Vector Precoding for Multiuser MIMO Downlink System under Different Qos Requirements

被引：0

作者：

方赓

机构：

[1] DepartmentofInformationTechnologyNanjingCollegeofChemicalTechnology

来源：

网友世界 | 2012年 / 06期

关键词：

MIMO; Vector Precoding; zero-forcing;

D O I：

暂无

中图分类号：

TN911.22 [信道编码理论];

学科分类号：

070104 ; 081101 ;

摘要：

The conventional zero-forcing vector precoding can provide the same SNR for decentralized receiving users.In order to meet different Qos requirement of multimedia applications,we modified the conventional precoding matrix by using a diagonal matrix named relative SNR control matrix so that different SNR can be got for different users' requirements.Then,with the new precoding matrix used,we analyze the average SNR of all MTs.We find that if a proper perturbation vector is chosen under the power constraint,the average SNR can be maximized.Finally,we indicate that the choice of perturbation vector is a K-dimensional problem which has low complexity algorithm to solve.Simulation shows that our scheme is very effective for multimedia applications.

引用

页码：23 / 26

页数：4