DocumentCode :
1218729
Title :
Detection Outage and Detection Diversity in a Homogeneous Distributed Sensor Network
Author :
Kim, Hyoung-Soo ; Wang, Jing ; Cai, Peili ; Cui, Shuguang
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ
Volume :
57
Issue :
7
fYear :
2009
fDate :
7/1/2009 12:00:00 AM
Firstpage :
2875
Lastpage :
2881
Abstract :
The distributed detection problem over a binary target is considered with wireless sensors sending local decisions to a fusion center over slow-fading orthogonal multiple access channels, where the J-divergence between the distributions under different hypotheses is used as the performance criterion. Given the slow-fading channels between the sensors and the fusion center, two new concepts called detection outage and detection diversity are introduced to quantify the long-term system performance, where the detection outage probability is defined as the probability that the instantaneous J-divergence is smaller than a certain threshold. Based on the detection outage probability, detection diversity order is defined as the slope of the outage probability curve (versus system power consumption) when things are plotted in logarithm domain. It is shown that even with a simple uniform transmission strategy, full detection diversity can be achieved on the order of K with K the total number of sensors in the network. We further show that if the transmission power is optimized across sensors, an adaptive power gain can be achieved in addition to the full diversity gain.
Keywords :
fading channels; multi-access systems; object detection; probability; sensor fusion; wireless sensor networks; J-divergence; binary target; detection diversity; distributed detection outage probability; fusion center; slow-fading orthogonal multiple access channel; transmission strategy; wireless sensor network; Detection; diversity; optimal power allocation; outage probability;
fLanguage :
English
Journal_Title :
Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1053-587X
Type :
jour
DOI :
10.1109/TSP.2009.2020037
Filename :
4808244
Link To Document :
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