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Distributed Binary Quantizers for Communication Constrained Large-scale Sensor Networks

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4 Author(s)
Ying Lin ; Dept. of Electron. Eng. & Comput. Sci., Syracuse Univ., NY ; Biao Chen ; Willett, P. ; Suter, B.

We consider in this paper local sensor quantizer design for large-scale bandwidth and/or energy constrained wireless sensor networks (WSNs) operating in fading channels. In particular, under the Neyman-Pears on framework, we address the design of binary local sensor quantizers for a binary hypothesis problem in the asymptotic regime where the number of sensors is large. Motivated by the sensor censoring idea for reduced communication rate, each sensor either transmits `1' to a fusion center or remains silent. By adopting energy detector as the fusion rule, we develop a procedure to obtain local sensor threshold that maximizes the Kullback-Leibler distance of the distributions of the fusion statistic under the two hypotheses. The proposed quantizer design is well suited for the emerging large scale resource-constrained WSNs applications. Numerical results based on Gaussian and exponential observations are presented to demonstrate the design procedure

Published in:

Information Fusion, 2006 9th International Conference on

Date of Conference:

10-13 July 2006