Method of resolving closely spaced targets

Details Method of resolving closely spaced targets Method of resolving closely spaced targets

1985-08-16

1987-02-24

Tubbesing, T. H.

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

Determining direction

Monopulse

342194, G01S 1344

Patent

active

046460950

ABSTRACT:
A method of processing signals received by a four quadrant monopulse antenna to resolve the signals from two sources within the sum beam of such antenna is shown to comprise the steps of: (a) separately quadrature detecting each one of the signals (A, B, C and D) received at each one of the four quadrants to form corresponding complex signals having real (I) and imaginary (Q) terms, each one of such complex video signals being representative of a different one of the signals A, B, C and D; (b) forming the monopulse sum (A+B+C+D) signal, and monopulse difference signals [(A+B)-(C+D)], [(A+C)-(B+D)] and [(A+D)-(B+C)] and the corresponding monopulse ratios; and (c), calculating the monopulse ratios of the two signals that, when extant simultaneously, produce the corresponding monopulse ratios.

REFERENCES:
patent: 3130402 (1964-04-01), Kuck
patent: 4084160 (1978-04-01), Leuenberger et al.
patent: 4136343 (1979-01-01), Heffner et al.
patent: 4219816 (1980-08-01), Schenkel et al.
patent: 4532515 (1985-07-01), Cantrell et al.

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