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Patrick Loughlin

Professor
Dr. Loughlin's Website Bioengineering Department

overview

Patrick Loughlin is a Professor and Associate Chair of Bioengineering. His research interests include sensory integration in motor control; control of human movement; sensory substitution, haptics, vibrotactile feedback; brain-computer interfaces; computational models; and signal processing. He was awarded the Chancellor’s Distinguished Research Award at the University of Pittsburgh in 1999, and received young investigator awards from the National Science Foundation (CAREER, 1996) and the Office of Naval Research (YIP, 1998). Dr. Loughlin is a Fellow of the American Institute for Medical and Biological Engineering (AIMBE), the Acoustical Society of America (ASA), and the Institute of Electrical and Electronics Engineers (IEEE). Please view my personal webpage for additional information.

about

(1999) Chancellor's Distinguished Research Award, University of Pittsburgh.

(1998) Co-Guest Editor, Multidimensional Systems and Signal Processing, Special Issue on "New Developments in Time-Frequency Analysis," vol. 9, no. 4. Oct. 1998..

(1998) ONR Young Investigator Award.

(1998) Board of Visitors Faculty Award, School of Engineering.

(1996) NSF Faculty Early Career Development (CAREER) Award.

PhD, Electrical Engineering, University of Washington, 1992

MS, Bioengineering, University of Utah, 1988

BS, Biomedical Engineering, Boston University, 1985

Lin, C.C., Whitney, S.L., Loughlin, P.J., Furman, J.M., Redfern, M.S., Sienko, K.H., & Sparto, P.J. (2018). The Use of Vibrotactile Feedback During Dual-Task Standing Balance Conditions in People With Unilateral Vestibular Hypofunction. OTOLOGY & NEUROTOLOGY, 39(5), E349-E356.Ovid Technologies (Wolters Kluwer Health). doi: 10.1097/MAO.0000000000001764.

Quick, K.M., Mischel, J.L., Loughlin, P.J., & Batista, A.P. (2018). The critical stability task: quantifying sensory-motor control during ongoing movement in nonhuman primates. JOURNAL OF NEUROPHYSIOLOGY, 120(5), 2164-2181.American Physiological Society. doi: 10.1152/jn.00300.2017.

Rosso, A.L., Cenciarini, M., Sparto, P.J., Loughlin, P.J., Furman, J.M., & Huppert, T.J. (2017). Neuroimaging of an attention demanding dual-task during dynamic postural control. GAIT & POSTURE, 57, 193-198.Elsevier BV. doi: 10.1016/j.gaitpost.2017.06.013.

Ben-Benjamin, J.S., Cohen, L., & Loughlin, P.J. (2015). A phase space approach to wave propagation with dispersion. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 138(2), 1122-1131.Acoustical Society of America (ASA). doi: 10.1121/1.4926562.

Hamschin, B.M., & Loughlin, P.J. (2015). Model-based waveform design for optimal detection: A multi-objective approach to dealing with incomplete a priori knowledge. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 138(5), 3220-3230.Acoustical Society of America (ASA). doi: 10.1121/1.4935519.

Lin, C.C., Whitney, S.L., Loughlin, P.J., Furman, J.M., Redfern, M.S., Sienko, K.H., & Sparto, P.J. (2015). The effect of age on postural and cognitive task performance while using vibrotactile feedback. JOURNAL OF NEUROPHYSIOLOGY, 113(7), 2127-2136.American Physiological Society. doi: 10.1152/jn.00083.2014.

Karim, H.T., Sparto, P.J., Aizenstein, H.J., Furman, J.M., Huppert, T.J., Erickson, K.I., & Loughlin, P.J. (2014). Functional MR imaging of a simulated balance task. BRAIN RESEARCH, 1555, 20-27.Elsevier BV. doi: 10.1016/j.brainres.2014.01.033.

Loughlin, P.J., & Cohen, L. (2016). Pulse propagation in wavelet phase space. In Automatic Target Recognition XXVI, 9844.SPIE. doi: 10.1117/12.2223992.

Gomatam, V.T., & Loughlin, P. (2015). Enhanced target versus clutter discrimination using time-frequency (LTV) filters. In Automatic Target Recognition XXV, 9476.SPIE. doi: 10.1117/12.2177253.

Loughlin, P.J. (2015). Misconceptions about instantaneous frequency, and complex signal representations through pole-zero manipulations. In Automatic Target Recognition XXV, 9476.SPIE. doi: 10.1117/12.2177266.

