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′.

公开(公告)号：US20160308590A1

公开(公告)日：2016-10-20

申请号：US15102902

申请日：2014-06-16

Applicant: ZTE CORPORATION

Inventor： Chaowei WANG ,  Nan LI ,  Wanfang ZHANG ,  Cheng WANG ,  Xiao ZHANG ,  Shuai WANG ,  Chen HUANG

IPC: H04B7/04 ,  H04W72/08 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04B7/0452 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0619 ,  H04L1/0048 ,  H04L5/0037 ,  H04L5/0073 ,  H04L25/03343 ,  H04L25/03898 ,  H04W72/005 ,  H04W72/082 ,  H04W88/02 ,  H04W88/08

Abstract: Provided is a method for interference alignment applied to a multi-cell and multi-user Multiple Input Multiple Output (MIMO) system. The method includes that: a BS divides multiple users in a cell into a plurality of user groups, and notifies the multiple users of grouping information; and when one of the plurality of user groups is interfered by a neighbor cell, users in the one of the plurality of user groups cooperate with each other to perform interference alignment. The disclosure also provides a pre-coding method and system based on interference alignment. The disclosure, by means of grouping and cooperation of the users and designing of a receiving matrix of each user, achieves the effect of interference alignment in a signal transmission space of the BS.

Abstract translation: 提供了一种用于多小区和多用户多输入多输出（MIMO）系统的干扰对准的方法。 该方法包括：BS将小区中的多个用户划分为多个用户组，并向多个用户通知分组信息; 并且当所述多个用户组中的一个被相邻小区干扰时，所述多个用户组中的一个用户组中的用户彼此协作以执行干扰对准。 本公开还提供了基于干扰对准的预编码方法和系统。 通过用户的分组和协作以及每个用户的接收矩阵的设计，本发明实现了BS的信号传输空间中的干扰对准的效果。