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Unnikrishna Pillai

Full Professor Electrical Engineering

    1974 …2019
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    Research Output 1974 2019

    2019

    Minimum detectable velocity (MDV) for ATI and STAP for high speed platforms

    Li, K. Y., Pillai, U. & Mudaliar, S., Apr 2019, 2019 IEEE Radar Conference, RadarConf 2019. Institute of Electrical and Electronics Engineers Inc., 8835591. (2019 IEEE Radar Conference, RadarConf 2019).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    space-time adaptive processing
    Space time adaptive processing
    platforms
    high speed
    false alarms
    2018

    A comparison of receiver concepts for doubly-dispersive random channels

    Sgraja, C., Lindner, J. & Pillai, U., Mar 14 2018, 2004 International Waveform Diversity and Design Conference, WDD 2004 - Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January. p. 1-3 3 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Adaptive filters
    Sampling
    Error analysis
    Signal to noise ratio

    Energy threshold constraints in transmit waveform design

    Pillai, U., Li, K. Y. & Himed, B., Mar 21 2018, 2006 International Waveform Diversity and Design Conference, WDD 2006 - Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January. p. 1-5 5 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transmitters
    waveforms
    thresholds
    clutter
    receivers

    Waveform diversity for space based radar

    Pillai, U., Himed, B. & Li, K. Y., Mar 14 2018, 2004 International Waveform Diversity and Design Conference, WDD 2004 - Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January. p. 1-5 5 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Target tracking
    Bins
    Radar
    Earth (planet)
    Degradation
    2016

    Exploiting temporal proximity for moving target identification using bistatic/passive SAR

    Li, K. Y., Pillai, U. & Himed, B., Jun 3 2016, 2016 IEEE Radar Conference, RadarConf 2016. Institute of Electrical and Electronics Engineers Inc., 7485224

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Frequency modulation
    Orthogonal frequency division multiplexing
    proximity
    Imaging techniques
    Synthetic aperture radar

    Statistical performance analysis for GMTI using ATI phase distribution

    Pillai, U., Li, K. Y., Majumder, U., Minardi, M. J. & Sobota, D., 2016, Algorithms for Synthetic Aperture Radar Imagery XXIII. SPIE, Vol. 9843. 984307

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Interferometry
    Synthetic aperture radar
    Performance Analysis
    Statistical Analysis
    Synthetic Aperture
    2015

    Geolocation of moving targets in Gotcha data using multimode processing

    Pillai, U., Li, K. Y. & Scarborough, S. M., 2015, Algorithms for Synthetic Aperture Radar Imagery XXII. SPIE, Vol. 9475. 947508

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Moving Target
    Interferometry
    Signal processing
    Imaging techniques
    SAR Image

    Moving target geolocation in bistatic/passive SAR images using ATI

    Li, K. Y., Pillai, U. & Himed, B., Jun 22 2015, IEEE National Radar Conference - Proceedings. June ed. Institute of Electrical and Electronics Engineers Inc., Vol. 2015-June. p. 45-50 6 p. 7130968

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Orthogonal frequency division multiplexing
    Transmitters
    Radar

    Target geolocation in Gotcha data using panoramic processing

    Pillai, U., Li, K. Y. & Scarborough, S., Jun 22 2015, IEEE National Radar Conference - Proceedings. June ed. Institute of Electrical and Electronics Engineers Inc., Vol. 2015-June. p. 21-26 6 p. 7130964

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Signal processing
    Processing
    Interferometry
    Imaging techniques
    2014

    Distribution of multi-look SAR and ATI using two phase centers

    Pillai, U. & Davis, M. E., 2014, 2014 IEEE Radar Conference: From Sensing to Information, RadarCon 2014. Institute of Electrical and Electronics Engineers Inc., p. 22-26 5 p. 6875548

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Interferometry
    Testing

    Dynamic clutter mitigation using sparse optimization

    Uysal, F., Selesnick, I., Pillai, U. & Himed, B., 2014, In : IEEE Aerospace and Electronic Systems Magazine. 29, 7, p. 37-49 13 p., 6888958.

