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Performance of Decentralized Detection in a Resource-constrained Sensor Network with Non-orthogonal Communications

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3 Author(s)
Al Tarzai, K.A. ; Dept. of Electr. & Comput. Eng., Wichita State Univ., KS ; Jayaweera, S.K. ; Aravinthan, V.

The performance of decentralized detection in a resource-limited wireless sensor network is investigated. The system is assumed to be subjected to a total power constraint and all sensors are assumed to perform analog relay-amplifier local processing. Under these assumptions, we show that, we can monotonically improve the fusion performance by using non-orthogonal sensor-to-fusion center communication, as opposed to orthogonal communications. In order to quantify the performance, we employ circulant matrix theory to derive closed-form asymptotic expressions. These asymptotic results allow us to observe the effect of each parameter on the total system performance. Numerical results show that these asymptotics provide a very good approximation to the exact performance, even for a small number of sensors

Published in:

Signals, Systems and Computers, 2005. Conference Record of the Thirty-Ninth Asilomar Conference on

Date of Conference:

Oct. 28 2005-Nov. 1 2005