期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2020
卷号：98
期号：24
页码：4181-4199
出版社：Journal of Theoretical and Applied
摘要：Underwater acoustic communication networks (UWAN) have recently attracted much attention in the research community. Error control coding one of the primary building blocks in underwater MODEMs plays a vital role in achieving better Bit Error Rate (BER) performances. In this paper, Adaptive Turbo Decoder (ATD) algorithm is designed by considering Adaptive Viterbi Decoder (AVD) customized for underwater acoustic MODEM applications. The ATD module is designed with four parallel processing architectures to perform message decoding, multipath computing, branch metric unit (BMU), and Add-Compare-Select (ACS) operations. The designed ATD is modelled in MATLAB and evaluated for its BER performance considering Rayleigh and Rician channels demonstrating improvement in BER over 10-4. The ATD module is further coded in Verilog HDL and verified for its functionality considering different test-vectors and implemented on Virtex FPGA optimizing Area, Power, and Timing requirements.
