Abstract
This paper designs an underwater acoustic communication system based on tamed spread spectrum and Frequency Hopping Multiple Access (FHMA) for multiple underwater vehicles. In this system, multiple underwater vehicles can communicate with the console on the water surface simultaneously successfully. The communication system is com-posed of tamed spread spectrum modulation and demodulation, frequency hopping modulation and demodulation with synchronization function, 4FSK modulation and demodulation and Rake Receiver. In order to make the system more feasible, underwater channel and the effect of user number on Bit Error Ratio (BER) are also taken into account. The simulation results indicate that it is feasible to use this system to accomplish underwater communication reliably for multiple users due to the low BER.
Highlights
As more and more attention is paid to the ocean, there are growing interests in exploring and exploiting the ocean these days
This paper designs an underwater acoustic communication system based on tamed spread spectrum and Frequency Hopping Multiple Access (FHMA) for multiple underwater vehicles
In order to solve these problems, this paper proposes an underwater acoustic communication system for multiple underwater vehicles
Summary
As more and more attention is paid to the ocean, there are growing interests in exploring and exploiting the ocean these days. Multiple access based on spread spectrum technique is necessary to realize communication between multiuser. Some researches focusing on high rate of underwater acoustic communication have been made [10,11], but how to put them to use in the situation of multiuser has not been reported yet. Reference [12] proposed a novel multichannel detection technique based on adaptive multichannel receiver to realize high dada rate in multiuser underwater acoustic communication. In order to solve these problems, this paper proposes an underwater acoustic communication system for multiple underwater vehicles. Tamed spread spectrum and FHMA techniques are adopted to deal with the contradiction between the data rate and the limitation of frequency bandwidth. While the data rate is raised, the communication quality still keeps a high level
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