DocumentCode :
1516741
Title :
Radar detection in multipath
Author :
Wilson, S.L. ; Carlson, B.D.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Volume :
146
Issue :
1
fYear :
1999
fDate :
2/1/1999 12:00:00 AM
Firstpage :
45
Lastpage :
54
Abstract :
An analysis of the detection of radar targets in multipath environments is presented. Radar targets often undergo enhancements or fades due to multipath where the direct-path energy combines with a phase-shifted reflection to enhance or reduce the received energy. This phenomenon is a function of frequency. Radars are often designed to avoid the problems of fades by changing frequency or using an assortment of frequencies in an M-out-of-N detector. To understand the detection statistics and choose M and N, the probability density function (PDF) of the noise plus the target times the multipath propagation factor must be known. This PDF is derived for a nonfluctuating target and for a Rayleigh target. The PDF is used to show the benefits of choosing the best M for a multipath environment compared to using the M that would be chosen in a free-space environment
Keywords :
electromagnetic wave reflection; multipath channels; noise; probability; radar detection; PDF; Rayleigh target; detection statistics; direct-path energy; enhancements; fades; free-space environment; frequency; multipath environments; multipath propagation factor; noise; nonfluctuating target; phase-shifted reflection; probability density function; radar target detection; received energy;
fLanguage :
English
Journal_Title :
Radar, Sonar and Navigation, IEE Proceedings -
Publisher :
iet
ISSN :
1350-2395
Type :
jour
DOI :
10.1049/ip-rsn:19990264
Filename :
768738
Link To Document :
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