Telecommunications – Transmitter and receiver at separate stations
Patent
1993-08-27
1995-07-04
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 383, 455 561, 455 70, H04B 726
Patent
active
054308895
ABSTRACT:
An automatic power control system for a cellular mobile radio system, comprising: a control center via which a plurality of base stations, each serving a cell, are linked to facilitate mutual communication between mobile units which gain access to the cellular mobile radio system via the base stations; at least two mobile units distinguishable by identification codes, the mobile units being arranged to transmit, in addition to an identification code unique to each mobile unit, a data sequence common to each mobile unit, but transmitted by each mobile unit at a nominally different time within each burst; each of said the stations including correlator operative to discriminate between signals from mobile units within its own cell and interfering signals from mobile units in adjacent cells and a data logger; and a data processing unit located at the control center and arranged to merge data from the data loggers located at each of the base stations, which serves to store the results of correlation of the data sequence common to each mobile unit, so that details of relative power levels and times of reception are recorded as these details relate to signals received, the control center including a signal processor responsive to the data logger at each base station for identifying mobile units involved in potentially mutually interfering situations and feeding back instructions as appropriate to each of the base stations whereby power control signals are transmitted to these mobile units over the radio link from the base stations.
REFERENCES:
patent: 4670906 (1976-06-01), Thro
patent: 4811421 (1989-03-01), Havel et al.
patent: 5241690 (1993-08-01), Larsson et al.
patent: 5265119 (1993-11-01), Gilhousen et al.
Chandler David P.
Hulbert Anthony P.
Eisenzopf Reinhard J.
Pham Chi H.
Roke Manor Research Limited
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