SYSTEMS AND METHODS FOR ESTIMATING PSEUDORANGE ERRORS

摘要

Methods and systems for estimating pseudorange error are described. A method for estimating a pseudorange error includes generating a plurality of coarse/acquisition (C/A) codes corresponding to a satellite according to intermediate frequency (IF) signal data obtained from the satellite. The method further includes determining autocorrelation values for each of the plurality of C/A codes with the IF signal data; obtaining a first time-shifted value of a first prompt C/A code and a second time-shifted value of a second prompt C/A code corresponding to a maximum autocorrelation of the autocorrelation values; and determining a pseudorange error based on the first time-shifted value, the second time-shifted value, and the autocorrelation values. The plurality of C/A codes may include the first prompt C/A code, early C/A codes advanced relative to the first prompt C/A code, and late C/A codes delayed relative to the first prompt C/A code.

主权项

1. A method for estimating a pseudorange error, the method comprising:
generating a plurality of coarse/acquisition (C/A) codes corresponding to a satellite according to intermediate frequency (IF) signal data obtained from the satellite; determining autocorrelation values for each of the plurality of C/A codes with the IF signal data; obtaining a first time-shifted value of a first prompt C/A code and a second time-shifted value of a second prompt C/A code corresponding to a maximum of the autocorrelation values; and determining a pseudorange error based on the first time-shifted value, the second time-shifted value, and the autocorrelation values.