Assessment and Mitigation Approaches of 5G C-band Interference with Aeronautical Radar Altimeter
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Authors
Elsayem, Aisha
Date
2024-08-28
Type
thesis
Language
en
Keyword
5G C-band Interference , Aviation Safety , Signal Propagation , Radar Altimeter
Alternative Title
Abstract
The recent deployment of 5G technology in the C-band has raised concerns regarding potential interference with aeronautical radar altimeters. 5G systems in the C-band operate within a frequency range of 3.7-3.98 GHz, which closely aligns with the operational frequency of radar altimeters, falling within the range of 4.2-4.4 GHz. This proximity in operational frequencies increases the possibility of interference between the two systems. In this thesis, we explore two primary objectives: firstly, to investigate and test the potential for interference between 5G C-band and radar altimeters, and secondly, to develop methods for interference mitigation. To accomplish this, three interference assessment approaches are explored. The first involves statistical interference analysis with randomly generated base stations (BSs) within the altimeter coverage area. The second develops comparative interference analysis with a single BS radiating close to the touch-down point of aircraft. The final approach assesses interference in a real-life scenario where multiple BSs are implemented to serve a real-world runway. Additionally, two interference management techniques were proposed and evaluated within the assessed real-life scenario. The first involves the implementation of adaptive BS using the power control (PC) method, which aims to mitigate interference with minimal impact on coverage by adjusting the transmitting power for the BS that contributes the most to the interference model. A modification to this technique was applied to loop over the coverage areas instead of individual BSs. This technique is useful in scenarios where BSs are implemented close to each other with overlapping coverage. Lastly, a sequential quadratic programming (SQP) optimization algorithm was developed to optimize the locations of BSs, minimizing interference while maintaining coverage. This work has explored the impact of potential interference between 5G in the C-band and radar altimeters and suggested practical methods to allow the coexistence of both systems, thereby ensuring aviation safety and fulfilling the telecommunication sector’s objectives.
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Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
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Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.