Gomatam, V.T., & Loughlin, P. (2014). Time-frequency filtering for classifying targets in nonstationary clutter. In Automatic Target Recognition XXIV, 9090.SPIE. doi: 10.1117/12.2050526.

Loughlin, P.J. (2014). Instantaneous frequency and the Wigner-Gabor signal. In Automatic Target Recognition XXIV, 9090.SPIE. doi: 10.1117/12.2050766.

Quick, K.M., Card, N.S., Whaite, S.M., Mischel, J., Loughlin, P., & Batista, A.P. (2014). Assessing vibrotactile feedback strategies by controlling a cursor with unstable dynamics. In Annu Int Conf IEEE Eng Med Biol Soc, 2014, (pp. 2589-2592).IEEE.United States. doi: 10.1109/EMBC.2014.6944152.

Gomatam, V.T., & Loughlin, P. (2013). Sonar signal feature extraction for target recognition in range-dependent environments. In Automatic Target Recognition XXIII, 8744, (pp. 8744-11).SPIE. doi: 10.1117/12.2016157.

Gomatam, V., & Loughlin, P. (2012). Dispersion-invariant features for classification of objects from their acoustic backscatter in a range-dependent channel. In Automatic Target Recognition XXII, 8391.SPIE. doi: 10.1117/12.918912.

Gomatam, V.T., & Loughlin, P.J. (2012). A Wigner phase space approximation for range-dependent propagation. In 11th European Conference on Underwater Acoustics 2012, ECUA 2012, 34 1(PART 3), (pp. 109-117).

Gomatam, V.T., & Loughlin, P. (2011). Impact of range dependent propagation on classification of underwater objects by their sonar backscatter. In Automatic Target Recognition XXI, 8049.SPIE. doi: 10.1117/12.884160.

Hamschin, B.M., & Loughlin, P.J. (2011). Waveform design with time and frequency constraints for optimal detection of elastic objects. In Automatic Target Recognition XXI, 8049.SPIE. doi: 10.1117/12.884134.

Loughlin, P., Mahboobin, A., & Furman, J. (2011). Designing vibrotactile balance feedback for desired body sway reductions. In Annu Int Conf IEEE Eng Med Biol Soc, 2011, (pp. 1310-1313).IEEE.United States. doi: 10.1109/IEMBS.2011.6090308.

Mahboobin, A., Cenciarini, M., Redfern, M.S., & Loughlin, P.J. (2011). Model-Based Investigation of Ankle Stiffness Control Versus Active Feedback Control During Quiet Standing. In ASME 2011 Summer Bioengineering Conference, Parts A and B, (PARTS A AND B), (pp. 1229-1230).American Society of Mechanical Engineers. doi: 10.1115/sbc2011-53425.

Hamschin, B., & Loughlin, P. (2010). Sonar waveform design for optimum target detection: The impact of object burial state. In OCEANS'10 IEEE SYDNEY.IEEE. doi: 10.1109/oceanssyd.2010.5603599.

Hamschin, B., & Loughlin, P. (2010). Optimal time and frequency domain waveform design for target detection. In Automatic Target Recognition XX; Acquisition, Tracking, Pointing, and Laser Systems Technologies XXIV; and Optical Pattern Recognition XXI, 7696.SPIE. doi: 10.1117/12.850594.

Hamschin, B., & Loughlin, P. (2010). Application of a minimum probability of error classifier with Linear Time-Varying pre-filters for buried target recognition. In OCEANS 2010 MTS/IEEE SEATTLE.IEEE. doi: 10.1109/oceans.2010.5664353.

Okopal, G., & Loughlin, P. (2010). Moment feature variability in uncertain propagation channels. In IET SIGNAL PROCESSING, 4(4), (pp. 457-464).Institution of Engineering and Technology (IET). doi: 10.1049/iet-spr.2009.0083.

Cenciarini, M., Loughlin, P.J., Sparto, P.J., & Redfern, M.S. (2009). Medial-lateral postural control in older adults exhibits increased stiffness and damping. In Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, (pp. 7006-7009).

Loughlin, P. (2009). Conditional and joint positive time-frequency distributions: a brief overview. In Mathematics for Signal and Information Processing, 7444.SPIE. doi: 10.1117/12.845988.

Okopal, G., & Loughlin, P. (2009). Moments of a wave propagating with dispersion and damping. In Automatic Target Recognition XIX, 7335.SPIE. doi: 10.1117/12.818993.

