| 摘要 |
PURPOSE: A device for tracking and obtaining a GPS signal and a method thereof are provided to quickly track a signal without a signal obtaining process by using a GPS L1 C/A signal processing result when processing an L2C or L5 signal. CONSTITUTION: An L1 signal processing unit(210) is composed of an L1 signal obtaining unit(211) and an L1 signal tracking unit(212). The L1 signal obtaining unit obtains a satellite number, a doppler frequency, and a code phase from an L1 C/A signal received from a satellite. The L1 signal tracking unit tracks a signal based on the obtained satellite number, the doppler frequency, and the code phase. An L2C signal processing unit(220) is composed of an L2C doppler converting unit(221) and an L2C signal tracking unit(222). The L2C doppler converting unit converts the calculated doppler frequency into a doppler frequency of an L2C signal. An L5 signal processing unit(230) is composed of an L5 doppler converting unit(231) and an L5 signal tracking unit(232). [Reference numerals] (210) L1 signal processing unit; (211) L1 signal obtaining unit; (212) L1 signal tracking unit; (220) L2C signal processing unit; (221) L2C doppler converting unit; (222) L2C signal tracking unit; (230) L5 signal processing unit; (231) L5 doppler converting unit; (232) L5 signal tracking unit; (A1,A2) Satellite number; (B1,B2,B3,B4) Doppler frequency; (C1,C2) Code phase
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