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
中科院分区:
文献类型:
--
作者:
Han Jing;Zhang Lingling;Leus Geert;Han J
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.