Okopal, G., & Loughlin, P.J. (2009). Moment feature variability in uncertain propagation channels. In Mathematics for Signal and Information Processing, 7444.SPIE. doi: 10.1117/12.834176.

Cohen, L., & Loughlin, P.J. (2007). Phase Space Approach and Approximations for Wave Propagation. In OCEANS 2007.IEEE. doi: 10.1109/oceans.2007.4449249.

Cohen, L., Davidson, K., & Loughlin, P. (2007). Constructing densities from moments. In Automatic Target Recognition XVII, 6566.SPIE. doi: 10.1117/12.720651.

Cohen, L., Loughlin, P., & Davidson, K. (2007). Construction of time-frequency representations from moments. In Advanced Signal Processing Algorithms, Architectures, and Implementations XVII, 6697.SPIE. doi: 10.1117/12.740191.

Okopal, G., & Loughlin, P. (2007). Propagation-invariant classification of shallow water sonar signals. In Proceedings of the Institute of Acoustics, 29(PART 6), (pp. 105-113).

Okopal, G., & Loughlin, P. (2007). Feature extraction for classification of signals propagating in channels with dispersion and dissipation. In Automatic Target Recognition XVII, 6566.SPIE. doi: 10.1117/12.720074.

Okopal, G., & Loughlin, P.J. (2007). Propagation-Invariant Classification of Signals in Channels with Dispersion and Damping. In OCEANS 2007, (pp. 1-8).IEEE. doi: 10.1109/oceans.2007.4449248.

Loughlin, P.J. (2006). Time-frequency approximations with applications to filtering, modulation, and propagation. In Advanced Signal Processing Algorithms, Architectures, and Implementations XVI, 6313.SPIE. doi: 10.1117/12.684023.

Loughlin, P.J. (2006). Effect of convolution and modulation on the time-varying spectrum of a signal, with application to target recognition. In Automatic Target Recognition XVI, 6234.SPIE. doi: 10.1117/12.668258.

Mahboobin, A., Loughlin, P., & Redfern, M. (2006). A model-based approach to attention and sensory integration in postural control of older adults. In Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, (pp. 1315-1318).

Okopal, G., Loughlin, P., & Cohen, L. (2006). Recognition of propagating vibrations and invariant features for classification. In Automatic Target Recognition XVI, 6234.SPIE. doi: 10.1117/12.668253.

Cohen, L., & Loughlin, P.J. (2004). Stationary phase approximation: a modification. In Automatic Target Recognition XIV, 5426, (pp. 227-233).SPIE. doi: 10.1117/12.542447.

Loughlin, P., & Cohen, L. (2004). A joint distribution approach to wave propagation and array processing. In 2004 Sensor Array and Multichannel Signal Processing Workshop, (pp. 576-579).

Loughlin, P.J., & Cohen, L. (2004). Phase-space approach to wave propagation with dispersion and damping. In Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, 5559, (pp. 221-231).SPIE. doi: 10.1117/12.564249.

Loughlin, P.J., & Cohen, L. (2004). Moment features invariant to dispersion. In Automatic Target Recognition XIV, 5426, (pp. 234-246).SPIE. doi: 10.1117/12.542424.

Loughlin, P.J., & Walia, A. (2004). A method to identify and restore a class of aliased signals. In Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, 5559, (pp. 184-191).SPIE. doi: 10.1117/12.564246.

Cohen, L., & Loughlin, P.J. (2003). The marginals and time-frequency distributions. In Advanced Signal Processing Algorithms, Architectures, and Implementations XIII, 5205, (pp. 59-74).SPIE. doi: 10.1117/12.513899.

Hahn, S.L. (2003). On the uniqueness of the definition of the amplitude and phase of the analytic signal. In Signal Processing, 83(8), (pp. 1815-1820).Elsevier BV. doi: 10.1016/s0165-1684(03)00073-2.

French, M., Loughlin, P., & Cohen, L. (2002). Cross time frequency spectra applied to automotive brake noise. In Proceedings of SPIE - The International Society for Optical Engineering, 4753 I, (pp. 457-460).

Loughlin, P., & Cohen, L. (2002). Local properties of dispersive pulses. In JOURNAL OF MODERN OPTICS, 49(14-15), (pp. 2645-2655).Informa UK Limited. doi: 10.1080/0950034021000016784.

