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Channel estimation based on compressed sensing in high-speed underwater acoustic communication

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Open access
Authors
Guo, S.
He, Z.
Jiang, W.
Ou, Y.
Niu, K.
Rong, Yue
Caley, Michael
Duncan, Alec
Date
2013
Type
Conference Paper

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Guo, Sichuan and He, Zhiqiang and Jiang, Weipeng and Ou, Yuanbiao and Niu, Kai and Rong, Yue and Caley, Michael and Duncan, Alec J. 2013. Channel estimation based on compressed sensing in high-speed underwater acoustic communication, in Proceedings of the 9th International Conference on Information, Communications and Signal Processing, Dec 10-13 2013. Tainan, Taiwan: IEEE.
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Proceedings of the 9th International Conference on Information, Communications and Signal Processing
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9th International Conference on Information, Communications and Signal Processing
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Abstract

The underwater acoustic (UA) channel is dispersive in both time and frequency with severe frequency-dependent signal attenuation. Efficient channel estimation and tracking are crucial to coherent high-rate UA communication. In this paper, we propose a new compressed sensing (CS) based channel estimation method with block-by-block channel tracking for UA communication. Compared with conventional channel estimation algorithms, the proposed method efficiently exploits the sparsity of the UA channel, and improves the channel tracking capability of UA communication system. The proposed algorithm was tested during our UA communication experiment conducted in December 2012 in the Indian Ocean off Rottnest Island, Western Australia. At a data rate of 8 kbps (QPSK constellations), average uncoded bit-error-rates (BERs) of 3% and 14% have been achieved over 1 km and 6 km ranges, respectively, using MMSE equalization based on the proposed channel estimation and tracking method.