Frequency-domain channel estimation for SC-FDE in UWB communications

被引：37

作者：

Wang, Yue ^{[1
]}

Dong, Xiaodai ^{[1
]}

机构：

[1] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8W 3P6, Canada

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2006年 / 54卷 / 12期

关键词：

frequency-domain channel estimation; minimum mean-square error (MMSE) estimation; pilot-sequence-assisted channel estimation; single-carrier block transmission with frequency-domain; equalization (SC-FDE); ultra-wideband (UWB) communications;

D O I：

10.1109/TCOMM.2006.885084

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：

Recently, single-carrier block transmission with frequency-domain equalization (SC-FDE) has been shown to be a promising candidate for ultra-wideband (UWB) communications. In this paper, we address the channel estimation problem for SC-FDE transmission over UWB channels. A mean-square error (MSE) lower bound for the frequency-domain linear minimum mean-squared error (LMMSE) channel estimator is derived, and the optimal pilot sequence that achieves this lower bound is obtained. Further simplification leads to a frequency-domain channel estimator with reduced computational complexity. The performance of the simplified estimator for SC-FDE over UWB channels is evaluated and compared with that with perfect channel state information. The effects of nonoptimal and optimal pilot symbols are also investigated. Our results show that the proposed frequency-domain channel estimator performs well over UWB channels with only small performance degradation, compared with that with perfect channel estimation.

引用

页码：2155 / 2163

页数：9

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