Interference alignment based signal processing method for MIMO (Multiple Input Multiple Output) system in nonideal channel state

TL;DR: In this article, an interference alignment based signal processing method for an MIMO (Multiple Input Multiple Output) system in a non-ideal channel state, which relates to the field of wireless communication, is proposed.

Abstract: The invention discloses an interference alignment based signal processing method for an MIMO (Multiple Input Multiple Output) system in a nonideal channel state, relates to the field of wireless communication, and aims to increase the capacity of the MIMO system in the nonideal channel state. According to the signal processing method, after a central processing unit of a sending end well designs encoding matrixes and decoding matrixes, the encoding matrixes and the decoding matrixes are allocated to each base station, and the base stations transmit the corresponding decoding matrixes to corresponding receiving users. Namely, under the condition that the power of each user is limited and the channel state information has errors, linear encoding and decoding matrixes which enable the total average mean square error (MSE) of the users to be minimum are searched for optimization, firstly, precoding matrixes are initialized, and then the precoding matrixes and the decoding matrixes are updated in an iterating manner, so that the system throughput can be effectively increased.