METHODOLOGY FOR THE DESIGN AND OPTIMAL PLACEMENT OF POINT DETECTORS IN A DISTRIBUTED DETECTION SYSTEM FOR REMOTE DEFENCE AGAINST BIOLOGICAL WARFARE AGENT RELEASES

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Authors
  1. Yee, E.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN)
Abstract
The report deals with the design and performance evaluation of a distributed detection system for a dispersing biological warfare (BW) cloud embedded in the natural aerosol component of the background air. The distributed system employs a number of physically separated BW agent point detectors (sentries) located within some target region and a data fusion center that provides the final decision as to the presence or absence of the bio-target by combining the individual localized decisions from the various point detectors using a prespecified combining strategy. In this system, each detector implements a generalized likelihood ratio test on its own localized observations to test for the presence or absence of a bio-target. These localized detection decisions are then transmitted to a data fusion center where they are logically combined to yield a global detection decision for the distributed system. The optimization of the global detection performance of the distributed system is derived by application of the Lagrange multipliers method, whereby the global probability of detection for the system is maximized subject to the constraint that the global probability of false alarm is maintained at a prespecified level (viz., at a constant and tolerable false-alarm rate). A number of combining strategies are investigated in order to determine some overall system optimality for detection. TRUNCATED
Keywords
Sensor fusion;Distributed detection;Placement of detectors;Bio-aerosol detection;Point detectors
Report Number
DRES-669 — Technical Report (Final)
Date of publication
01 Feb 1998
Number of Pages
45
DSTKIM No
98-00920
CANDIS No
507744
Format(s):
Hardcopy;Document Image stored on Optical Disk

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