One frequency repeater for a digital radio system

Details One frequency repeater for a digital radio system One frequency repeater for a digital radio system

1986-09-18

1988-12-06

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

455 24, 178 70S, H04B 715

Patent

active

047899930

ABSTRACT:
A one frequency repeater includes a receiver for receiving a reception signal through a receiving antenna, a variable frequency characteristic filter for generating a signal for cancelling an interference signal caused by leakage of a transmission signal into a receiving antenna, an adder for adding the interference signal and the reception signal, a demodulator for demodulating an output signal from the adder, a data converter for converting an output signal from the modulator, a modulator for modulating a carrier according to an output from the data converter, and a transmitter for transmitting from a transmitting antenna an output signal modulated by the modulator. The variable frequency characteristic filter receives the signal modulated by the modulator, is controlled in response to a control signal including the output from the data converter, and supplies the interference cancellation signal to the adder.

REFERENCES:
patent: 4406016 (1983-09-01), Abrams et al.
patent: 4464545 (1984-08-01), Werner
patent: 4475243 (1984-10-01), Batlivala et al.
patent: 4520476 (1985-05-01), Searl
patent: 4701935 (1987-10-01), Namiki

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