Pre-coding method and device according to complex matrix

A complex matrix and precoding technology, applied in the field of singular value decomposition, can solve problems such as inability to meet real-time requirements and long processing time

Inactive Publication Date: 2016-02-10
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0006] However, the existing SVD methods for complex matrices all have the problem of long processing time and cannot meet the increasingly high real-time requirements.

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  • Pre-coding method and device according to complex matrix

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Embodiment Construction

[0059] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0060] The embodiment of the present invention aims at the problem that the SVD method for the complex matrix in the prior art has a long processing time and cannot adapt to the increasingly high real-time requirements, and provides a method and device for precoding based on the complex matrix , which can reduce the processing time of SVD on the complex matrix and meet the increasingly higher real-time requirements.

[0061] figure 2 It is a schematic flowchart of a method for performing precoding according to a complex matrix in an embodiment of the present invention. The method is applied to a multiple-input multiple-output MIMO system, and the channel of the MIMO system is a complex matrix H, such as figure 2 As shown, this embod...

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Abstract

The invention provides a pre-coding method and device according to a complex matrix, belonging to the field of singular value decomposition, wherein the method comprises the following steps: a step of constructing a real matrix: constructing the real matrix shown in the specification corresponding to the complex matrix H=A+Bi; a step of diagonalizing: diagonalizing the real matrix X through Jacobi iteration so as to obtain a diagonalizable matrix of the real matrix, wherein all non-diagonal elements in the diagonalizable matrix are not more than a pre-set threshold value; a step of calculating the matrix: calculating a singular value diagonalizable matrix D and a right singular matrix V of the complex matrix according to a Jacobi rotational transformation matrix used in the diagonalizable matrix; and a step of pre-coding: pre-coding a signal to be transmitted by an MIMO transmitter utilizing the right singular matrix V by taking the right singular matrix V as a filter matrix. By means of the technical scheme provided by the invention, the SVD processing time of the complex matrix can be reduced; and increasingly high real-time requests can be satisfied.

Description

technical field [0001] The present invention relates to the field of singular value decomposition, in particular to a method and device for precoding based on a complex matrix. Background technique [0002] SVD (Singular Value Decomposition, Singular Value Decomposition) is one of the most basic and important tools of modern numerical analysis. It is widely used in statistical analysis, signal and image processing, system theory and control. [0003] For example, in a communication system, channel capacity is one of the important indicators of Shannon's information communication theory. This concept represents the maximum data transmission capacity of a communication channel and is an important basis for comparing and evaluating the performance of a communication system. Since the introduction of MIMO (Multiple-Input Multiple-Output) into the HSPDA (High Speed ​​Downlink Packet Access, High Speed ​​Downlink Packet Access) communication system, the MIMO technology has always ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 孔令斌袁雁南段然崔春风易芝玲
Owner CHINA MOBILE COMM GRP CO LTD
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