Abstract
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.
Original language | English |
---|---|
Pages (from-to) | 282-286 |
Number of pages | 5 |
Journal | IEEE Signal Processing Letters |
Volume | 23 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2016 |
Keywords
- MIMO-OFDM
- partial FFT
- time-varying channels
- underwater acoustic communications