Repeater for a same frequency with spillover measurement

Details Repeater for a same frequency with spillover measurement Repeater for a same frequency with spillover measurement

1986-12-10

1988-10-04

Griffin, Robert L.

Telecommunications

Carrier wave repeater or relay system

Transmitter/receiver feedback compensation

455 10, 455 52, H04B 715, H04B 702

Patent

active

047760320

ABSTRACT:
The system for measuring the spillover signal from a transmitter to a receiver in a same frequency repeater or a booster has a frequency conversion device which slightly offsets the transmission frequency from the reception frequency, and a signal detector which measures the offset frequency component in the reception signal. The offset frequency is around 100 Hz, which is higher than the fading frequency, and low enough not to affect the operation of receivers. The measured spillover level is used to control the gain of the repeater, and/or to cancel the spillover signal, so that the repeater has the maximum gain without suffering from oscillation.

REFERENCES:
patent: 3448383 (1969-06-01), Starzec et al.
patent: 3696429 (1972-10-01), Tressa
patent: 4317217 (1982-02-01), Davidson
patent: 4383331 (1983-05-01), Davidson
patent: 4475243 (1984-10-01), Batlivala et al.
patent: 4475246 (1984-10-01), Batlivala et al.
patent: 4493111 (1985-01-01), Ganem
patent: 4725842 (1988-02-01), Mayberry
Anaren, Microwave Components Catalog.
Cell Enhancer: Beyond the Outer Limits, Cellular Business, Rosenbloom et al, Kuly, 1986, pp. 40 and 42.
The Cell Enhancer, IEEE, Quinn, 1986, pp. 77-83.

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