| 摘要 |
PURPOSE:To perform improved spread spectrum communication at all times without mutually exerting adverse influence on an opposite group by the groups of respective stories. CONSTITUTION:To the building of six stories, six radio zones are arranged in the respective stories and defined as one group. A center frequency 16 and a spreading code C6 are allocated to the group of a first story, the center frequency f5 and the spreading code C5 are allocated to the group of a second story and the center frequency f4 and the spreading code C4 are allocated to the group of a third story. Also, the center frequency f3 and the spreading code G3 are allocated to the group of a forth story, the center frequency f2 and the spreading code C2 are allocated to the group of a fifth story and the center frequency f1 and the spreading code C1 are allocated to the group of a sixth story. Then, the band width at spread spectrum modulation waves is defined as the half of a system band width and the center frequencies f1-f6 of the respective spread modulation waves are shifted with an equal interval and arranged without changing the band width. |
