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Development of an FHMA-based Underwater Acoustic Communications System for Multiple Underwater Vehicles
Zixin Zhao, Shuxiang Guo, Nan Xiao
Pages - 61 - 76     |    Revised - 15-03-2012     |    Published - 16-04-2012
Volume - 3   Issue - 2    |    Publication Date - March / April 2012  Table of Contents
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KEYWORDS
Multiple Underwater Vehicles, Underwater Acoustic Communications, Sound Card
ABSTRACT
This paper describes the design of an underwater acoustic communications system for multiple underwater vehicles, based on frequency-hopping multiple-access (FHMA) and tamed spread-spectrum communications. The system makes used of the tamed spread-spectrum method, frequency hopping, 4FSK, and a rake receiver. In order to make the system more practical, the underwater channel and the effect of the number of users on the bit error ratio (BER) are also taken into account. Since the necessary proving experiments are not easily conducted in the ocean, a platform is developed that uses the sound card of a computer, combined with a sound box and microphone, to transduce energy for acoustic communications. Simulated and experimental results indicate that this system could provide reliable underwater communications between multiple underwater vehicles.
CITED BY (1)  
1 Guo, S., Guo, C., & Pang, M. (2013, August). A novel feature extraction method for SEMG signals using image processing. In Mechatronics and Automation (ICMA), 2013 IEEE International Conference on (pp. 1765-1770). IEEE.
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Dr. Zixin Zhao
Department of Intelligent Mechanical Systems Engineering, Kagawa University - Japan
zhao@eng.kagawa-u.ac.jp
Professor Shuxiang Guo
- Japan
Dr. Nan Xiao
- Japan