Pitt | Swanson Engineering
Chaparro, Luis F
Electrical and Computer Engineering
Chaparro, Luis F
Professor Emeritus
Faculty
Emeritus Associate Professor
Office: 1238L Benedum Hall
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MS in Electrical Engineering and Computer Sciences, University of California, 1980

PhD in Electrical Engineering and Computer Sciences, University of California, 1980

BS in Electrical Engineering (with distinction), Union College, 1971

(2005) Beitle-Veltri Memorial Teaching Award of the School of Engineering.

(2003) Faculty Honor Roll of the School of Engineering.

(1996) Nomination to the school's Beite-Veltri Memorial Teaching Award.

(1986) Nomination from department faculty to the school's Beitle-Veltri Memorial Teaching Award.

Onen, E., Akan, A., and Chaparro, L.F., 2007, ""Time-Frequency Based Robust OFDM Channel Equalization,"," To appear in EUSIPCO-2007.

Can-Cimino, A., Chaparro, L.F., and Sejdic, E., 2014, "Asynchronous signal dependent non-uniform sampler," SPIE - Compressive Sensing III, pp. 910907-1-910907-10, Baltimore, MD, USA.

Can-Cimino, A., Sejdic, E., and Chaparro, L.F., 2014, "Asynchronous processing of sparse signals," IET Signal Processing, vol.8, no.3, pp. 257-266.

Chaparro, L.F., Sejdic, E., Can, A., Alkishriwo, O., Senay, S., and Akan, A., 2013, "Asynchronous representation and processing of non-stationary signal in a time-frequency context," IEEE Signal Processing Magazine, vol.30, no.6, pp. 42-52.

Sejdic, E., and Chaparro, L.F., 2013, ""A compressive sampling approach for brain-machine interfaces based on transcranial Doppler sonography: A case study of resting-state maximal cerebral blood velocity signals," 1st IEEE Global Conference on Signal and Information Processing (GlobalSIP 2013), pp. 13-16, Austin, Texas, USA.

Sejdic, E., and Chaparro, L.F., 2013, "A compressive sampling approach for brain-machine interfaces based on transcranial Doppler sonography: A case study of resting-state maximal cerebral blood velocity signals," 1st IEEE Global Conference on Signal and Information Processing (GlobalSIP 2013), pp. 13-16, Austin, Texas, USA.

Sejdic, E., and Chaparro, L.F., 2013, "A compressive sampling approach for brain-machine interfaces based on transcranial Doppler sonography: A case study of resting-state maximal cerebral blood velocity signals," 1st IEEE Global Conference on Signal and Information Processing (GlobalSIP 2013), pp. 13-16, Austin, Texas, USA.

Sejdic, E., and Chaparro, L.F., 2013, "Time-frequency representations based on compressive samples," 21st European Signal Processing Conference (EUSIPCO'13), pp. 1569742057-1-4, Marrakech, Morocco.

2012, ""Signal Compression using the Discrete Linear Chirp Form (DLCT),"," European Signal Proc. Conf. (EUSIPCO), Bucharest, Romania.

Alkishriwo, O., and Chaparro, L.F., 2012, ""A Discrete Linear Chirp Transform (DLCT) for Data Compression,"," IEEE Intl. Conference on Information Sciences, Signal Processing and its Applications, pp. 1316-1321, Montreal.

Can, A., Sejdic, E., Alkishriwo, O., and Chaparro, L.F., 2012, "A pediatric correlational study of stride interval dynamics, energy and activity," 2012 IEEE Statistical Signal Processing Workshop (SSP'12), pp. 740-743, Ann Arbor, MI, USA.

Can, A., Sejdic, E., Alkishriwo, O., and Chaparro, L.F., 2012, "Compressive asynchronous decomposition of heart sounds," 2012 IEEE Statistical Signal Processing Workshop (SSP'12), pp. 740-743, Ann Arbor, MI, USA.

Can, A., Sejdic, E., and Chaparro, L.F., 2012, "Asynchronous sampling and reconstruction of sparse signals," 20th European Signal Processing Conference (EUSIPCO'12), pp. 854-858, Bucharest, Romania.

Sejdic, E., and Chaparro, L.F., 2012, "Recovering heart sounds from sparse samples," 38th Annual Northeast Bioengineering Conference, pp. 383-384, Philadelphia, PA, USA.

Sejdic, E., Can, A., Chaparro, L.F., Steele, C.M., and Chau, T., 2012, "Compressive sampling of swallowing accelerometry signals using time-frequency dictionaries based on modulated discrete prolate spheroidal sequences," EURASIP Journal on Advances in Signal Processing, vol.2012, no.1, pp. 101-1-14.

Senay, S., Oh, J., and Chaparro, L.F., 2012, ""Regularized Signal Reconstruction for Level-Crossing Sampling using Slepian Functions,"," Signal Processing, vol.92, no.4, pp. 1157-1165.

Alkishriwo, O., and Chaparro, L.F., 2011, ""Signal Separation in the Wigner Distribution Domain Using Fractional Fourier Transform,"," EUSIPCO-2011, Barcelona, Spain.

