METHOD FOR DEMODULATING CHANNEL SIGNAL OF DIGITAL MOBILE COMMUNICATION SYSTEM AND DEVICE THEREFOR - THE DEVICE AND METHOD INCREASE THE RECEIVE PERFORMANCE OF A TERMINAL BY COMPENSATING FOR CHANNEL-DISTORTION BY USING DISTORTED CHANNEL INFORMATION OF A FORWARD PILOT CHANNEL TRANSMITTED FROM A BASE STATION TO THE TERMINAL

摘要

PURPOSE: A device for demodulating a channel signal of a digital mobile communication system is provided to integrate an inputted RF signal to generate a pilot signal, and to calculate distortion information of a receiving channel by using the pilot signal, thereby compensating for a channel signal by using the calculated distortion information. CONSTITUTION: A frequency converter(111) converts an RF signal into a baseband signal. An A/D converter(112) converts the baseband signal into a digital signal. A time synchronizer(113) divides paths of the digital baseband signal, and synchronizes times of the divided paths. A descrambler(114) inputs a PN code to the outputted signal, and descrambles the signal. A pilot signal generator(115) integrates the descrambled signal, and outputs a channel pilot signal. A channel information generator(117) receives the pilot signal to compare the signal with a preset pilot signal, and outputs channel distortion information. A Walsh demodulator(116) outputs each channel data signal. A channel compensator(118) inputs each channel data signal and the pilot signal, and compensates for a delayed phase. A signal determiner(119) inputs the channel distortion information and the phase-compensated signal, and restores data of each channel.