公开(公告)号：US20170149549A1

公开(公告)日：2017-05-25

申请号：US15319805

申请日：2014-10-20

Applicant: ZTE CORPORATION

Inventor： Chaowei WANG ,  Chen HUANG ,  Cheng WANG ,  Nan LI ,  Mingxia CAO ,  Tian CAI ,  Yihuai ZHANG

IPC: H04L5/14 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0452

CPC classification number: H04L5/14 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0626 ,  H04L25/03

Abstract: 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′; the receiver calculates, based on V′, U again to obtain a receiving matrix U′ according to the interference alignment condition; and the transmitter transmits a signal according to feedback information and V′, and the receiver filters the signal according to U′.