Doppler tracking processor and time of closest approach detector

Details Doppler tracking processor and time of closest approach detector Doppler tracking processor and time of closest approach detector

1984-08-30

1987-06-09

Tarcza, Thomas H.

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

Return signal controls radar system

Receiver

342 68, G01S 1308

Patent

active

046723811

ABSTRACT:
Disclosed is a Doppler tracking processor and time of closest approach detector for use in active or semi-active radar-guided missiles. A known processor uses a fractional Doppler gate (FDG) to process the Doppler signal to activate the warhead detonation properly at time of closest approach (TCA); it indicates when the Doppler energy has rolled off to, for example, one-half the pre-intercept Doppler frequency. The present invention uses a Doppler tracking processor and TCA detector. The tracking filter can extract the instantaneous value of the Doppler frequency even during roll-off. The system processes the Doppler from the pre-intercept frequency up to an appropriate fractional frequency occurring at TCA, at which time it provides a signal for use in warhead detonation.

REFERENCES:
patent: 3774213 (1973-11-01), Riggs
patent: 3911438 (1975-10-01), Banks
patent: 3938147 (1976-02-01), Kalmus
patent: 4031534 (1977-06-01), Kallmann et al.
patent: 4140060 (1979-02-01), Brenner
patent: 4290066 (1981-09-01), Butler
patent: 4360812 (1982-11-01), Peperone
patent: 4413531 (1983-11-01), Karplus et al.
"IEEE Standard Dictionary of Electrical and Electronics Terms", p. 197; New York, Wiley-Interscience, 1984.

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