Time-domain transmit beamforming for MIMO-OFDM systems

被引:0
|
作者
Liang, Yang-wen [1 ]
Schober, Robert [1 ]
Gerstacker, Wolfgang [2 ]
机构
[1] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada
[2] Univ Erlangen Nurnberg, Erlangen, Germany
关键词
D O I
暂无
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
Transmit beamforming (BF) and receive combining are simple and popular methods for performance enhancement in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. In this paper, we propose a novel time-domain BF (TD-BF) scheme for MIMO-OFDM systems which uses cyclic BF filters (C-BFFs). Assuming perfect channel state information (CSI) at the transmitter, the C-BFFs are optimized for maximization of the average mutual information per sub-carrier. Using a global vector quantization approach the C-BFFs are quantized for practical finite-rate feedback channels. Simulation and numerical results for typical IEEE 802.11n channels confirm the excellent performance of the proposed scheme and show that TD-BF has a more favorable performance/feed back rate trade-off than previously proposed frequency-domain BF (FD-BF) schemes.
引用
收藏
页码:3579 / +
页数:2
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