Partial fractional Fourier transform (PFrFT)-MIMO-OFDM for known underwater acoustic communication channels

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Communication over doubly selective channels (both time and frequency selective) suffers from significant intercarrier interference (ICI). This problem is severe in underwater acoustic communications. In this paper, a novel partial fractional (PFrFT)-MIMO-OFDM system is proposed and implemented to further mitigate ICI. A new iterative band minimum mean square error (BMMSE) weight combining based on LDLH factorization is used in a scenario of perfect knowledge of channel information. The proposed method is extended from SISO-OFDM configuration to MIMO-OFDM. Simulation results demonstrate that the proposed PFrFT-LDLH outperforms the other methods in the SISO-OFDM scenario and that its performance can be improved in MIMO-OFDM scenarios.
Original languageEnglish
Article number469
Number of pages14
Issue number11
Publication statusPublished - 12 Nov 2021


  • multiple input multiple output (MIMO)
  • orthogonal frequency division multiplexing (OFDM)
  • partial fractional Fourier transform (PFrFT)
  • banded minimum mean square error (BMMSE)


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