A cold-start visible star search method for multi-constellation receivers

A search method and receiver technology, applied in the field of satellite navigation, can solve the problem of long time-consuming cold start, and achieve the effect of stabilizing cold start and reducing the time-consuming of cold start

Active Publication Date: 2020-03-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multi-constellation receiver cold-start visible star search method, which overcomes the problem that the multi-constellation receiver cold start takes too long

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A cold-start visible star search method for multi-constellation receivers
  • A cold-start visible star search method for multi-constellation receivers
  • A cold-start visible star search method for multi-constellation receivers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0022] The overall flow chart of this method is as follows figure 1 As shown, the time and almanac are known, and the distribution of satellites is obtained. In the first stage, the initial satellite group is constructed and searched. In the second stage, the marginal satellite group is constructed and searched. In the third stage, the extension and indentation are searched. In the fourth stage, the remaining satellites are searched. Finally complete the cold start. The following work needs to be done:

[0023] 1. Eliminate theoretically invisible satellites

[0024] Suppose a certain visible star is SV1, and another satellite to be tested is SV2, and the instantaneou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-constellation receiver cold start visible satellite searching method. The multi-constellation receiver cold start visible satellite searching method comprises steps that legitimate inference is carried out according to acquired captured visible satellites, and theoretically invisible satellites are eliminated, and therefore a searching range of residual satellites is reduced; four steps adopting different searching orders are designed: a first step of searching an initial satellite group, a second step of searching an edge satellite group, a third step of extending and shrinking the searching, a fourth step of searching the residual satellites. The minimal range of the residual satellites is determined quickly and reasonably, and under conditions with or without shielding, cold start time consumption is effectively reduced.

Description

technical field [0001] The invention relates to a multi-constellation receiver cold-start visible star search method, which belongs to the technical field of satellite navigation. Background technique [0002] Multi-constellation combination positioning is the comprehensive use of satellites of different constellations to help users achieve positioning. GPS in the United States, GLONASS in Russia, GALIEO in the European Union, and Beidou in China can all provide effective observation information. Compared with the traditional single-constellation positioning, multi-constellation combination positioning doubles the observation information, which greatly improves the availability, reliability and accuracy of positioning services. [0003] During the cold start process, the receiver needs to complete a three-dimensional search process, and the three-dimensional uncertainties are visible stars, Doppler frequency shift and code phase. For the two-dimensional search process of Do...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/28
CPCG01S19/28
Inventor 金春杨范胜林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap