G - Physics
01
S
343/60
G01S 7/28 (2006.01) G01S 7/34 (2006.01) G01S 13/24 (2006.01) G01S 13/30 (2006.01)
Patent
CA 1131331
CANADIAN ABRIDGEMENT The invention principally concerns marine radar systems and seeks to reduce "sea clutter". The radar transmitter is arranged to transmit a set of four pulses forming two pairs of pulses in which the pulses of a pair are time spaced by the radar interpulse period and frequency spaced by the reciprocal radar pulse length. The pairs of pulses are frequency and time spaced by several times the frequency and time spacing of the two pulses in a pair. Transmission takes place from a rotatable antenna which exhibits squint and the antenna is rotated at a rate which having regard to the squint effect and the time separation of the pulses is such that all of the four pulses irradiate the same areas in the plane of rotation of the antenna. This renders possible signal processing in the radar receiver to achieve both frequency and time decorrelation of clutter.
308084
Kirby Eades Gale Baker
Marconi Company Limited (the)
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