Performance analysis of distributed detection in a random sensor field

Ruixin Niu, Pramod K. Varshney

Research output: Contribution to journalArticle

102 Scopus citations

Abstract

For a wireless sensor network (WSN) with randomly deployed sensors, the performance of the counting rule, where the fusion center employs the total number of detections reported by local sensors for hypothesis testing, is investigated. It is assumed that the signal power decays as a function of the distance from the target. For both the case where the total number of sensors is known and the wireless channels are lossless, and the case where the number of sensors is random and the wireless channels have nonnegligible error rates, the exact system level probability of detection is derived analytically. Some approximation methods are also proposed to attain an accurate estimate of the probability of detection, while at the same time to reduce the computation load significantly. To obtain a better system level detection performance, the local sensor level decision threshold is determined such that it maximizes the system level deflection coefficient.

Original languageEnglish (US)
Pages (from-to)339-349
Number of pages11
JournalIEEE Transactions on Signal Processing
Volume56
Issue number1
DOIs
StatePublished - Jan 1 2008

Keywords

  • Counting rule
  • Decision fusion
  • Distributed detection
  • Wireless sensor networks

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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