OFDM for underwater acoustic communications: Adaptive synchronization and sparse channel estimation

  • Stojanovic M
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Abstract

A phase synchronization method, which provides non-uniform frequency offset compensation needed for wideband OFDM, is coupled with low-complexity channel estimation in the time domain. Sparsing of the channel impulse response leads to an improved performance, while adaptive synchronization supports decision-directed operation and yields low overhead. System performance is demonstrated using experimental data transmitted over a 1 km shallow water channel in the 19 kHz - 31 kHz band.

Author-supplied keywords

  • OFDM
  • Underwater acoustic communications
  • channel sparsing
  • non-uniform Doppler distortion

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Authors

  • M. Stojanovic

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