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Journal of Sensors
Volume 2016 (2016), Article ID 2390734, 8 pages
Research Article

A UEP LT Codes Design with Feedback for Underwater Communication

College of Information and Communication Engineering, Harbin Engineering University, Harbin, China

Received 25 March 2016; Accepted 1 August 2016

Academic Editor: Vincenzo Stornelli

Copyright © 2016 Danfeng Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


To satisfy the performance requirement of LT codes with Unequal Erasure Protection (UEP) in underwater environment, the Weighted Expanding Window Fountain (WEWF) code is proposed in this paper. The WEWF codes can achieve strong UEP property by nonuniformly selecting input symbols within each window. To overcome the disadvantages in terms of redundancy in the lower prioritized segments, Correlation Chain Feedback (CCFB) is also introduced to help the transmitter to precisely adjust the encoding scheme. Asymptotic analysis and simulation results demonstrate that the proposed approach can achieve lower symbol error rate and less overall redundancy in the underwater acoustic sensor networks.