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Radio Frequency Interference Suppression in Distributed SAR Constellations

Lukezic, Nikola (2022) Radio Frequency Interference Suppression in Distributed SAR Constellations. Master's, Karlsruhe Institute of Technology (KIT).

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The growing demand for mobile telecommunication, television and radar systems are resulting in the increase of Radio Frequency Interference (RFI). Therefore, RFI is becoming an important factor on system sensitivity and severely degrading the image quality of Synthetic Aperture Radar (SAR) systems. Next generation SAR missions consist of distributed constellations with multiple receive satellites, opening new possibilities for RFI suppression. This thesis presents a novel RFI mitigation technique for distributed SAR constellations. The method is based on spatial filtering to extract the interference signal, using conventional beamforming techniques amongst satellites. The extracted interference is subtracted from the received SAR signal, resulting in RFI removal. The development of a simulator to investigate the mitigation technique is presented and its reliability and performance investigated. In addition, the procedure is studied for multiple satellite constellations and their results on the processed SAR images are presented and discussed. The results show a functioning method, although the SAR data in the position of the RFI and its vicinity is lost. The loss of data is determined by the number of satellites and their spatial constellation. Generally, the performance improves with increasing number of satellites and the loss of data decreases with increasing distance amongst satellites.

Item URL in elib:https://elib.dlr.de/186588/
Document Type:Thesis (Master's)
Title:Radio Frequency Interference Suppression in Distributed SAR Constellations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:25 May 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Distributed SAR Radio Frequency Interference
Institution:Karlsruhe Institute of Technology (KIT)
Department:Institute of Radio Frequency and Electronics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Aircraft SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Lukezic, Nikola
Deposited On:09 Jun 2022 07:22
Last Modified:09 Jun 2022 07:22

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