Pulse doppler radar system

Details Pulse doppler radar system Pulse doppler radar system

1989-04-12

1990-04-24

Tarcza, Thomas H.

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

Determining distance

With frequency modulation

342128, 342192, G01S 1334

Patent

active

049203479

ABSTRACT:
A pulse doppler radar system for measuring the range to a target. The radar system alternately transmits a signal having a constant frequency and a signal modulated by a linearly-changing-frequency and receives an echo signal from a target. When a plurality of doppler frequencies derived from jet engine modulation are detected in the echo signal, the radar system is operable to obtain the number of frequency differences giving the same range value on the basis of the differences between the detected doppler frequencies, or to selectively use methods of range calculation according to the number of detected doppler frequencies.

REFERENCES:
patent: 3149326 (1964-09-01), Naidich
patent: 3889261 (1975-06-01), Sirven
patent: 4536764 (1985-08-01), Freeman
Skolnik, "Radar Handbook", pp. 16-25-16-26, 1970, McGraw Hill.

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