| 摘要 |
PURPOSE:To attain effective use of occupied frequency by avoiding a high base band frequency by the own station when an adjacent station uses the high base band frequency. CONSTITUTION:It has been known that the spread of spectrum is proportional to the increase in the base band frequency and also the depth of degree of modulation. Thus, the band width is not spread when a carrier fB close to nonmodulation in a station having no mobile station for communication like a base station B. On the other hand, a mobile station 2 enters a service area of the own station, then it may require no communication service. The amount of communication to be treated by each base station is changed timewise in this way. The base stations 1 make communication with each other and the stations using a channel having a high base band frequency are adjacent to each other, then the own station withholds the use of the high base band frequency. Thus, the mutual communication interference is reduced and the effective use of the occupied frequency is attained. |
