Multicarrier cdma base station system and multi-code wave forming method therof

Abstract

A base station system of a multicarrier CDMA and a data transmission method and a mobile communication system using the same are disclosed. The system includes a base station controller connected with an exchanger for generating random phase values as much as the number of carriers when a call set-up is requested and for outputting a paging information containing the phase values, a pilot signal modulation unit 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 controller, a paging signal modulation unit for generating a spread spectrum modulated I-phase paging signal and Q-phase paging signal having predetermined phase differences compared to the pilot signal as many as the number of the carriers, a plurality of traffic signal modulation units for generating, as many as the number of the carriers, a spread spectrum modulated I-phase traffic signal and Q-phase traffic signal having phase differences between the carriers as much ad the phase transition values inputted from the base station controller compared to the pilot signal, and 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.