Time-domain oversampled orthogonal signal-division multiplexing underwater acoustic communications

Time-domain oversampled orthogonal signal-division multiplexing underwater acoustic communications

Han, J. (Northwestern Polytechnical University)
Wang, Yujie (Northwestern Polytechnical University)
Zhang, Lingling (Northwestern Polytechnical University)
Leus, G.J.T. (TU Delft Signal Processing Systems)

2019

Orthogonal signal-division multiplexing (OSDM) is a recently emerging modulation scheme which, compared to conventional orthogonal frequency-division multiplexing, can effectively lower the peak-to-average power ratio and introduce intra-vector frequency diversity. In this paper, a time-domain oversampled OSDM system for underwater acoustic (UWA) communications is designed, where each OSDM vector is equivalently transmitted over multiple virtual channels, and thus an enhanced frequency diversity gain can be achieved. Moreover, at the receiver, zero vectors and frequency-shifted Chu sequences are used for Doppler compensation and channel estimation, respectively, while low-complexity per-vector equalization is performed based on the composite channel matrix factorization. Finally, the performance of the proposed OSDM system is evaluated through both numerical simulations and a short-range field experiment, and its effectiveness over time-varying UWA channels is confirmed.

http://resolver.tudelft.nl/uuid:2837149c-3d1c-4ff7-b573-675e3a7bf91e

https://doi.org/10.1121/1.5087131

2019-07-22

0001-4966

The Journal of the Acoustical Society of America, 145 (1), 292-300

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2019 J. Han, Yujie Wang, Lingling Zhang, G.J.T. Leus