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Virginia Tech Radio Astronomy Interference Mitigation Project
Playlist available on 
Steve Ellingson, Principal Investigator
Mike Buehrer, Co-PI
Jordan Budhu
Collaborators
Sean Hum, University of Toronto
Graduate Students
William Howard
Xinrui Li
Ramonika Sengupta (alum)
Yugma Bharat Thakore
Alec Yip
Jet Yu (alum)
Undergraduate Research
Tom Anders
J. Esser
Olivia Leonard
Adam Kimbrough (alum)
Alec Yip (alum)
MOSAIC (2024 Undergrad Project)
J. Andrew
K. Klevar
P. Vangumalla
2023 Senior Design Team
J. Daigle
E. Duval
J. Jamison
S. Taliaferro
C. Van Horn
2022 Undergraduate Program
T. Anders
J. Awad
A. Alonso
Y. Dong
J. DiNiso
J. Velasquez
This is: http://www.faculty.ece.vt.edu/swe/raim
Last update:Apr 6, 2024
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The Radio Astronomy Interference Mitigation Project was established at Virginia Tech in 2019 to advance the state-of-the-art in techniques for mitigation of interference that affects radio astronomy and other passive uses of the radio spectrum.
Here is a snapshot/overview of the project as of Jan 2023:
Techniques for Observing in the Presence of Satellite Interference.
Necessarily excludes much detail, which can be found below.
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Interference Canceling for Improved Coexistence Between Passive and Active Radio Systems
Introduction Video (YouTube)
This work is supported in part by National Science Foundation Grant
ECCS-2029948.
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Electronically-Reconfigurable Surfaces for Improved Coexistence Between Radio Astronomy and Satellite Communications Systems
Introduction Video (YouTube)
Demonstration of Null Tracking (YouTube)
This work is supported in part by National Science Foundation Grant
AST-2128506.
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Journal Papers (reverse chronological order)
- J. Budhu, S.V. Hum, S.W. Ellingson, R.M. Buehrer, "Design of Rim-Located Reconfigurable Reflectarrays for Interference Mitigation in Reflector Antennas", IEEE Trans. Antennas & Propagation, Early Access Jan 17, 2024,
DOI: 10.1109/TAP.2024.3352250.
Preprint: arXiv:2305.18199, [eess.SY] (Dec 21, 2023).
- S.W. Ellingson & R.M. Buehrer, "Coherent Time-Domain Canceling of Interference for Radio Astronomy" (2022), Publ. Astron. Soc. Pac., 134, 114505.
DOI: 10.1088/1538-3873/ac9b92.
- S.W. Ellingson and R. Sengupta, "Sidelobe Modification for Reflector Antennas by Electronically-Reconfigurable Rim Scattering", IEEE Ant. & Wireless Prop. Let., Vol. 20, No. 6, Jun 2021, pp. 1083-7. DOI: 10.1109/LAWP.2021.3072536. Preprint.
Papers in Conferences & Other Meetings (reverse chronological order)
- J. Budhu, S.V. Hum, S. Ellingson, and R.M. Buehrer,
"Loading Rims of Radio Telescopes with Reconfigurable Reflectarrays for Adaptive Null-Steering",
URSI National Radio Science Meeting, Boulder CO, Jan 2024.
DOI: 10.23919/USNC-URSINRSM60317.2024.10464936.
Video.
- S.W. Ellingson, R.M. Buehrer, T. Anders, and X. Li,
"New Results on Mitigation of Satellite Interference by Coherent Time-Domain Canceling",
URSI National Radio Science Meeting, Boulder CO, Jan 2024.
- R. Sengupta & S.W. Ellingson, "Adaptive Antenna Pattern Modeling for Interference Mitigation in Radio Astronomy", IEEE Int'l Conf. on Antenna Measurements & Applications (CAMA), Genoa, Italy, Nov 2023,
DOI: 10.1109/CAMA57522.2023.10352823.
- S.V. Hum, S.W. Ellingson & R.M. Buehrer, "Toward Electronically Reconfigurable Rims for Reflectors in Radio Astronomy",
URSI General Assembly & Sci. Sym., Sapporo, Japan, Aug 2023.
- S.V. Hum, S.W. Ellingson & R.M. Buehrer, "Reflectarray Concept for Interference Mitigation in Radio Astronomy",
IEEE Int'l Ant. & Prop. Sym., Portland OR, July 2023. DOI: 10.1109/USNC-URSI52151.2023.10237818.
- R. Sengupta & S.W. Ellingson, "Effect of Antenna Pattern on Time-Domain Canceling of Interference from Satellites",
IEEE Int'l Ant. & Prop. Sym., Portland OR, July 2023. DOI: 10.1109/USNC-URSI52151.2023.10237408.
- R.M. Buehrer & S.W. Ellingson, "Weight Selection for Pattern Control of Paraboloidal Reflector Antennas with Reconfigurable Rim Scattering",
IEEE Aerospace Conf., Big Sky, MT, March 2023.
DOI: 10.1109/AERO55745.2023.10115669.
Presentation.
- S.W. Ellingson & R.M. Buehrer, "Techniques for Observing in the Presence of Satellite Interference", URSI National Radio Science Meeting, Jan 2023, Video.
- R.M. Buehrer & S.W. Ellingson, "Pattern Control for Reflector Antennas Using Electronically-Reconfigurable Rim Scattering", 2022 IEEE Ant. & Prop. Sym., July 2022. DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886543. Video.
Other Documents & Presentations (reverse chronological order)
- W. Howard, R.M. Buehrer & S.W. Ellingson, "Open and Closed-Loop Weight Selection for Pattern Control of Paraboloidal Reflector Antennas with Reconfigurable Rim Scattering", IEEE Trans. Aerospace & Electronic Systems, submitted.
Preprint: arXiv:2308.16339, [eess.SP] (Aug 30, 2023; 27 Feb 2024).
- R. Sengupta, Adaptive Pattern Modeling for Large Reflector Antennas, MS thesis, July 2022, ETD, Video
- R. Sengupta & S. Ellingson, "A Fast Approximate Method for Calculating the Gain and Pattern of an Axisymmetric Circular Prime-fed Paraboloidal Reflector Antenna", Tech. Rep., Aug 28, 2021. PDF
- S. Ellingson, "Satellite Tracking Data via the Command Line Interface of PREDICT", Tech. Rep., Aug 15, 2021. PDF
- S.W. Ellingson, "Characterization and Mitigation of Sinusoidal Carrier Modulation Signals by Short-Term Sinusoidal Analysis", arXiv:2004.03649 [eess.SP]. (Apr 7, 2020)
"Radio Astronomy Instrumentation" video tutorial playlist
Part 1: Intro |
Part 2: Antennas & Receivers |
Part 3: Back Ends |
Part 4: Sources |
Part 5: Interferometry |
Part 6: Interference
"EM Spectrum Science and Management: Science Fundamentals" course module playlist
"EM Spectrum Science and Management: Engineering Fundamentals" course module playlist
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