Robust Precoding Scheme in Downlink Multiuser MIMO-OFDM Systems with Imperfect CSI

被引：2

作者：

Chang Linchen ^{[1
]}

Fukawa, Kazuhiko ^{[1
]}

Suzuki, Hiroshi ^{[1
]}

Suyama, Satoshi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Meguro Ku, Tokyo 1528550, Japan

来源：

2010 IEEE 21ST INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) | 2010年

关键词：

D O I：

10.1109/PIMRC.2010.5671887

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：

This paper proposes a precoding scheme for downlink multiuser MIMO-OFDM systems. The proposed precoding employs the minimum bit error rate (BER) criterion and estimates precoding matrices to minimize total BER of mobile stations by the steepest descent algorithm. As the cost function of the proposed scheme, an upper bound of the total BER is derived from the pairwise error probability (PEP) and is averaged with respect to channel state information (CSI) errors. Thus, the proposed scheme can be robust to imperfect CSI. Computer simulations under a frequency-selective fading condition demonstrate that the proposed precoder is more robust to the CSI errors than the zero-forcing (ZF) precoder, and that it is superior in BER to the conventional scheme.

引用

页码：437 / 442

页数：6