Layered Feedback Design for Close-Loop MIMO System

被引：0
|
作者：
Zhang Jinbao [1 ,2 ]
Zheng Hongming [3 ]
Tan Zhenhui [1 ]
Chen Yueyun [4 ]
机构：
[1] Beijing Jiaotong Univ BJTU, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China
[2] Southeast Univ SEU, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China
[3] Intel China Res Ctr, Beijing 100080, Peoples R China
[4] Univ Sci & Technol Beijing, Beijing 100083, Peoples R China
来源：
CHINESE JOURNAL OF ELECTRONICS | 2011年 / 20卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Close-loop MIMO system; Limited feedback; Codebook;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In close-loop MIMO system, transmitter can obtain instantaneous CSI by a feedback link from receiver. Then the CSI is used to beamform or precode the transmitting signal, achieving performance gain. In real application, limited codebook will lead to quantized error and loss of performance, so optimized feedback design becomes the key of close-loop MIMO system. Current feedback schemes are analyzed in this paper. To the questions of them, layered feedback is proposed. These feedback schemes are simulated in link level simulation to compare the performance of MIMO system. Simulation results show that, for different spatial correlations, comparing to current feedback schemes, the proposed feedback can obtain lower PER and higher capacity, with 1 or 2dB SNR gain, generally.
引用
收藏
页码：539 / 544
页数：6
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