Echo Splitting in Linear FM Doppler Ranging Systems.

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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

Author(s):
Cleary, Francis P.
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Descriptive Note:
Master's thesis,
Pagination:
0064

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*TARGET DISCRIMINATION, DISTORTION), (*RANGE FINDING, DOPPLER SYSTEMS), FREQUENCY MODULATION, LINEAR SYSTEMS, FUNCTIONS(MATHEMATICS), CODING, PULSE COMPRESSION, SONAR SIGNALS, RADAR SIGNALS
Field(s)/Group(s):
Cybernetics, Acoustic Detection and Detectors, Active and Passive Radar Detection and Equipment
Keyword(s):
AMBIGUITY FUNCTIONS, CHIRP CODING, MOST PROJECT 4
Report Date:
1968 Sep 01