Digital sidelobe canceller

Details Digital sidelobe canceller Digital sidelobe canceller

1977-07-22

1978-04-25

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 77, 343100CL, 325371, G01S 942, H04B 112

Patent

active

040865924

ABSTRACT:
A digital open-loop canceller is used to decorrelate one signal from anot in such applications as coherent sidelobe cancellers and moving target indicators. The invention measures the correlation between a complex main input signal and a complex auxiliary input signal in digital form. It divides the correlation coefficient by the average value of the auxiliary signal magnitude squared, multiplies the ratio by the auxiliary signal and subtracts the result from the main input signal to cancel correlated components.

REFERENCES:
patent: 3177489 (1965-04-01), Saltzberg
patent: 3202990 (1965-08-01), Howells
patent: 3290684 (1966-12-01), Renn et al.
patent: 3355736 (1967-11-01), Perper
patent: 3881177 (1975-04-01), Len et al.
patent: 3916408 (1975-10-01), Evans et al.
patent: 3938153 (1976-02-01), Lewis et al.
patent: 3938154 (1976-02-01), Lewis
patent: 3978483 (1976-08-01), Lewis et al.
patent: 3982245 (1976-09-01), Soule, Jr. et al.
patent: 4044359 (1977-08-01), Applebaum et al.

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