Loughlin, P.J. (2002). Local spectral and spatial frequency moments of shallow-water sound propagation. In Advanced Signal Processing Algorithms, Architectures, and Implementations XII, 4791, (pp. 51-56).SPIE. doi: 10.1117/12.455784.

Mahboobin, A., Beck, C.L., Moeinzadeh, M.H., & Loughlin, P. (2002). Analysis and validation of a human postural control model. In Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301), 5, (pp. 4122-4128).IEEE. doi: 10.1109/acc.2002.1024576.

Loughlin, P.J. (2001). What are the time-frequency moments of a signal?. In Advanced Signal Processing Algorithms, Architectures, and Implementations XI, 4474, (pp. 35-44).SPIE. doi: 10.1117/12.448676.

Loughlin, P.J. (2001). Time-frequency moments, eyelets, and machine faults. In Wavelet Applications VIII, 4391, (pp. 44-50).SPIE. doi: 10.1117/12.421222.

Jang, S., & Loughlin, P.J. (2000). Use of instantaneous bandwidth for excising AM-FM jammers in direct-sequence spread-spectrum communication systems. In Advanced Signal Processing Algorithms, Architectures, and Implementations X, 4116, (pp. 80-90).SPIE. doi: 10.1117/12.406532.

Cakrak, F., & Loughlin, P.J. (1999). A new multi-window time-frequency approach yielding accurate low-order conditional moments. In Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020), 2, (pp. 1652-1656).IEEE. doi: 10.1109/acssc.1999.832028.

French, M., Cohen, L., & Loughlin, P. (1999). Application of time-frequency methods to sound quality analysis in automobiles. In Proceedings of SPIE - The International Society for Optical Engineering, 3807, (pp. 546-551).

French, M., Loughlin, P., Cohen, L., & Cakrak, F. (1999). Time-frequency analysis of automobile road data. In Proceedings of the International Modal Analysis Conference - IMAC, 1, (pp. 391-396).

Loughlin, P.J., & Davidson, K.L. (1999). Instantaneous bandwidth of multicomponent signals. In Proceedings of SPIE - The International Society for Optical Engineering, 3807, (pp. 610-624).

Nelson, D., Cristobal, G., Kober, V., Cakrak, F., Loughlin, P., & Cohen, L. (1999). Denoising using time-frequency and image processing methods. In Proceedings of SPIE - The International Society for Optical Engineering, 3807, (pp. 564-581).

Yoo, S., Loughlin, P.J., Redfern, M.S., & Furman, J.M. (1999). Postural sway response to chirp moving scene perturbations. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, 2, (p. 973).

Cakrak, F., & Loughlin, P.J. (1998). Instantaneous frequency estimation of polynomial phase signals. In Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 549-552).

Cakrak, F., & Loughlin, P.L. (1998). Multiple window non-linear time-varying spectral analysis. In Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 4, (pp. 2409-2412).IEEE. doi: 10.1109/icassp.1998.681636.

Emresoy, M.K., & Loughlin, P.J. (1998). Weighted least-squares implementation of Cohen-Posch time frequency distributions with specified conditional and joint moment constraints. In Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 305-308).

Loughlin, P.J. (1998). Moments and maximum entropy densities in time frequency. In Advanced Signal Processing Algorithms, Architectures, and Implementations VIII, 3461, (pp. 110-119).SPIE. doi: 10.1117/12.325672.

Loughlin, P.J. (1998). Local spectral and temporal characterizations of a wave. In Automatic Target Recognition VIII, 3371, (pp. 552-559).SPIE. doi: 10.1117/12.323873.

Loughlin, P.J. (1998). Time-dependent weighted average instantaneous frequency. In Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 97-100).

Loughlin, P.J., & Davidson, K.L. (1998). Positive local variances of time-frequency distributions and local uncertainty. In Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 541-544).

Shah, S.I., El-Jaroudi, A., Loughlin, P.J., & Chaparro, L.F. (1998). Signal synthesis and positive time frequency distributions. In Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 17-19).

Tacer, B., & Loughlin, P. (1998). Training-based approach to classification of unknown transients with unknown arrival time and Doppler shift. In Conference Record of the Asilomar Conference on Signals, Systems and Computers, 1, (pp. 887-891).

Loughlin, P., Groutage, D., & Rohrbaugh, R. (1997). Time-frequency analysis of acoustic transients. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3, (pp. 2125-2128).

