Method and device for monitoring a mobile telephone repeater

Details Method and device for monitoring a mobile telephone repeater Method and device for monitoring a mobile telephone repeater

1997-03-04

1999-12-28

Trost, William G.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455571, H04Q 720

Patent

active

060093242

ABSTRACT:
A method and device for monitoring a mobile telephone repeater are disclosed. The repeater is of the kind comprising an uplink (100) and a downlink (200) between two antennas (1, 2), wherein the repeater receives, amplifies and retransmits signals between a base station and a mobile telephone. A stability test is performed automatically, whereby a possible continuous and strong signal, being caused either by an instability involving a positive feedback between the two antennas or by a disturbing signal, is detected, whereupon the amplifying gain is adjusted in response to the result of the stability test. The test criterion includes the step of checking whether the level of the input signal in the respective amplifier chain exceeds a threshold value during at least a major portion of a measuring period.

REFERENCES:
patent: 4776032 (1988-10-01), Odate et al.
patent: 5095528 (1992-03-01), Leslie et al.
patent: 5115514 (1992-05-01), Leslie
patent: 5450620 (1995-09-01), Vaisanen
patent: 5551067 (1996-08-01), Hulkko et al.
patent: 5812933 (1998-09-01), Niki
Patent Abstracts of Japan, Abstract of JP,A,63-79429 (Nippon Telegr & Telph Corp.), Apr. 9, 1988.
Patent Abstracts of Japan, Abstract of JP,A,1-62926 (Nippon Telegr & Teleph Corp.), Mar. 9, 1989.

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