Zte Corporation

Tian Cai

Nan Li

Cheng Wang

Chen Huang

Chaowei Wang

Mingxia Cao

Yihuai Zhang

Disclosed are a method and apparatus for interference alignment based on codebook design and selection. The method includes: a codebook set including codebooks of different sizes of a precoding matrix is pre-designed or pre-stored; a receiver or a transmitter selects a codebook satisfying a specified condition from the codebook set to explicitly or implicitly notify the opposite end; the receiver designs, based on obtained ideal CSI and an interference alignment condition, a precoding matrix V and a receiving matrix U for interference alignment; the receiver selects a matrix V' having the highest similarity to V from the current codebook to serve as a finally quantized precoding matrix V&#x2032;; the receiver calculates, based on V&#x2032;, U again to obtain a receiving matrix U&#x2032; according to the interference alignment condition; and the transmitter transmits a signal according to feedback information and V&#x2032;, and the receiver filters the signal according to U&#x2032;.

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Shenzhen, China

Tian Cai