Publications

Published/Accepted Journal Papers

J. Budhu, S.V. Hum, S. Ellingson, R.M. Buehrer, "Design of Rim-Located Reconfigurable Reflectarrays for Interference Mitigation in Reflector Antennas", IEEE Trans. Ant. & Prop., Vol. 72, No. 4, April 2024, pp. 3736-41. DOI: 10.1109/TAP.2024.3352250. Preprint: arXiv:2305.18199 [eess.SY]. (May 29, 2023; 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. Preprint: arXiv:2208.04256 [astro-ph.IM] (Aug 8, 2022; Oct 23, 2022).

E. Kucukdeger, Y. Tong, M. Singh, J. Zhang, L.K. Harding, A. Salado, S.W. Ellingson, B.N. Johnson, "Conformal 3D Printing of Non-planar Antennas on Wrinkled and Folded Kapton Films using Point Cloud Data", Flexible and Printed Electronics, Vol. 6, No. 4, Oct 2021, 044002. DOI: 10.1088/2058-8585/ac28f1.

S.W. Ellingson and R. Sengupta, "Sidelobe Modification for Reflector Antennas by Electronically-Reconfigurable Rim Scattering", IEEE Antennas & Wireless Propagation Letters, Vol. 20, No. 6, Jun 2021, pp. 1083-7. DOI: 10.1109/LAWP.2021.3072536. Preprint.

G. Golpayegani, D.R. Lorimer, S.W. Ellingson, D. Agarwal, O. Young, F. Ghigo, R. Prestage, K. Rajwade, M.A. McLaughlin, M. Mingyar, "GBTrans: A Commensal Search for Radio Pulses with the Green Bank 20-m Telescope," Mon. Not. Royal Astr. Soc., Vol. 489, No. 3, Nov 2019, pp. 4001-6. Preprint.

M.W. Eastwood, M.M. Anderson, R.M. Monroe, G. Hallinan, B.R. Barsdell, S.A. Bourke, M.A. Clark, S.W. Ellingson, J. Dowell, H. Garsden, L.J. Greenhill, J.M. Hartman, J. Kocz, T.J.W. Lazio, D.C. Price, F.K. Schinzel, G.B. Taylor, H.K. Vedantham, Y. Wang, D.P. Woody, "The Radio Sky at Meter Wavelengths: m-mode Analysis Imaging with the OVRO-LWA," Astronomical J., Vol. 156, No. 1, 29 June 2018, p. 32 (23 pp.). Preprint.

D.C. Price, L.J. Greenhill, A. Fialkov, G. Bernardi, H. Garsden, B.R. Barsdell, J. Kocz, M.M. Anderson, S.A. Bourke, J. Craig, M.R. Dexter, J. Dowell, M.W. Eastwood, T. Eftekhari, S.W. Ellingson, G. Hallinan, J.M. Hartman, R. Kimberk, T.J.W. Lazio, S. Leiker, D. MacMahon, R. Monroe, F. Schinzel, G.B. Taylor, E. Tong, D. Werthimer, D.P. Woody, "Design and Characterization of the Large-aperture Experiment to Detect the Dark Age (LEDA) Radiometer Systems," Mon. Not. Royal Astr. Soc., Vol. 476, No. 1, 1 May 2018, 16 May 2018, pp. 12-26. Preprint.

S.W. Ellingson, "An Introduction to GTD Edge Diffraction via Equivalent Currents", IEEE Ant. & Prop. Mag., Vol. 59, No. 4, Aug 2017, pp. 94-99.

G. Bernardi, J.T.L. Zwart, D. Price, L.J. Greenhill, A. Mesinger, J. Dowell, T. Eftekhari, S.W. Ellingson, J. Kocz, F. Schinzel, "Bayesian constraints on the global 21-cm signal from the Cosmic Dawn" (2016), Mon. Not. Royal Astron. Soc., Vol. 461, No. 3, pp. 2847-55. Preprint.

R.H. Tillman, S.W. Ellingson, and J. Brendler, "Practical Limits in the Sensitivity-Linearity Trade off for Radio Telescope Front Ends in the HF and VHF-low Bands" (2016), J. Astronomical Instrumentation, Vol. 5, No. 2, 1650004, 15 pp.

S.E. Cutchin, J.H. Simonetti, S.W. Ellingson, A.S. Larracuente, M.J. Kavic, "Constraining the Rate of Primordial Black-Hole Explosions and Extra Dimension Scale using a Low-Frequency Radio Antenna Array", Pub. Astr. Soc. Pacific, Vol. 127, No. 958 (December 2015), pp. 1269-1278.

J. Kocz, L.J. Greenhill, B.R. Barsdell, D. Price, G. Bernardi, S. Bourke, M.A. Clark, J. Craig, M. Dexter, J. Dowell, T. Eftekhari, S. Ellingson, G. Hallinan, J. Hartman, A. Jameson, D. MacMahon, G. Taylor, F. Schinzel, D. Werthimer (2015), "Digital Signal Processing using Stream High Performance Computing: A 512-input Broadband Correlator for Radio Astronomy", J. Astronomical Instrumentation, Vol. 4, No. 1, 1550003, 12 pp.

T.E. Clarke, C.A. Higgins, J. Skarda, K. Imai, M. Imai, F. Reyes, J. Thieman, T. Jaeger, H. Schmitt, N. Paravastu Dalal, J. Dowell, S. W. Ellingson, B. Hicks, F. Schinzel, G.B. Taylor, "Probing Jovian Decametric Emission with the Long Wavelength Array Station 1", J. Geophysical Reseach: Space Physics, Vol. 119, No. 12, Dec 2014, pp. 9508-26. Preprint version

K. Obenberger, G. Taylor, J. Hartman, J. Dowell, S. Ellingson, J.F. Helmboldt, P. Henning, M. Kavic, F. Schinzel, J. Simonetti, K. Stovall, T.L. Wilson (2014)," Detection of Radio Emission from Fireballs", Astrophysical Journal Letters, 788, L26. Preprint version

J.F. Helmboldt, S.W. Ellingson, J.M. Hartman, T.J.W. Lazio, G.B. Taylor, T.L. Wilson, C.N. Wolfe (2014), "All-sky imaging of meteor trails at 55.25 MHz with the first station of the Long Wavelength Array", Radio Science, 49, 157-180, DOI: 10.1002/2013RS005220.

J. Dowell, P.S. Ray, G.B. Taylor, J.N. Blythe, T. Clarke, J. Craig, S.W. Ellingson, J.F. Helmboldt, P.A. Henning, T.J.W. Lazio, F. Schinzel, K. Stovall, and C.N. Wolfe 2013, Detection and Flux Density Measurements of the Millisecond Pulsar J2145-0750 below 100 MHz, Astrophysical Journal Letters, 775, L28. Preprint version

J.F. Helmboldt, T.E. Clarke, J. Craig, J.D. Dowell, S.W. Ellingson, J.M. Hartman, B.C. Hicks, N.E. Kassim, G.B. Taylor, and C.N. Wolfe (2013), "Passive All-Sky Imaging in the HF Regime with WWV the first station of the Long Wavelength Array", Radio Sci., 48, 491-512, DOI: 10.1002/rds.20056.

S.W. Ellingson, T.E. Clarke, J. Craig, B.C. Hicks, T.J.W. Lazio, G.B. Taylor, T.L. Wilson and C.N. Wolfe 2013, "Observations of Crab Giant Pulses in 20-84 MHz using LWA1", Astrophysical Journal, 768, 136. Preprint.

S.W. Ellingson, G.B. Taylor, J. Craig, J. Hartman, J. Dowell, C.N. Wolfe, plus 7 others, "The LWA1 Radio Telescope", IEEE Trans. Ant. & Prop., Vol. 61, No. 5, May 2013, pp. 2540-9. Preprint Version.

G.B. Taylor, S.W. Ellingson, N.E. Kassim, J. Craig, J. Dowell, C.N. Wolfe, plus 29 others (2012), "First Light for the First Station of the Long Wavelength Array", J. Astronomical Instrumentation, Vol. 1, No. 1, 1250004 (20 pp.). DOI: 10.1142/S2251171712500043.

S.M.S. Hasan & S.W. Ellingson, "Integration of Simple Antennas to Multiband Receivers using a Novel Multiplexer Design Methodology", IEEE Trans. Ant. & Prop., Vol. 60, No. 3, March 2012, pp. 1550-6.

M. Harun & S.W. Ellingson (2011), "Design and Analysis of Low Frequency Strut-Straddling Feed Arrays for EVLA Reflector Antennas", Radio Sci., 46, RS0M04, DOI:10.1029/2011RS004710.

S.W. Ellingson, "Sensitivity of Antenna Arrays for Long-Wavelength Radio Astronomy", IEEE Trans. Antennas and Propagation, Vol. 59, No. 6, June 2011, pp. 1855-1863.

