Research on Doppler and Channel Estimation for Multicarrier Spread Spectrum Underwater Acoustic Communication System

Yuan Wang; Zhou Mo Zeng; Yi Bo Li; Wen Zhang; Hao Feng

doi:10.4028/www.scientific.net/AMR.1079-1080.752

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1079-1080Research on Doppler and Channel Estimation for...

Research on Doppler and Channel Estimation for Multicarrier Spread Spectrum Underwater Acoustic Communication System

Abstract:

Spreadspectrum orthogonal frequency-division multiplexing (SS-OFDM), which appliesspread spectrum technique into OFDM, performs robustly in severely multipathfading underwater channels. However, this technology is sensitive to thefrequency shift. Furthermore, communication in underwater acoustic (UWA)channels is more vulnerable to Doppler effect than other wireless channels dueto the low speed of acoustic signal propagation. It presents challenges forcommunication between underwater mobile nodes. Therefore, accurate Dopplerfrequency shift estimation and compensation is important. Aself-designed receiver structure for SS-OFDM system including a novel Dopplerscale estimation method and channel estimation via compressed sensing method isproposed. The simulation and experimental results offer strong proofs for ourscheme to be a viable option for acoustic communication between underwatermobile nodes and compressed sensing method outperforms the conventionalleast-squares (LS) method in channel estimation.

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Periodical:

Advanced Materials Research (Volumes 1079-1080)

Pages:

752-756

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1079-1080.752

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Online since:

December 2014

Authors:

Yuan Wang*, Zhou Mo Zeng, Yi Bo Li, Wen Zhang, Hao Feng

Keywords:

Channel Estimation, Compressed Sensing, Doppler Compensation, Underwater Communication

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* - Corresponding Author

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