A SIGNAL DETECTING DEVICE AND A OPERATING METHOD THEREOF MULTIPATH SEARCHER FOR RECEIVING MODEM ON BASE STATION

摘要

PURPOSE: A device for detecting a signal of a base station receiving modem multi-path searcher and an operating method therefor are provided to enable a base station receiving modem to detect a mobile speed of a portable terminal and to detect an SNR(Signal to Noise Ratio) of a signal received from the portable terminal, and to control the speed and the SNR in non-coherent/coherent methods, thereby reducing a mean acquisition time of the signal. CONSTITUTION: A detector(140) despreads applied signals, accumulates the despread signals with a control signal, improves an SNR, and outputs the accumulated signals as power values. An adder(150) adds each power value, and outputs one signal. An accumulator(160) overlapping-accumulates the signal outputted from the adder(150) with a control signal value, and increases energy size. A Doppler portion(170) analyzes a signal received from a portable terminal, detects a mobile speed, and outputs the corresponding control signal proportion to the detected speed. An interference detector(180) analyzes the received signal to detect an SNR, compensates the control signal, and outputs the control signal to the detector(140) and the accumulator(160).