S.W. Ellingson, T.E. Clarke, A. Cohen, N.E. Kassim, Y. Pihlstrom, L. J Rickard, and G.B. Taylor, "The Long Wavelength Array", Proc. IEEE, Vol. 97, No. 8, Aug 2009, pp. 1421-1430. DOI: 10.1109/JPROC.2009.2015683.

M. Kavic, J.H. Simonetti, S.E. Cutchin, S.W. Ellingson, and C.D. Patterson, "Transient Pulses from Exploding Primordial Black Holes as a Signature of an Extra Dimension", J. Cosmology and Astroparticle Physics, No. 11, 2008, 017 (10pp). DOI: 10.1088/1475-7516/2008/11/017.

C. Patterson, S. Ellingson, B. Martin, K. Deshpande, J. Simonetti, M. Kavic, and S. Cutchin, "Searching for Transient Pulses with the ETA Radio Telescope", ACM Trans. Reconfigurable Technology & Systems, Vol. 1, No. 4, Art. 20 (19pp), Jan. 2009. DOI: 10.1145/1462586.1462589.

A.B. MacKenzie, J.H. Reed, P. Athanas, C.W. Bostian, R.M. Buehrer, L.A. DaSilva, S.W. Ellingson, Y.T. Hou, M. Hsiao, J.-M. Park, C. Patterson, S. Raman, and C.R.C.M. da Silva, "Cognitive Radio and Networking Research at Virginia Tech", Proc. IEEE, Vol. 97, No. 4, pp. 660-688, April 2009. DOI: 10.1109/JPROC.2009.2013022.

K.W. Hurst and S.W. Ellingson, "Path Loss from a Transmitter Inside an Aircraft Cabin to an Exterior Fuselage-Mounted Antenna", IEEE Trans. Electromagnetic Compatibility, Vol. 50, No. 3, August 2008, pp. 504-512. DOI: 10.1109/TEMC.2008.926880.

S.W. Ellingson and M. Harun, "Lateral Position Dependence of MIMO Capacity in a Hallway at 2.4 GHz," IEEE Trans. Antennas and Propagation, Vol. 56, No. 2, February 2008, pp. 515-523. DOI: 10.1109/TAP.2007.915431.

S.W. Ellingson, G.A. Hampson, and R.K. Childers, "Argus: An L-Band All-Sky Astronomical Surveillance System", IEEE Trans. Antennas & Propagation, Vol. 56, No. 2, February 2008, pp. 294-302. DOI: 10.1109/TAP.2007.915467.

S.W. Ellingson, J.H. Simonetti, and C.D. Patterson, "Design and Evaluation of an Active Antenna for a 29-47 MHz Radio Telescope Array," IEEE Trans. Antennas and Propagation, Vol. 55, No. 3, March 2007, pp. 826-831. DOI: 10.1109/TAP.2007.891866.

J.T. Johnson, A.J. Gasiewski, B. Guner, G.A. Hampson, S.W. Ellingson, R. Krishnamachari, N. Niamsuwan, E. McIntryre, M. Klein, and V. Leuski, "Airborne Radio Frequency Interference Studies at C-band using a Digital Receiver", IEEE Trans. Geoscience and Remote Sensing, Vol. 44, No. 7, July 2006, pp. 1974-85. DOI: 10.1109/TGRS.2006.872523.

S.W. Ellingson and J.T. Johnson, "A Polarimetric Survey of Radio Frequency Interference in C- and X-Bands in the Continental United States using WindSat Radiometry", IEEE Trans. Geoscience and Remote Sensing, Vol. 44, No. 3, March 2006, pp. 540-8. DOI: 10.1109/TGRS.2005.856131.

S.W. Ellingson, "Antennas for the Next Generation of Low Frequency Radio Telescopes," IEEE Trans. Antennas and Propagation, Vol. 53, No. 8, August 2005, pp. 2480-9. DOI: 10.1109/TAP.2005.852281.

S.W. Ellingson (2005), "Introduction to special section on Mitigation of Radio Frequency Interference in Radio Astronomy", Radio Science, 40, RS5S01, DOI:10.1029/2005RS003268.

N. Niamsuwan, J.T. Johnson, and S.W. Ellingson (2005), "Examination of a simple pulse-blanking technique for radio frequency interference mitigation", Radio Science, 40, RS5S03, doi:10.1029/2004RS003155.

S.W. Ellingson, "RFI Mitigation and the SKA," Experimental Astronomy, Vol. 17, No. 1-3, Jun 2004, pp. 261-7. Reprinted in The Square Kilometre Array: An Engineering Perspective, P.J. Hall (ed.), Springer, 2005. DOI: 10.1007/1-4020-3798-8_24.

S.W. Ellingson and G.A. Hampson, "Mitigation of Radar Interference in L-Band Radio Astronomy", Astrophysical Journal Supplement Series, 147(1):167-176 (July 2003). DOI: 10.1086/375025.

S.W. Ellingson, "Beamforming and Interference Canceling with Very Large Wideband Arrays", IEEE Trans. Antennas and Propagation, Vol. 51, No. 6, June 2003, pp. 1338-46. DOI: 10.1109/TAP.2003.812237.

S.W. Ellingson and W. Cazemier, "Efficient Multibeam Synthesis with Interference Nulling for Large Arrays", IEEE Trans. Antennas and Propagation, Vol. 51, No. 3, March 2003, pp. 503-511. DOI: 10.1109/TAP.2003.809840.

I.J. Gupta, J.R. Baxter, S.W. Ellingson, H.-G. Park, H.S. Oh, and M.G. Kyeong, "An Experimental Study of Antenna Array Calibration", IEEE Trans. Antennas and Propagation, Vol. 51, No. 3, March 2003, pp. 664-667. DOI: 10.1109/TAP.2003.809870.

E. Ranu and S.W. Ellingson, "A Low-Cost Wideband UHF Downconverter with 5:1 Tuning Range", IEEE Trans. Instrumentation and Measurement, Vol. 51, No. 5, Oct 2002, pp. 1080-1084. DOI: 10.1109/TIM.2002.806020.

S.W. Ellingson and G.A. Hampson, "A Subspace-Tracking Approach to Interference Nulling for Phased Array-Based Radio Telescopes", IEEE Trans. Antennas and Propagation, Vol. 50, No. 1, Jan 2002, pp. 25-30. DOI: 10.1109/8.992558.

S.W. Ellingson, J. Bunton, and J.F. Bell, "Removal of the GLONASS C/A Signal from OH Spectral Line Observations Using a Parametric Modelling Technique", Astrophysical Journal Supplement, Vol. 135, No. 1, pp. 87-93 (July 2001). DOI: 10.1086/321780.

S.W. Ellingson, "Design and Evaluation of a Novel Antenna Array for Azimuthal Angle-of-Arrival Measurement", IEEE Trans. Ant. & Prop., Vol. 49, No. 6, June 2001, pp. 971-979. DOI: 10.1109/8.931156.

S.W. Ellingson, I.J. Gupta, and W.D. Burnside, "Analysis of Blended Rolled Edge Reflectors Using Numerical UTD", IEEE Trans. Ant. & Prop., Vol. 38, No. 12, December 1990, 1969-1971. DOI: 10.1109/8.60989.

Books, Book Chapters, and Other Book-Like Pubs

S.W. Ellingson, Radio Systems Engineering, Revised First Edition, VT Publishing, 2023. ISBN: 978-1-957213-76-7; https://doi.org/10.21061/radiosystemsengineering-revised1st.

S.W. Ellingson and G.B. Taylor, "Low Frequency Arrays," chapter in Radio Astronomical Instrumentation, Vol. 5 of D. N. Burrows (Ed.), Handbook of Astronomical Instrumentation, World Scientific Publishing, May 2020, 20 pp. ISBN 978-981-4644-31-0, DOI: 10.1142/9446.

S.W. Ellingson, Electromagnetics, Vol. 2, VT Publishing, 2020 (ISBN 9781949373929, https://doi.org/10.21061/electromagnetics-vol-2, CC BY-SA 4.0)

S.W. Ellingson, Electromagnetics, Vol. 1, VT Publishing, 2018 (ISBN 9780997920185, https://doi.org/10.21061/electromagnetics-vol-1, CC BY-SA 4.0)

S.W. Ellingson, Radio Systems Engineering, Cambridge University Press, 2016. (ISBN: 9781107068285). Superceeded by Revised First Edition (2023); see above

S.W. Ellingson, "Antennas in Radio Telescope Systems", in Handbook of Antenna Technologies, Z.N. Chen (Ed.), Springer, 2015. (DOI: 10.1007/978-981-4560-75-7_124-1, ISBN: 978-981-4560-75-7)

National Research Council, Views of the NAS and NAE on Agenda Items at Issue at the World Radiocommunication Conference 2012, National Academies Press, 2011. (Contributions as member of the National Academies' "Committee on Radio Frequencies".)

