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Unnikrishna Pillai

Full Professor Electrical Engineering

    1974 …2019
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    Research Output 1974 2019

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    2014

    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

    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)
    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
    2006

    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
    2005

    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
    2002

    Full-polarization matched-illumination for target detection and identification

    Garren, D. A., Odom, A. C., Osborn, M. K., Goldstein, J. S., Pillai, U. & Guerci, J. R., Jul 2002, In : IEEE Transactions on Aerospace and Electronic Systems. 38, 3, p. 824-837 14 p.

    Research output: Contribution to journalArticle

    Target tracking
    Lighting
    Polarization
    Frequency response
    Radar
    2001

    Enhanced target detection and identification via optimised radar transmission pulse shape

    Garren, D. A., Osborn, M. K., Odom, A. C., Goldstein, J. S., Pillai, U. & Guerci, J. R., Jun 2001, In : IEE Proceedings: Radar, Sonar and Navigation. 148, 3, p. 130-138 9 p.

    Research output: Contribution to journalArticle

    Target tracking
    Radar
    Lighting
    2000

    Generalized forward/backward subaperture smoothing techniques for sample starved STAP

    Pillai, U., Kim, Y. L. & Guerci, J. R., Dec 2000, In : IEEE Transactions on Signal Processing. 48, 12, p. 3569-3574 6 p.

    Research output: Contribution to journalArticle

    Space time adaptive processing
    Beamforming
    Covariance matrix
    Radar

    Matched Transmit-Receiver Design in Presence of Signal Dependent Interference

    Pillai, U., Oh, H. S., Guerci, J. R. & Youla, D. C., Mar 2000, In : IEEE Transactions on Information Theory. 1T-46, 3, p. 577-584 8 p.

    Research output: Contribution to journalArticle

    Optimum transmit-receiver design in the presence of signal-dependent interference and channel noise

    Pillai, U., Oh, H. S., Youla, D. C. & Guerci, J. R., 2000, In : IEEE Transactions on Information Theory. 46, 2, p. 577-584 8 p.

    Research output: Contribution to journalArticle

    Impulse response
    interference
    recipient
    simulation
    performance
    1999

    Blind image deconvolution using a robust GCD approach

    Pillai, U. & Liang, B., 1999, In : IEEE Transactions on Image Processing. 8, 2, p. 295-301 7 p.

    Research output: Contribution to journalArticle

    Highest common factor
    Deconvolution
    Polynomials
    Motion pictures
    Additive noise
    1997

    A new study of the problem of compatible impedances

    Youla, D. C., Winter, F. & Pillai, U., Nov 1997, In : International Journal of Circuit Theory and Applications. 25, 6, p. 541-560 20 p.

    Research output: Contribution to journalArticle

    Circuit theory
    Impedance
    Theorem
    Interpolation
    Z-matrix
    Parameterization
    Impulse response
    Transfer functions

    Wave-oriented signal processing of dispersive time-domain scattering data

    Carin, L., Felsen, L. B., Kralj, D. R., Oh, H. S., Lee, W. C. & Pillai, U., 1997, In : IEEE Transactions on Antennas and Propagation. 45, 4, p. 592-600 9 p.

    Research output: Contribution to journalArticle

    Signal processing
    Scattering
    Processing
    Wavelet transforms
    Fourier transforms
    1996

    Multichannel stable systems that extend the partial impulse response Matrices

    Lee Cheol, W. & Pillai, U., 1996, In : IEEE Transactions on Signal Processing. 44, 10, p. 2521-2536 16 p.

    Research output: Contribution to journalArticle

    Impulse response
    Transfer functions
    1994

    Dispersive modes in the time domain: analysis and time-frequency representation

    Carin, L., Felsen, L. B., Kralj, D., Pillai, U. & Lee, W. C., Jan 1994, In : IEEE Microwave and Guided Wave Letters. 4, 1, p. 23-25 3 p.

    Research output: Contribution to journalArticle

    time domain analysis
    Time domain analysis
    Processing
    Fourier transforms
    gratings
    1993

    A New Technique for ARMA-System Identification and Rational Approximation

    Pillai, U. & Shim, T. I., 1993, In : IEEE Transactions on Signal Processing. 41, 3, p. 1281-1304 24 p.

    Research output: Contribution to journalArticle

    Passive networks
    Transfer functions
    Identification (control systems)

    Block Toeplitz matrix inversion using Levinson polynomials

    Lee, W. C. & Pillai, U., Nov 1993, In : IEEE Transactions on Signal Processing. 41, 11

    Research output: Contribution to journalArticle

    Polynomials

    Uniqueness of a two-step predictor based spectral estimator that generalizes the maximum entropy concept

    Shim, T. I., Pillai, U. & Lee, W. C., Sep 1993, In : IEEE Transactions on Signal Processing. 41, 9, p. 2942-2946 5 p.

