Radar receiving device and radar including such a device

Details Radar receiving device and radar including such a device Radar receiving device and radar including such a device

1985-07-24

1990-06-26

Tarcza, Thomas H.

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

With particular circuit

Digital processing

342196, 342162, 342101, 342100, G01S 13526

Patent

active

049375830

ABSTRACT:
Radar apparatus for processing a received signal having a carrier frequency f.sub.0 includes means for directing the received signal in parallel into first and second channels. A first filter in the first channel bandpass filters the received signal and is centered at a frequency f.sub.1 equal to f.sub.0 +.DELTA..sub.1 f. The first filter provides an output signal having a central frequency f.sub.0 +.DELTA..sub.1 f/2. A second filter coupled in the second channel bandpass filters the received signal and is centered at f.sub.2 =f.sub.0 +.DELTA..sub.2 f. The second filter thus provides an output signal having a central frequency f.sub.0 +.DELTA..sub.2 f/2. A first mixer in the first channel mixes the first filter output with a signal f.sub.1 =f.sub.0 +.DELTA..sub.1 f/2 to extract the carrier frequency of the first channel. Likewise, a second mixer in the second channel mixes the second filter output signal with a signal f.sub.2 =f.sub.0 +.DELTA..sub.2 f/2 to also extract the carrier frequency in the second channel. The ouputs of both mixers are then passed to a processing and exploitation device to manipulate the signals to arrive at the appropriate range and/or velocity information.

REFERENCES:
patent: 3898658 (1975-08-01), Jensen et al.
patent: 4188628 (1980-02-01), Langeraar et al.
patent: 4207624 (1980-06-01), Dentino et al.
patent: 4225864 (1980-09-01), Lillington
patent: 4400700 (1983-08-01), Rittenbach
patent: 4483017 (1984-11-01), Hampel et al.
Gerlach, "Radar Doppler Processing Using A Fast Orthogonalization Network", U.S. Statutory Invention Registration #H108, Aug. 5, 1986.

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