Loughlin, P.J. (1997). Time-varying frequencies of a signal. In Advanced Signal Processing: Algorithms, Architectures, and Implementations VII, 3162, (pp. 109-122).SPIE. doi: 10.1117/12.284182.

Loughlin, P.J., & Bernard, G.D. (1997). The Applicability of Time-Frequency Analysis to Machine- and Process-Monitoring. In SAE Technical Paper Series, (pp. 243-252).SAE International. doi: 10.4271/972246.

Loughlin, P.J., Redfern, M.S., & Tacer, B. (1996). Time-varying characteristics of postural sway differ between balance impaired and unimpaired populations. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3, (pp. 1439-1442).

Tacer, B., & Loughlin, P.J. (1996). What are the joint time-frequency moments of a signal?. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 3, (pp. 1427-1430).

Tacer, B., & Loughlin, P.J. (1996). Time-frequency-based classification. In Advanced Signal Processing Algorithms, Architectures, and Implementations VI, 2846, (pp. 186-192).SPIE. doi: 10.1117/12.255432.

Loughlin, P.J., Pitton, J.W., & Hannaford, B. (1995). Fast approximations to positive time-frequency distributions, with applications. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2, (pp. 1009-1011).

Tacer, B., & Loughlin, P.J. (1995). Instantaneous frequency and time-frequency distributions. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2, (pp. 1013-1016).

Detka, C.S., Loughlin, P., & El-Jaroudi, A. (1994). On Combining Evolutionary Spectral Estimates. In IEEE Seventh SP Workshop on Statistical Signal and Array Processing, (pp. 243-246).IEEE. doi: 10.1109/ssap.1994.572489.

Loughlin, P., Schumann, T., Redfern, M., Furman, J., Chaparro, L., & El-Jaroudi, A. (1994). Time-frequency analysis of postural sway. In Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers, 1, (pp. 378-382).IEEE Comput. Soc. Press. doi: 10.1109/acssc.1994.471480.

Tacer, B., & Loughlin, P. (1994). Positive time-scale distributions. (pp. 201-204).

Pitton, J.W., Atlas, L.E., & Loughlin, P.J. (1993). Deconvolution for positive time-frequency distributions. In Conference Record of the Asilomar Conference of Signals, Systems & Computers, 2, (pp. 1450-1454).

Loughlin, P.J., Pitton, J.W., & Atlas, L.E. (1992). An information-theoretic approach to positive time-frequency distributions. In [Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 5, (pp. 125-128).IEEE. doi: 10.1109/icassp.1992.226642.

Loughlin, P.J., Pitton, J.W., & Atlas, L.E. (1992). Proper time-frequency energy distributions and the Heisenberg uncertainty principle. In [1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, (pp. 151-154).IEEE. doi: 10.1109/tftsa.1992.274214.

Atlas, L.E., Fang, J., Loughlin, P., & Music, W. (1991). Resolution advantages of quadratic signal processing. In Proceedings of SPIE - The International Society for Optical Engineering, 1566, (pp. 134-143).

Atlas, L.E., Loughlin, P.J., & Pitton, J.W. (1991). Truly nonstationary techniques for the analysis and display of voiced speech. In Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, 1, (pp. 433-436).

Atlas, L.E., Loughlin, P.J., & Pitton, J.W. (1991). A theory of desirable properties for preprocessors for speech recognizers. In IEEE Pacific Rim Conference on Communications, Computers and Signal Processing. Conference Proceedings, (pp. 803-806).

Fox, W.L.J., Luby, J.C., Pitton, J.W., Loughlin, P.J., & Atlas, L.E. (1991). Sonar and radar range-Doppler processing using a cone-shaped kernel time-frequency representation. In Conference Record - Asilomar Conference on Circuits, Systems & Computers, 2, (pp. 1079-1083).

Loughlin, P.J., Pitton, J.W., & Atlas, L.E. (1991). New properties to alleviate interference in time-frequency representations. In Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing, 5, (pp. 3205-3208).

Pitton, J.W., Fox, W.L.J., Atlas, L.E., Luby, J.C., & Loughlin, P.J. (1991). Range-Doppler processing with the cone kernel time-frequency representation. In IEEE Pacific Rim Conference on Communications, Computers and Signal Processing. Conference Proceedings, (pp. 799-802).

Atlas, L., Koolman, W., Loughlin, P., & Cole, R. (1990). New stationary techniques for the analysis and display of speech transients. In ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 1, (pp. 385-388).