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Satellite search method and receiver

A search method and receiver technology, applied in the field of satellite navigation and positioning, can solve problems such as chain errors, lack of anti-blocking ability, and inability to meet the requirements of receiver search efficiency, and achieve the goal of improving hit rate and satellite search efficiency Effect

Active Publication Date: 2017-03-29
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Only using the average visibility of satellites to adjust the search order of satellites cannot meet the requirements of receiver search efficiency
For example, Chen's algorithm wastes prior information
In addition, Chen's algorithm does not have the ability to resist occlusion. When the receiver fails to capture satellites due to ground obstacles, it will lead to "chain errors" and cause the performance of the algorithm to deteriorate.

Method used

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Embodiment Construction

[0012] The satellite search method disclosed in the present application will be described in detail below with reference to the accompanying drawings. For the sake of brevity, in the descriptions of the embodiments of the present application, the same or similar devices use the same or similar reference numerals.

[0013] figure 1 A flowchart of a satellite search method according to an embodiment of the present application is shown. As shown in the figure, in step 110, a space-time subset and satellite visibility corresponding to the space-time subset are determined. In step 120, according to the confidence that the receiver is located in each space-time grid on the space-time subset and the visibility of the satellite, the search priority of the satellite to be searched is determined. In step 130, satellites are searched according to the priority of the satellites to be searched. Through the method of the present application, the satellite search sequence can be determine...

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Abstract

The invention discloses a satellite search method and a receiver. The satellite search method comprises steps: a spatio-temporal lattice collection and satellite visibility corresponding to the spatio-temporal lattice collection are determined; according to confidence of each spatio-temporal lattice in the spatio-temporal lattice collection where the receiver is located and the satellite visibility, a search optimization level of a to-be-searched satellite is determined; and the satellite is searched according to the search optimization level of the to-be-searched satellite. According to the satellite search method and the receiver, the search sequence of the satellite can be determined according to the confidence and the satellite visibility, the hit rate of capture is improved, and the satellite search efficiency is further improved.

Description

technical field [0001] The application relates to the field of satellite navigation and positioning, in particular to a satellite search method and a receiver. Background technique [0002] With the development of satellite positioning and navigation technology, the requirements for the search speed and search efficiency of the receiver are getting higher and higher. In particular, the current rapid development of various global navigation satellite systems (for example, the GPS global positioning system of the United States, the Beidou system of China, the Galileo system of Europe, the global navigation satellite system of Russia, etc.), requires the receiver to be able to utilize the expanded joint Constellation to improve positioning accuracy and availability. However, the expanded joint constellation also means that the complexity of the receiver's search for satellite signals increases, which limits the positioning speed of the receiver. [0003] In order to improve t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/24G01S19/28
CPCG01S19/24G01S19/28
Inventor 姚铮周衡威陆明泉
Owner TSINGHUA UNIV
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