| 摘要 |
PURPOSE:To simplify the constitution of a mobile communication system by deciding on what fixed station the system is to be connected through a circuit on a mobile station side. CONSTITUTION:Fixed stations 21-24 are connected to a center station 20 through a common transmission line 26. In the figure, 25 is a mobile station connected to one of the fixed stations 21-24 through the circuit. Those fixed stations generate individual spectral diffusion codes whose mutual relation is less in at least a signal arrival ranged, and carriers are modulated by the codes and transmitted. The mobile station reversely diffuses all of spectral diffusion codes received and then demodulated to select one of the reversely diffused signals which has maximum intensity, and then sends a circuit connection request signal to one of fixed station which has sent the selected maximum- intensity signal. |
