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Journal Article
Garg, V., I. Santamaría, D. Ramírez, and L. L. Scharf, "Subspace Averaging and Order Determination for Source Enumeration", IEEE Transactions on Signal Processing, vol. 67, issue 11, pp. 3028-3041, June, 2019. PDF icon PDF Version (660.41 KB)
Santamaría, I., L. L. Scharf, and D. Ramírez, "Scale-Invariant Subspace Detectors based on First and Second-Order Statistical Models", IEEE Transactions on Signal Processing, vol. 68, pp. 6432-6443, 2020. PDF icon PDF Version (2.64 MB)
Santamaría, I., L. L. Scharf, J. Vía, Y. Wang, and H. Wang, "Passive Detection of Correlated Subspace Signals in Two MIMO Channels", IEEE Transactions on Signal Processing, vol. 65, issue 20, pp. 5266-5280, October, 2017. PDF icon PDF Version (1.22 MB)
Ramírez, D., I. Santamaría, L. L. Scharf, and S. Van Vaerenbergh, "Multi-Channel Factor Analysis with Common and Unique Factors", IEEE Transactions on Signal Processing, vol. 68, issue 1, pp. 113-126, 2020. PDF icon PDF Version (2.53 MB)
Ramírez, D., J. Vía, I. Santamaría, and L. L. Scharf, "Locally Most Powerful Invariant Tests for Correlation and Sphericity of Gaussian Vectors", IEEE Transactions on Information Theory, vol. 59, pp. 2128–2141, April, 2013. PDF icon PDF Version (2.56 MB)
Ramírez, D., J. Vía, I. Santamaría, and L. L. Scharf, "Detection of Spatially Correlated Gaussian Time Series", IEEE Transactions on Signal Processing, vol. 58, no. 10, pp. 5006–5015, October, 2010. PDF icon PDF Version (830.05 KB)
Ramírez, D., P. J. Schreier, J. Vía, I. Santamaría, and L. L. Scharf, "Detection of Multivariate Cyclostationarity", IEEE Transactions on Signal Processing, vol. 63, issue 20, pp. 5395-5408, October, 2015. PDF icon PDF Version (2.61 MB)
Conference Paper
Santamaría, I., L. L. Scharf, V. Garg, and D. Ramírez, "Subspace Averaging in Multi-Sensor Array Processing", SIAM Conference on Applied Algebraic Geometry, Bern, Switzerland, July, 2019. PDF icon PDF Version (1.24 MB)
Santamaría, I., D. Ramírez, and L. L. Scharf, "Subspace Averaging for Source Enumeration in Large Arrays", IEEE Statistical Signal Processing Workshop (SSP), Freiburg, Germany, June, 2018. PDF icon PDF Version (253.86 KB)
Ramírez, D., P. J. Schreier, J. Vía, I. Santamaría, and L. L. Scharf, "A Regularized Maximum Likelihood Estimator for the Period of a Cyclostationary Process", Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, USA, November, 2014. PDF icon PDF Version (192.68 KB)
Santamaría, I., L. L. Scharf, D. Cochran, and J. Vía, "Passive Detection of Rank-One Signals with a Multiantenna Reference Channel", 24th European Signal Processing Conference (EUSIPCO 2016), Budapest, Hungary, pp. 140-144, September, 2016. PDF icon PDF Version (153.26 KB)
Ramírez, D., I. Santamaría, and L. L. Scharf, "Passive Detection of Rank-one Gaussian Signals for Known Channel Subspaces and Arbitrary Noise", IEEE International Conference on Acoustics Speech and Signal Processing, Rhodes, Greece, June, 2023. PDF icon PDF Version (236.7 KB)
Santamaría, I., L. L. Scharf, C. Peterson, M. Kirby, and J. Francos, "An order fitting rule for optimal subspace averaging", IEEE Workshop on Statistical Signal Processing (SSP), Palma de Mallorca, June , 2016. PDF icon PDF Version (191.18 KB)