    Research output: Contribution to journalArticle

    Entropy
    Autocorrelation
    Mean square error
    1992

    A new spectrum extension method that maximizes the multistep minimum prediction error--Generalization of the maximum entropy concept

    Pillai, U., Shim, T. I. & Benteftifa, M. H., Jan 1992, In : IEEE Transactions on Signal Processing. 40, 1, p. 142-158 17 p.

    Research output: Contribution to journalArticle

    Autocorrelation
    Entropy
    Mean square error
    Power spectral density
    Random processes

    Theory and Design of Maximally Flat Low-Pass, High-Pass Reactance-Ladder Diplexers

    Youla, D. C., Pillai, U. & Winter, F., May 1992, In : IEEE Transactions on Circuits and Systems. 39, 5, p. 337-350 13 p.

    Research output: Contribution to journalArticle

    1990

    An algorithm for near-optimal placement of sensor elements

    Pearson, D., Pillai, U. & Lee, Y., Nov 1990, In : IEEE Transactions on Information Theory. 36, 6, p. 1280-1284 5 p.

    Research output: Contribution to journalArticle

    Sensors
    redundancy
    Direction of arrival
    Redundancy
    ability

    Image reconstruction from one bit of phase information

    Pillai, U. & Elliott, B., 1990, In : Journal of Visual Communication and Image Representation. 1, 2, p. 153-157 5 p.

    Research output: Contribution to journalArticle

    Image reconstruction
    Discrete Fourier transforms
    1989

    A self inversive array processing scheme for angle-of-arrival estimation

    Kwon, B. H. & Pillai, U., 1989, In : Signal Processing. 17, 3, p. 259-277 19 p.

    Research output: Contribution to journalArticle

    Array processing
    Asymptotic analysis
    White noise
    Covariance matrix

    A uniqueness characterization in terms of signed-magnitude for functions in the polydisc algebra

    Youla, D. C. & Pillai, U., Jun 1989, In : Journal of the Optical Society of America. 6, 6, p. 859-862

    Research output: Contribution to journalArticle

    uniqueness
    Algebra
    algebra
    polynomials
    Polynomials

    Coherent signal classification using symmetry considerations

    Pillai, U. & Lee, Y., Jan 1989, In : IEEE Transactions on Acoustics, Speech, and Signal Processing. 37, 1, p. 135-138 4 p.

    Research output: Contribution to journalArticle

    Direction of arrival
    Eigenvalues and eigenfunctions
    Sensors

    Forward/backward spatial smoothing techniques for coherent signal identification

    Pillai, U. & Kwon, B. H., Jan 1989, In : IEEE Transactions on Acoustics, Speech, and Signal Processing. 37, 1, p. 8-15 8 p.

    Research output: Contribution to journalArticle

    Covariance matrix
    Direction of arrival
    Sensors
    Asymptotic analysis
    White noise
    Covariance matrix
    Eigenvalues and eigenfunctions
    1987
    Covariance matrix
    Statistical methods
    Factorization
    Random variables
    Maximum likelihood
    1985

    A MAP Estimate that Maximizes Entropy—An Alternative Interpretation for an Autoregressive Model

    Pillai, U., 1985, In : Proceedings of the IEEE. 73, 4, p. 843-844 2 p.

    Research output: Contribution to journalArticle

    Entropy
    Extrapolation
    Probability density function
    Statistics

    NEW APPROACH TO ARRAY GEOMETRY FOR IMPROVED SPATIAL SPECTRUM ESTIMATION.

    Pillai, U., Bar-Ness, Y. & Haber, F., Oct 1985, In : Proceedings of the IEEE. 73, 10, p. 1522-1524 3 p.

    Research output: Contribution to journalArticle

    Geometry
    Covariance matrix
    1977

    Ultimate strength and design of concrete walls

    Pillai, U. & Parthasarathy, C. V., 1977, In : Building and Environment. 12, 1, p. 25-29 5 p.

    Research output: Contribution to journalArticle

    Bearings (structural)
    Concretes
    design method
    reinforcement
    Reinforcement
    1974

    BEAM-COLUMNS OF HOLLOW STRUCTURAL SECTIONS.

    Pillai, U., Dec 1974, In : Canadian Journal of Civil Engineering. 1, 2, p. 194-198 5 p.

    Research output: Contribution to journalArticle

    plastic
    Plastics
    Specifications