LEX signal tracking method, positioning signal receiving method, LEX signal tracking program, positioning signal receiving program, LEX signal tracking device, positioning signal receiving device and mobile terminal

摘要

A LEX signal tracking method of continuously tracking a LEX signal is provided. The LEX signal broadcast from a Quasi-Zenith Satellite is demodulated. A weekend approach notification signal S_near is generated based on a time within a week obtained from the demodulated LEX signal. A state of a Long code, which is generated when a code correlation processing is performed, is analyzed. If the analyzed code state is in agreement with a stored 997425th code state, a pulse signal dplus is generated. If the generation of the pulse signal dplus is immediately after the detection of the weekend approach notification signal S_near, the Long code is reset to an initial state.