Method of and apparatus for detecting a monitoring signal at a b

Details Method of and apparatus for detecting a monitoring signal at a b Method of and apparatus for detecting a monitoring signal at a b

1992-10-05

1994-11-29

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 671, 4552262, 455307, H04B 726

Patent

active

053697855

ABSTRACT:
A method and an apparatus for identification of a monitoring signal at a base station in a radio telephone system, in which a number of monitoring signals having different frequencies are used for monitoring the quality of radio links between the base station and mobile stations. The apparatus includes a multipath-type bandpass filter having an adjustable bandwidth for filtering the monitoring signal, the filter being arranged to be adapted to a desired monitoring signal frequency and the bandwidth of the filter being arranged to be narrowed in a steplike manner during the filtration period. An indicator is provided for identifying the monitoring signal on the basis of the level of the bandpass-filtered signal.

REFERENCES:
patent: 4249261 (1981-03-01), Ogita
patent: 4291414 (1981-09-01), Kinoshita
patent: 4458207 (1984-07-01), Favreau et al.
patent: 4528698 (1985-07-01), Fraser
patent: 4922509 (1990-05-01), Tressetet

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