Can, A., Sejdic, E., and Chaparro, L.F., 2011, "An asynchronous scale decomposition for biomedical signals," IEEE Signal Processing in Medicine and Biology Symposium (SPBM11), pp. 1-6, New York, USA.

Senay, S., Chaparro, L.F., Sun, M., Sclabassi, R., and Akan, A., 2011, ""Asynchronous Signal Processing for Brain Computer Interfaces,"," Turkish J. Elec. Eng. & Comp. Sci., vol.19, no.2.

Vallejo, L.E., Lalley, K., Long, M., and Chaparro, L.F., 2011, "Geotechnical engineering in the Americas before Columbus," Proceedings of the 14th Panamerican Conference on Soil Mechanics and Geotechnical Engineering, Toronto, Canada.

Aldirmaz, S., Durak, L., Akan, A., and Chaparro, L.F., 2010, ""A Signal-Adaptive Discrete Evolutionary Transform,"," EUSIPCO-2010, Aalborg, Denmark.

Huan, C., and Chaparro, L.F., 2010, ""Fuzzy Morphological Polynomial Image Representation; Article ID: 9141921,"," EURASIP Journal on Advances in Signal Processing, vol.2010, 15 pages.

Oh, J., Senay, S., and Chaparro, L.F., 2010, ""Signal Reconstruction from Nonuniformly Spaced Samples Using Evolutionary Slepian Transform-Based POCS; Article ID: 367317,"," EURASIP Journal on Advances in Signal Processing, vol.2010, 12 pages.

Onen, E., Akan, A., and Chaparro, L.F., 2010, ""A Discrete Fractional Evolutionary Transform,"," EUSIPCO-2010, Aalborg, Denmark.

Onen, E., Akan, A., and Chaparro, L.F., 2010, ""Time-Frequency Based Channel Estimation for High-Mobility OFDM Systems Part I: MIMO Case; Article ID: 549197,"," EURASIP Journal on Advances in Signal Processing, vol.2010.

Senay, S., Chaparro, L.F., Sclabassi, R., and Sun, M., 2010, ""Adaptive Level-crossing Sampling and Reconstruction,"," EUSIPCO-2010, Aalborg, Denmark.

Onen, E., Akan, A., and Chaparro, L.F., 2009, ""Channel Estimation for Fast-varying MIMO-OFDM Systems,"," EUSIPCO-2009, pp. 1190-1194, Scotland.

Senay, S., Chaparro, L.F., and Durak, L., 2009, ""Reconstruction of Nonuniformly Sampled Time-limited Signals using Prolate Spheroidal Wave Functions,"," Signal Processing, vol.89, pp. 2585-2595.

Senay, S., Chaparro, L.F., Sclabassi, R.J., and Sun, M., 2009, "Time encoding and reconstruction of multichannel data by brain implants using asynchronous sigma delta modulators.," Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, vol.2009, pp. 6893-6.

Senay, S., Chaparro, L.F., Sun, M., and Sclabassi, R., 2009, ""Asynchronous Sigma Delta Modulator Based Subdural Neural Implants for Epilepsy Patients,"," IEEE Northeast Bioengineering Conference (NEBEC), Cambridge, MA.

Senay, S., Chaparro, L.F., Sun, M., and Sclabassi, R., 2009, ""Asynchronous Signal Processing for Brain-computer Interfaces,"," Intl. Conference on Electrical and Electronics Engineering (ELECO), Bursa, Turkey.

Senay, S., Chaparro, L.F., Sun, M., and Sclabassi, R., 2009, ""Time-frequency Multiplexing for Time-encoded Signals for Brain-Computer Interfaces,"," European Signal Processing Conference (EUSIPCO-2009), pp. 1186-1189, Scotland.

Senay, S., Durak, L., and Chaparro, L.F., 2009, ""A Time-frequency Division Multiplexing Communications System with Hexagonal Lattice Structure,"," European Signal Processing Conference (EUSIPCO-2009), pp. 1181-1185, Scotland.

Senay, S., Chaparro, L.F., Sun, M., and Sclabassi, R., 2008, ""Compressive Sensing and Random Filtering of EEG Signals using Slepian Basis,"," EUSIPCO-2008, Switzerland.

Senay, S., Akan, A., and Chaparro, L.F., 2008, ""Sampling and Reconstruction of Non-bandlimited Signals using Slepian Functions,"," EUSIPCO-2008, Switzerland.

Ilgin, H., and Chaparro, L.F., 2007, ""Low Bit Rate Video Coding Using DCT-based fast Decimation/Interpolation and Embedded Zerotree Coding,"," IEEE Trans. Circuits and Systems for Video Tech., vol.17, no.7.

Onen, E., Akan, A., and Chaparro, L.F., 2007, ""Time-varying Channel Estimation for OFDM Systems,"," Proc. IEEE ICASSP 2007, III-12811284, Hawaii.

Xu, J., Sclabassi, R.J., Liu, Q., Chaparro, L.F., Marchessault, R., and Sun, M., 2007, "Human perception based video preprocessing for telesurgery.," Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, vol.2007, pp. 3086-9.

