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A loop processing method for inertial information assisted satellite signal tracking

A tracking loop and inertial assistance technology, applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of limited satellite navigation system applications, the inability of user equipment to obtain positioning information normally, and the inability to generate positioning information. Ease of application, improved performance and tracking sensitivity, and easy-to-engineer effects

Active Publication Date: 2019-08-13
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the signal's susceptibility to interference and the high dynamics of the carrier, the user equipment cannot normally obtain satellite signals, and thus cannot generate positioning information, which largely limits the application of satellite navigation systems.

Method used

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  • A loop processing method for inertial information assisted satellite signal tracking
  • A loop processing method for inertial information assisted satellite signal tracking
  • A loop processing method for inertial information assisted satellite signal tracking

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Embodiment Construction

[0062] A method for using inertial information to assist satellite receiver tracking loop processing according to the present invention will be described in detail below in combination with specific embodiments.

[0063] The present invention uses inertial information to assist satellite receiver tracking loop processing method, comprising the following steps:

[0064] Step 1. In the case of no inertial information assistance, adopt the traditional tracking loop; in the case of inertial information assistance, use the tracking loop in the form of inertial assistance; the switching of the two loops is determined by whether there is inertial information;

[0065] Step 2. The carrier acceleration information output by the inertial navigation is used as the inertial auxiliary information, and the acceleration information is converted into the line-of-sight acceleration information of each tracking satellite;

[0066] Step 3. The line-of-sight acceleration information of each star ...

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Abstract

The invention belongs to the field of satellite receiver baseband signal processing, and relates to a processing method of a satellite receiver tracking loop assisted by inertial information. According to the invention, accelerated speed information output by inertial navigation is used to assist the satellite receiver tracking loop to reduce the dynamic stress error of a carrier tracking loop; the equivalent noise bandwidth of the tracking loop can be reduced; long-time coherent integration is realized; the thermal noise error of the loop can be reduced; the tracking performance of the loop for a low carrier-to-noise ratio signal is improved; the realization form of the satellite signal tracking loop under the assistance of inertia information is disclosed; the calculation of the loop assistance quantity of the inertia information, the loop filter order, the loop filter bandwidth, the loop filter realization structure and the loop filter switching application form are mainly comprised; the tracking dynamic performance of a satellite receiver is improved; and the sensitivity of the receiver is improved.

Description

technical field [0001] The invention belongs to the field of baseband signal processing of satellite receivers, and relates to a tracking loop processing method for assisting satellite receivers by using inertial information. Background technique [0002] Inertial navigation system has become an indispensable and important part in the fields of aviation, spaceflight, navigation, land navigation and geodesy due to its outstanding advantages such as autonomy, strong concealment, all-weather, anti-interference, large output information, and strong real-time output information. , but its high precision will decrease with time. [0003] Satellite navigation system (GPS, GLONASS, Beidou, etc.) is a high-precision navigation and positioning system that can provide users with information such as longitude, latitude, altitude, speed, and time, and has been widely used in military and civilian fields. However, due to the limitations of the signal's susceptibility to interference and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 左启耀李育龙胡文涛李峰王黎斌刘峰
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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