Limited Feedback Scheme for Tomlinson-Harashima Precoding in Close-loop MIMO Systems

被引：0
|
作者：
Chen Runqian [1 ]
Wu Muqing [1 ]
Zheng Feng [1 ]
Lu Guoxian [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Lab Network Syst Architecture & Convergence, Beijing 100088, Peoples R China
来源：
2012 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING (WICOM) | 2012年
关键词：
multi-user multiple-input multiple-output systems; limited feedback; Tomlinson-Harashima precoding; channel vector quantization; Gaussian scalar quantization; CAPACITY;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, a novel limited feedback scheme, based on scalar quantization, is proposed for Tomlinson-Harashima precoding (THP) in multi-user multiple-input multiple-output (MU-MIMO) systems. Due to the sensitivity of THP to erroneous channel state information (CSI), the conventional codebook-based channel vector quantization (CVQ) is no longer suitable since its complexity grows exponentially with the increase of feedback bits. This paper combines the optimum Gaussian scalar quantization (GSQ) with THP to improve the accuracy of CSI for the flat Rayleigh fading channel. Simulation results show that the GSQ-THP scheme provides a very high capacity and a good bit error rate (BER) performance.
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页数：5
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