Akan, A., and Chaparro, L.F., 2006, ""Modeling and Estimation of Wireless OFDM Channels Using Time-frequency Analysis,"," Circuits, Systems and Signal Processing, vol.25, no.3, pp. 389-403.

Senay, S., Chaparro, L.F., and Akan, A., 2006, ""An Evolutionary Time-frequency Approach to Multi-carrier Wireless Communications,"," Proc. of SPIE, 63120W1-12.

Alshehri, A., Chaparro, L.F., and Akan, A., 2005, ""Evolutionary Wiener-Mask Receiver for Multiuser Direct Sequence Spread Spectrum,"," European Signal Proc. Conference (EUSIPC-2005), Antalya, Turkey.

Aysin, A., Chaparro, L.F., Grave, I., and Shusterman, V., 2005, ""Orthonormal-Basis Partitioning and Time-Frequency Representation of Cardiac Rhythm Dynamics,"," IEEE Trans. Biomedical Engineering, vol.52, no.5, pp. 878-889.

Ilgin, H., and Chaparro, L.F., 2005, ""Low Bit Rate Video Coding using DCT-based fast Decimation/Interpolation and Embedded Zerotree Coding,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP), II-317-320, Philadelphia, PA.

Senay, S., Akan, A., and Chaparro, L.F., 2005, ""Channel Modeling and Estimation for Robust MC-SS Systems,"," European Signal Proc. Conference (EUSIPC-2005), Antalya, Turkey.

Senay, S., Akan, A., and Chaparro, L.F., 2005, ""Time-frequency Channel Modeling and Estimation of Multi-carrier Spread Spectrum Communication Systems,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP), III-745-748, Philadelphia, PA.

Senay, S., Akan, A., and Chaparro, L.F., 2005, ""Time-frequency Channel Modeling and Estimation of Multi-carrier Spread Spectrum Communications Systems,"," J. Franklin Institute, vol.342, pp. 776-792.

Xu, J., Sclabassi, R.J., Lin, Q., Hu, C., Chaparro, L.F., and Sun, M., 2005, ""A Region-based Video Coding Method for Remote Monitoring of Neurosurgery,"," IEEE Annual Northeast Bioengineering Conference, pp. 89-91.

Xu, J., Ilgin, H., Liu, Q., Kassam, A., Sclabassi, R.J., Chaparro, L.F., and Sun, M., 2004, "Content-based video coding for remote monitoring of neurosurgery.," Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, vol.5, pp. 3136-9.

Xu, J., Ilgin, H., Sun, M., Sclabassi, R., and Chaparro, L.F., 2004, "Multi-channel Video for Patient Monitoring Based on DCT Compositing," IEEE Bioengineering Conference, pp. 63-64, Springfield, MA.

Chaparro, L.F., and Alshehri, L.F., 2003, "Jammer Excision in Spread Spectrum Communications via Wiener Masking and Frequency-frequency Evolutionary Transform," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-03), IV 473-476, Hong Kong.

Chaparro, L.F., and Suleesathira, R., 2003, ""Nonstationary Jammer Excision in Spread Spectrum Communications Using the Discrete Evolutionary and the Hough Transforms,"," Signal Processing, vol.83, pp. 1117-1133.

Aysin, B., Chaparro, L.F., and Shusterman, V., 2003, "Time-frequency Analysis of Cardiac Rhythm to Reveal Patterns of Adaptation to Orthostatic Challenges," IEEE Intl. Conf. on Engineering in Medicine and Biology, pp. 2562-2565.

Chien, J.C., Liu, L.C., Chaparro, L.F., and Li, C., 2003, ""A ROI DCT-based Transducer for Multi-user Video Conference,"," Proceedings of the 7th Joint Conference on Information Sciences, pp. 829-832, Cary, NC.

Suleesathira, R., and Chaparro, L.F., 2003, ""DOA Estimation Applying MUSIC on Malvar Wavelet-based Discrete Evolutionary Transform,"," Intl. Symposium on DSP and Communications Systems, Coolangatta, Australia.

Unsal-Artan, R.B., Akan, A., and Chaparro, L.F., 2003, ""Higher Order Evolutionary Spectral Analysis,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-03), VI-633-636, Hong Kong.

Chaparro, L.F., Suleesathira, R., Akan, A., and Unsal, B., 2001, ""Instantaneous Frequency Estimation using the Discrete Evolutionary Transform for Jammer Excision,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-01), Salt Lake City.

Akan, A., and Chaparro, L.F., 2001, ""Evolutionary Chirp Representation of Non-stationary Signals via Gabor Transform,"," Signal Processing, vol.81, pp. 2429-2436.

Chaparro, L.F., and Akan, A., 2000, ""Editorial for Special Issue on Time-Frequency Signal Analysis and its Applications,"," Journal of the Franklin Institute, vol.337, no.4.

Aysin, B., Chaparro, L.F., Grave, I., and Shusterman, V., 2000, ""Detection of Transients in Heart Rate Variability Signals using a Time-varying Karhunen-Loeve Expansion,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-00), VI 3586-99, Istanbul, Turkey.

