Terminal station which does not cause an interruption of communication on changing of a communication system
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United States of America Patent
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-
Apr 29, 1997
Grant Date -
N/A
app pub date -
Dec 21, 1994
filing date -
Dec 24, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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