Title :
Channel Coding for Underwater Acoustic Communication System
Author :
Goalic, André ; Trubuil, Joël ; Beuzelin, Nicolas
Author_Institution :
ENST, Brest
Abstract :
GESMA (Groupe d´Etudes Sous-Marines de l´Atlantique) objective is to develop a sufficiently robust acoustic link allowing the transmission of different information (text, images...). A real-time platform named TRIDENT (TRansmission d´Images et de Donnes EN Temps reel) was designed at ENST Bretagne. A blind spatio-temporal equalizer is used to reduce the various perturbations brought by the underwater acoustic channel (UWA). The acoustic link performances was evaluated and shown its robustness for transmission in a strongly disturbed channel. GESMA also wants to increase the link reliability and provides strongly protected low bit rate speech (MELP, 2400 bps) transmission. In order to do so, a channel coding will be added to the system. Different kinds of error correcting scheme will be tested including Convolutional Codes (CC) and Reed Solomon (RS) block code. A Differential Phase-Shift Keying (DPSK) is used to solve phase ambiguities in case of CC coding and Viterbi decoding utilization
Keywords :
blind equalisers; convolutional codes; differential phase shift keying; error correction codes; underwater acoustic communication; Convolutional Codes; DPSK; Differential Phase-Shift Keying; ENST Bretagne; GESMA; Groupe d´Etudes Sous-Marines de l´Atlantique; Reed Solomon; TRIDENT; TRansmission d´Images et de Donnes EN Temps reel; Viterbi decoding utilization; acoustic link; acoustic link performances; blind spatio-temporal equalizer; channel coding; error correcting scheme; information transmission; link reliability; real-time platform; underwater acoustic communication system; Bit rate; Channel coding; Equalizers; Error correction codes; Performance evaluation; Protection; Robustness; Speech; Testing; Underwater acoustics; BER (Bit Error Rate); Channel coding; Convolutional code; MELP (Mixed Error Linear Prediction); Reed Solomon code; Underwater acoustic communication;
Conference_Titel :
OCEANS 2006
Conference_Location :
Boston, MA
Print_ISBN :
1-4244-0114-3
Electronic_ISBN :
1-4244-0115-1
DOI :
10.1109/OCEANS.2006.307093
