GPS with Real Time Kinematics on Communicator 200

• Main Author: Erlendsdottír, Linda Malin
• Format: Others
• Language: English
• Published: KTH, Signalbehandling 2012
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-98759

In today’s heavy-duty vehicles, autonomous systems are used to increase comfort and security by intervening or partially taking over the driver’s tasks. Examples of such existing systems are ABS (Anti Blocking System), EPS (Electronic Stability Program) and ACC (Autonomous Cruise Control). With access to accurate vehicle position these autonomous systems can be developed much further. One way to increase the accuracy is to use Real Time Kinematics (RTK) satellite navigation, which uses data from a fixed reference station (receiver with a known position) and carrier phase estimates, to improve the position estimations. The method has traditionally been used i.a. geodetic surveying, but is continuously expanding to other areas. In this thesis RTK is evaluated, using the open source program RTKLIB 2.4.1 and one of EUREFs reference stations, placed in Mårtsbo outside of Gävle. The best RTK results gave a RMS positioning error of 0.67m in the northern direction and 0.32m in the eastern direction. Overall, the RTKLIB solution did not provide any sufficient improvement over that of the standard absolute positioning method, but it is on par with results obtained by others using RTK open source solutions. The RTK solution needs to be investigated further and recommendations are given on how such an investigation could be performed.