Joint channel and Doppler estimation for OSDM underwater acoustic communications

Han, J and Chepuri, S P and Leus, G (2020) Joint channel and Doppler estimation for OSDM underwater acoustic communications. In: Signal Processing, 170 .

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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.

Item Type:	Journal Article
Publication:	Signal Processing
Publisher:	Elsevier B.V.
Additional Information:	Copyright of this article belongs to Elsevier B.V.
Keywords:	Channel estimation; Doppler effect; Frequency domain analysis; Impulse response; Iterative methods; Time domain analysis; Time varying networks, Bilinear optimizations; Channel impulse response; Doppler estimations; Interference structures; OSDM; Quadratic minimization; Time varying channel; Underwater acoustic communications, Underwater acoustics
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	20 Jan 2020 11:35
Last Modified:	20 Jan 2020 11:35
URI:	http://eprints.iisc.ac.in/id/eprint/64353

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