    Research output: Contribution to journalArticle

    wind power
    clutter
    Wind power
    wind farm
    mitigation

    Signal decomposition for wind turbine clutter mitigation

    Uysal, F., Pillai, U., Selesnick, I. & Himed, B., 2014, 2014 IEEE Radar Conference: From Sensing to Information, RadarCon 2014. Institute of Electrical and Electronics Engineers Inc., p. 60-63 4 p. 6875555

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Wind turbines
    Radar
    Decomposition
    Radar systems

    Waveform diversity for ultra-wide band surveillance radars

    Davis, M. E. & Pillai, U., Dec 1 2014, In : IET Radar, Sonar and Navigation. 8, 9, p. 1226-1233 8 p.

    Research output: Contribution to journalArticle

    Cellular telephone systems
    Radar systems
    Frequency bands
    Radar
    Earth (planet)
    2013

    Joint Along Track Interferometry and Space-Time Adaptive Processing for target detection and geolocation

    Uysal, F., Murthy, V., Li, K. Y., Pillai, U. & Davis, M. E., 2013, IEEE Radar Conference 2013: "The Arctic - The New Frontier", RadarCon 2013. 6585968

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Space time adaptive processing
    Target tracking
    Interferometry
    Synthetic aperture radar
    Radar
    2012

    401(k) and the curse of volatility

    Pillai, U. & Murthy, V., 2012, New York: Amazon Digital Services.

    Research output: Book/ReportBook

    Doppler-streak attenuation via oscillatory-plus-transient decomposition of IQ data

    Selesnick, I., Li, K. Y., Pillai, U. & Himed, B., 2012, IET International Conference on Radar Systems, Radar 2012. 603 CP ed. Vol. 2012. 1638

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Decomposition
    Bins
    Processing

    Engineering probability

    Pillai, U. & Chen, X., 2012, New York: Amazon Digital Services.

    Research output: Book/ReportBook

    Missing data recovery using low rank matrix completion methods

    Pillai, U., Murthy, V. & Selesnick, I., 2012, 2012 IEEE Radar Conference: Ubiquitous Radar, RADARCON 2012 - Conference Program. p. 101-106 6 p. 6212119

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Bandwidth
    Recovery

    Modified space-time adaptive processing for dismount detection using synthetic aperture radar

    Li, K. Y., Uysal, F., Pillai, U. & Moore, L. J., 2012, 2012 IEEE Radar Conference: Ubiquitous Radar, RADARCON 2012 - Conference Program. p. 116-121 6 p. 6212122

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Space time adaptive processing
    Synthetic aperture radar
    Scattering
    Sensors
    Radar signal processing

    Sparsity-based methods for interrupted radar data reconstruction

    Storm, K., Murthy, V., Selesnick, I. & Pillai, U., 2012, 2012 IEEE Radar Conference: Ubiquitous Radar, RADARCON 2012 - Conference Program. p. 107-111 5 p. 6212120

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Radar
    Synthetic aperture radar
    Image processing
    History
    Imaging techniques

    Waveforms for simultaneous SAR and GMTI

    Murthy, V., Pillai, U. & Davis, M. E., 2012, 2012 IEEE Radar Conference: Ubiquitous Radar, RADARCON 2012 - Conference Program. p. 51-56 6 p. 6212110

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Synthetic aperture radar
    Radar imaging
    Image processing
    Degradation
    2011

    Chirp-like transmit waveforms with multiple frequency-notches

    Selesnick, I. & Pillai, U., 2011, RadarCon'11 - In the Eye of the Storm: 2011 IEEE Radar Conference. p. 1106-1110 5 p. 5960706

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Radar systems
    Frequency bands
    Computational complexity
    Navigation
    Communication

    Constant envelope signals with prescribed discrete Fourier transform magnitude

    Pillai, S. U., Li, K. Y. & Himed, B., 2011, RadarCon'11 - In the Eye of the Storm: 2011 IEEE Radar Conference. p. 470-473 4 p. 5960582

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Pulse compression
    Discrete Fourier transforms

    Waveform diversity: Theory & applications

    Pillai, U., Li, K. Y., Selesnick, I. & Himed, B., 2011, New York: McGraw-Hill. 306 p.

