Accession Number : ADA114985

Title :   Suppression of Second Time Around Radar Returns Using PRI Modulation.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Gerlach,Karl ; Andrews,G A

PDF Url : ADA114985

Report Date : 13 May 1982

Pagination or Media Count : 16

Abstract : It is shown that a modulated or staggered PRI radar system can offer considerable improvement over a nonstaggered radar system in rejecting second time around returns which cause false alarms. This improvement is a function of the number of staggered PRI, the quiescent false alarm number, the Swerling number of the false return, the transmitted signal power, the second time around noise power, and the quiescent noise power of the radar. Small changes in transmitted signal power can be traded-off with the quiescent false alarm number to significantly suppress the bogus return. In addition for all other parameters being equal, if the second time around return is a Swerling case II or IV target, then there is an optimum number of staggered PRI that can be chosen to minimize the likelihood of detection of the second time around return. (author)

Descriptors :   *Radar interference, *False targets, *Radar pulses, Pulse modulation, Frequency, Repetition rate, False alarms, Rejection, Detection, Power spectra, Noise(Radar), Suppression

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE