Patent ID: 6324171
Filing Date: 2001-11-27
Classification: H04J,H04L

Abstract:
A multicarrier CDMA base station system, comprising:a base station control means connected with an exchanger for generating random phase values as much as the number of carriers when a call set-up is requested and outputting a paging information containing the phase values;a pilot signal modulation means for generating a spread spectrum modulated I-phase pilot signal and Q-phase pilot signal as many as the number of the carriers in accordance with a control of the base station control means;a paging signal modulation means for generating a spread spectrum modulated I-phase paging signal and Q-phase paging signal having predetermined phase differences compared to the pilot signals as many as the number of the carriers;a plurality of traffic signal modulation means for generating, as many as the number of the carriers, spread spectrum modulated I-phase traffic signal and Q-phase traffic signal having phase differences between the carriers as much as the phase transition values inputted from the base station control means compared to the pilot signal;a plurality of combiners for combining the I-phase signal and Q-phase signal, respectively, inputted from each modulation apparatus corresponding to a corresponding one of the carriers; anda radio frequency transmission means for modulating the signals to a radio frequency using the I-phase signal and Q-phase signal inputted from the combining means corresponding to a corresponding one of the carriers.