Accession Number : AD0844090
Title : Echo Splitting in Linear FM Doppler Ranging Systems.
Descriptive Note : Master's thesis,
Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Personal Author(s) : Cleary, Francis P.
Report Date : SEP 1968
Pagination or Media Count : 64
Abstract : Echo splitting is a phenomenon that produces difficulties in estimating target range and speed for radar and sonar systems. It occurs when more than one returned pulse is received from a single target for each transmitted pulse. This thesis investigates the effects of echo-splitting distortion of a linear frequency modulated (chirp) signal. An ambiguity function is proposed for both narrow-band and wideband analysis of multiple and overlapping target returns. The double echo situation is examined in detail and equations are developed for both the narrow-band and wideband cases. Finally, using typical sonar parameters, sample computer drawn plots of these ambiguity functions are presented. (Author)
Descriptors : (*TARGET DISCRIMINATION, DISTORTION), (*RANGE FINDING, DOPPLER SYSTEMS), FREQUENCY MODULATION, LINEAR SYSTEMS, FUNCTIONS(MATHEMATICS), CODING, PULSE COMPRESSION, SONAR SIGNALS, RADAR SIGNALS.
Subject Categories : Cybernetics
Acoustic Detection and Detectors
Active & Passive Radar Detection & Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE