Doppler positioning method and device, electronic equipment and storage medium

A positioning method and Doppler speed-fixing technology, which can be used in measurement devices, satellite radio beacon positioning systems, radio wave measurement systems, etc. The effect of positioning accuracy

Pending Publication Date: 2022-05-13
TSINGHUA UNIV
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Problems solved by technology

But similarly, limited by the current Doppler positioning technology, its positioning accuracy is poor

Method used

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  • Doppler positioning method and device, electronic equipment and storage medium
  • Doppler positioning method and device, electronic equipment and storage medium
  • Doppler positioning method and device, electronic equipment and storage medium

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Embodiment Construction

[0052] The present invention provides a Doppler positioning method, device, electronic device and storage medium, which are further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] The embodiment of the first aspect of the present invention proposes a Doppler positioning method. The method is based on the rough position and velocity solution results provided by the traditional Doppler positioning algorithm, firstly estimates the precise initial position backward, and then uses the initial position to forward Estimate the precise current position, and then achieve the purpose of providing users with precise positioning results. The overall process of the method is as follows figure 1 shown, including the following steps:

[0054] S1. The user to be positioned performs down-conversion, sampling, and quantization processing on the received K satellite signals to obtain a digital intermediate frequency signal; wherein, K≥7; ...

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Abstract

The invention provides a Doppler positioning method and device, electronic equipment and a storage medium, and relates to the field of satellite navigation positioning. The method comprises the following steps: acquiring original Doppler observed quantities and satellite ephemeris information of multiple satellite signals of a to-be-positioned target, smoothing the original Doppler observed quantities, and then obtaining a Doppler coarse positioning result and a constant speed result of the to-be-positioned target based on a traditional Doppler positioning algorithm; and then obtaining an accurate initial position at a set initial moment through reverse estimation, and forward estimating an accurate current position by using the accurate initial position. According to the method, a user can obtain a high-precision Doppler positioning result, on one hand, the method can be used for detecting deception attacks such as GPS, GLONASS, Galileo, Beidou and the like to improve the application security of a satellite navigation system, and on the other hand, the method can also be used in the fields of newly-developing low-orbit satellites such as Starlink, Oneweb, iridium and the like, so that the satellites have high-precision navigation positioning capability.

Description

technical field [0001] The invention relates to the field of satellite navigation and positioning, in particular to a Doppler positioning method, device, electronic equipment and storage medium. Background technique [0002] The global satellite navigation system (GNSS) represented by GPS, GLONASS, Galileo, and Beidou can provide users with all-weather positioning, navigation, and timing services. It has been widely used in typical application scenarios and shows broad development prospects. Currently, GNSS user terminals generally obtain positioning solution results through navigation signal pseudo-range observations. [0003] On the other hand, due to the impact of GNSS spoofing attacks in recent years, the positioning calculation results of GNSS user terminals often make mistakes, which has a great impact on GNSS applications. For this reason, how to discover the abnormality of GNSS positioning calculation results in time is particularly important. A common method to d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/43G01S19/39
CPCG01S19/43G01S19/393
Inventor 李洪周子恒陆明泉
Owner TSINGHUA UNIV
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