Patent ID: 6466560
Filing Date: 2002-10-15
Classification: H04W

Abstract:
A system for obtaining Ec/Io for a predetermined site for use in positioning a base station used for a mobile communication system using CDMA, comprising:a plurality of continuous wave generators for generating continuous waves of constant output power, the continuous waves having frequencies different from each other; a continuous wave receiver for receiving the continuous waves from the plural of continuous wave generators so as to measure RSSI of the continuous waves, and receiving GPS information at the same time; and a computer for receiving the RSSI of the continuous waves and the GPS information so as to measure Ec/Io of a predetermined site; wherein the continuous wave receiver comprises: a receiving antenna for receiving the continuous waves; a frequency generator for periodically generating a plurality of frequencies different from each other; a frequency synthesizer for synthesizing an output frequency of the frequency generator and a signal received on the receiving antenna so as to convert into an intermediate frequency; a switching part for outputting a predetermined signal by periodically switching the intermediate frequency from the frequency synthesizer; a RSSI sensor for sensing the RSSI from an output of the switching part; a A/D convertor for converting the RSSI into a digital signal; a decoder for receiving the digital signal of the RSSI while controlling the output frequency from the frequency generator and a switching operation of the switching part; a GPS antenna for receiving GPS signal; and a GPS receiver for measuring latitude, longitude and time information from the GPS signal.