Multipath inhibiting method of correlator
A technology of correlator and correction factor, which is applied in the field of GPS communication, can solve the problems of large error and insignificant short multipath suppression effect, and achieve the effects of improving performance, accurate code phase estimation, and precise positioning
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[0024] see figure 1 , the satellite 101 sends out a signal, part of which is a direct signal 102, which directly reaches the receiving antenna 103; while the other part reaches the antenna after being reflected by the ground plane or other buildings 105, which is the multipath signal 104, and the multipath signal interferes with the positioning accuracy .
[0025] see figure 2 , according to the relationship between the phase of the multipath signal and the direct signal, the multipath signal can be divided into two types: in-phase signal and anti-phase signal.
[0026] see image 3 , the correlation triangle output by the correlator is shown in the figure, and different correlation intervals can obtain different leading components and lagging components. In the figure, d1=d, d2=2d, d is the interval of a C / A code chip, ideally , respectively to get E 2 ,E 1 , P, L 1 , L 2 The position on the relevant triangle is shown in the figure; if there are multipaths, their posi...
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