Method for providing pre-encoding matrix, method for providing decoding matrix and base station

Abstract

The embodiment of the invention discloses a method for providing a pre-encoding matrix, a method for providing a decoding matrix, and a base station. The method for providing the pre-encoding matrix comprises the following steps: the base station obtains an up channel matrix corresponding to each piece of user equipment; the base station combines the obtained up channel matrixes into a channel matrix; the base station decomposes the channel matrix by using a block diagonal singular value decomposition method to obtain a unitary matrix, wherein the diagonal line of the unitary matrix comprises block diagonal matrixes with the quantity same as that of the user equipment, and the block diagonal matrixes on the diagonal line correspond to the user equipment one by one; and the base station supplies each block diagonal matrix or one line of elements in each block diagonal matrix to the corresponding user equipment. By applying the technical scheme of the embodiment, the channel matrix is decomposed by using the block diagonal singular value decomposition method, and each piece of user equipment can respectively carry out pre-encoding processing or decoding processing by adopting the obtained diagonal matrix information, so that the performance of an MU-MIMO (multi-user multiple input multiple output) system can be improved.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method for providing a precoding matrix, a method for providing a decoding matrix and a base station. Background technique [0002] In a communication system, the precoding technology can effectively improve the receiving performance of the system. The specific method is that the transmitter uses the precoding matrix to process the transmitted information to obtain the transmitted signal. The precoding matrix can be obtained by decomposing the channel matrix through a matrix decomposition method. [0003] Commonly used matrix decomposition methods are Singular Value Decomposition (SVD, Singular Value Decomposition) method and Orthogonal Triangular Decomposition (QRD, QR Decomposition) method. [0004] Through the SVD method, any matrix can be decomposed into a unitary matrix, a product of a diagonal matrix and another unitary matrix, namely: H=U∑V H , where H is the matrix ...

AI Technical Summary

Problems solved by technology

However, in a multi-user multiple input multiple output (MU-MIMO, Multi-User Multiple Input Multiple Output) system, multiple user equipments are involved in sending and receiving information, which is limited to existing user equipments, and information cannot be exchanged between multiple user equipments. Therefore, multiple user equipments cannot know the channel information between each other

Therefore, neither the current SVD method nor the QRD method suitable for SU-MIMO can be used for joint processing of transmission and reception in MU-MIMO systems, resulting in no precoding processing scheme suitable for MU-MIMO systems.

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