Oh, J., and Chaparro, L.F., 2000, ""Adaptive Fuzzy Morphological Filtering of Impulse Noise in Images,"," Multidimensional Systems and Signal Processing, vol.11, pp. 233-256.

Oh, J., and Chaparro, L.F., 2000, ""Ranked Directional Morphological Filtering of Impulse Noise in Images,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-00), IV 2167-70, Istanbul, Turkey.

Shah, S.I., El-jaroudi, A., Loughlin, P.J., and Chaparro, L.F., 2000, ""Signal Synthesis and PositiveTime-frequency Distributions,"," J. Franklin Institute, vol.337, pp. 317-328.

Suleesathira, R., Chaparro, L.F., and Akan, A., 2000, ""Discrete Evolutionary Transform for Time-frequency Signal Analysis,"," J. Franklin Institute, vol.337, pp. 347-364.

Suleesathira, R., and Chaparro, L.F., 2000, ""Interference Mitigation in Spread Spectrum using Discrete Evolutionary and Hough Transforms,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-00), V 2821-24, Istanbul, Turkey.

Suleesathira, R., and Chaparro, L.F., 2000, ""Jammer Excision in Spread Spectrum using Discrete Evolutionary-Hough Transform and Singular Value Decomposition,"," IEEE Workshop on Statistical Signal and Array Processing, Poconos, PA.

Khan, H.A., and Chaparro, L.F., 1999, ""Formulation and Implementation of the Non-stationary Evolutionary Wiener Filtering,"," Signal Processing, vol.76, pp. 253-267.

Shah, S.I., Chaparro, L.F., and El-jaroudi, A., 1999, ""Generalized Transfer Function Estimation Using Evolutionary Spectral Deblurring,"," IEEE Trans. on Signal Processing, vol.47, no.8, pp. 2335-2339.

Chaparro, L.F., 1998, ""Evolutionary Analysis of Non-stationary Signals,"," Proc. Asilomar Conf. on Signals, Systems, and Computers, Special Session on Advances in Spectrum Analysis, pp. 277-281, Monterey, CA.

Aydin, A., and Chaparro, L.F., 1998, ""Signal Adaptive Evolutionary Analysis Using Instantaneous Frequency Estimation,"," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 661-664, Pittsburgh, PA.

Aysin, B., Chaparro, L.F., Grave, I., and Shusterman, V., 1998, ""Denoising of Non-stationary Signals Using Karhunen-Loeve Expansion,"," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 621-624, Pittsburgh, PA.

Oh, J., and Chaparro, L.F., 1998, ""Adaptive Fuzzy Morphological Filtering of Images,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-98), pp. 2901-2905, Seattle.

Shah, I., El-jaroudi, A., Loughlin, P.J., and Chaparro, L.F., 1998, ""Synthesis and Positive Time-Frequency Distributions,"," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 17-20, Pittsburgh, PA.

Shah, S.I., Chaparro, L.F., and El-jaroudi, A., 1998, ""Generalized Transfer Function Estimation Using Evolutionary Spectral Deblurring,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-98), pp. 2401-2405, Seattle.

Shah, S.I., Chaparro, L.F., El-jaroudi, A., and Furman, J.M., 1998, "Evolutionary Maximum Entropy Spectral Estimation and Heart Rate Variability Analysis," Multidimensional Systems and Signal Processing; Special Issue on Time-Frequency, vol.9, no.4, pp. 453-458.

Suleesathira, R., Akan, A., and Chaparro, L.F., 1998, ""Discrete Evolutionary Transform for Time-Frequency Analysis,"," Proc. Asilomar Conf. on Signals, Systems, and Computers, Special Session on Advances in Spectrum Analysis, pp. 812-816, Monterey, CA.

Suleesathira, R., and Chaparro, L.F., 1998, ""Evolutionary Spectral Analysis Using Malvar Wavelet Transform,"," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 673-676, Pittsburgh, PA.

Akan, A., and Chaparro, L.F., 1997, ""Multi-window Gabor Expansion for Evolutionary Spectral Analysis,"," Signal Processing, vol.63, pp. 249-262.

Almeida, M., and Chaparro, L.F., 1997, ""Complementary Filter Banks For Image Compression,"," SIB-GRAPI 97, X Brazilian Symposium on Computer Graphics and Image Processing, IEEE Computer Society, pp. 195-202, Brazil.

Cha, H., and Chaparro, L.F., 1997, "Adaptive Morphological Representation of Signals: Polynomial and Wavelet Methods," Multidimensional Systems and Signal Processing, vol.8, no.3, pp. 249-271.

Huang, C.P., Chaparro, L.F., and Vallejo, L.E., 1997, ""Fractal Dimension of Profiles and Surfaces using Fuzzy Morphological Covering,"," Engineering Geology, vol.48, no.3-4, pp. 245-253.

Khan, H., and Chaparro, L.F., 1997, ""Non-stationary Wiener Filtering Based on Evolutionary Spectral Theory,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-97), pp. 3677-80, Munich, Germany.

