RECEIVING TERMINAL AND PORTABLE WIRELESS TERMINAL FOR GLOBAL POSITIONING SYSTEM

摘要

PROBLEM TO BE SOLVED: To demodulate a satellite signal without deteriorating receiving performance. SOLUTION: The demodulation timing of a GPS signal S1 received from a satellite of a global positioning system is controlled based on transmission timing with which a CDMA transmission signal S3 is transmitted to a base station of a specific communication system. This prevents a radio wave produced during the transmission of the signal S3 from acting as interference wave with the signal S1, thus enabling the signal S1 to be demodulated accurately. The demodulation of the signal S1 can be performed without deteriorating receiving performance.