COHERENT INTEGRATION ENHANCEMENT CIRCUIT, POSITIONING CIRCUIT, ELECTRONIC EQUIPMENT, COHERENT INTEGRATION ENHANCEMENT METHOD, POSITIONING METHOD, PROGRAM, AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To prevent an integrated value from being set off (canceled) by phase inversion of a navigation message included in a positioning satellite signal, to integrate a coherent in a phase modulation period or more of integration time.;SOLUTION: Integrated correlation values (I and Q integrated correlation values) of each of I and Q signals with an orthogonally separated received signal and a replica code are calculated by coherent integration performed by a correlation processing circuit part 32. Then, I and Q integrated correlation values are calculated by integrating further integrated phase values that are I and Q coordinate values of the integrated correlation values after converted, after phase angles θ of the integrated correlation values using the respective I and Q integrated correlation values as the I and Q coordinate values are converted into a double angle 2θ, by a coherent integration enhancement circuit 35. The in-coherent integration for the I and the Q enhancement integrated correlation values are carried out by the coherent integration enhancement circuit 35. A coherent integration time T1 by the correlation processing circuit section 32 is set to be 20 ms or less, and an integration time T2 by the coherent integration enhancement circuit part 35 is set to be longer than 20 ms.;COPYRIGHT: (C)2009,JPO&INPIT