New system satellite signal NH code stripping method
A technology of satellite signals and satellite navigation signals, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems affecting tracking accuracy, frequency acquisition ambiguity, and limited time length of tracking pre-check integration, etc., to achieve Accurate capture results, save capture time, and achieve precise capture effects
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[0043] The present invention will be described in detail below with reference to the drawings and specific embodiments:
[0044] A new system of satellite signal NH code stripping method. The acquisition is divided into two stages: pre-acquisition and full-bit acquisition. In the pre-acquisition stage, a parallel frequency search algorithm is used to determine the frequency and code of the satellite navigation signal with a length of a pseudo code period. The phase performs a full range search. Due to the NH symbol jump, accurate capture of the code phase can be achieved, but only a rough capture of the frequency can be achieved; then in the full bit capture stage, the local buffer is adjusted according to the accurate code phase capture result For the phase of the data, perform a correlation operation on every two adjacent pseudo code periods in a satellite navigation signal with a length of one NH code period, and judge whether there is a NH symbol jump between them according to...
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