Soft-Decision Feedback Turbo Equalization for LDPC-Coded MIMO Underwater Acoustic Communications

被引:42
|
作者
Rafati, Amirhossein [1 ]
Lou, Huang [1 ]
Xiao, Chengshan [1 ]
机构
[1] Missouri Univ Sci & Technol, Dept Elect & Comp Engn, Rolla, MO 65409 USA
基金
美国国家科学基金会;
关键词
Minimum mean square error (MMSE); multiple-input-multiple-output (MIMO); soft-decision feedback equalizer (SDFE); turbo equalization; underwater acoustic (UWA) communications;
D O I
10.1109/JOE.2013.2241933
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In this paper, a low-complexity turbo-detection scheme is proposed for single-carrier multiple-input-multiple-output (MIMO) underwater acoustic (UWA) communication systems that employ low-density parity-check (LDPC) channel coding. The proposed iterative soft-decision feedback equalization (SDFE) algorithm offers a novel approach to combat error propagation by utilizing the past soft decisions to mitigate intersymbol interference. In addition, we utilize an iterative data detection and channel estimation scheme to reduce the pilot overhead used in the data communication system. Performance of the proposed detection scheme is demonstrated through extensive communication data from two undersea experiments. The results show that the proposed SDFE algorithm provides robust detection for MIMO UWA communications with different modulations and different symbol rates, at different transmission ranges.
引用
收藏
页码:90 / 99
页数:10
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