Patent ID: 7053827
Filing Date: 2006-05-30
Classification: G01S

Abstract:
1. A GPS (Global Positioning System) reception method comprising the steps of; if a signal received from at least one GPS satellite is in a synchronization hold state, an intermediate carrier frequency of said signal is known, orbit information about said GPS satellite in the synchronization hold state is stored in a storage section, and a position and a current time of a receiver of said signal are known, computing an intermediate frequency carrier error as an error of said intermediate carrier frequency on the basis of an oscillation frequency error of a reference oscillator of said receiver from said intermediate carrier frequency of said signal, a position and a velocity of said GPS satellite in the synchronization hold state obtained from said orbit information and said current time, and said position of said receiver; adjusting said intermediate carrier frequency by an amount equal to said computed intermediate frequency carrier error; acquiring signals received from other GPS satellites by use of said adjusted intermediate carrier frequency; and generating a clock signal via the reference oscillator that produces an equivalent oscillation frequency error for said synchronization hold state and a synchronization acquisition state.