Limited feedback scheme based on Zero-forcing Precoding for Multiuser MIMO-OFDM Downlink Systems

被引：0
|
作者：
Chen, Zhiyong [1 ]
Wang, Wenbo [1 ]
Peng, Mugen [1 ]
Caot, Fengming [2 ]
机构：
[1] Beijing Univ Posts & Telecommun, Minist Educ, Key Lab Universal Wireless Commun, Beijing, Peoples R China
[2] Toshiba Res Europe Ltd, Telecom Res Lab, Bristol BS1 4ND, Avon, England
来源：
2010 5TH ANNUAL ICST WIRELESS INTERNET CONFERENCE (WICON 2010) | 2010年
基金：
中国国家自然科学基金;
关键词：
Zero-forcing precoding; CQI; CDI; MMSE; MU-MIMO; BROADCAST CHANNELS;
D O I：
10.4108/ICST.WICON2010.8548
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
Conventional zero-forcing precoding was well investigated, but it hadn't considered the channel quality indicator (CQI) mismatch for practical system with limited feedback. This paper studies a novel zero-forcing precoding with channel quality indicator (CQI) estimation and adjusting, channel directional information(CDI) quantization, user scheduling and link adaptation and then proposes a CQI estimation algorithm for multiuser multiple input multiple output antenna (MU-MIMO) downlink systems with limited feedback. Simulation with 3GPP long term evolution system demonstrates that the scheme with proposed method can significantly improve system performance, compared with conventional zero-forcing precoding and single user MIMO systems.
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页数：5
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