Coherent pulse radar system
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
Nov 29, 1984
filing date -
Nov 29, 1984
priority date (Note) -
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Abstract
A coherent, frequency agile pulse radar system in which each transmitted pulse is made up of subpulse pairs having frequencies of .omega..sub.o.+-..DELTA..sub.i forces a jammer to broadband jam the system in order to ensure jamming the actual operating frequency of the system. On reception, a separate receiver channel is utilized for the detection of each subpulse frequency. Within the processing system, the signal return for a subpulse having a frequency of .omega..sub.o +.DELTA..sub.l is multipled times the signal return for the subpulse having a frequency of .omega..sub.o -.DELTA..sub.l to provide a combined signal which is free of the offset frequencies. This combined signal is a standard coherent frequency agile pulse doppler radar signal with the exception that the carrier frequency and the doppler frequency are both doubled. Moving target indicating or doppler processing may be used. N-time-around range ambiguities can be eliminated and sensitivity time control can be used to remove close-in clutter without limiting the pulse repetition rate.
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