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

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

时变水下声学信道上 MIMO-OFDM 的部分 FFT 解调

DOI:
10.1109/lsp.2015.2514059
复制
发表时间:
2016
影响因子:
3.9
通讯作者:
Han J
Han J
中科院分区:
工程技术2区
文献类型:
--
作者:
Han Jing;Zhang Lingling;Leus Geert;Han J

文献摘要

被引文献

相似文献

部分FFT解调是一种新兴的技术,用于缓解正交频分复用(OFDM)系统在时变水声信道上的载波间干扰(ICI)。在这封信中,我们将单输入单输出(SISO)配置的部分FFT解调方法扩展到多输入多输出(MIMO)情况。在没有信道知识的情况下,设计了一种自适应算法,迭代地进行滑动窗口信道估计、部分FFT合并和跨子载波的数据检测。此外,还引入了一个新的参数“残余ICI跨度”来抵消后组合的ICI,从而提供更好的系统性能。
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.