Patent ID: 6728224
Filing Date: 2004-04-27
Classification: H04W

Abstract:
A portable mobile terminal comprising:a modulating section for modulating a transmission signal by using a spectrum spread system; an amplifying section for amplifying said transmission signal, modulated by said modulating section, to a needed transmission power; a plurality of variable gain units provided between said modulating section and said amplifying section to be connected in series to each other for changing a gain of said transmission signal modulated by said modulating section, one or more of said plurality of variable gain units respectively having negative gradient gain-to-phase characteristics and the other one or more of said variable gain units respectively having positive gradient gain-to-phase characteristics to cancel a phase variation of said transmission signal caused by the entire gain variation; and a control section for controlling a gain of each of said variable gain units in accordance with a transmission power control signal from a base station.