Journal
IEEE INTERNET OF THINGS JOURNAL
Volume 8, Issue 11, Pages 9059-9071Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JIOT.2021.3056325
Keywords
Distributed detection (DD); generalized-likelihood ratio test; Internet of Things (IoT); locally optimum detection (LOD); Rao test; wireless sensor networks (WSNs)
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This article addresses the issue of distributed detection of a noncooperative target with a wireless sensor network, using one-bit sensor measurement quantization and investigating two quantization strategies. The proposed approaches, including Rao and locally optimum detection tests, show promising performance in simulation results.
In this article, we address the problem of distributed detection of a noncooperative (unknown emitted signal) target with a wireless sensor network. When the target is present, sensors observe a (unknown) deterministic signal with attenuation depending on the unknown distance between the sensor and the target, multiplicative fading, and additive Gaussian noise. To model energy-constrained operations within Internet of Things, one-bit sensor measurement quantization is employed and two strategies for quantization are investigated. The fusion center receives sensor bits via noisy binary symmetric channels and provides a more accurate global inference. Such a model leads to a test with nuisances (i.e., the target position x(T)) observable only under H-1 hypothesis. Davies' framework is exploited herein to design the generalized forms of Rao and locally optimum detection (LOD) tests. For our generalized Rao and LOD approaches, a heuristic approach for threshold optimization is also proposed. The simulation results confirm the promising performance of our proposed approaches.
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