| 摘要 |
PROBLEM TO BE SOLVED: To improve line quality by realizing diversity reception with an incoming line. SOLUTION: Transmission/reception shared antennas 61 , 63 ,... of a first group is arranged in closed space 7 so as to permit adjacent zones to be partially superimposed and the transmission/reception shared antennas 62 , 64 ,... of the second group are arranged in the neighborhood of the area where the zones of the first group are superimposed. The slave station devices 21 , 23 ,... and 23 , 25 ,... of the first group and the second group transmit signals inputted from the first and the second group antennas to a master station device 1. The master station device 1 synthesizes the respectively inputted signals from the first and the second group slave station devices and respectively inputs them to the first and second receiving parts 9a and 9b of a base station device 5. The base station device 5 diversity-receives the signals which are respectively inputted to the first and the second receiving parts 9a and 9b. An optical fiber is used in a transmission path between the master device 1 and the respective slave station devices 2i. When the master station device 1 is separated from the base station device 5, vertical polarized wave and horizontal polarized wave are utilized in the two incoming lines so that radio transmission is executed through the use of a polarized wave shared antenna. |
