Pre-coding matrix selection method, device and system

Abstract

The embodiment of the invention discloses a pre-coding matrix selection method, a device and a system. The method comprises the steps that pilot frequency information sent by a sending end is received through the current channel; according to the pilot frequency information, an equivalent channel matrix of the current channel is estimated; inner product and modulo operation are respectively carried out on the equivalent channel matrix and each pre-coding matrix in a preset pre-coding codebook collection, so as to acquire a number of module values; the pre-coding matrix corresponding to the maximum module value in a number of module values is selected as a target matrix; and the target matrix is fed back to the sending end, so that the sending end selects the target matrix to carry out pre-coding on a signal sent through the current channel. The embodiment of the invention further discloses a pre-coding matrix selection device and system. According to the invention, the pre-coding matrix selection method, device and system are provided; a pre-coding selection process can be simplified; the calculation amount in the pre-coding selection process is reduced; and the problems of large calculation amount and complicated operation of the pre-coding matrix selection method in the prior art, are solved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for selecting a precoding matrix. Background technique [0002] Multiple-Input-Multiple-Output (MIMO) technology is aimed at improving the spectrum utilization rate of the system and expanding the capacity of the system. Multiple antennas or antenna arrays are used at the signal transmitting end and receiving end to transmit signals. In order to improve the performance of the system, the MIMO communication system can use the channel information to precode the signal to be sent. One of the ways is to pre-design a certain code containing a series of precoding matrices known by both the sending end and the receiving end. The codebook, the receiving end selects a precoding matrix in the codebook, and feeds back the index or indication (Precoding Matrix Indicator, PMI) of the precoding matrix to the sending end, so that the sending end uses t...

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Problems solved by technology

[0004] Embodiments of the present invention provide a method, device and system for selecting a precoding matrix, which are suitable for MIMO systems with multiple input and multiple output, so as to solve the problems of large amount of calculation and complicated operation in the precoding matrix selection method in the prior art

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