National Research Council, Spectrum Management for Science in the 21st Century, National Academies Press, 2009. (Contributions as member of the authoring committee on Survey of the Scientific Uses of the Radio Spectrum.)

National Research Council, Handbook of Frequency Allocations and Spectrum Protection for Scientific Uses, National Academies Press, 2007. (Contributions as member of the authoring "Panel on Frequency Allocations and Spectrum Protection for Scientific Uses" of the National Academies' "Committee on Radio Frequencies".)

S.W. Ellingson (ed.), Special Section on RFI Mitigation for Radio Astronomy, Radio Science, in press. Introduction paper: S.W. Ellingson, "Introduction to the Special Section on RFI Mitigation for Radio Astronomy" (PDF), Radio Science, 40, RS5S01, doi:10.1029/2005RS003268.

Proceedings of the Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy (RFI2004), Penticton, BC, Canada, July 16-18, 2004. Co-Chairs: S.W. Ellingson and F.H. Briggs.

J. Tarter, J. Dreher, S.W. Ellingson, and W.J. Welch, "Recent Progress and Activities in the Search for Extraterrestrial Intelligence (SETI)", Chapter 36 of Review of Radio Science, 1999-2002, W. Ross Stone (Ed.), IEEE Press/John Wiley, 2002.

Preprints

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", arXiv:2308.16339 [eess.SP] (Aug 30, 2023; 27 Feb 2024).

S.W. Ellingson, "Characterization and Mitigation of Sinusoidal Carrier Modulation Signals by Short-Term Sinusoidal Analysis", arXiv:2004.03649 [eess.SP]. (Apr 7, 2020)

Reviewed Conference Publications

J. Budhu, S.V. Hum, S. Ellingson, and R.M. Buehrer, "Loading Rims of Radio Telescopes with Reconfigurable Reflectarrays for Adaptive Null-Steering", USNC-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, "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, Mar 2023. DOI: 10.1109/AERO55745.2023.10115669.

R.M. Buehrer & S.W. Ellingson, "Pattern Control for Reflector Antennas Using Electronically-Reconfigurable Rim Scattering", 2022 IEEE Ant. & Prop. Sym., Denver, CO, July 2022. DOI: 10.1109/AP-S/USNC-URSI47032.2022.9886543. Video.

S.W. Ellingson, "Path Loss in Reconfigurable Intelligent Surface-Enabled Channels", IEEE Int'l Sym. Personal, Indoor and Mobile Radio Communications (PIMRC), Virtual, Sep 2021. DOI: 10.1109/PIMRC50174.2021.9569465. Preprint. Video.

S.W. Ellingson, "Simple Pattern Synthesis for Complicated Arrays", USNC-URSI National Radio Science Meeting, Boulder, CO, Jan 2021. DOI: 10.23919/USNC-URSINRSM51531.2021.9336485. Video.

S.W. Ellingson and A. Marinkovich, "Discovery of Blocking Terrain in a Millimeter-Wave Network by On-the-Fly Incoherent Tomography", IEEE Int'l Symp. on Ant. & Prop., Boston, MA, July 2018. DOI: 10.1109/APUSNCURSINRSM.2018.8609199.

S.W. Ellingson, "The Modified J-Pole: A Wideband End-Fed Half-Wave Dipole for a VHF Reflector Feed System", IEEE Int'l Symp. on Ant. & Prop., San Diego, CA, July 2017, pp. 773-5. DOI: 10.1109/APUSNCURSINRSM.2017.8072429.

S.W. Ellingson, "Continuous Updating of Radio Environment Maps for Millimeter-Wave Networks with Beamforming", IEEE Int'l Symp. on Ant. & Prop., San Diego, CA, July 2017, pp. 937-8. DOI: 10.1109/APUSNCURSINRSM.2017.8072511.

A. Gaber, R.H. Tillman, R.M. Buehrer, and S. Ellingson, "Sensitivity Analysis of Localization Using Discrete Astronomical Radio Sources", IEEE Wireless Communications and Networking Conference (WCNC), San Francisco, CA, Mar 2017.

S. Ellingson & R.M. Buehrer, "Frequency Channel Delay Modulation for Interference-Robust Low Data Rate Communication", IEEE MILCOM, Baltimore, MD, Nov 2016.

A. Gaber, R.H. Tillman, R.M. Buehrer, and S. Ellingson, "Navigating via Discrete Astronomical Radio Sources: Geolocalization Using Fringe Rates", IEEE ION Position, Location and Navigation Symposium (PLANS), Savannah GA, Apr 2016.

R.H. Tillman and S.W. Ellingson, "Broadband VHF Radiometry with a Notch-Filtered Antenna Exhibiting a Large Impedance Mismatch", IEEE Int'l Symp. on Ant. & Prop., July 2015, Vancouver BC, pp. 1696-7.

S.W. Ellingson, J. Craig, J. Dowell, G.B. Taylor and J.F. Helmboldt, "Design and Commissioning of the LWA1 Radio Telescope", 2013 IEEE Int'l Symp. on Phased Array Systems & Technology, Boston MA, Oct 15-18 2013, pp. 776-783. preprint version.

R.H. Tillman and S.W. Ellingson, "Active Antennas for 20-90 MHz: Examples and Practical Limits", 2013 IEEE Int'l Symp. on Ant. & Prop., July 7-13 2013, Orlando FL, pp. 1266-7.

S.W. Ellingson, "Analysis of Antennas as Components of Broadband and Multiband LMR Systems", IEEE 2011 Int'l Symp. on Ant. & Prop., July 6, 2011, Spokane WA, pp. 2028-2031.

P. Henning, S.W. Ellingson, G.B. Taylor, J. Craig, Y. Pihlstrom, L. J Rickard, T.E. Clarke, N.E. Kassim, and A. Cohen, "The First Station of the Long Wavelength Array," Int'l Square Kilometer Array Forum, Assen, The Netherlands, June 9-16, 2010.

S.M. Shajedul Hasan and S.W. Ellingson, "Multiband Public Safety Radio using a Multiband RFIC with an RF Multiplexer-based Antenna Interface," Software Defined Radio (SDR) '08, Washington DC, October 2008. Presentation slides.

S.W. Ellingson and N.E. Kassim, "LWA Station Design", 2008 URSI General Assembly, Chicago, August 11, 2008.

K.W. Hurst and S.W. Ellingson, "Path Loss from a Transmitter Inside an Aircraft Cabin to an Exterior Fuselage-Mounted Antenna", Proc. IEEE 2008 Int'l Symp. on Ant. and Prop., San Diego, CA, July 2008. See also the presentation slides.

S.M. Shajedul Hasan and S.W. Ellingson, "Multiband Antenna-Receiver Integration using an RF Multiplexer with Sensitivity-Constrained Design, IEEE 2008 Int'l Symp. on Ant. and Prop., San Diego, CA, July 2008. See also the presentation slides.

C. Patterson, B. Martin, S. Ellingson, J. Simonetti, and S. Cutchin, "FPGA Cluster Computing in the ETA Radio Telescope", ICFPT 2007 (2007 Int'l Conf. on Field-Programmable Technology), Kitakyusyu, Japan, 12-14 Dec 2007, pp. 25-32.

S.W. Ellingson, "Effective Aperture of a Large Pseudorandom Low-Frequency Dipole Array," 2007 IEEE Int'l Ant. & Prop. Symp., Honolulu, HI, 9-15 Jun 2007, pp. 1501-4. See also the presentation slides (PDF, 1.6MB).

S.W. Ellingson, C.D. Patterson, J.H. Simonetti, "Design and Demonstration of an Antenna for a New 29 - 47 MHz Radio Telescope Array" (PDF), 2006 IEEE Int'l Ant. and Prop. Symp., Albuquerque, NM, July 2006, pp. 339-342. See also the presentation slides (PDF, 863KB).

S.W. Ellingson and D.W. Taylor, "Measurement of MIMO Capacity in a Hallway at 2.4 GHz" (PDF), 2006 IEEE Int'l Ant. and Prop. Symp., Albuquerque, NM, July 2006, pp. 4811-4814. See also the presentation slides (PDF, 944KB).

S.W. Ellingson, "Antenna Design and Site Planning Considerations for MIMO", IEEE Vehicular Technology Conf. 2005 Fall - Dallas, Vol. 3, pp. 1718-22, September 2005. See also the presentation slides (PDF, 1.4MB).

S.W. Ellingson, "Spectral Occupancy at VHF: Implications for Frequency-Agile Cognitive Radios" (PDF), IEEE Vehicular Technology Conf. 2005 Fall - Dallas, Vol. 2, pp. 1379-82, September 2005. See also the presentation slides (PDF, 1.7MB).

