| 摘要 |
PURPOSE:To attain efficient carrier communication even when signals of plural kinds have different requirements with respect to the transmission quality by allocating a radio carrier for each slave station depending on a transmission line characteristic between a master station-and each slave station in the radio communication system of a point-to-point system. CONSTITUTION:When a master station 110 sends a signal to, e.g. slave stations 131, 132 by using transmission lines 121, 122, figures 150, 170 similar to those for a conventional system are used to represent the characteristics of the transmission lines 121, 122. However, in this method, a carrier with less deterioration due to multi-path is selected by monitoring the characteristic of the transmission lines. Thus, the slave station 131 uses a carrier 151 and the slave station 132 selects a carrier 171 to reduce the effect of multi-path onto any slave station. Furthermore, when four carriers are used, a reception signal 310 of the slave station is given to a transmission line characteristic monitor 320 and branched into four and filters indicated by numeric captions 331-334 are used to extract the frequency component corresponding to the carrier.
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