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Beidou space-based high-precision differential information receiving implementation method

A technology of differential information and receiving method, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as difficulty in serving large-scale users in a wide area, large-scale applications have not yet been realized, and system capacity is limited, and it can achieve wide-ranging applications. Domain high-precision differential services, overcoming the effect of limited coverage

Inactive Publication Date: 2015-05-13
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

However, the existing ground-based augmentation system has a single means of broadcasting, and the technical system results in limited system capacity, making it difficult to serve large-scale users in wide areas.
my country's satellite navigation ground-based augmentation system is still in the research stage, and domestic ground-based augmentation equipment is also under construction, and large-scale applications have not yet been realized

Method used

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  • Beidou space-based high-precision differential information receiving implementation method
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  • Beidou space-based high-precision differential information receiving implementation method

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0017] The technical features of the embodiment of the present invention are as follows: firstly, the compatibility problem between Beidou satellite-based differential information and GPS differential information is solved, and the Beidou second-generation high-precision differential information is output using a protocol similar to RTCM3.1. Secondly, since different satellites use different information rates to play the differential information, the information of the two satellites is combined to broadcast the differential information, so the tracking, despreading, and demodulation of different satellites in the receiver software adopt different processing methods . The implementation of this method is based on the following conditions: 1. Use two GEO satellites to forwar...

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Abstract

The invention provides a beidou space-based high-precision differential information receiving implementation method. The method comprises the steps of firstly, performing signal capturing based on a matching filter, performing carrier tracking by use of a second-order phase-locked loop, keeping the local code of a receiver and a received signal synchronous by use of a designed code tracking ring, and performing bit synchronization by use of a histogram, next, searching for frame headers from different differential information broadcast by two satellites and completely subframe synchronization, and finally, analyzing the subframe data checked according to the appointment in an ICD file to obtain differential information. According to the beidou space-based high-precision differential information receiving implementation method, a user can receive high-accuracy beidou second generation differential information of the standard format within satellite signal available regions, and therefore, all-weather, continuous and wide-area high-accuracy differential services can be realized.

Description

technical field [0001] The invention relates to a differential information receiving method. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is currently developing at a rapid speed, and its application fields are becoming more and more extensive, which also puts forward higher requirements for the accuracy of navigation and positioning. In order to eliminate errors caused by satellite orbit errors and ionospheric refraction, differential GNSS technology is widely used in satellite positioning. [0003] Differential GNSS positioning (DGNSS) is a widely used real-time positioning technology at present. The purpose of calculating the difference between two observations is to eliminate common items, including common errors and common parameters, which is a method to improve GNSS positioning or timing performance. [0004] The Beidou second-generation satellite navigation and positioning system is an independently dev...

Claims

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Application Information

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IPC IPC(8): G01S19/29G01S19/30
CPCG01S19/29G01S19/30
Inventor 赵爱萍邢燕葛建胡永辉陈颖鸣刘枫成芳
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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