Inertial navigation speed auxiliary receiver tracking loop algorithm
A tracking loop and receiver technology, applied in the field of navigation, can solve the problems such as the contradiction between the dynamic performance of the tracking loop and the bandwidth requirement, and achieve the effect of improving the dynamic range, the dynamic performance, and the anti-interference ability.
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[0041] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:
[0042] An inertial navigation speed-assisted receiver tracking loop algorithm is developed in such as figure 2 The shown INS speed-assisted receiver tracking loop is realized. The tracking loop uses the loop identification error and the INS speed auxiliary information to correct the carrier NCO, and reduces the required load of the satellite tracking loop through the INS speed assistance. The carrier phase error range of , specifically includes the following steps:
[0043] The digital intermediate frequency signal after A / D conversion is passed through a mixer and a correlator to obtain a signal stripped of a carrier and a pseudo-random code, and then the loop phase error is obtained through an integral clearing and a loop discriminator, and passed through a loop filter After smoothing, the smoothed loop phase error is obtained, and finally the ...
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