Patent ID: 8665149
Filing Date: 2014-03-04
Classification: G01S

Abstract:
1. A navigation signal processing apparatus for processing a navigation signal received from a navigation satellite to thereby facilitate navigation signal acquisition of a receiving terminal, the navigation signal processing apparatus comprising: a database; a receiving unit configured to receive the navigation signal from the navigation satellite, including to receive first navigation data and to subsequently receive second navigation data after a time interval synchronized with a code period of the navigation signal; a processing unit configured to detect a frequency offset and a code offset from the navigation signal, including to respectively detect first and second code offsets, and to respectively detect first and second frequency offsets, from the received first and second navigation data; and an operation unit configured to compute a clock offset of the navigation signal that is a difference between the second frequency offset and a Doppler frequency shift, including the processing unit performs the navigation signal acquisition using the computed clock offset and a search range that is determined by the second frequency offset and the second code offset, but not by the computed clock offset.