrix ω premultiplication kernel mapping matrixes J to eliminate interference pre-coding matrix.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019238310A1 (en) * | 2018-06-13 | 2019-12-19 | Robert Bosch Gmbh | Grouping apparatus and method for grouping at least the received signals from at least four transmitters distributed over an overall area |
| CN112152671A (en) * | 2020-10-29 | 2020-12-29 | 国网江西省电力有限公司经济技术研究院 | MIMO power line carrier communication method and system |
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