• R. M. Narayanan, M. C. Shastry, P.-H. Chen and M. Levi, "Through-the-Wall Detection of Stationary Human Targets Using Doppler Radar," Progress in Electromagnetics Research B, Vol. 20, 147-166, 2010.
• C.P. Lai and R.M. Narayanan, “Ultrawideband Random Noise Radar Design for Through-Wall Surveillance,” IEEE Transactions on Aerospace and Electronic Systems, in press (submitted September 2007, revised and resubmitted July 2008 and January 2009, accepted March 2009).

• H. Wang, R.M. Narayanan, and Z.O. Zhou, “Through-Wall Imaging of Moving Targets using UWB Random Noise Radar,” IEEE Antennas and Wireless Propagation Letters, Vol. 8, pp. 802–805, 2009.

• R.M. Narayanan, J. Chuang, and K.M. Mohan, “Propagation Effects on Noise-Modulated Randomly Polarized Ultrawideband Communication System,” IETE Technical Review, Vol. 26, No. 4, pp. 303–308, July-August 2009.

• J. Chuang, M.W. DeMay, and R.M. Narayanan, “Design, Analysis, and Performance of a Noise Modulated Covert Communications System,” EURASIP Journal on Wireless Communications and Networking, Vol. 2008, Article ID 979813 (13 pages), doi:10.1155/2008/979813, 2008.

• Z. Li and R.M. Narayanan, “Manoeuvring Target Motion Parameter Estimation for ISAR Image Fusion,” IET Signal Processing, Vol. 2, No. 3, pp. 325–334, September 2008.

• R.M. Narayanan, “Through-Wall Radar Imaging Using UWB Noise Waveforms,” Journal of the Franklin Institute, Vol. 345, No. 6, pp. 659–678, September 2008.

• C.P. Lai, R.M. Narayanan, Q. Ruan, and A. Davydov, “Hilbert-Huang Transform (HHT) Analysis of Human Activities Using Through-Wall Noise and Noise-Like Radar,” IET Radar, Sonar, and Navigation, Vol. 2, No. 4, pp. 244–255, August 2008.

• S. Papson and R.M. Narayanan, “Persistence Modeling of Angularly Dependent Synthetic Aperture Radar Imagery,” Journal of Electronic Imaging, Vol. 17, No. 3, Paper Number 033013 (9 pages), doi:10.1117/1.2952592, July-September 2008.

• Z. Li, S. Papson, and R.M. Narayanan, “Data Level Fusion of Multi-look Inverse Synthetic Aperture Radar (ISAR) Images,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 46, No. 5, pp. 1394–1406, May 2008.

• R.M. Narayanan and J. Chuang, “Covert Communications Using Heterodyne Correlation Random Noise Signals,” Electronics Letters, Vol. 43, No. 22, pp. 1211–1212, October 25, 2007.

• Z. Li and R.M. Narayanan, “Doppler Visibility of Coherent Ultrawideband Random Noise Radar Systems,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 42, No. 3, pp. 904–916, July 2006.

• Y. Zhang and R.M. Narayanan, “Monopulse Radar Based on Spatiotemporal Correlation of Stochastic Signals,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 42, No. 1, pp. 160–173, January 2006.

• S. Kim, K. Wagner, R.M. Narayanan, and W. Zhou, “Broadband Polarization Interferometric Time-Integrating Acousto-Optic Correlator for Random Noise Radar,” Optical Engineering, Vol. 40, No. 10, Paper Number 108202 (11 pages), doi:10.1117/1.2084807, October 2005.

• S. Tan, R.M. Narayanan, and S.K. Shetty, “Polarized Lidar Reflectance Measurements of Vegetation at Near-Infrared and Green Wavelengths,” International Journal of Infrared and Millimeter Waves, Vol. 26, No. 8, pp. 1175–1194, August 2005.

• R.M. Narayanan and C. Kumru, “Implementation of Fully Polarimetric Random Noise Radar,” IEEE Antennas and Wireless Propagation Letters, Vol. 4, pp. 125–128, 2005.

• X. Xu and R.M. Narayanan, “Enhanced Resolution in SAR/ISAR Imaging Using Iterative Sidelobe Apodization,” IEEE Transactions on Image Processing, Vol. 14, No. 4, pp. 537–547, April 2005.

• Y. Huang, R.M. Narayanan, and G.R. Kadambi, “Equivalent Circuit for Antenna-Cavity Coupling in Wheeler's Cap Technique,” Electromagnetics, Vol. 25, No. 2, pp. 115–131, February-March 2005.

