| 摘要 |
PROBLEM TO BE SOLVED: To provide an L2C signal tracking device for certainly tracking an L2C signal regardless of a receiving state of the L2C signal. SOLUTION: A carrier phase tracking device comprises a carrier phase error calculating part 1, a carrier NCO 2, a carrier loop filter 3, a CM code generator 10a, and a CL code generator 10b. The carrier phase error calculating part 1 outputs a carrier phase error calculated based on a maximum likelihood method to the carrier NCO 2 via the carrier loop filter 3, based on the carrier phase inputted from the carrier NCO 2, the CM code signal inputted from the CM code generator 10a, and the CL code signal inputted from the CL code generator 10b. The carrier NCO 2 calculates the carrier phase based on the carrier phase error and outputs it to the carrier phase error calculating part 1. COPYRIGHT: (C)2006,JPO&NCIPI
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