Quantization Error-Aware Tomlinson-Harashima Precoding in Multiuser MISO Systems with Limited Feedback

Yanzhi SUN  Muqing WU  Jianming LIU  Chaoyi ZHANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.9   pp.3015-3018
Publication Date: 2012/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3015
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
MU-MISO systems,  limited feedback,  quantization error-aware,  zero forcing (ZF),  Tomlinson-Harashinma Precoding (THP),  

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Summary: 
In this letter, a quantization error-aware Tomlinson-Harashinma Precoding (THP) is proposed based on the equivalent zero-forcing (ZF) criterion in Multiuser Multiple-Input Single-Output (MU-MISO) systems with limited feedback, where the transmitter has only quantized channel direction information (CDI). This precoding scheme is robust to the channel uncertainties arising from the quantization error and the lack of channel magnitude information (CMI). Our simulation results show that the new THP scheme outperforms the conventional precoding scheme in limited feedback systems with respect to Bit Error Ratio (BER).