Frequency diversity sidelobe canceller

Details Frequency diversity sidelobe canceller Frequency diversity sidelobe canceller

1975-02-19

1992-11-10

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Directive

Utilizing correlation techniques

342 17, 342159, G01S 1316

Patent

active

051628058

ABSTRACT:
A new system and technique for cancelling interference in frequency agile ceiving systems. Main and auxiliary signals are supplied to a pair of multiple loop side-lobe cancellers which are capable of being tuned to different frequencies. At the same time, under the control of a timing clock, plural frequencies are selected and multiplexed between two channels at the time of a radar pulse transmission. The side-lobe cancellers and radar are coupled to the channels such that each caneller operates at a given frequency for two consecutive pulse periods, with the radar transmitting at said given frequency during the second pulse period. By continuously cycling between the two channels, each canceller is operating at the proper frequency to cancel interference even though the radar is changeing frequency on a pulse to pulse basis.

REFERENCES:
patent: 3202990 (1965-08-01), Howells
patent: 3881177 (1975-04-01), Len et al.

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