| 摘要 |
PURPOSE: To simplify a radio base station installation by changing a conversion frequency of an up-converter of a base station converting a base band signal sent through a fixed channel from a central station into a radio signal according to a prescribed hopping pattern. CONSTITUTION: An exchange station inputs an information signal to a base band signal generating section 1 of a centralized station S, in which a base band signal is generated. The base band signal is sent to base stations B1-B3 via a fixed channel from a transmission section 3, an up-converter 5 converts the base band signal into a radio signal, and it is sent from a transmission section 11. Simple installation of the radio base station is enough by changing a converting frequency of the up-converter according to a hopping pattern. |
