Doppler compensation for D-STBC coded time-varying underwater acoustic channels
Author | Daoud, Saed |
Author | Karakaya, Bahattin |
Author | Ghrayeb, Ali |
Available date | 2021-03-25T08:55:16Z |
Publication Date | 2016 |
Publication Name | IEEE Wireless Communications and Networking Conference, WCNC |
Resource | Scopus |
ISSN | 15253511 |
Abstract | In this paper we investigate the performance of distributed space-time block coding (D-STBC) orthogonal frequency division multiplexing (OFDM) over underwater acoustic (UWA) channels. In particular, we consider a relaying system consisting of one source, two relays, and one destination. The relays operate in amplify-and-forward (AF) mode. The underlying channels are assumed to be time-varying frequency selective channels, where the only source of time variation is the relative motion between transceivers. Alamouti D-STBC scheme is used in the second hop, and a two stage receiver is adopted at the destination: in the first stage, multiple resampling (MR) preprocessing of the received signals is performed to minimize the effect of intercarrier interference (ICI), and in the second stage ICI equalization is performed in the frequency domain to further reduce the effect of the residual ICI. To further boost the performance, successive interference cancellation (SIC) is used, where the estimates of the signals at the output of the ICI equalizer are used as tentative decisions. Compared to the single resampling (SR) front end preprocessing, simulation results show the superiority of MR front-end receiver. Also, SIC further boosts the performance, but still, there is a significant gap with respect to the ICI-free limit, when the receiver has perfect knowledge of ICI coefficients and eliminates them completely. |
Language | en |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Subject | Amplify-and-forward Doppler scaling equalization intercarrier interference resampling |
Type | Conference Paper |
Pagination | 821-826 |
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Electrical Engineering [2568 items ]