Receiving circuit

Details Receiving circuit Receiving circuit

1986-01-24

1988-11-22

Blum, Theodore M.

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

Return signal controls radar system

Receiver

342159, 342203, G01S 1300

Patent

active

047869097

ABSTRACT:
In a receiving circuit a control circuit and a direction finding circuit generate a digitally encoded "descriptor" which characterizes pulses of r.f. radiation received in a particular azimuthal direction and having a particular carrier frequency. The "descriptor" may be compared with data stored in a processing circuit representing r.f. pulses emitted by sources which have already been detected or which are known to exist. To reduce the workload on processing circuit a number of emulator circuits generate pulse patterns which simulate pulses produced by known sources of little inherent interest. If the received pulses match the simulated pulses a gate inhibits control circuit.

REFERENCES:
patent: 3686670 (1972-08-01), Callendar et al.
patent: 4008472 (1977-02-01), Nirasawa et al.
patent: 4176357 (1979-11-01), Fales
patent: 4459592 (1984-07-01), Long
patent: 4529985 (1985-07-01), Sawyer et al.
patent: 4630052 (1986-12-01), Galati et al.
patent: 4638319 (1987-01-01), Chua
patent: 4673942 (1987-06-01), Yokoyama

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