초록 ▼

A mobile communication system is arranged to have a code divisional multi access system as in the North America standard system and to control a transmission power for reducing an influence of interference of one channel to the other ones by lowering a control error of the electric power transmitted

A mobile communication system is arranged to have a code divisional multi access system as in the North America standard system and to control a transmission power for reducing an influence of interference of one channel to the other ones by lowering a control error of the electric power transmitted on an up line. In the base station, a receiving section 106 of a tranceiving unit 100 provides a pilot symbol in-phase adding circuit 113 for detecting a carrier signal point represented by an in-phase component and an quadrature component at regular intervals. The amplitude of the detected carrier signal point is corrected by an amplitude correcting circuit 114 by using the previous control values for transmission power 116 read from a memory 115. Then, a predicting circuit 117 predicts a carrier signal point at a time when the next control for transmission power is executed by using the corrected carrier signal point. The predicted carrier signal point is compared with a reference signal through a comparing circuit 119. Next, a transmission power control circuit 121 generates a control value for transmission power at a time when the next control for transmission power is executed, transmits the control value to the mobile devices, and store the control value in the memory 115. The mobile devices control the transmission power based on the control value.

대표청구항 ▼

[ What is claimed is:] [1.] A mobile communication system comprising:a base station; anda plurality of mobile devices;wherein said base station comprises:means for detecting a carrier signal point represented by an in-phase component and a quadrature component at regular intervals;means for correcti

[ What is claimed is:] [1.] A mobile communication system comprising:a base station; anda plurality of mobile devices;wherein said base station comprises:means for detecting a carrier signal point represented by an in-phase component and a quadrature component at regular intervals;means for correcting an amplitude of said carrier signal point detected by said detecting means according to previous transmission power control values;means for predicting a carrier signal point at a time point when next control for transmission power is executed by using said carrier signal point whose amplitude is corrected by said correcting means;means for comparing an electric power of said carrier signal point predicted by said predicting means with a predecidedreference value;means for generating a control value for said transmission power at said time point when said next control for transmission power is executed, based on said compared result given by said comparing means;a memory for storing said control value for transmission power generated by said generating means and supplying said previous control values for transmission power to said correcting means;means for transmitted said control value for transmission power; andwherein said plurality of mobile devices are connected to said base station through a radio wave of one frequency so that said mobile devices are controlled to keep signal electric powers received by said base station identical with each other according to said control value for transmission power transmitted from said base station.