MOBILE COMMUNICATION TERMINAL DEVICE AND TRANSMITTING POWER CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To solve the problem in which the PAR (Peak to Average Ratio) of a modulated signal varies as the number of multiplexed waves of the modulated signal modulated by a mobile station increases during communication using HSDPA (High Speed Down Link Packet Access).

SOLUTION: A bias voltage supplied from a power source to HPA according to an amplification coefficientβhs is controlled by performing processing for deciding whether control data of a 2nd control channel are added in addition to transmission data of a data channel and control data of a 1st control channel, and processing for controlling a driving voltage driving the amplification part amplifying the electric power of the transmitted signal sent to a base station according to an amplitude coefficient of the 2nd control channel, thereby suitably controlling the linearity of the HPA corresponding to the varied PAR.

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