Method and device for determining pre-coding matrix
A technology for determining a precoding matrix and a method for determining a precoding matrix, which is applied in the field of determining a method and a device for a precoding matrix, and can solve problems such as the inability to fully utilize the spatial characteristics of the channel matrix and poor system performance, and achieve the effects of improving throughput and optimizing system performance
Active Publication Date: 2015-01-21
HUAWEI TECH CO LTD
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[0006] However, when using the above artificial rank-reduced precoding matrix calculation method, although the actual channel matrix can be lowered to reduce the mutual interference between different links and improve the system performance to a certain extent, this The method cannot make full use of the spatial characteristics of the channel matrix, therefore, the obtained system performance is still poor
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] In the embodiment of the present invention, each transmitting end calculates its own precoding matrix, taking the jth transmitting end calculating its own precoding matrix as an example, the embodiment of the present invention introduces a method for determining the precoding matrix in detail, as follows figure 1 shown, including:
[0032] 101. Determine the rank constraint of the jth transmitting end;
[0033] According to the channel matrix from the jth t...
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Embodiments of the present disclosure disclose a method and an apparatus for determining a precoding matrix, which relate to the field of communications technologies and may improve throughput of a MIMO system and optimize overall system performance, including: determining a rank constraint of a jth transmitting end, where j=1, 2, . . . , K, and K is the total number of transmitting ends in a MIMO system; iteratively calculating an optimal precoding matrix of the jth transmitting end according to a channel matrix from the jth transmitting end to a jth receiving end, an autocorrelation matrix of interference and noise of the jth receiving end, and the rank constraint of the jth transmitting end, where the optimal precoding matrix maximizes channel capacity of a link from the jth transmitting end to the jth receiving end under a circumstance that precoding matrices of other transmitting ends do not change.
Description
technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for determining a precoding matrix. Background technique [0002] In a MIMO (Multiple-Input-Multiple-Output, multiple-input multiple-output system) interference channel, in order to improve system performance, it is usually necessary to select a better precoding matrix for the transmitting end. The prior art provides an artificial rank-reduced precoding matrix calculation method, which can calculate a better precoding matrix. The specific implementation steps are as follows: [0003] 1. In a MIMO system, each receiver measures and feeds back a channel matrix to its corresponding transmitter. Each transmitter sets a constraint on the maximum number of simultaneously transmitted data streams (the maximum number of simultaneously transmitted data streams is also the rank of the precoding matrix), and initializes a precoding matrix according to t...
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IPC IPC(8): H04L1/06H04L1/00
CPCH04L25/03974H04B7/0486
Inventor 王锐于浩刘坚能
Owner HUAWEI TECH CO LTD