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.

Inactive Publication Date: 2016-10-12
TIANJIN NAVIGATION INSTR RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art, to provide an inertial navigation speed-assisted receiver tracking loop algorithm, and to solve the problem of conflicting dynamic performance and bandwidth requirements of the tracking loop

Method used

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  • Inertial navigation speed auxiliary receiver tracking loop algorithm
  • Inertial navigation speed auxiliary receiver tracking loop algorithm
  • Inertial navigation speed auxiliary receiver tracking loop algorithm

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Embodiment Construction

[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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Abstract

The invention relates to an inertial navigation speed auxiliary receiver tracking loop algorithm, characterized by mainly comprising the steps of: through a mixer and a correlator, stripping carrier and pseudo-random code signals being obtained based on digital intermediate frequency signals; through integral resetting devices and a loop discriminator, loop phase errors being obtained based on the stripping carrier and pseudo-random code signals; through a loop filter, smoothed loop phase errors being obtained based on the loop phase errors; and correcting carrier NCO based on loop discrimination errors and inertial navigation speed auxiliary information. The method estimates loop Doppler shift through an inertial navigation speed, reduces the dynamic range bore by a loop so as to reduce a loop equivalent noise equivalent noise, furthermore reduces tracking loop in-band interference, and improves a satellite navigation receiver anti-interference capability.

Description

technical field [0001] The invention belongs to the technical field of navigation, in particular to an inertial navigation speed-assisted receiver tracking loop algorithm. Background technique [0002] With the increasing maturity of satellite navigation systems, the application of satellite navigation receivers in military and civilian fields is further expanded. The accuracy and continuity of navigation services in complex environments has become the core technology, in which the performance of the satellite navigation tracking loop is crucial. When the dynamics of the carrier is too large, the Doppler frequency of the satellite signal will deteriorate, and the traditional tracking loop needs to increase the bandwidth to achieve tracking. Increasing the bandwidth will lead to increased interference within the bandwidth, and excessive interference signals will also cause the traditional loop to fail. lock, the receiver cannot function properly. In addition, when the dynam...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/29G01S19/30G01S19/21G01S19/23
CPCG01S19/29G01S19/21G01S19/23G01S19/30
Inventor 傅金琳刘红光胡才刘季兰晓阳梁臣
Owner TIANJIN NAVIGATION INSTR RES INST
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