    Research output: Book/ReportBook

    2010

    Adaptive transmitter weight design for clutter suppression

    Pillai, U., Li, K. Y. & Himed, B., 2010, 2010 2nd International Workshop on Cognitive Information Processing, CIP2010. p. 360-363 4 p. 5604206

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Interference suppression
    Transmitters

    Angle-Doppler processing using sparse regularization

    Selesnick, I., Pillai, U., Li, K. Y. & Himed, B., 2010, 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Proceedings. p. 2750-2753 4 p. 5496219

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Aircraft radar equipment
    Space time adaptive processing
    Inverse problems
    Processing

    An iterative algorithm for the construction of notched chirp signals

    Selesnick, I., Pillai, U. & Zheng, R., 2010, 2010 IEEE Radar Conference: Global Innovation in Radar, RADAR 2010 - Proceedings. p. 200-203 4 p. 5494625

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Pulse compression
    Radar systems
    Navigation systems
    Frequency bands
    Communication systems

    Design of unimodular sequences using generalized receivers

    Pillai, S. U., Li, K. Y., Zheng, R. & Himed, B., 2010, 2010 IEEE Radar Conference: Global Innovation in Radar, RADAR 2010 - Proceedings. p. 729-734 6 p. 5494526

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Matched filters
    Delta functions
    Substitution reactions
    2009

    Reconstruction of constant envelope signals with given Fourier transform magnitude

    Pillai, S. U., Ke, Y. L. & Beyer, H., 2009, 2009 IEEE Radar Conference, RADAR 2009. 4976933

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Signal reconstruction
    Fourier transforms
    2008

    Cramer-Rao bounds for target parameters in space-based radar applications

    Pillai, U., Li, K. Y. & Himed, B., 2008, In : IEEE Transactions on Aerospace and Electronic Systems. 44, 4, p. 1356-1370 15 p.

    Research output: Contribution to journalArticle

    Cramer-Rao bounds
    Earth (planet)
    Target tracking
    Degradation
    Space-based radar

    Effect of wind on space-based radar performance

    Pillai, U., Li, K. Y. & Himed, B., 2008, 2008 IEEE Radar Conference, RADAR 2008. 4721102

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Target tracking
    Autocorrelation
    Probability density function
    Lakes
    Space-based radar

    Efficient wideband processing without subbanding

    Pillai, U., Li, K. Y. & Guerci, J. R., 2008, 2008 IEEE Radar Conference, RADAR 2008. 4720938

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Target tracking
    Processing
    Space time adaptive processing
    Bessel functions

    Space based radar: Theory and applications

    Pillai, U., Li, K. Y. & Himed, B., 2008, New York: McGraw-Hill.

    Research output: Book/ReportBook

    Theory and application of optimum and adaptive MIMO radar

    Guerci, J. R., Wicks, M. C., Bergin, J. S., Techau, P. M. & Pillai, U., 2008, 2008 IEEE Radar Conference, RADAR 2008. 4721122

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    MIMO radar
    Radar
    Matched filters
    MIMO systems

    Waveform design optimization using bandwidth and energy considerations

    Pillai, U., Li, K. Y. & Beyer, H., 2008, 2008 IEEE Radar Conference, RADAR 2008. 4721069

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transmitters
    Bandwidth
    Design optimization
    2007

    A modulation based approach to wideband-STAP

    Li, K. Y., Pillai, U., Zulch, P. & Callahan, M., 2007, Conference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC. p. 1825-1829 5 p. 4487550

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Space time adaptive processing
    Modulation
    Processing
    Radar

    Clutter impacts on space based radar GMTI: A global perspective

    Li, K. Y., Mangiat, S., Zulch, P. & Pillai, U., 2007, 2007 IEEE Aerospace Conference Digest. 4161481

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Earth (planet)
    Launching
    Radar
    Space-based radar

