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Performance Analysis on Code-Division Multiple Access in Underwater Acoustic Sensor Network  

Seo, Bo-Min (경북대학교 전자전기컴퓨터공학부 이동통신 연구실)
Cho, Ho-Shin (경북대학교)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.9A, 2010 , pp. 874-881 More about this Journal
Abstract
Acoustic signal, which is a main carrier of underwater communication, attenuates along the traveled path heavily depending on the frequency as well as inter-node distance. In addition, since it has a long propagation delay, the conventional medium access control (MAC) schemes requiring complex signaling procedures and accordingly heavy overhead messages would not be appropriate in underwater communications. In this paper, we propose a code division multiple access (CDMA) scheme as a solution for MAC of underwater communication and evaluate the performance. A hierarchical data-gathering tree topology is considered and a staggered wake-up pattern is employed for the purpose of energy saving. As a performance measure, the data rate at each level of hierarchical topology is derived.
Keywords
underwater; acoustic sensor networks; CDMA; MAC; tree-topology;
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