D.J. Lyons and S.W. Ellingson, "Robust Open-Loop Downlink Beamforming with Time-Switched Diversity" (PDF), IEEE Vehicular Technology Conf. 2005 Fall - Dallas, Vol. 2, pp. 972-6, September 2005.

S.W. Ellingson, "A Flexible 4 x 16 MIMO Testbed with 250 MHz - 6 GHz Tuning Range" (PDF), 2005 IEEE Int'l Ant. and Prop. Symp., Washington, DC, July 2005 (2A:309-312). See also the presentation slides (PDF, 6.2MB), which contain significantly updated information.

S.W. Ellingson and A. Kerkhoff, "Comparison of Two Candidate Elements for a 30-90 MHz Radio Telescope Array" (PDF), 2005 IEEE Int'l Ant. and Prop. Symp., Washington, DC, July 2005 (1A: 590-3).

A. Kerkhoff and S.W. Ellingson, "A Wideband Planar Dipole Antenna for Use in the Long Wavelength Demonstrator Array (LWDA)," 2005 IEEE Int'l Ant. and Prop. Symp., Washington, DC, July 2005, (1B: 553-6).

S.W. Ellingson and T.C. Kramer, "Sensitivity and Bandwidth of Low-Gain Active Antennas Below 100 MHz" (PDF), 2005 IEEE Int'l Ant. and Prop. Symp., Washington, DC, July 2005 (3A: 561-4).

J. T. Johnson, A. J. Gasiewski, G. A. Hampson, S. W. Ellingson, R. Krishnamarachi, and M. Klein, "Airborne radio frequency interference studies at C-band using a digital receiver," IEEE Geoscience and Remote Sensing Symposium, Anchorage, AK, Sep 2004 (3:1687-1690).

J. T. Johnson, G. A. Hampson, and S. W. Ellingson, "Design and demonstration of an interference suppressing microwave radiometer," IEEE Geoscience and Remote Sensing Symposium, Anchorage, AK, Sep 2004 (3:1683-1686).

S.W. Ellingson and G.A. Hampson, "Detection and Localization of L-Band Satellites Using an Antenna Array", 2004 IEEE Antennas & Propagation Soc. Int'l Symposium, Monterey, CA, June 2004 (1:177-180).

G.A. Hampson, S.W. Ellingson, and J.T. Johnson, "Design and Demonstration of an Interference Suppressing Microwave Radiometer", (PDF) 2004 IEEE Aerospace Conference, Big Sky, MT, March 2004 (2:993-999). Also, here are the presentation slides (PDF).

S.W. Ellingson, G.A. Hampson, and J.T. Johnson, "Characterization of L-Band RFI and Implications for Mitigation Techniques", IEEE 2003 Intn'l Geoscience and Remote Sensing Symposium (IGARSS 2003), Toulouse, July 2003 (3:1745-7).

S.W. Ellingson, G.A. Hampson, and J.T. Johnson, "Design of an L-Band Microwave Radiometer with Active Mitigation of Interference", IEEE 2003 Intn'l Geoscience and Remote Sensing Symposium (IGARSS 2003), Toulouse, July 2003 (3:1751-3).

S.W. Ellingson, "Detection of Tones and Pulses using a Large, Uncalibrated Array", 2003 IEEE Antennas & Propagation Soc. Int'l Symposium, Columbus, OH, June 2003 (4:196-9).

S.W. Ellingson, "Effects of Angle Spread in a Complex Outdoor Environment At 2.4 GHz", 2003 IEEE Antennas & Propagation Soc. Int'l Symposium, Columbus, OH, June 2003 (3:264-7).

S.W. Ellingson, "Vector Channel Coherence in a Complex Outdoor Environment At 2.4 GHz", 2003 IEEE Antennas & Propagation Soc. Int'l Symposium, Columbus, OH, June 2003 (4:208-11).

S.W. Ellingson and G.A. Hampson, "Argus: an L-Band Array for Detection of Astronomical Transients", 2003 IEEE Antennas & Propagation Soc. Int'l Symposium, Columbus, OH, June 2003 (3:256-9).

I.J. Gupta and S.W. Ellingson, "Adaptive Antenna Research At the ElectroScience Laboratory," 2003 IEEE Antennas & Propagation Soc. Int'l Symposium, Columbus, OH, June 2003 (4:590-3).

S.W. Ellingson, "Capabilities and Limitations of Adaptive Canceling for Microwave Radiometry", IEEE 2002 Intn'l Geoscience and Remote Sensing Symposium (IGARSS 2002), Toronto, June 2002 (3:1685-7).

S. Yano and S.W. Ellingson, "Design and Evaluation of a Self-Referencing UHF Ultrawideband Channel Sounder", IEEE 2001 Antennas and Propagation Society International Symposium, Boston, July 2001 (4:588-91).

S.W. Ellingson, H.J. Kim, and K.S. Ayotte, "Low-Cost Adaptive Arrays for Analysis of Wireless Systems", 1999 IEEE Antennas & Propagation Soc. Int'l Symposium, Orlando, FL, July 1999 (2:1100-3).

S.W. Ellingson and M.P. Fitz, "A Software Radio Based System for Experimentation in Wireless Communications", 1998 IEEE Vehicular Technology Conference, Ottawa, ON, May 1998 (3:2348-52).

Workshops and Other Meetings

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.

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.W. Ellingson & R.M. Buehrer, "Techniques for Observing in the Presence of Satellite Interference", URSI National Radio Science Meeting, Bolder CO, Jan 2023, Video.

S.W. Ellingson, "Radio Astronomy Instrumentation" (tutorial), National Radio Dynamic Zone Partnership Workshop #1: Passive/Active Communities Working Together: Understanding Each Other's Needs, Concerns, and Capabilities, virtual, March 2021. Also available as a 6-part series on YouTube.

S.W. Ellingson, "Signal Processing Methods for Mitigation of Radio Frequency Interference in the Era of Real-Time Astronomy" (Invited Distinguished Symposium Talk), IEEE Global Conf. on Signal and Interference Processing (GlobalSIP 2018), Anaheim, CA, Nov 2018.

R.S. Lynch, D. Lorimer, S. Ellingson, K. Bandura, and M. McLaughlin, "LASA and WFBT: Two Concepts for an All-Sky Radio Transient Telescope", Towards an All-Sky Radio SETI Telescope (workshop), Manchester UK, Oct 2018.

S. Ellingson, "Updating an Undergraduate RF Electronics Course" (presentation in RF Educators Forum), IEEE Wireless and Microwave Technology Conf. (WAMICON), Clearwater FL, April 2018.

S. Ellingson, "The Open Electromagnetics Project" (invited talk), Virginia Tech Authors Event 2018, Blacksburg VA, Mar 2018.

S. Ellingson, "The Open Electromagnetics Project" (lightning round talk), Open Education 2018 Symposium, Blacksburg VA, Mar 2018.

A.R. Walz and S. Ellingson, "Adaptable Course Materials: Creating an Open Textbook for Electromagnetics", Conf. on Higher Education Pedagogy (workshop), Blacksburg VA, 2018/2/15.

S.W. Ellingson, "A New VHF ("4-Band") Feed System for the Very Large Array", URSI National Radio Science Meeting, Boulder, CO, Jan 2016.

R.H. Tillman and S.W. Ellingson, "Interferometric Measurement of the Absolute Flux Density of Bright Unresolved Sources Below 100 MHz", URSI National Radio Science Meeting, Vancouver BC, July 2015.

R.H. Tillman and S.W. Ellingson, "Measurement of Absolute Flux Densities for Meter-Wavelength Calibration Sources", URSI National Radio Science Meeting, Boulder, CO, Jan 2014.

S. Ellingson on behalf of the LWA1 Radio Observatory, "LWA1 Status and First Science Results", Low Frequency Radio Astronomy Meeting (workshop organized by NRAO), Arlington VA, August 27-28, 2013.

S. Ellingson, "LWA1 Technical Status", LWA1 Users Meeting, Arlington VA, August 29, 2013.

S.W. Ellingson, "LWA1 Design, Commissioning, and First Science Results", NRAO Green Bank Colloquium, Green Bank, WV, May 8, 2013.

S.W. Ellingson on behalf of the LWA1 Radio Observatory, "LWA1, Crab Giant Pulses, and a Commensal Search for other Short Dispersed Pulses", The Modern Radio Universe 2013, Bonn, Germany, April 22-26, 2013.

S.W. Ellingson on behalf of the LWA1 Radio Observatory, "Electromagnetic Characterization of the LWA1 Antenna Array", URSI National Radio Science Meeting, Boulder, CO, Jan 11, 2013.

S.W. Ellingson on behalf of the LWA1 Radio Observatory, "Searching for Short Dispersed Pulses with LWA1", URSI National Radio Science Meeting, Boulder, CO, Jan 11, 2013.