Shah, S.I., Loughlin, P.J., Chaparro, L.F., and El-jaroudi, A., 1997, ""Information Priors for Minimum Cross-Entropy Positive Frequency Distribution,"," IEEE Signal Processing Letters, vol.4, no.6, pp. 176-177.

Akan, A., and Chaparro, L.F., 1996, ""Evolutionary Spectral Analysis Using a Warped Gabor Expansion,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-96), pp. 1403-6, Atlanta.

Al-Shoshan, A., and Chaparro, L.F., 1996, ""Identification of Non-minimum Phase Systems using Evolutionary Spectral Theory,"," Signal Processing, vol.55, pp. 79-92.

El-jaroudi, A., Redfern, M.S., Chaparro, L.F., and Furman, J.M., 1996, "The Application of Time-Frequency Methods to the Analysis of Postural Sway," Proc. of IEEE Special Issue on Time-Frequency Applications, vol.84, no.9, pp. 1312-18.

Kosanovic, B., Chaparro, L.F., and Sclabassi, R.J., 1996, "Signal Modeling with Dynamic Fuzzy Sets," IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-96), pp. 2829-32, Atlanta.

Kosanovic, B.R., Chaparro, L.F., and Sclabassi, R.J., 1996, ""Signal Analysis in Fuzzy Information Space,"," Fuzzy Sets and Systems, vol.77, pp. 49-62.

Akan, A., and Chaparro, L.F., 1995, "Evolutionary Spectral Analysis and the Generalized Gabor Expansion," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-95), Detroit.

Kayhan, A.S., El-jaroudi, A., and Chaparro, L.F., 1995, "Data-Adaptive Evolutionary Spectral Estimation," IEEE Transactions on Signal Processing, vol.43, no.1, pp. 204-213.

Kosanovic, B.R., Chaparro, L.F., and Sclabassi, R.J., 1995, ""Hidden Process Modeling,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-95), Detroit.

Schumann, T., Redfern, M.S., Furman, J.M., El-jaroudi, A., and Chaparro, L.F., 1995, ""Time-frequency Analysis of Postural Sway,"," Journal of Biomechanics, vol.28, no.5, pp. 603-607.

Akan, A., and Chaparro, L.F., 1994, ""Adaptive Time-varying Parametric Modeling,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-94), Adelaide, Australia.

Al-Shoshan, A.I., and Chaparro, L.F., 1994, ""System Identification and Modeling of Non-stationary Signals using the Wold-Cramer Representation,"," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 421-424, Philadelphia, PA.

Kayhan, S.A., El-Jaroudi, A., and Chaparro, L.F., 1994, ""Evolutionary Periodogram for Non-stationary Signals,"," IEEE Trans. on Signal Processing, vol.42, pp. 527-1536.

Kosanovic, B.R., Chaparro, L.F., and Sclabassi, R.J., 1994, ""Modeling of Quasi-stationary Signals using Temporal Fuzzy Sets and Time-Frequency Distributions."," Proc. IEEE-SP Intl. Symposium on Time-Frequency and Time-Scale Analysis, pp. 425-428, Philadelphia, PA.

Kosanovic, B.R., Chaparro, L.F., Sun, M., and Sclabassi, R.J., 1994, ""Physical System Modeling using Temporal Fuzzy Sets,"," Proc. Intl. Joint Conf. of NAFIPS/IFIS/NASA'94, pp. 429-433, San Antonio, TX.

Shah, S.I., Chaparro, L.F., and El-jaroudi, A., 1994, ""Properties of the Evolutionary Maximum Entropy Spectral Estimator,"," Proc. IEEE Seventh Workshop on Statistical Signal and Array Processing, Quebec City, Canada.

Shah, S.I., Chaparro, L.F., and Kayhan, A.S., 1994, ""Evolutionary Maximum Entropy Spectral Analysis,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-94), Adelaide, Australia.

Chaparro, L.F., El-jaroudi, A., and Kayhan, S.A., 1993, ""Evolutionary Spectral Estimation of Non-Stationary Signals,"," In Fundamentals of Discrete-Time Systems, B. Anderson, N.K. Bose, M. Jamshidi, and M. Mansour, eds., TSI Press.

Cha, H., and Chaparro, L.F., 1993, ""A Morphological Polynomial Transform,"," IEEE Intl. Conf. on Acoustics, Speech and Sig. Proc. (ICASSP-93), Minneapolis, MN.

Cha, H., and Chaparro, L.F., 1993, "A Morphological Wavelet Transform," Proc. IEEE Systems, Man and Cybernetics Conference, Le Touquet, France.

Detka, C.S., El-jaroudi, A., and Chaparro, L.F., 1993, "Relating the Bilinear Distributions and the Evolutionary Spectrum,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP-93), Minneapolis, MN.

Chaparro, L.F., and El-jaroudi, A., 1992, ""The Development of a Real-Time Signal Processing Laboratory,"," Proc. of the Annual Conference of the American Society for Engineering Education, pp. 402-405, Toledo, Ohio.