• R.M. Narayanan, R.N. Machavaram, D. Li, and S.E.G. Elias, “Analysis of Track Modulus Estimation Models Using Ground Penetrating Radar (GPR) Data,” Rail International, Vol. 35, No. 8, pp. 22–30, October-December 2004.

• R.M. Narayanan, W. Zhou, K.H. Wagner, and S. Kim, “Acousto-Optic Correlation Processing in Random Noise Radar,” IEEE Geoscience and Remote Sensing Letters, Vol. 1, No. 3, pp. 166–170, July 2004.

• R.M. Narayanan, K. Atanassov, V. Stoiljkovic, and G.R. Kadambi, “Polarization Diversity Measurements and Analysis for Antenna Configurations at 1800 MHz,” IEEE Transactions on Antennas and Propagation, Vol. 52, No. 7, pp. 1795–1810, July 2004.

• G. Pan and R.M. Narayanan, “Electromagnetic Scattering from a Dielectric Sheet Using the Method of Moments with Approximate Boundary Condition,” Electromagnetics, Vol. 24, No. 5, pp. 369–384, July 2004. See also Corrections, Electromagnetics, Vol. 25, No. 2, pp. 169–176, February-March 2005.

• R.M. Narayanan, X. Xu, and J.A. Henning, “Radar Penetration Imaging Using Ultra Wideband (UWB) Random Noise Waveforms,” IEE Proceedings on Radar, Sonar, and Navigation, Vol. 151, No. 3, pp. 143–148, June 2004.

• Y. Zhang and R.M. Narayanan, “Design Considerations for a Real-Time Random Noise Tracking Radar,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 40, No. 2, pp. 434–445, April 2004.

• S. Tan and R.M. Narayanan, “Design and Performance of a Multiwavelength Airborne Polarimetric Lidar for Vegetation Remote Sensing,” Applied Optics, Vol. 43, No. 11, pp. 2360–2368, 10 April 2004.

• J. Li and R.M. Narayanan, “Integrated Spectral and Spatial Information Mining in Remote Sensing Imagery,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 42, No. 3, pp. 673–685, March 2004.

• R.M. Narayanan, J.W. Jakub, D. Li, and S.E.G. Elias, “Railroad Track Modulus Estimation Using Ground Penetrating Radar Measurements,” NDT&E International, Vol. 37, No. 2, pp. 141–151, March 2004.

• Y. Huang, R.M. Narayanan, and G.R. Kadambi, “Electromagnetic Coupling Effects on the Cavity Measurement of Antenna Efficiency,” IEEE Transactions on Antennas and Propagation, Vol. 51, No. 11, pp. 3064–3071, November 2003.

• J. Li and R.M. Narayanan, “A Shape-Based Approach to Change Detection of Lakes Using Time Series Remote Sensing Images,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 41, No. 11, pp. 2466–2477, November 2003.

• M. Dawood and R.M. Narayanan, “Generalised Wideband Ambiguity Function of a Coherent Ultrawideband Random Noise Radar,” IEE Proceedings on Radar, Sonar, and Navigation, Vol. 150, No. 5, pp. 379–386, October 2003.

• R.M. Narayanan, S.K. Ponnappan, and S.E. Reichenbach, “Effects of Noise on the Information Content of Remote Sensing Images,” Geocarto International, Vol. 18, No. 2, pp. 15–26, June 2003.

• R.M. Narayanan, “Academic Leadership Strategies for Engineering Faculty,” International Journal of Engineering Education, Vol. 19, No. 2, pp. 241–251, 2003.

• B.R. Corner, R.M. Narayanan, and S.E. Reichenbach, “Noise Estimation in Remote Sensing Imagery Using Data Masking,” International Journal of Remote Sensing, Vol. 24, No. 4, pp. 689–702, 20 February 2003.

• R.M. Narayanan, S.G. Hudson, C.J. Kumke, M.W. Beacham, and D.D. Hall, “Nebraska DOR Tests GPR to Find Bridge Corrosion,” Better Roads, Vol. 73, No. 2, pp. 70–73, February 2003.

• D.S. Garmatyuk and R.M. Narayanan, “Ultra-Wideband Continuous-Wave Random Noise Arc-SAR,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 40, No. 12, pp. 2543–2552, December 2002.

• R.M. Narayanan, “Overview of a Course on Electronic Instrumentation Design for Senior Undergraduate and Graduate Students,” IEEE Transactions on Education, Vol. 45, No. 4, pp. 344–349, November 2002.

