Fusion in sensor networks with communication constraints
Proceedings of the 3rd international symposium on Information processing in sensor networks
On Distributed Fault-Tolerant Detection in Wireless Sensor Networks
IEEE Transactions on Computers
Energy-driven detection scheme with guaranteed accuracy
Proceedings of the 5th international conference on Information processing in sensor networks
IEEE/ACM Transactions on Computational Biology and Bioinformatics (TCBB)
Decentralized detection in IEEE 802.15.4 wireless sensor networks
EURASIP Journal on Wireless Communications and Networking - Special issue on signal processing-assisted protocols and algorithms for cooperating objects and wireless sensor networks
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We present a technique to find the optimal threshold τ for the binary hypothesis detection problem with n identical and independent sensors. The sensors all use an identical and single threshold τ to make local decisions, and the fusion center makes a global decision based on the n local binary decisions. For generalized Gaussian noise and some non-Gaussian noise distributions, we show that for any admissible fusion rule, the probability of error is a quasi-convex function of threshold τ. Hence, the problem decomposes into a series of n quasi-convex optimization problems that may be solved using well-known techniques. Assuming equal a priori probability, we give a sufficient condition of the non-Gaussian noise distribution g(x) for the probability of error to be quasi-convex. Furthermore, this technique is extended to Bayes risk and Neyman-Pearson criteria. We also demonstrate that, in practice, it takes fewer than twice as many binary sensors to give the performance of infinite precision sensors in our scenario