Low Power Design of Adaptive Viterbi Decoder

Authors : Sujatha Cyri; Dharmistan K. Varugheese

Volume/Issue : Volume 5 - 2020, Issue 9 - September

Google Scholar : http://bitly.ws/9nMw

Scribd : https://bit.ly/3uPgWwi

Underwater acoustic communication module based on Orthogonal Frequency Division Multiplexing (OFDM) uses rate ½ convolutional encoders and Turbo decoders for error control coding. Turbo decoders are designed with two Viterbi decoders that operate in sequence to improve Log Likelihood Ratio (LLR). The computation complexity of Viterbi decoders limits their use for high speed decoding as the decoders are iterative. In this paper, adaptive Viterbi decoder is designed that is based on novel message decoding logic, branch metric unit and survivor path metric unit. The computation complexity is reduced by replacing the arithmetic and logic unit with Look Up Table (LUT) thus increasing the access time. The adaptive decoder architecture eliminates the iteration process by predicting the state as well as the data and hence is faster in decoding message.

Keywords : Underwater communication, Turbo Codes, OFDM, Viterbi Decoder, FPGA, High Speed


Paper Submission Last Date
31 - August - 2022

Paper Review Notification
In 1-2 Days

Paper Publishing
In 2-3 Days

Never miss an update from Papermashup

Get notified about the latest tutorials and downloads.

Subscribe by Email

Get alerts directly into your inbox after each post and stay updated.

Subscribe by RSS

Add our RSS to your feedreader to get regular updates from us.