Nicholas K. Spencer

Publication Activity (10 Years)

Years Active: 1996-2011
Publications (10 Years): 0

Publications

Yuri I. Abramovich, Muralidhar Rangaswamy, Ben A. Johnson, Phillip M. Corbell, Nicholas K. Spencer
Performance Analysis of Two-Dimensional Parametric STAP for Airborne Radar using KASSPER Data. IEEE Trans. Aerosp. Electron. Syst. 47 (1) (2011)
Yuri I. Abramovich, Ben A. Johnson, Nicholas K. Spencer
Statistical nonidentifiability of close emitters: Maximum-likelihood estimation breakdown. EUSIPCO (2009)
Yuri I. Abramovich, Ben A. Johnson, Nicholas K. Spencer
Two-Dimensional Multivariate Parametric Models for Radar Applications - Part II: Maximum-Entropy Extensions for Hermitian-Block Matrices. IEEE Trans. Signal Process. 56 (11) (2008)
Yuri I. Abramovich, Ben A. Johnson, Nicholas K. Spencer
Two-Dimensional Multivariate Parametric Models for Radar Applications - Part I: Maximum-Entropy Extensions for Toeplitz-Block Matrices. IEEE Trans. Signal Process. 56 (11) (2008)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
GLRT-Based Threshold Detection-Estimation Performance Improvement and Application to Uniform Circular Antenna Arrays. IEEE Trans. Signal Process. 55 (1) (2007)
Yuri I. Abramovich, Nicholas K. Spencer, Michael D. E. Turley
Time-Varying Autoregressive (TVAR) Models for Multiple Radar Observations. IEEE Trans. Signal Process. 55 (4) (2007)
Yuri I. Abramovich, Nicholas K. Spencer
Diagonally Loaded Normalised Sample Matrix Inversion (LNSMI) for Outlier-Resistant Adaptive Filtering. ICASSP (3) (2007)
Yuri I. Abramovich, Nicholas K. Spencer, Michael D. E. Turley
Order Estimation and Discrimination Between Stationary and Time-Varying (TVAR) Autoregressive Models. IEEE Trans. Signal Process. 55 (6-2) (2007)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Bounds on maximum likelihood ratio-Part II: application to antenna array detection-estimation with imperfect wavefront coherence. IEEE Trans. Signal Process. 53 (6) (2005)
Yuri I. Abramovich, Nicholas K. Spencer, Pavel Turcaj
Two-set adaptive detection-estimation of Gaussian sources in Gaussian noise. Signal Process. 84 (9) (2004)
Nicholas K. Spencer, Yuri I. Abramovich
Performance analysis of DOA estimation using uniform circular antenna arrays in the threshold region. ICASSP (2) (2004)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Detection-estimation of more uncorrelated Gaussian sources than sensors in nonuniform linear antenna arrays. II. Partially augmentable arrays. IEEE Trans. Signal Process. 51 (6) (2003)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Detection-estimation of more uncorrelated Gaussian sources than sensors in nonuniform linear antenna arrays - part III: detection-estimation nonidentifiability. IEEE Trans. Signal Process. 51 (10) (2003)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
A lower bound for the maximum likelihood ratio: Sparse antenna array applications. ICASSP (2002)
Yuri I. Abramovich, Nicholas K. Spencer
DOA estimation performance breakdown: A new approach to prediction and cure. EUSIPCO (2002)
Yuri I. Abramovich, Nicholas K. Spencer
Locally optimal maximum-likelihood estimate of a Toeplitz matrix of given rank. ICASSP (2001)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Detection-estimation of more uncorrelated Gaussian sources than sensors in nonuniform linear antenna arrays .I. Fully augmentable arrays. IEEE Trans. Signal Process. 49 (5) (2001)
Yuri I. Abramovich, Nicholas K. Spencer
Detection nonidentifiability for independent Gaussian sources in nonuniform linear antenna arrays. ISSPA (2001)
Yuri I. Abramovich, Nicholas K. Spencer
Detection-estimation of more uncorrelated Gaussian sources than sensors using partially augmentable sparse antenna arrays. EUSIPCO (2000)
Yuri I. Abramovich, Nicholas K. Spencer, Stuart J. Anderson
Stochastic-constraints method in nonstationary hot-clutter cancellation. II. Unsupervised training applications. IEEE Trans. Aerosp. Electron. Syst. 36 (1) (2000)
Yuri I. Abramovich, Nicholas K. Spencer
Design of Nonuniform Linear Antenna Array Geometry and Signal Processing Algorithm for DOA Estimation of Gaussian Sources. Digit. Signal Process. 10 (4) (2000)
Yuri I. Abramovich, Vladimir Gaitsgory, Nicholas K. Spencer
Stability of manifold ambiguity resolution in DOA estimation with nonuniform linear antenna arrays. ICASSP (2000)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
DOA estimation for noninteger linear antenna arrays with more uncorrelated sources than sensors. IEEE Trans. Signal Process. 48 (4) (2000)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Resolving manifold ambiguities in direction-of-arrival estimation for nonuniform linear antenna arrays. IEEE Trans. Signal Process. 47 (10) (1999)
Yuri I. Abramovich, Nicholas K. Spencer, Vladimir Gaitsgory
Instability in DOA manifold ambiguity resolution. ISSPA (1999)
Nicholas K. Spencer
Nonlinear signal processing and nonuniform linear antenna array design for DOA estimation of coherent sources. NSIP (1999)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Positive-definite Toeplitz completion in DOA estimation for nonuniform linear antenna arrays. II. Partially augmentable arrays. IEEE Trans. Signal Process. 47 (6) (1999)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Identifiability and manifold ambiguity in DOA estimation for nonuniform linear antenna arrays. ICASSP (1999)
Yuri I. Abramovich, Nicholas K. Spencer
DOA outlier mitigation for generalised spatial smoothing. EUSIPCO (1998)
Yuri I. Abramovich, Douglas A. Gray, Alexei Y. Gorokhov, Nicholas K. Spencer
Positive-definite Toeplitz completion in DOA estimation for nonuniform linear antenna arrays. I. Fully augmentable arrays. IEEE Trans. Signal Process. 46 (9) (1998)
Yuri I. Abramovich, Nicholas K. Spencer
Generalised spatial smoothing using partial arrays for multiple target bearing estimation. ICASSP (1998)
Yuri I. Abramovich, Nicholas K. Spencer, Alexei Y. Gorokhov
Generalised augmentation approach for arbitrary linear antenna arrays. ICASSP (1997)
Yuri I. Abramovich, Douglas A. Gray, Nicholas K. Spencer, Alexei Y. Gorokhov
Ambiguities In Direction-Of-Arrival Estimation for Nonuniform Linear Antenna Arrays. ISSPA (1996)
Yuri I. Abramovich, Douglas A. Gray, Alexei Y. Gorokhov, Nicholas K. Spencer
Positive-definite Toeplitz completion in DOA estimation for fully-augmentable nonuniform linear antenna arrays. ICASSP (1996)
Yuri I. Abramovich, O. A. Gray, Alexei Y. Gorokhov, Nicholas K. Spencer
Comparison of DOA estimation performance for various types of sparse antenna array geometries. EUSIPCO (1996)