Patent ID: 7236467

Claim:
A CDMA communication system, comprising a base station radio unit, a base station control unit, and a mobile station terminal unit; wherein said base station radio unit comprises a pilot power control unit for controlling a desired wave power-to-interference wave power ratio of a pilot signal to stay at a preset value, and wherein said base station radio unit further comprises: a reception unit for receiving and demodulating a radio signal from said mobile station terminal unit; a decoder for decoding a demodulated signal into a speech control frame signal; a coder for encoding a speech frame signal sent from said base station control unit; a transmitting unit for modulating an encoded signal and transmitting said encoded signal; a transmission power control unit for computing an optimal transmission power value of said speech frame signal based on electric field intensity and a reference value, and transmitting said optimal transmission power value to said coder; and a multiplexing unit for composing said encoded signal, and wherein said pilot power control unit receives a multiplex wave from said multiplex unit, and controls the desired wave power-to-interference wave power ratio of the pilot signal to stay at said preset value only when multiplex wave power exceeds a predetermined value.