Ramírez, D., J. Vía, I. Santamaría, and L. L. Scharf, "Multi-Sensor Beamsteering Based on the Asymptotic Likelihood for Colored Signals", IEEE Workshop on Statistical Signal Processing (SSP 2011), Nice, France, June, 2011. PDF icon PDF Version (448.28 KB)
Ramírez, D., J. Vía, I. Santamaría, and L. L. Scharf, "Multiple-Channel Detection of a Gaussian Time Series over Frequency-Flat Channels", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2011), Prague, Czech Republic, May, 2011. PDF icon PDF Version (147.71 KB)
Ramírez, D., J. Vía, I. Santamaría, R. López-Valcarce, and L. L. Scharf, "Multiantenna Spectrum Sensing: Detection of Spatial Correlation Among Time-Series With Unknown Spectra", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2010), Dallas, USA, March, 2010. PDF icon PDF Version (225.59 KB)
Ramírez, D., J. Iscar, J. Vía, I. Santamaría, and L. L. Scharf, "The Locally Most Powerful Invariant Test for Detecting a Rank-P Gaussian Signal in White Noise", 7th IEEE Sensor Array and Multichannel Signal Processing Workshop, Hoboken, NJ, USA, June, 2012. PDF icon PDF Version (378.62 KB)
Stanton, G., D. Ramírez, I. Santamaría, L. L. Scharf, and H. Wang, "Identifiability in Multi-Channel Factor Analysis", Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, November, 2023. PDF icon PDF Version (305.28 KB)
Santamaría, I., J. Vía, L. L. Scharf, and Y. Wang, "A GLRT approach for detecting correlated signals in white noise in two MIMO channels", European Signal Processing Conference (EUSIPCO), Kos, Greece, August, 2017. PDF icon PDF Version (363.75 KB)
Yavo, Z., J. Francos, I. Santamaría, and L. L. Scharf, "Estimating the mean manifold of a deformable object from noisy observations", IEEE Image Video and Multidimensional Signal Processing Workshop (IVMSP) , Bordeaux,France, IEEE, July, 2016. PDF icon PDF Version (679.87 KB)
Santamaría, I., J. Vía, M. Kirby, T. Marrinan, C. Peterson, and L. L. Scharf, "Constrained subspace estimation via convex optimization", European Signal Processing Conference (EUSIPCO), Kos, Greece, August, 2017. PDF icon PDF Version (405.47 KB)
Wang, Y., L. L. Scharf, I. Santamaría, and H. Wang, "Canonical Correlations for Target Detection in a Passive Radar Network", Asilomar Conference on Signals, Systems and Computers (ASILOMAR), Pacific Grove (CA), USA, IEEE, November, 2016. PDF icon PDF Version (197.45 KB)
Ramírez, D., P. J. Schreier, J. Vía, I. Santamaría, and L. L. Scharf, "An asymptotic LMPI test for cyclostationarity detection with application to cognitive radio", IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brisbane, Australia, April, 2015. PDF icon PDF Version (259.68 KB)
Ramírez, D., L. L. Scharf, J. Vía, I. Santamaría, and P. J. Schreier, "An asymptotic GLRT for the detection of cyclostationary signals", International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Florence, Italy, May, 2014. PDF icon PDF Version (292.46 KB)
Ramírez, D., I. Santamaría, S. Van Vaerenbergh, and L. L. Scharf, "An alternating optimization algorithm for two-channel factor analysis with common and uncommon factors", 52nd Asilomar Conference on Signals, Systems and Computers, Pacific Grove (CA), USA, IEEE, October, 2018. PDF icon PDF Version (206.51 KB)
Book
Ramírez, D., I. Santamaría, and L. L. Scharf, Coherence in Signal Processing and Machine Learning: Springer, 2022. PDF icon PDF Version (146.4 KB)

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