Reduction of bit‐error rates by adaptive equalization for a 500‐kbit/s underwater acoustic communication system

1988 ◽  
Vol 84 (S1) ◽  
pp. S51-S51
Author(s):  
Shinji Yauchi ◽  
Akio Kaya
Keyword(s):  
Acoustic Communication ◽  
Communication System ◽  
Error Rates ◽  
Adaptive Equalization ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Bit Error Rates

scholarly journals Parallel Resampling of OFDM Signals for Fluctuating Doppler Shifts in Underwater Acoustic Communication

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Shingo Yoshizawa ◽  
Takashi Saito ◽  
Yusaku Mabuchi ◽  
Tomoya Tsukui ◽  
Shinichi Sawada
Keyword(s):  
Conventional Method ◽  
Acoustic Communication ◽  
Orthogonal Frequency Division Multiplexing ◽  
Carrier Frequency Offset ◽  
Autonomous Underwater Vehicles ◽  
Underwater Vehicles ◽  
Error Rates ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Parallel Resampling

Reliable underwater acoustic communication is demanded for autonomous underwater vehicles (AUVs) and remotely operated underwater vehicles (ROVs). Orthogonal frequency-division multiplexing (OFDM) is robust with multipath interference; however, it is sensitive to Doppler. Doppler compensation is given by two-step processing of resampling and residual carrier frequency offset (CFO) compensation. This paper describes the improvement of a resampling technique. The conventional method assumes a constant Doppler shift during a communication frame. It cannot cope with Doppler fluctuation, where relative speeds between transmitter and receiver units are fluctuating. We propose a parallel resampling technique that a resampling range is extended by measured Doppler standard deviation. The effectiveness of parallel resampling has been confirmed in the communication experiment. The proposed method shows better performance in bit error rates (BERs) and frame error rates (FERs) compared with the conventional method.

Channel Coding for Underwater Acoustic Communication System

OCEANS 2006 ◽  
2006 ◽  
Author(s):  
Andre Goalic ◽  
Joel Trubuil ◽  
Nicolas Beuzelin
Keyword(s):  
Acoustic Communication ◽  
Communication System ◽  
Channel Coding ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic
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