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Publikationer från KTH
Bachelor thesis . 2020
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High Accuracy Positioning

Authors: Yang, Yichen;
Abstract

The thrive of big data, cloud computing, and 5G communication lays a solid foundation for smart transportation and autonomous driving. But in these areas, accurate positioning is also indispensable. Current high accuracy positioning services are mainly based on Network RTK. The PPP technology reaches the same level of final accuracy as RTK but requires less data transmission and computational power. This project focuses on PPP technology and explores its potential as a substitution of the current Network RTK. This thesis consists of three parts: theory, solution, and result. The theory part introduces basic mathematics and an overview of the GPS system. Then it analyses GNSS measurement errors and introduces augmentation technologies. The solution part introduces the measurement model and mainstream error correction methods. After that, it focuses on the ionospheric model and IC-PPP method. Based on that, we create the ’sTEC’ interface and enable the ’External TEC’ correction method. The result part presents a comparison between the PPP technology and different correction methods. Utvecklingen av big data, molntjänster och 5G kommunikation ger en god grund för smarta transporter och självkörande fordon. För dessa tjänster är dock noggrann positionering oumbärligt. Nuvarande positioneringstjänster för hög noggrannhet är framför allt baserade på Network RTK. PPP-teknologi kan nå samma slutliga noggrannhet som RTK, men kräver mindre dataöverföring och beräkningskapacitet. Detta projekt fokuserar på PPP-teknologi och undersöker dess potential att ersätta nuvarande Network RTK. Avhandlingen består av tre delar — teori, lösningar och resultat. Teoridelen introducerar de matematiska grunderna och ger en översikt av GPS-systemet. Därefter analyseras källorna till mätfel i GNSS och olika tilläggsmetoder för att hantera dessa. Lösningsdelen introducerar mätmodellen och vanligt förekommande felkorrigeringsmetoder. Därefter, läggs tyngdpunkten på en jonosfärmodell och IC-PPPmetoden. Baserat på det, skapar vi ett sTEC-gränssnitt för att möjliggöra korrektionsmetoden External TEC. Resultatdelen innehåller en jämförelse mellan PPP-teknologi och olika korrektionsmetoder.

Country
Sweden
Related Organizations
Keywords

Electrical Engineering, Electronic Engineering, Information Engineering, Elektroteknik och elektronik

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
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