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

Jing Han, Lingling Zhang, G. Leus

Research output: Contribution to journalArticleScientificpeer-review


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 languageEnglish
Pages (from-to)282-286
Number of pages5
JournalIEEE Signal Processing Letters
Issue number2
Publication statusPublished - 1 Feb 2016


  • partial FFT
  • time-varying channels
  • underwater acoustic communications


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