Partial FFT Demodulation for MIMO-OFDM Over Time-Varying Underwater Acoustic Channels

被引:40
作者
Han, Jing [1 ]
Zhang, Lingling [1 ]
Leus, Geert [2 ]
机构
[1] Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Peoples R China
[2] Delft Univ Technol, Fac Elect Engn Math & Comp Sci, NL-2826 CD Delft, Netherlands
基金
中国国家自然科学基金;
关键词
MIMO-OFDM; partial FFT; time-varying channels; underwater acoustic communications; LOW-COMPLEXITY EQUALIZATION; MULTICARRIER COMMUNICATION;
D O I
10.1109/LSP.2015.2514059
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
Partial FFT demodulation is a newly-emerging technique to mitigate the inter-carrier interference (ICI) of orthogonal frequency division multiplexing (OFDM) systems over time-varying underwater acoustic channels. In this letter, we extend the partial FFT demodulation method for a single-input single-output (SISO) configuration to the multiple-input multiple-output (MIMO) case. By assuming no channel knowledge, we design an adaptive algorithm which performs sliding-window channel estimation, partial FFT combining and data detection across subcarriers iteratively. Furthermore, a new parameter "residual ICI span" is introduced to counteract the post-combining ICI and provide a better system performance.
引用
收藏
页码:282 / 286
页数:5
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