Data detection techniques for OFDM signals over Doppler-distorted channels

Signal scaling due to Doppler in underwater acoustic communications results in inter-carrier interference (ICI) and severely degraded detection performance in OFDM based systems in the absence of interference mitigation. Using a recently proposed partial FFT demodulation technique [5], where several FFT demodulators operate over parallel non-overlapping segments, two efficient algorithms which reduce ICI and error probability significantly are proposed. Numerical simulations demonstrate an improvement of several dB over conventional OFDM detection techniques at the cost of a small increase in complexity.

[1]  Milica Stojanovic,et al.  MIMO OFDM over underwater acoustic channels , 2009, 2009 Conference Record of the Forty-Third Asilomar Conference on Signals, Systems and Computers.

[2]  Paul Hursky,et al.  Mitigation of intercarrier interference in OFDM systems over underwater acoustic channels , 2009, OCEANS 2009-EUROPE.

[3]  Urbashi Mitra,et al.  Partial FFT demodulation: A detection method for doppler distorted OFDM systems , 2010, 2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC).

[4]  Milica Stojanovic,et al.  Adaptive Channel Estimation for Underwater Acoustic MIMO OFDM Systems , 2009, 2009 IEEE 13th Digital Signal Processing Workshop and 5th IEEE Signal Processing Education Workshop.

[5]  L. Freitag,et al.  This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE JOURNAL OF OCEANIC ENGINEERING 1 Peer-Reviewed Technical Communication Multicarrier Communication Over Un , 2022 .