Chaparro, L.F., and Luo, L., 1992, ""Identification of Two-Dimensional Systems using Sum-of-Cumulants,"," Proc. IEEE Intl. Conf. on Acoustics, Speech and Signal Processing, V 481-84, San Francisco.

Chaparro, L.F., and Luo, L., 1992, "Identification of Mixed-phase Systems from Frequency Slices of the Bispectrum," Journal of the Franklin Institute, vol.329, pp. 511-520.

Detka, C.S., El-jaroudi, A., and Chaparro, L.F., 1992, ""Evolutionary Periodogram and Bilinear Distributions as Evolutionary Spectral Estimators,"," IEEE Digital Signal Proc. Workshop, 1.2.1-2, Starved Rock, IL.

Kayhan, A.S., Chaparro, L.F., and El-jaroudi, A., 1992, "Wold-Cramer Evolutionary Spectral Estimators," IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, pp. 115-118, Victoria, BC.

Kayhan, A.S., El-jaroudi, A., and Chaparro, L.F., 1992, ""Evolutionary Autocorrelation Estimation forNon-Stationary Processes,"," Proc. 1992 Conf. on Info, Science and Systems, p. 77.

Mallikarjuna, H.S., and Chaparro, L.F., 1992, ""Iterative Composite Filtering for Image Restoration,"," IEEE Trans. on Pattern Analysis and Machine Intelligence, vol.14, pp. 674-678.

Kayhan, A.S., El-jaroudi, A., and Chaparro, L.F., 1991, "Minimum-variance Evolutionary Spectral Estimation of Nonstationary Signals," IEEE International Conference on Acoustics, Speech and Signal Processing, Toronto.

Luo, L., and Chaparro, L.F., 1991, ""Parametric Identification of Systems Using a Frequency Slice of the Biospectrum,"," IEEE International Conference on Acoustics, Speech and Signal Processing, Toronto.

Bayya, A., and Chaparro, L.F., 1990, ""Reconstruction of Signals from Sign Information Alone,"," Journal of the Franklin Institute, pp. 993-1001.

Lu, H.Q., and Chaparro, L.F., 1990, "Recursive Solution and Stability Conditions for 2-D Least-squares Modeling and Stabilization Problems," Journal of the Franklin Institute, pp. 259-271.

Phelps, J., Kamen, E.W., and Chaparro, L.F., 1990, ""On the Relationship Between External andInternal Stability of Linear Time-varying Systems,"," IEEE International Symposium on Circuits and Systems, New Orleans.

Chaparro, L.F., and Boudaoud, M., 1989, ""Nonstationary Composite Modeling of Images,"," IEEE Trans. on Systems, Man and Cybernetics, vol.19, pp. 112-117.

Kamen, E., Phelps, J., and Chaparro, L.F., 1988, ""Steady-State and Transient Behavior of LinearTime-Varying Discrete-Time Systems,"," Conference on Information Sciences and Systems, Princeton, NJ.

Mallikarjuna, H., and Chaparro, L.F., 1988, ""Image Restoration Using Nonstationary and Space-Varying Models,"," Conference on Information Sciences and Systems, Princeton University, NJ.

Chaparro, L.F., and Bayya, A., 1987, ""Non Iterative Reconstruction of Signals from Signed Fourier Transform Magnitude,"," Journal of the Franklin Institute, vol.322, pp. 27-42.

Chaparro, L.F., and Bayya, A., 1987, ""Non-Iterative Signal Reconstruction from Signed Fourier Transform Magnitude,"," IEEE International Symposium on Circuits and Systems, Philadelphia, PA.

Chaparro, L.F., and Boudaoud, M., 1987, ""Two-Dimensional Linear Prediction Covariance Method and Its Recursive Solution,"," IEEE Trans. on Systems, Man and Cybernetics, vol.17, pp. 617-621.

Boudaoud, M., and Chaparro, L.F., 1987, ""Composite Modeling of Nonstationary Signals,"," Journal of the Franklin Institute, vol.324.

Mallikarjuna, H., and Chaparro, L.F., 1987, ""Image Restoration by Composite Filtering,"," Information Science and Systems Conference, The John Hopkins University, Baltimore, MD.

Chaparro, L.F., and Bayya, A., 1986, ""Recursive Reconstruction of Sequences from Group Delay,"," Journal of the Franklin Institute, vol.322, pp. 93-101.

Chaparro, L.F., and Boudaoud, M., 1986, ""Image Multimodeling and a Two-Dimensional Multicategory Wiener Filter,"," IEEE Trans. on Systems, Man and Cybernetics, vol.16, pp. 312-315.

Chaparro, L.F., and Boudaoud, M., 1986, ""Modeling of 2-D Nonstationary Signals"," Conference on Information Sciences and Systems, Princeton, NJ.

Chaparro, L.F., and Boudaoud, M., 1986, "Two-Dimensional Space-Varying Autoregressive Modeling and Its Application to Image Processing," ASSP Spectrum Estimation Workshop III, Boston, MA.

Chaparro, L.F., and Shufelt, G., 1986, ""Least Squares Design of Two-Dimensional Recursive Filters with Specified Magnitude and Linear Phase,"," Journal of the Franklin Institute, vol.321, pp. 241-249.