A. Larracuente, M. Kavic, S. Cutchin, J.H. Simonetti, S. Ellingson, "Searching for Primordial Black Holes & an Extra Spatial Dimension", Paper 143.02, 221th Am. Astro. Soc. Meeting, Jan 2013.

L.J. Greenhill, D. Werthimer, G.B. Taylor, S.W. Ellingson, "A Broadband 512-Element Full Correlation Imaging Array at VHF (LEDA)", 2012 Intl. Conf. Electromagnetics in Adv. Applications (ICEAA), Cape Town, South Africa, September 2-7, 2012. pp. 1117-20.

S. Ellingson, "LWA1 Technical Status" and "Short Dispersed Transients", LWA1 Users Meeting, Albuquerque NM, July 26-27, 2012.

L.J. Greenhill, D. Werthimer, G.B. Taylor, S.W. Ellingson, "HI at z~20: The Large Aperture Experiment to Detect the Dark Ages", Paper 104.03, 220th Am. Astro. Soc. Meeting, Anchorage AK, June 10-14, 2012.

M. Kavic, J. Simonetti, P. Shawhan, C. Yancey, J. Kanner, S. Cutchin, S. Ellingson, "A Multi-Messenger Search for Radio Transients and Gravitational Waves", Paper 135.03, 219th Am. Astro. Soc. Meeting, Austin, TX, Jan 8-12, 2012. (Abstract: Bulletin of the American Astronomical Soc., Vol. 44, No. 2, 2012.)

J. Papadopoulos, D. Dispoto, B. Cardena, M. Kavic, S. Ellingson, J. Simonetti, S. Cutchin, C. Patterson, "Observational Constraints on Radio Transient Emissions from Binary Neutron Star Mergers", Paper 237.04, 219th Am. Astro. Soc. Meeting, Austin, TX, Jan 8-12, 2012. (Abstract: Bulletin of the American Astronomical Soc., Vol. 44, No. 2, 2012.)

S.W. Ellingson, "Results from LWA1 Commissioning: Sensitivity, Beam Characteristics, & Calibration", URSI National Radio Science Meeting, Boulder, CO, Jan 4, 2012.

S. Ellingson, "How to Observe with LWA1" and "Crab Giant Pulses and Other Short Dispersed Transients", Long Wavelength Array Current & Future Users Meeting, Albuquerque NM, May 12-13, 2011.

G.B. Taylor (UNM), S.E. Tremblay (UNM), Y. Pihlstrom (UNM), J. Craig (UNM), L. Rickard (UNM), J. Dowell (UNM), N. Kassim (NRL), T. Clarke (NRL), B. Hicks (NRL), E. Polisensky (NRL), P. Ray (NRL), H. Schmitt (NRL), D. Woods (NRL), J. Hartman (NRL), S. Ellingson (VT), C. Wolfe (VT), R. Navarro (JPL), E. Sigman (JPL), M. Soriano (JPL), F. Owen (NRAO), "An Update on the Long Wavelength Array", American Astronomical Society 217th Meeting, Seattle WA, Jan 9-13, 2011. (Abstract: Bulletin of the American Astronomical Soc., Vol. 43, No. 2, 2011.)

M. Harun and S. Ellingson, Design and Analysis of Low Frequency Strut Straddling Feed Arrays for EVLA Reflector Antennas, URSI National Radio Science Meeting, Boulder CO, Jan 7, 2011.

S. Ellingson on behalf of the LWA Collaboration, Long Wavelength Array Update, URSI National Radio Science Meeting, Boulder CO, Jan 5, 2011.

S. Ellingson, "LWA-1 Science and Engineering Update", University of New Mexico Astrophysics Seminar, Albuquerque NM, Oct 21, 2010.

R. Navarro (JPL), E. Sigman (JPL), M. Soriano (JPL), D. Wang (JPL), L. D'Addario (JPL), J. Craig (UNM), S. Ellingson (VT), Implementation of a Digital Processing Subsystem for a Long Wavelength Array Station, URSI National Radio Science Meeting, Boulder CO, Jan 7, 2010.

J. Craig (UNM), L. Rickard (UNM), S. Ellingson (VT), G. Taylor (UNM), Y. Pihlstrom (UNM), N. Kassim (NRL), P. Ray (NRL), T. Clarke (NRL), L. D'Addario (NASA/JPL), R. Navarro (NASA/JPL), A. Cohen (NRL), P. Crane (NRL), B. Hicks (NRL), E. Polisensky (NRL), H. Schmitt (NRL), L. Cox (LANL), The Architecture of an LWA Station - A New Phased-Array Radio Telescope (poster, 8 MB), American Astronomical Society 214th Meeting, Pasadena CA, Jun 7-11, 2009. (Abstract: Bulletin of the American Astronomical Soc., Vol. 41, No. 2, 2009.)

N.E. Kassim (NRL), A.S. Cohen (NRL), P.C. Crane (NRL), R. Duffin (NRL), C.A. Gross (NRL), B.C. Hicks (NRL), W.M. Lane (NRL), J. Lazio (NRL), E.J. Polisensky (NRL), P.S. Ray (NRL), K. Stewart (NRL), K.W. Weiler (NRL), T. E. Clarke (NRL), H.R. Schmitt (NRL), J. M. Hartman (NRL), J.F. Helmboldt (NRL), J. Craig (UNM), W. Gerstle (UNM), Y. Pihlstrom (UNM), L.J Rickard (UNM), G.B. Taylor (UNM), S.W. Ellingson (VT), L.R. D'Addario (NASA/JPL), R. Navarro (NASA/JPL), Exploring the Last Electromagnetic Frontier with the Long Wavelength Array (poster, 19 MB), American Astronomical Society 214th Meeting, Pasadena CA, Jun 7-11, 2009. (Abstract: Bulletin of the American Astronomical Soc., Vol. 41, No. 2, 2009.)

J. Lazio (NRL), S. Neff (NASA/GSFC), D. Jones (JPL), J. Burns (Colorado), S. Ellingson (VT), S. Furlanetto (UCLA), J. Kasper (SAO), R. MacDowall (NASA/GSFC), G. Taylor (UNM), H. Thronson (NASA/GSFC), K. Weiler (NRL) J. Weintroub (SAO), J. Ulvestad (NRAO), S. Bale (Berkeley), W. Brisken (NRAO), R. Cappallo (Haystack) L. Demaio (NASA/GSFC), L. Greenhill (SAO), and M. Kaiser (NASA/GSFC), "The Dark Ages Lunar Interferometer", NASA 2009 Lunar Science Forum, NASA Ames Research Center, Moffett Field, CA, July 21-23, 2009.

S. Ellingson, "Station Level Calibration for LWA-1", Long Wavelength Array Long-Lead Review Meeting (LLR), Albuquerque, NM, June 1, 2009.

S.W. Ellingson, "ETA Update" and "ETA Data Processing", Low Frequency Software Workshop, Chicago, August 10, 2008.

S. Ellingson and S.M. Hasan, "Multiband/Multimode Radio," NIJ Commtech Technical Working Group Meeting & Program Review, Boulder, CO, April 2, 2008.

S.W. Ellingson, "Station Architecture and Related Issues", Long Wavelength Array Pre-PDR Meeting, Blacksburg, VA, March 18-19, 2008.

S.W. Ellingson, "Station Digital Processing", Long Wavelength Array Pre-PDR Meeting, Blacksburg, VA, March 18-19, 2008.

S.W. Ellingson, "DAC, MCS, Calibration, RFI, and Communications", Long Wavelength Array Pre-PDR Meeting, Blacksburg, VA, March 18-19, 2008.

S. Ellingson, "Multiband/Multimode Radio," International Wireless Communications Expo (IWCE), Las Vegas, NV, Feb 27, 2008.

J. Lazio, J. Kasper, D. Jones, J. Burns, S. Furlanetto, K. Weiler, R. Mac Dowall, L. DeMaio, S. Bale, S. Ellingson, L. Greenhill, and G. Taylor, "The Dark Ages Lunar Interferometer (DALI)," American Astronomical Society 211th Meeting, Austin, TX, January 2008. (Abstract: Bulletin of the American Astronomical Soc., Vol. 39, No. 4, 2008.)

J. Lazio, S. Neff, D. Jones, J. Burns, S. Ellingson, S. Furlanetto, J. Kasper, R. Mac Dowall, G. Taylor, H. Thronson, K. Weiler, S. Bale, L. DeMaio, L. Greenhill, M. Kaiser, and J. Ulvestad, "The Dark Ages Lunar Interferometer," URSI 2008 National Radio Science Meeting, Boulder, CO, Jan 5, 2008.

