RADIO BASE STATION ANTENNA SYSTEM, CENTRALIZED BASE STATION, MOBILE COMMUNICATION EQUIPMENT, AND RECEIVING STATE MEASURING INSTRUMENT FOR MOBILE COMMUNICATION

摘要

PURPOSE:To realize the miniaturization of a radio base station by concentrically handling the transmission.reception radio signals of scattered many base stations by using light transmission technique by utilizing the excellent low noise characteristic, low distortion characteristic and wide range characteristic of light beam type transmission. CONSTITUTION:Electricity/light conversion circuits 100, 200, 300, 400, 500, 600 convert the radio signal of every radio base station into a light signal. Transmitting optical fibers 1', 2', 3', 4', 5', 6' centralize the signal of every base station to a central station 9. Light/electricity conversion circuits 1000, 2000, 3000, 4000, 5000, 6000 return the radio signal converted into light to the signal of former frequency. A switching device 7 selects optional one of the light/ electricity converting devices, and supplies the output of it to a succeeding measuring instrument 8. The measuring instrument 8 is provided with a synthesizer, and is capable of switching the radio frequency to be measured. Accordingly, a receiving state measuring instrument for mobile communication can monitor the measuring state of different terminals by a time division system.