Chaparro, L.F., and Shufelt, G., 1986, ""Rational Models for Quasiperiodic Signals,"," Proceedings of the IEEE, vol.74, pp. 611-613.

Chaparro, L.F., Kanefsky, M., and Papoutsis, T., 1986, ""The Use of Multiple Sources for the Modeling and Coding of Nonstationary Images,"," IEEE Trans. on Systems, Man and Cybernetics, vol.16, pp. 482-486.

Chaparro, L.F., and Boudaoud, M., 1985, ""Recursive Solution of the Covariance Equations for Linear Prediction"," Conference on Information Sciences and Systems, The John Hopkins University, Baltimore, MD.

Chaparro, L.F., and Boudaoud, M., 1985, ""Recursive Solution of the Covariance Equations for Linear Prediction,"," Journal of the Franklin Institute, vol.320, pp. 161-167.

Chaparro, L.F., 1984, ""Two-Dimensional Spectral Factorization," Special Issue on Aspects of Spatial and Temporal Signal Processing," Circuits, Systems and Signal Processing, vol.3, pp. 194-206.

Chaparro, L.F., and Bournas, R., 1984, ""Sufficient Conditions for Minimum Phase Two-Dimensional PLSIs,"," IEEE Trans. Acoustics, Speech and Signal Processing, vol.32, pp. 916-918.

Boudaoud, M., and Chaparro, L.F., 1984, ""Image Multimodeling and a Two- Dimensional MulticategoryWiener Filter"," Conference on Information Sciences and Systems, Princeton, NJ.

Papoutsis, T., Chaparro, L.F., and Kanefsky, M., 1984, ""An Improved Approximation Image for Multiple Source Codes"," Allerton Conference on Communications, Control, and Computing, Urbana, IL.

Papoutsis, T., Kanefsky, M., and Chaparro, L.F., 1984, ""Multiple Source Coding of NonstationaryImages"," Conference on Information Sciences and Systems, Princeton, NJ.

Chaparro, L.F., 1983, ""Recursive Phase-Reconstruction of 1-D and 2-D Signals"," IEEE International Symposium on Circuits and Systems, Newport Beach, CA.

Chaparro, L.F., 1983, ""Recursive Two-Dimensional Spectral Factorization"," ASSP Spectrum Estimation Workshop II, Tampa, FL.

Chaparro, L.F., and Bournas, R., 1983, ""A Recursive Approach to Two-Dimensional Spectral Factorization"," Conference on Information Sciences and Systems, The John Hopkins University, Baltimore, MD.

Chaparro, L.F., and Hou, W., 1983, ""Pole-Zero Modeling of 1-D and 2-D Discrete Signals"," Modeling and Simulation Conference, University of Pittsburgh, Pittsburgh, PA.

Chaparro, L.F., 1982, ""Asymmetric Half-Plane Planar Least-Squares Inverses"," IEEE International Conference on Acoustics, Speech and Signal Processing, Paris, France.

Chaparro, L.F., 1982, ""Identification of Two-Dimensional Rational Systems"," Conference on Information Sciences and Systems, Princeton University, NJ.

Chaparro, L.F., and Jury, E.I., 1982, ""Rational Approximation of Two-Dimensional Discrete Systems,"," IEEE Trans. Acoustics, Speech and Signal Processing, vol.30, pp. 780-787.

Chaparro, L.F., and Jury, E., 1980, ""Rational Modelling of Two-Dimensional Linear Shift-Invariant Digital System"," European Signal Processing Conference, EUSIPCO, Lausanne, Switzerland.

Jury, E.I., and Chaparro, L.F., 1979, ""Remark on an Equivalent Relation in Least Squares Approximation,"," Proceedings of the IEEE, vol.67, pp. 1444-1445.

Mansour, M., Jury, E.I., and Chaparro, L.F., 1979, ""Estimation of the Margin of Stability for Linear Continuous and Discrete Systems,"," International Journal of Control, vol.30, pp. 49-69.

Anderson, B., Jury, E.I., and Chaparro, L.F., 1976, "On the Root Distribution of Real Polynomial with Respect to the Unit Circle," Regelungstechnik, vol.24, pp. 101-102.

Anderson, B., Jury, E.I., and Chaparro, L.F., 1975, ""Relations Between Real and Complex Polynomials for Stability and Aperiodicity Conditions,"," IEEE Trans. on Automatic Control, vol.20, pp. 244-246.

Chaparro, L.F., and Suleesathira, R., ""Jammer Excision in Spread Spectrum Communications via Discrete Evolutionary Transform,"," Intl. Conf. on Electrical and Electronics Eng, ELECO-01, VI-633-636, Bursa, Turkey.

Huang, C.P., and Chaparro, L.F., ""Signal Representation using Fuzzy Morphology,"," Proc. ISUMA-NAFIPS'95, pp. 607-612, College Park, MD.

Kahn, M., Chaparro, L.F., and Kamen, E., ""Frequency Analysis of Nonstationary Signal Models,"," Conference on Information Sciences and Systems, The John Hopkins University, Baltimore, MD.