S. Ellingson and M. Harun, "Lateral Position Dependence of MIMO Capacity in Hallways at 2.4 GHz," URSI 2008 National Radio Science Meeting, Boulder, CO, Jan 5, 2008.

K. Deshpande, S. Ellingson, J. Simonetti, S. Cutchin, C. Patterson, and B. Martin, "Searching for Low Frequency Radio Transients Using ETA," URSI 2008 National Radio Science Meeting, Boulder, CO, Jan 3, 2008.

S.W. Ellingson, "Acres of Antennas: The Renaissance in VHF-Band Astronomy", Electromagnetics Area Seminar, Virginia Tech Dept. of Electrical & Computer Engineering, Blacksburg, VA, November 1, 2007.

S.W. Ellingson and S.M. Hasan, "Multiband/Multimode Radio", NIJ CommTech PI Meeting, Arlington, VA, October 24, 2007.

S.W. Ellingson, "Status of VT Technical Work", Long Wavelength Array Kickoff and Pre-SRR Meeting, Albuquerque, NM, September 20-21, 2007.

S.W. Ellingson, "Path to SRR/PDR", Long Wavelength Array Kickoff and Pre-SRR Meeting, Albuquerque, NM, September 20-21, 2007.

S.W. Ellingson, "System Architecture Review", Long Wavelength Array Kickoff and Pre-SRR Meeting, Albuquerque, NM, September 20-21, 2007.

S.W. Ellingson, "LWA Technical Concept", Long Wavelength Array Kickoff and Pre-SRR Meeting, Albuquerque, NM, September 20-21, 2007.

S.W. Ellingson, "RFI Mitigation", Frontiers of Astronomy with the World's Largest Radio Telescope (workshop), Washington, DC, September 13, 2007.

S. Ellingson, "Multiband/Multimode Public Safety Radio Project and Related Research", Tyco Electronics Corp., Lynchburg, VA, September 4, 2007.

S. Ellingson, "The Long Wavelength Array", 2007 URSI North American Radio Science Meeting, Ottawa, ON, July 2007.

S. Ellingson and K. Lee, "Interference Mitigation - Where We Stand, Where We Might Go", 2007 URSI North American Radio Science Meeting, Ottawa, ON, July 2007.

P.S. Ray, J. York, A. Kerkhoff, C. Slack, J. Copeland, D. Munton, J.A. Banks, T. Gaussiran, B. Hicks, N. Paravastu, N.E. Kassim, K.W. Weiler, E. Polisensky, P.C. Crane, W. Gerstle, E. Aguilera, Y. Pihlstrom, G.B. Taylor, and S. W. Ellingson, First Light for the Long Wavelength Demonstrator Array, American Astronomical Society Meeting, May 2007. (Abstract: Bulletin of the American Astronomical Soc., Vol. 39, page 277.)

S. Ellingson, "Multiband Radio (Update from Spring 2006)," NIJ CommTech Technical Working Group Meeting / Program Review, San Diego, CA, April 24, 2007.

S. Ellingson, "All-Band All-Mode Radio for Public Safety," International Wireless Communications Expo (IWCE), Las Vegas, NV, March 28, 2007.

S. Ellingson and M. Harun, "MIMO in Hallways" (7.4MB PDF), Intel Corp., Hillsboro OR, March 14, 2007.

S. Ellingson and S.M. Shajedul Hasan, "Virginia Tech's ``All-Band All-Mode Radio for Public Safety'' Project", Motorola Florida Research Labs, Plantation FL, Jan 9, 2007.

S.M. Hasan, P. Balister, K. Lee, J. Reed, and S. Ellingson, "A Low Cost Multi-band/Multi-mode Radio for Public Safety Applications," 2006 Software Defined Radio (SDR) Forum , Vancouver BC, November 2006.

S. Ellingson, "Signal Processing Approaches to RFI Mitigation," National Radio Astronomy Observatory (NRAO) Array Operations Center (AOC), Socorro, NM, September 1, 2006.

S. Ellingson, "Searching for Low Frequency Radio Transients," NRAO Colloquium Series, National Radio Astronomy Observatory (NRAO) Array Operations Center (AOC), Socorro, NM, September 1, 2006. Abstract.

S. Ellingson, "Searching for Low Frequency Radio Transients," Physics and Astronomy Colloquium, University of New Mexico, Albuquerque, NM, August 30, 2006. Abstract.

S. Ellingson, "The Strange Renaissance in Low Frequency Radio Astronomy" (Keynote Address), 2006 Society of Amateur Radio Astronomers Annual Meeting and Conference, Green Bank, WV, June 19, 2006.

S.M. Shajedul Hasan, P. Balister, S.W. Ellingson, J.H. Reed, "A Low Cost All-Band All-Mode Radio for Public Safety Applications" (poster), 2006 Wireless Personal Communications Sym., Jun 2006.

S. Ellingson and J. Reed, "Multi-Band Multi-Mode Radio for Public Safety," International Wireless Communications Expo (IWCE), Las Vegas, NV, May 19, 2006.

S. Ellingson, "Multi-Band Multi-Mode Radio for Public Safety," CommTech Program Review, San Diego, CA, May 3, 2006.

N. Paravastu, B.C. Hicks, R. Bradley, J.R. Fisher, A. Kerkhoff, S. Ellingson, K.P. Stewart, Y.M. Pihlstrom, W.C. Erickson, N.E. Kassim, P.S. Ray, K.W. Weiler, Characterizing Active Antennas for the Long Wavelength Array, American Astronomical Society 207th Meeting, Washington, DC, January 2006. (Abstract: Bulletin of the American Astronomical Soc., Vol. 37, No. 4, page 1388.)

P.S. Ray, T.J.W. Lazio, S. Ellingson, S. Close, P. Crane, S.D. Hyman, B.A. Jacoby, W. Junor, N.E. Kassim, S.R. Kulkarni, Y.M. Pihlstrom, G.B. Taylor, and D. Werthimer, The Long Wavelength Array and the Radio Transient Sky, American Astronomical Society 207th Meeting, Washington, DC, January 2006. (Abstract: Bulletin of the American Astronomical Soc., Vol. 37, No. 4, page 1389.)

J. H. Simonetti, S. W. Ellingson, C. D. Patterson, W. Taylor, V. Venugopal, S. Cutchin, and Z. Boor, The Eight-meter-wavelength Transient Array (ETA), American Astronomical Society 207th Meeting, Washington, DC, January 2006. (Abstract: Bulletin of the American Astronomical Soc., Vol. 37, No. 4, page 1438.)

S.W. Ellingson, The Eight-meter-wavelength Transient Array (PDF), Grote Reber Memorial Conf. on New Techniques and Results in Low-Frequency Radio Astronomy, Hobart, Tasmania, Australia, December 7, 2005

S.W. Ellingson, "The Eight-meter-wavelength Transient Array", VT Freshman Engineering Seminar, Blacksburg, VA, USA, Sep 30, 2005

J.T. Johnson, S.W. Ellingson, "A Polarimetric Survey of RFI in C- and X-Bands in the Continental United States Using WindSAT Radiometry", 2005 IEEE Int'l Ant. and Prop. Symp. (URSI Session), Washington, DC, July 2005.

J.T. Johnson, N. Niamsuwan, and S.W. Ellingson, "Digital Receiver For Interference Suppression in Microwave Radiometry," 2005 NASA Earth-Sun Technology Conf., Adelphi, MD, Jun 2005.

S.W. Ellingson, "The MIMO Propagation Channel," The Ohio State University Dept. of Electric Engineering Colloquium, December 22, 2004.

S.W. Ellingson, "Understanding the MIMO Propagation Channel," Virginia Tech College of Engineering Undergraduate Research Seminar, December 3, 2004.

S.W. Ellingson and J.T. Johnson, "A Study of RFI in the WindSat C- and X-Band Channels," WindSat Cal/Val and Science Meeting, Solomons, MD, November 17-18 2004.

S.W. Ellingson, R. Mostafa, J. H. Reed, "MIMO Development Efforts at Virginia Tech" (PDF), 2004 IEEE Radio & Wireless Conference, Atlanta, GA, 2004.

S.W. Ellingson "Designing a Sky-Noise-Limited Receiver for LWA", Santa Fe, NM, September 2004. Paper based on presentation: S.W. Ellingson (2005), "Receivers for Low-Frequency Radio Astronomy", From Clark Lake to the Long Wavelength Array: Bill Erickson's Radio Science, (N.E. Kassim et al., eds.). ASP Conference Series. Volume 345. ISBN 1-58381-213-X2005. pp. 321-36.

S.W. Ellingson and W. van Driel, "Report on RFI2004," Int'l Square Kilometer Array Meeting, Penticton, BC, July 2004.

S. Ellingson and P. McDougle, "Iridium: Characterization and Countermeasures," Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy (RFI2004), Penticton, BC, 2004.

