A Comprehensive Study of Event Detection in WPCN Networks with Noisy Measurements

Sensors

Evangelos Zervas¹  Michael Koutsioumpos²  Efstathios Hadjiefthymiades²  Lazaros Merakos² 

[1] Department of Electrical and Electronics Engineering, University of West Attica, 12244 Egaleo, Greece;Department of Informatics and Telecommunications, National and Kapodistrian University of Athens, Panepistimioupolis, Ilissia, 15772 Athens, Greece;

关键词: WPCN;    optimal stopping;    mmWave sensor network;   

DOI  :  10.3390/s22062163

来源: DOAJ

【 摘 要 】

Various aspects of the detection of events in wireless powered communication networks (WPCN) are studied and analyzed under the assumption of highly noisy sensor measurements. In WPCN, networks sensor nodes’ stored energy is a scarce resource and must be treated sparingly. Frequent false alarm detections force superfluous transmissions, thus depleting nodes’ energy storage. This has an adverse effect on the probability of successful transmission of the information message and its delay in case of a true positive detection. In this work, the detection problem is approached using an optimal stopping framework, where the involved likelihoods are highly unstable due to the noisy measurements. A classical AR filter is adopted in order to smooth the posterior likelihoods prior to their usage in the detection phase and its performance is contrasted to that of a novel Beta Particle Filter smoother. The effects of the smoothing filters on the achieved false alarm rate and detection delay are examined using numerical and simulation results. Moreover, the assessment of the detection process takes into account critical WPCN parameters, such as the charging efficiency and the location of the sensors, thus aiding the system design.

【 授权许可】

Unknown