Kayhan, A., and Chaparro, L.F., ""Nonstationary Composite Image Modeling and Two-sourceCoding,"," IEEE International Symposium on Circuits and Systems, pp. 21-24, Portland, OR.

Kayhan, A., and Chaparro, L.F., ""Space-varying and Adaptive Models for Image Coding,"," Conference on Information Sciences and Systems, Princeton University, NJ.

Kosanovic, B., Chaparro, L.F., and Sclabassi, R.J., ""On Estimation of Temporal Fuzzy Sets for Signal Analysis: FCM vs FMLE Approaches,"," Proc. ISUMA-NAFIPS'95, pp. 583-588, College Park, MD.

Luo, L., and Chaparro, L.F., ""Identification of Nonminimum-phase Systems from Slices of thePhase of the Bispectrum,"," Conference on Information Sciences and Systems, Princeton University, NJ.

Mallikarjuna, H., and Chaparro, L.F., ""Iterative Composite Filtering for Image Restoration,"," IEEE International Symposium on Circuits and Systems, pp. 1532-35, Portland, OR.

Onen, E., Akan, A., and Chaparro, L.F., ""Time-Frequency Based Robust OFDM Channel Equalization,"," European Signal Processing Conference, EUSIPCO 2007, pp. 493-496, Poznan, Poland.

Onen, E., Akan, A., and Chaparro, L.F., ""Time-Varying Channel Estimation for OFDM Systems,"," 2007 IEEE International Conference on Acoustic, Speech and Signal Processing, ICASSP-2007, pp. 1281-1284, Honolulu, Hawaii, USA.

Onen, E., Akan, A., and Chaparro, L.F., "Time-Frequency Channel Equalization for Wireless OFDM Systems," International Conference on Electrical and Electronics Engineering, ELECO2007, Bursa, Turkey.

Senay, S., Chaparro, L.F., and Akan, A., ""Chirp Channel Estimation and OFDM Transmission Using Discrete Prolate Spheroidal Sequences,"," IASTED International Conference on Signal Processing, Pattern Recognition, and Applications, SPPRA-2008, Innsbruck, Austria.

Senay, S., Chaparro, L.F., and Akan, A., ""Slepian Bases and Chirp-based Channel Estimation for Orthogonal Frequency Division Multiplexing (OFDM) Systems,"," International Conference on Electrical and Electronics Engineering, ELECO2007, Bursa, Turkey.

Senay, S., Chaparro, L.F., Sun, M., and Sclabassi, R., ""Slepian-based Compressive Sensing and Random Filtering of EEG Signals,"," Northeast Bio-Engineering Conf..

Senay, S., Akan, A., and Chaparro, L.F., ""A New Spreading Code for Multi-carrier Spread Spectrum Systems, 13"," IEEE Signals Processing and Communication Applications Conference, SIU-2005, Kayseri, Turkey.

Senay, S., Akan, A., and Chaparro, L.F., ""Channel Modeling and Estimation for Multi-carrier Communications Systems,"," Elektrik Elektronik Bilgisayar Muhendisligi Sempozyumu, ELECO-2004, pp. 189-192, Bursa, Turkey.

Can-Cimino, A., Chaparro, L.F., and Sejdic, E., 2014, "Asynchronous signal dependent non-uniform sampler," SPIE - Compressive Sensing III, Baltimore, MD, USA.

Sejdic, E., and Chaparro, L.F., 2013, "A compressive sampling approach for brain-machine interfaces based on transcranial Doppler sonography: A case study of resting-state maximal cerebral blood velocity signals," 1st IEEE Global Conference on Signal and Information Processing (GlobalSIP 2013), Austin, Texas, USA.

Sejdic, E., and Chaparro, L.F., 2013, "Time-frequency representations based on compressive samples," 21st European Signal Processing Conference (EUSIPCO'13), Marrakech, Morocco.

Sejdic, E., and Chaparro, L.F., 2012, "Recovering heart sounds from sparse samples," 38th Annual Northeast Bioengineering Conference, Philadelphia, PA, USA.

Sejdic, E., and Chaparro, L.F., 2012, "Recovering heart sounds from sparse samples," 38th Annual Northeast Bioengineering Conference, Philadelphia, PA, USA.

Can, A., Sejdic, E., and Chaparro, L.F., 2011, "An asynchronous scale decomposition for biomedical signals," IEEE Signal Processing in Medicine and Biology Symposium (SPBM11), New York, USA.

Sejdic, E., and Chaparro, L.F., 2012, "Compressive sampling of biomedical signals using time-frequency dictionaries based on modulated discrete prolate spheroidal sequences," 61/681427.

Shusterman, V., Aysin, B., Grave, I., Chaparro, L.F., and Anderson, K., "System for Prediction Cardiac Arrhythmias," Patent WO 99/56220, PCT/US99/09189..

Shusterman, V., Aysin, B., Grave, I., Chaparro, L.F., and Anderson, K., 1999, "System for Prediction Cardiac Arrhythmias," 5967995.