N. Niamsuwan, J. T. Johnson, and S. W. Ellingson, "Examination of a simple pulse blanking technique for RFI mitigation," Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy (RFI2004), Penticton, BC, 2004.

S.W. Ellingson, "Wide Field Searches for Radio Transients", U. of Minnesota Astrophysics Colloquium, Apr 30, 2004.

S.W. Ellingson, R. Ferris, and H. Hinterigger, "Station Processing for a Low Frequency Array in WA: Receivers & Beamforming", Int'l Radio Quiet Array Meeting, Kahuku, HI, Mar 2004.

S.W. Ellingson, "Interference Mitigation in Radio Astronomy and Remote Sensing", Virginia Tech ECE Dept. Graduate Seminar, Feb 2004.

S.W. Ellingson, G.A. Hampson, and J.T. Johnson, ``Design of an L-Band Microwave Radiometer with Active Mitigation of Interference'' (PDF), Earth Science Technology Conference 2003, Adelphi MD, June 2003.

S.W. Ellingson and G.A. Hampson, "Characterization & Mitigation of L-Band Ground-Based Aviation Radars", 2003 URSI National Radio Science Meeting, Columbus, OH, June 2003.

G.A. Hampson and S.W. Ellingson, "Design of an L-Band Microwave Radiometer with Active Mitigation of Interference ", 2003 URSI National Radio Science Meeting, Columbus, OH, June 2003.

G.R. Harp and S.W. Ellingson, "Wideband Nulling with a Single-Tap Beamformer", 2003 URSI National Radio Science Meeting, Columbus, OH, June 2003.

G. Hampson and S. Ellingson, "Modular Digital Backends for Microwave Radiometry" (PDF), ALFA Consortium Meeting, NAIC/Arecibo Observatory, November 1, 2002.

S. Ellingson, "Antenna Arrays, Capacity, and Coherence at 2.4 GHz" (PDF presentation), April 2002.

S.W. Ellingson, "Efficient Multibeam Synthesis with Interference Nulling for Large Arrays", URSI National Radio Science Meeting, Boulder, CO, January 2002.

S.W. Ellingson and G.A. Hampson, VHF-Band RFI Measurements and Mitigation, LOFAR Workshop, MIT Haystack Observatory, October 2001.

S.W. Ellingson, "RFI Detection Using an Array," 2000 International SKA Meeting, Berkeley, CA, July 2001.

S. Ellingson and J. Hetrick, "An 8-Element Dual-Frequency Array Receiver for Propagation Measurements Near 2.4 GHz", Electromagnetic Range Consortium Meeting, Columbus, OH, July 31, 2001.

S.W. Ellingson, "Limitations of Interference Beam Subtraction for Very Large Wideband Arrays", RFI Mitigation Workshop, Max Plank Institute for Radio Astronomy (MPIfR), Bonn, Germany, March 2001.

S.W. Ellingson, "Removal of the GLONASS C/A Signal from OH Spectral Line Observations using a Parametric Modeling Technique", RFI Mitigation Workshop, Max Plank Institute for Radio Astronomy (MPIfR), Bonn, Germany, March 2001. (NOTE: Superceded by ApJS paper; see above.)

S.W. Ellingson, "Smart Antenna Technologies", 2001 IEEE Workshop on New & Emerging Technologies, Rutgers University, January 18, 2001.

S.W. Ellingson, J. Bunton, and J.F. Bell, "Cancellation of the GLONASS Coarse/Acquisition Code by Parametric Modelling", Technological Pathways to the Square Kilometer Array, Jodrell Bank (UK), August 2000. (Note: Superceded by ApJS paper; see above.)

S.W. Ellingson, J. Bunton, and J.F. Bell, "Suppression of GLONASS Signals Using Parametric Signal Modelling", Workshop on Applications of Radio Science 2000, La Trobe University (Australia), 2000. (Note: Superceded by ApJS paper; see above.)

S.W. Ellingson, J. Bunton, and J.F. Bell, "Cancellation of GLONASS Signals from Radio Astronomy Data", Astronomical Telescopes and Instrumentation 2000 - Radio Telescopes, SPIE Conference 4015, Munich, March 2000, pp. 400-407. (Note: Superceded by ApJS paper; see above.)

S.W. Ellingson, "Joint Multibeaming and RFI Suppression for SKA-Class Systems", US SKA Consortium Meeting at Arecibo, Puerto Rico, February 2000.

S.W. Ellingson,  "A Parametric Approach to RFI Suppression", URSI National Radio Science Meeting, Boulder, CO, January 2000.

S.W. Ellingson, (Multiple Talks), E&F White Conference on RFI Mitigation Strategies at CSIRO/ATNF, Sydney, Australia, December 1999. Presentations made:

• Inteference Mitigation Techniques
• A Subspace Tracking Approach to Nullforming for Large Arrays
• A Physical Perspective of Array Signal Processing
• A Variation on the Ekers-Sault Focal Plane / Post Correlation Idea

S.W. Ellingson, "RFI Suppression for Radio Astronomy: Frequency-, Time-, Space-, and Multidomain Approaches", (JCEF introduction talk) XXVI General Assembly of the Int'l URSI, Toronto, ON, August 1999.

S.W. Ellingson, "A DSP Engine for a 64-Element Array", Technologies for Large Antenna Arrays, Dwingeloo, The Netherlands, April 1999.

S.W. Ellingson and R.S. Dixon, "RFI Direction Finding and Suppression Using an Adaptive Array: Field Results", URSI National Science Meeting, Boulder, CO, January 1999.

S.W. Ellingson, "Array Receiver Development", Int'l Square Kilometer Array Science Meeting, Calgary, Alberta, July 1999.

J.P. Kennedy and S.W. Ellingson, "Smart Antenna Testbed for Mobile Wireless Systems", Proceedings of Virginia Tech's Sixth Symposium on Wireless Communications, Blacksburg, VA, June 1996. Reprinted in Wireless Personal Communications: Advances in Coverage and Capacity, J.H. Reed, B.D. Woerner and T.S. Rappaport (eds.), Kluwer, 1997.

S.W. Ellingson and J.P. Kennedy, "Design and Testing of an Adaptive Array for Mobile Wireless Systems", Proc. AMTA 1995 Symposium, Williamsburg, VA, November 1995.

S.W. Ellingson, I.J. Gupta, and S.W. Ellingson, "Analysis of Blended Rolled Edge Reflectors using Numerical UTD", Proc. AMTA 1989 Symposium, Monterey, CA, October 1989.

R.S. Dixon, S.W. Ellingson, and R.J. Koch, "A Radio Frequency Interference Survey of Central Ohio", Proc. International Astronomical Union Colloquium No. 112, Washington DC, August 1988.

ESL Technical Reports

S.W. Ellingson, Characterization of Some L-Band Signals Visible at Arecibo, The Ohio State University ElectroScience Laboratory Technical Report 743467-2, Feb 2003.

S.W. Ellingson and G.A. Hampson, Argus Telescope Development in 2002, The Ohio State University ElectroScience Laboratory Technical Report 531393-4, Jan 2003. Note: This is a compendium of reports available in PDF form here.

S.W. Ellingson, A Study of Adaptive Canceling for Microwave Radiometry and Spectrometry (PDF), The Ohio State University ElectroScience Laboratory Technical Report 743467-1, Sep 2002. (Previously available as an informal report, December, 2001; revised January 6, 2002; revised September 16, 2002.)

I.J. Gupta, S.W. Ellingson, and T.D. Moore, Performance Analysis of STAP/SFAP Using MIT Lincoln Laboratory Measured Data, The Ohio State University ElectroScience Laboratory Technical Report 741718-1, June 2002.

S.W. Ellingson, Performance of Various Base Station Antenna Arrays for Mobile Wireless Communications, The Ohio State University ElectroScience Laboratory Technical Report 740337-3, November 2001.

S.W. Ellingson and J. Hetrick, Design of an 8-Element Dual-Frequency Array Receiver for Propagation Measurements at 2.4 GHz, The Ohio State University ElectroScience Laboratory Technical Report 740337-1, July 2001. (Note: This supercedes Technical Report 738600-6.)

I.J. Gupta, S.W. Ellingson, J.M. Hetrick, J.R. Baxter, and S.A. Rice, Final Report on Second Year Collaborative Research Effort on Smart Antenna Array Processing, The Ohio State University ElectroScience Laboratory Technical Report 738600-7, July 2001.

S.W. Ellingson and D. Lyons, Open Loop Forward Link Beamforming with Diversity Switching, The Ohio State University ElectroScience Laboratory Technical Report 738600-8, May 2001.

S.W. Ellingson and J. Hetrick, Design of an 8-Element Dual-Frequency Array Receiver for Propagation Measurements at 2.4 GHz, The Ohio State University ElectroScience Laboratory Technical Report 738600-6, Apr. 2001. (NOTE: This is superceded by Technical Report 740337-1.)

