Terminal station which does not cause an interruption of communi

Details Terminal station which does not cause an interruption of communi Terminal station which does not cause an interruption of communi

1994-12-21

1997-04-29

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 561, 455133, 375347, H04B 702, H04B 726

Patent

active

056258747

ABSTRACT:
For preventing a mobile radio terminal station from causing an interruption of communication on changing of a communication system, a receiving apparatus receives a main and a supplementary modulated signal at a boundary area which is between a main and a supplementary service area. The main and the supplementary modulated signals are modulated in a main and a supplementary modulation system, respectively. A first processing circuit (23) processes the main and the supplementary modulated signals into a first processed signal under control by a control circuit (28). A second processing circuit. (24) processes the main and the supplementary modulated signals into a second processed signal under control by the control circuit. In accordance with the first and the second processed signals, a signal producing circuit (25) produces a local signal. A switch circuit (26) selects one of the first processed, the second processed, and the local signals under control by the control circuit.

REFERENCES:
patent: 4908839 (1990-03-01), Morimoto et al.
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5179360 (1993-01-01), Suzuki
patent: 5203023 (1993-04-01), Saito et al.
patent: 5249303 (1993-09-01), Goeken
patent: 5396484 (1995-03-01), Itoh
patent: 5418815 (1995-05-01), Ishikawa et al.
patent: 5428664 (1995-06-01), Kobayashi

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