To obtain the bit synchronization of a mobile station for communicating with a different radio base station by measuring transmission/reception delay time in a plurality of routes while transmission is performed from a centralized base station and reception is performed through a plurality of radio base stations and the mobile station further.
Signals modulated in the modulator 12 of the centralized base station 10 are transmitted through an outgoing channel to the radio base station 51, converted to a radio frequency and transmitted from an antenna 53. Simultaneously, they are received in the antenna 54, converted to a sub carrier frequency, transmitted through an incoming channel to the centralized base station 10 and demodulated in a demodulator 13. During the time, by detecting a unique word, delay time from the transmission to the reception is measured. Similarly, the delay time of the radio base station 72 is measured. Further, by a similar means, the transmission is performed from the centralized base station 10 to the radio base station 51, the reception is performed through the radio base station 71 by the centralized base station 10 and further, the transmission/reception delay time through the mobile station 81 is measured. Thus, the bit synchronization of the mobile station for performing the communication with the different radio base station is performed.
MIURA SHUNJI
ARAKI KOJIRO
