| 摘要 |
PURPOSE: A code division multiple access(CDMA) multiplex communication system is provided to transmit CDMA analog signals of a baseband through digital multiplying, thereby transceiving of tens of channels in one optical cable, and to integratedly operate a network so that remote units(RUs) are increased and channels can be re-arranged for the RUs without changing a system. CONSTITUTION: A donor unit(DU,2) converts code division multiple access(CDMA) signals of a base transceiver station-channel bank(BTS-CB,1) of a base station into CDMA signals of a baseband, and delivers the converted signals to a remote unit(RU,3). The RU(3) converts CDMA analog signals received from a wireless terminal into digital signals of the baseband, and outputs the digital signals to the DU(2) through multiplication. The DU(2) converts digital signals received from the RU(3) into CDMA analog signals, and delivers the converted analog signals to the BTS-CB(1).
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