Abstract
The paper presents the results of obtained research defining the accuracy of determining the position of a specific object (aircraft, UAV), equipped with a mobile receiver operating the navigation system A-GNSS. The Assisted GNSS technology is designed to improve the performance of the GNSS receiver by reducing the time needed for the receiver to calculate its location. It also increases the sensitivity of the received signal by the receiver, as a result, the accuracy of the determined position of a specific object can be improved. Thanks to its application, the radio-navigation receiver becomes compatible with the requirements of current standards, and what is associated with it this kind of technology has become an important part of the cellular industry. The aim of the article is to examine the solution of A-GPS system and to demonstrate its effectiveness in the process of determining the position of the UAV object. The paper presents aspects of the functionality of the A-GPS system solution work, mathematical model of object position determination using A-GNSS system and discusses the technology that is used for the integration of navigation systems with cellular network. In the final part of the work, based on the analysis of the research literature, the presented mathematical model and simulations, conclusions were formulated, which are reflected in practical applications.
Highlights
Assisted global navigation satellite system A-GNSS (Assisted Global Navigation Satellite System) significantly improves the standard performance of satellite systems by providing information through an alternative communication channel, which is a cellular link, compared to a standard receiver that acquires information from the satellites themselves
It should be noted that the A-GNSS system receiver still performs measurements from satellites, but it can do it faster and with weaker received signals in analogy to the standard receiver
The error of the auxiliary frequency having an influence on the position indication is connected with the error in the observed GPS system signal, because the received Doppler frequency is a function of what the receiver obtains from the satellite
Summary
Assisted global navigation satellite system A-GNSS (Assisted Global Navigation Satellite System) significantly improves the standard performance of satellite systems by providing information through an alternative communication channel, which is a cellular link, compared to a standard receiver that acquires information from the satellites themselves. The assisted A-GPS system functions by providing information that allows the GPS system receiver to determine what frequencies should be expected before sending them, and acquire auxiliary data that provides satellite positioning for use in calculating the position of the receiver. With all this data, the only thing left to do at this time is to measure the range, which can be done in milliseconds [ms], not in minutes [min]. The sensitivity of the A-GPS system receiver is increased, which allows it to obtain signals with much lower power [4], [5]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