    Effect of bandwidth on wideband-stap performance

    Pillai, U., Li, K. Y. & Guerci, J. R., 2007, Conference Record of the 41st Asilomar Conference on Signals, Systems and Computers, ACSSC. p. 2195-2198 4 p. 4487630

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Bandwidth
    Processing
    Antennas
    2006

    Cramer-Rao bounds for target doppler and power in space based radar

    Pillai, U., Li, K. Y. & Himed, B., 2006, 2006 IEEE Radar Conference. p. 452-458 7 p. 1631839

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Cramer-Rao bounds
    White noise
    Target tracking
    Earth (planet)
    Space-based radar

    Cramer-Rao bounds for target Doppler and power in space based radar

    Pillai, U., Li, K. Y. & Himed, B., 2006, 2006 IEEE Radar Conference. Vol. 2006. p. 452-458 7 p. 1631839

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Cramer-Rao bounds
    White noise
    Target tracking
    Earth (planet)
    Space-based radar

    Effect of earth's rotation and range foldover on space-based radar performance

    Pillai, U., Himed, B. & Li, K. Y., 2006, In : IEEE Transactions on Aerospace and Electronic Systems. 42, 3, p. 917-931 15 p.

    Research output: Contribution to journalArticle

    Earth (planet)
    Orbits
    Space-based radar
    Geometry
    Processing

    Effect of terrain modeling and internal clutter motion on space based radar performance

    Mangiat, S., Li, K. Y., Pillai, U. & Himed, B., 2006, 2006 IEEE Radar Conference. p. 310-317 8 p. 1631817

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Radar cross section
    Target tracking
    Lakes
    NASA
    Earth (planet)

    Remote sensing using space based radar

    Himed, B., Li, K. Y. & Pillai, U., 2006, Advances in Sensing with Security Applications. p. 189-213 25 p. (NATO Security through Science Series A: Chemistry and Biology).

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Radar
    Remote sensing
    Earth (planet)
    Radar systems
    Target tracking

    Spectral estimation and modeling: Spectral analysis

    Pillai, U. & Shim, T. I., Jan 1 2006, Circuits, Signals, and Speech and Image Processing. CRC Press, p. 17-1-17-8

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Spectrum analysis
    Color
    Wavelength
    Prisms
    Experiments
    2005

    Effect of Earth's rotation and range foldover on space based radar performance

    Pillai, U., Himed, B. & Li, K. Y., 2005, IEEE National Radar Conference - Proceedings. January ed. Institute of Electrical and Electronics Engineers Inc., Vol. 2005-January. p. 137-142 6 p. 1435808

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Earth (planet)
    Orbits
    Space-based radar
    Geometry
    Processing

    Geometrical Considerations for Terrain Mapping in SBR Applications

    Li, K. Y., Mangiat, S., Pillai, U. & Himed, B., May 2005, 2005 IEEE International Radar Conference, Arlington , VA.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Orthogonal pulsing schemes for improved target detection in space based radar

    Pillai, U., Himed, B. & Li, K. Y., 2005, Proceedings - 2005 IEEE Aerospace Conference. Vol. 2005. 1559510

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Target tracking
    Bins
    Radar
    Earth (planet)
    Degradation

    The Perron-Frobenius theorem

    Pillai, U., Suel, T. & Cha, S., 2005, In : IEEE Signal Processing Magazine. 22, 2, p. 62-75 14 p.

    Research output: Contribution to journalArticle

    Perron-Frobenius Theorem
    Population Growth
    Eigenvalues and Eigenvectors
    Web Search
    Power Control
    2004

    Efficient tapering methods for STAP

    Pillai, U., Guerci, J. R. & Pillai, S. R., 2004, Proceedings of the IEEE Radar Conference. p. 408-413 6 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Space time adaptive processing
    Covariance matrix
    Adaptive algorithms
    Target tracking
    Processing

    Modeling of earth's rotation for space based radar

    Pillai, U., Himed, B. & Li, K. Y., 2004, Conference Record - Asilomar Conference on Signals, Systems and Computers. Matthews, M. B. (ed.). Vol. 2. p. 1682-1686 5 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Earth (planet)
    Orbits
    Geometry
    Space-based radar