Low noise GPS (Global Positioning System) carrier wave tracking method based on RSL (Recursive least square filter)
A carrier tracking, low-noise technology, used in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc.
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[0026] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] Such as figure 1 Shown is a functional block diagram of the RSL-based low-noise GPS carrier tracking method of the present invention. The steps of the carrier tracking method are as follows:
[0028] (1) The sine signal generated by the satellite digital intermediate frequency signal and the carrier numerical control oscillator is mixed by a mixer to generate an in-phase mixing result, and then the in-phase mixing result is multiplied by the C / A code generated by the code generator To achieve carrier stripping and code stripping, the same direction sampling signal i(t) is obtained; the C / A code generated by the code generator is a pseudo-random code of GPS satellites, and the code rate is 10.23M.
[0029] Perform 90-degree phase transformation on the sine signal generated by the carrier numerically controlled oscillator to gen...
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