Joint channel and Doppler estimation for OSDM underwater acoustic communications

Jing Han, Sundeep Prabhakar Chepuri, Geert Leus

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising modulation scheme for underwater acoustic communications. Although providing more flexibility in system design, it suffers from a special interference structure over time-varying channels. To enable reliable OSDM equalization, we propose a joint channel impulse response and Doppler estimation algorithm in this paper. Compared to the existing method, which solves a nonconvex bilinear optimization problem iteratively in the frequency domain without a guarantee of global optimality, the proposed algorithm transforms the problem into a convex quadratic minimization in the time domain and can achieve a closed-form solution.

Original languageEnglish
Article number107446
Number of pages6
JournalSignal Processing
Volume170
DOIs
Publication statusPublished - 1 May 2020

Keywords

  • Channel estimation
  • Doppler estimation
  • OSDM
  • Time-varying channels
  • Underwater acoustic communications

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