Closed loop bi-directional broadband Doppler compensation and channel equalization for single carrier high-speed underwater acoustic communication

2015 ◽  
Author(s):  
Youwen Zhang ◽  
Lu Liu ◽  
Dajun Sun ◽  
Xin Liu ◽  
Hongyu Cui ◽  
...  
Keyword(s):  
Acoustic Communication ◽  
High Speed ◽  
Closed Loop ◽  
Channel Equalization ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Single Carrier ◽  
Doppler Compensation

Experimental Study of Long-Range Shallow Water Acoustic Communication Based on OFDM-Modem

2012 ◽  
Vol 546-547 ◽  
pp. 1308-1313 ◽  
Author(s):  
Gang Qiao ◽  
Song Zuo Liu ◽  
Feng Zhou ◽  
Zong Xin Sun
Keyword(s):  
Experimental Study ◽  
Acoustic Communication ◽  
Channel Equalization ◽  
Underwater Acoustic Communication ◽  
Frequency Diversity ◽  
Shallow Sea ◽  
Underwater Acoustic ◽  
Sea Trial ◽  
Communication Distance ◽  
Compensation Channel

In this paper, we focus on the need for remote and robust underwater acoustic(UWA) communication in shallow sea. A set of OFDM underwater acoustic communication algorithm is designed including the techniques of Doppler estimation and compensation, channel equalization and frequency diversity. This algorithm is realized in the DSP and successfully applied on the OFDM-Modem platform. In Da- Lian shallow sea trial, the horizontal communication distance is 36 kilometers under the condition of QPSK modulation, 1/2 rate convolution code, bandwidth between 4 and 8kHz. The communication rate of the OFDM-Modem can reach 426bps and the ultimate BER is less than 10-3.

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