Patent ID: 6259402
Filing Date: 2001-07-10
Classification: G01S,H04B

Abstract:
A GPS (Global Positioning System) receiver comprising:a receiving portion receiving a signal transmitted from a satellite;a correlation value calculation portion connected to said receiving portion, generating a pseudo noise signal corresponding to the satellite and calculating a correlation value of a reception signal output from said receiving portion and said pseudo noise signal;a data demodulation device connected to said correlation value calculation portion, demodulating data included in said reception signal based on said correlation value every predetermined cycle;a time period determination device connected to said correlation value calculation portion, seeking a condition of said reception signal at reception based on said correlation value and determining a correlation value calculation period at said correlation value calculation portion according to said condition at the reception; anda process suspension control device connected to said time period determination device and said correlation value calculation portion, obtaining a suspension period of an operation relating to the calculation of said correlation value at said correlation value calculation portion based on said predetermine cycle and said correlation value calculation period and suspending the operation relating to the calculation of said correlation value at said correlation value calculation portion for said suspension period.