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

1988-07-20

1989-09-12

Tarcza, Thomas H.

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

Return signal controls radar system

Receiver

342 68, G01S 1308

Patent

active

RE0330558

ABSTRACT:
Disclosed is a Doppler tracking processor and time of closest approach detector for use in active or semiactive 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 rolloff. The system processes the Doppler from the preintercept 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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