Block Transmissions over Doubly Selective Channels: Iterative Channel Estimation and Turbo Equalization

被引：11
|
作者：
Fang, Kun [2 ]
Rugini, Luca [1 ]
Leus, Geert [2 ]
机构：
[1] Univ Perugia, Elect & Informat Engn Dept, I-06125 Perugia, Italy
[2] Delft Univ Technol, Fac Elect Engn Math & Comp Sci, NL-2628 CD Delft, Netherlands
来源：
EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING | 2010年
关键词：
SINGLE-CARRIER; OFDM; DIVERSITY;
D O I：
10.1155/2010/974652
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：
Modern wireless communication systems require high transmission rates, giving rise to frequency selectivity due to multipath propagation. In addition, high-mobility terminals and scatterers induce Doppler shifts that introduce time selectivity. Therefore, advanced techniques are needed to accurately model the time-and frequency-selective (i.e., doubly selective) channels and to counteract the related performance degradation. In this paper, we develop new receivers for orthogonal frequency-division multiplexing (OFDM) systems and single-carrier (SC) systems in doubly selective channels by embedding the channel estimation task within low-complexity block turbo equalizers. Linear minimum mean-squared error (MMSE) pilot-assisted channel estimators are presented, and the soft data estimates from the turbo equalizers are used to improve the quality of the channel estimates.
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收藏
页数：13
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