S.W. Ellingson, Estimating Spatial Statistics for Use in DS-CDMA Forward Link Beamforming, The Ohio State University ElectroScience Laboratory Technical Report 738600-5, Apr. 2001.

S.W. Ellingson, Methods for Transceiver Calibration, The Ohio State University ElectroScience Laboratory Technical Report 738600-4, Apr. 2001.

I.J. Gupta, J.R. Baxter, S.W. Ellingson, and H.G. Park, An Experimental Study of Antenna Array Calibration, The Ohio State University ElectroScience Laboratory Technical Report 738600-3, Mar. 2001.

I.J. Gupta, J.D. Young, and S.W. Ellingson, "Design, Fabrication, and Calibration of Two Six-Element Antenna Arrays for TDOA Receivers", The Ohio State University ElectroScience Laboratory Technical Report 739225-3, Feb. 2001.

I.J. Gupta and S.W. Ellingson, "Multipath Parameter Estimation in TDOA Receivers", The Ohio State University ElectroScience Laboratory Technical Report 739225-2, Dec. 2000.

I.J. Gupta, S.W. Ellingson, and J.D. Young, "Interim Report on Multipath Parameter Estimation for TDOA Receivers", The Ohio State University ElectroScience Laboratory Technical Report 739225-1, Sep. 2000.

S.W. Ellingson, I. J. Gupta, D. Lyons, and H. Kiper, "Forward Link Array Processing and AOA Estimation for 3G Wideband CDMA Mobile Systems", The Ohio State University ElectroScience Laboratory Technical Report 738600-2, July 2000.

S.W. Ellingson, I. J. Gupta, D. Lyons, and H. Kiper, "Smart Antenna Array Processing for 3G Wideband CDMA Mobile Systems",  The Ohio State University ElectroScience Laboratory Technical Report 738600-1, April 2000.

S.W. Ellingson, "Radio Source Localization Using a Small Array", The Ohio State University ElectroScience Laboratory Technical Report 531393-3, March 2000.

D. Schuchmann and S. Ellingson, "Intelligent Data Buffer for Software Radio Applications", The Ohio State University ElectroScience Laboratory Technical Report 222114-1, June 1999.

E. Ranu and S. Ellingson, "A Software-Programmable Wideband Signal Generator", The Ohio State University ElectroScience Laboratory Technical Report 736390-1, May 1999.

S.W. Ellingson, "A Software-Defined Digital Signal Processing Architecture for Large Antenna Arrays", The Ohio State University ElectroScience Laboratory Technical Report 531393-2, March 1999.

S.W. Ellingson and R.S. Dixon, "The OSU Omnidirectional Radio Telescope Project", The Ohio State University ElectroScience Laboratory Technical Report 531393-1, January 1999.

I.J. Gupta, S.W. Ellingson, and T.D. Moore, "A Study of Spatial/Signal Processing for Interference Suppression in a GPS Receiver", The Ohio State University ElectroScience Laboratory Technical Report 735626-1, December 1998.

I.J. Gupta, S.W. Ellingson, and M.P. Fitz, "Multipath Mitigation in a Time Difference of Arrival (TDOA) Receiver", The Ohio State University ElectroScience Laboratory Technical Report 734669-1, February 1998.

S.W. Ellingson and M.P. Fitz, "The OSU Mark I Software Radio System", The Ohio State University ElectroScience Laboratory Technical Report 210078-1, September 1997.

I.J. Gupta, S.W. Ellingson and R.T. Compton, "Final Technical Report on Interference Suppression Techniques for GPS Receivers", Technical Report 733255-3, The Ohio State University ElectroScience Laboratory, July 1997.

I.J. Gupta, S.W. Ellingson, R.G. Rojas, R.T. Compton and R.J. Mayhan, "Study of Interference Suppression Techniques for GPS Receivers", The Ohio State University ElectroScience Laboratory Technical Report 733255-2, May 1997.

S.W. Ellingson and I.J. Gupta, "User's Manual for Numerical UTD Code for Blended Rolled Edge Compact Range Reflectors", The Ohio State University ElectroScience Laboratory Technical Report 721929-6, August 1989.

S.W. Ellingson, I.J. Gupta, and W.D. Burnside, "Analysis of Blended Rolled Edge Reflectors Using Numerical UTD", The Ohio State University ElectroScience Laboratory Technical Report 721929-2, June 1989.

S.W. Ellingson, "Curvature of Blended Rolled Edge Reflectors at the Shadow Boundary Contour", The Ohio State University ElectroScience Laboratory Technical Report 716148-29, April 1988.

Other Pubs

S. Ellingson, D. Mertley, S. Coffey and R. Subrahmanyan, Strut-Straddling Arrays for the VLA 4-meter Observing System, EVLA Memo 173, Sep 22, 2013.

S. Ellingson, S. Coffey and D. Mertley, The Modified J-Pole Antenna, EVLA Memo 172, Sep 20, 2013.

For DALI: J. Lazio, S. Neff, D. Jones, J. Burns, S. Ellingson, S. Furlanetto, J. Kasper, R. MacDowall, G. Maki, K. Stewart, G. Taylor, H. Thronson, K. Weiler, J. Weintroub, P.-S. Yeh, S. Bale, W. Brisken, R. Capello, L. Demaio, L. Greenhill, M. Kaiser; For LARC: J. Hewitt, A. deOliveira Costa, R. Foster, P. Ford, R. Goeke, J. Hoffman, J. Miller, M. Tagmark, J. Villasenor, M. Zuber, A. Loeb, M. Zaldarriaga, M. Morales, D. Backer, J. Bowman, J. Booth, C. Lawrence, G. Lee, R. Lee, M. Werner, B. Wilson, R. Bradley, C. Carilli, "The Lunar Radio Array" (9 MB), Final Report to NASA Astrophysics Stategic Mission Concept Studies program, April 24, 2009.

J. Ott, W. Brisken, C. Carilli, S. Durand, S. Ellingson, D. Frail, B. Hayward, J. Jackson, N. Kassim, C. Kutz, M. McKinnon, F. Owen, R. Perley, and the EVLA Team, "Pushing the Limits of the EVLA: An Enhancement Program for the Next Decade", Astro2010 Activity White Paper, April 1, 2009.

For DALI: J. Lazio, S. Neff, D. Jones, J. Burns, S. Ellingson, S. Furlanetto, J. Kasper, R. MacDowall, G. Maki, K. Stewart, G. Taylor, H. Thronson, K. Weiler, J. Weintroub, P.-S. Yeh, S. Bale, W. Brisken, R. Capello, L. Demaio, L. Greenhill, M. Kaiser; For LARC: J. Hewitt, A. deOliveira Costa, R. Foster, P. Ford, R. Goeke, J. Hoffman, J. Miller, M. Tagmark, J. Villasenor, M. Zuber, A. Loeb, M. Zaldarriaga, M. Morales, D. Backer, J. Bowman, J. Booth, C. Lawrence, G. Lee, R. Lee, M. Werner, B. Wilson, R. Bradley, C. Carilli, "The Lunar Radio Array", Astro2010 Activity White Paper, April 1, 2009.

J. Lazio, S. Neff, J. Hewitt, J. Burns, R. Bradley, C.L. Carilli, S. Ellingson, S. Furlanetto, P. Ford, R. Goeke, D. Jones, C. Lawrence, G. Lee, A. Loeb, R. MacDowall, G. Maki, G.B. Taylor, H. Thronson, J. Villasenor, K. Weiler, "Technology Development for the Lunar Radio Array", Astro2010 Technology Development White Paper, March 31, 2009.

International Telecommunications Union, "Techniques for mitigation of radio frequency interference in radio astronomy," ITU-R Report RA.2126, 2007. Authors: S.W. Ellingson and B.M. Lewis.

M. Kavic, J.H. Simonetti, S.E. Cutchin, S.W. Ellingson, C.D. Patterson, "Transient Pulses from Exploding Primordial Black Holes as a Signature of an Extra Dimension," Internal Report VPI-IPNAS-08-04, Jan 25, 2008. Preprint released as astro-ph/0801.4023 (http://arxiv.org/abs/0801.4023).

S.W. Ellingson and S.M. Shajedul Hasan, "What's in Radio's Future? All-band all-mode radio could solve interoperability challenges," MissionCritical Communications, March 2007, pp. 50-60. Note: The published version was heavily edited, including changing the title and (unforgivable!) removing the references! Here is a complete version including the references: The Rise of All-Band All-Mode Radio.

S.W. Ellingson, G.A. Hampson, and J.T. Johnson, "Digital Receiver for Microwave Radiometry", NASA Tech Briefs, Vol. 29, No. 2, Feb 2005, pg. 36-7.

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