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Title: Evaluation of the sensitivity and limits of the passive acoustic ranging algorithm for single and multiple helicopters
Authors: IIT Research Institute.
Carnes, Benny L.
Morgan, John C.
Keywords: Acoustics
Passive detection and ranging
Signal processing
Doppler effect
Military reconnaissance
Issue Date: Mar-1995
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-95-8.
Description: Technical Report
Abstract: Passive acoustic ranging (PAR), based on acoustic Doppler shifts, has been proposed as a suitable method for extracting velocity and range information from a source which emits a time-dependent acoustic signal. Operational constraints on the PAR method were evaluated and estimates were made of the limitations of realistic operation under various environmental conditions. In addition, performance of the PAR method was evaluated for multiple helicopters. Several methods of analysis of signals were tested to determine the optimum method for field implementation. It was found that additional information gained from preprocesssing with an artificial neural network would enable the analysis to process a signal from multiple moving sources and enhance the response time of the system.
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