Paper Title:
Research on the Doppler Shift Mitigation Scheme for OFDM Underwater Acoustic Communication
  Abstract

Doppler shift decreases the estimation accuracy of carrier frequency and may result in divergent estimation. It thus degrades the performance of orthogonal frequency division multiplexing (OFDM) underwater acoustic (UWA) communication system. In this paper, the two-step Doppler shift mitigation scheme[4] was adopted to mitigate the Doppler effect. The innovation lied in the second step in which an enhanced carrier frequency offset (CFO) two-time estimation approach on basis of the pilot was proposed to improve the Doppler shift mitigation scheme. In addition, the new Doppler shift mitigation scheme with the proposed approach was implemented in the OFDM communication system under the simulated multipath-spread channel environment. The experiment results show that the new scheme is able to improve the performance of OFDM UWA communication significantly.

  Info
Periodical
Chapter
Chapter 6: Energy & Electronic
Edited by
Robin G. Qiu and Yongfeng Ju
Pages
820-825
DOI
10.4028/www.scientific.net/AMM.135-136.820
Citation
Q. W. Chang, X. H. Shen, J. Chang, "Research on the Doppler Shift Mitigation Scheme for OFDM Underwater Acoustic Communication", Applied Mechanics and Materials, Vols. 135-136, pp. 820-825, 2012
Online since
October 2011
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