Method for reducing equalizer usage in mobile radio communicatio

Details Method for reducing equalizer usage in mobile radio communicatio Method for reducing equalizer usage in mobile radio communicatio

1990-09-06

1993-05-18

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

375 12, 375102, 455 342, 455 561, 455 62, 455 671, 4551613, H04B 726

Patent

active

052128032

ABSTRACT:
A method in a mobile radio station to select one of a number of dedicated control channels (DCCH1-21) which are transmitted from a number of base stations (B1-B21) in a mobile radio system. In the mobile station there is an equalizer to compensate for the multipath propagation characteristics of the radio medium between the mobile station and a certain base station. This equalizer is power consuming and should not be used if not necessary. According to the method an investigation is carried out in the mobile station whether or not the equalizer can be disconnected during the initialization of a call from the mobile to a base station. The signal quality of the dedicated channel (DCCH1) which has the greatest signal strength is measured without the equalizer. If the signal quality is not acceptable, a new detection is made with the use of the equalizer. If the signal quality then is acceptable another detection is made without equalizer on the dedicated control channel (DCCH2) which has the next strongest signal and if this detection revealed an acceptable signal quality the base station (B2) transmitting this control channel is selected by the mobile station for the further call progress.

REFERENCES:
patent: 4829519 (1989-05-01), Scotton et al.
patent: 4852090 (1989-07-01), Borth
patent: 4903320 (1990-02-01), Hanawa
patent: 5065410 (1991-11-01), Yoshida et al.

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