• D.S. Garmatyuk and R.M. Narayanan, “ECCM Capabilities of an Ultra-wideband Bandlimited Random Noise Imaging Radar,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 38, No. 4, pp. 1243–1255, October 2002.

• R.M. Narayanan, E. Borissov, J.L. Sullivan, and J.B. Winter, “A Test Facility for Efficiency Characterization of Electrically Small Antennas,” Electromagnetics, Vol. 22, No. 7, pp. 513–534, October 2002.

• R.M. Narayanan and J. Zhang, “Land Cover Classification Models Using Shuttle Imaging Radar (SIR-C) Data: A Case Study in New Hampshire, U.S.A.,” Geocarto International, Vol. 17, No. 3, pp. 57–65, September 2002.

• M. Dawood and R.M. Narayanan, “Multipath and Ground Clutter Analysis for a UWB Noise Radar,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 38, No. 3, pp. 838–853, July 2002.

• S.E. Reichenbach, L. Cao, and R.M. Narayanan, “Information Efficiency in Hyperspectral Imaging Systems,” Journal of Electronic Imaging, Vol. 11, No. 3, pp. 347–353, July 2002.

• H.S. Kim and R.M. Narayanan, “A New Measurement Technique for Obtaining the Complex Relative Permittivity of Terrain Surfaces,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 40, No. 5, pp. 1190–1194, May 2002.

• O. Yildirim and R.M. Narayanan, “Diffraction of Obliquely Incident Plane Waves by Resistive and Conductive Planar Surfaces,” Archiv für Elektronik und Ubertragungstechnik, Vol. 56, No. 3, pp. 145–151, March 2002.

• R.M. Narayanan, M.K. Desetty, and S.E. Reichenbach, “Effect of Spatial Resolution on Information Content Characterisation in Remote Sensing Imagery Based on Classification Accuracy,” International Journal of Remote Sensing, Vol. 23, No. 3, pp. 537–553, 20 February 2002.

• X. Xu and R.M. Narayanan, “Range Sidelobe Suppression Technique for Coherent Ultra Wide-band Random Noise Radar Imaging,” IEEE Transactions on Antennas and Propagation, Vol. 49, No. 12, pp. 1836–1842, December 2001.

• D.C. Bell and R.M. Narayanan, “ISAR Imaging Using a Coherent Ultrawideband Random Noise Radar System,” Optical Engineering, Vol. 40, No. 11, pp. 2612–2623, November 2001.

• X. Xu and R.M. Narayanan, “FOPEN SAR Imaging Using Ultrawideband Step-Frequency and Random Noise Waveforms: A Comparative Study,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 37, No. 4, pp. 1287–1300, October 2001.

• X. Xu and R.M. Narayanan, “Three-Dimensional Interferometric ISAR Imaging for Target Scattering Diagnosis and Modeling,” IEEE Transactions on Image Processing, Vol. 10, No. 7, pp. 1094–1102, July 2001.

• D.C. Rundquist, S. Narumalani, and R.M. Narayanan, “A Review of Wetlands Remote Sensing and Defining New Considerations,” Remote Sensing Reviews, Vol. 20, No. 3, pp. 207–226, 2001.

• M. Dawood and R.M. Narayanan, “Receiver Operating Characteristics for the Coherent Ultrawideband Random Noise Radar,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 37, No. 2, pp. 586–594, April 2001.

• R.M. Narayanan and P.P. Hirsave, “Soil Moisture Estimation Models Using SIR-C Data: A Case Study in New Hampshire, USA,” Remote Sensing of Environment, Vol. 75, No. 3, pp. 385–396, March 2001.

• Y. Xu, R.M. Narayanan, X. Xu, and J.O. Curtis, “Polarimetric Processing of Coherent Random Noise Radar Data for Buried Object Detection,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 39, No. 3, pp. 467–478, March 2001.

• D.C. Bell and R.M. Narayanan, “Theoretical Aspects of Radar Imaging Using Stochastic Waveforms,” IEEE Transactions on Signal Processing, Vol. 49, No. 2, pp. 394–400, February 2001.

• R.M. Narayanan, C.J. Kumke, and D. Li, “Railroad Track Substructure Monitoring Using Ground Penetrating Radar (GPR),” Rail International, Vol. 32, No. 1, pp. 28–34, January 2001.

• R.M. Narayanan, R.T. Becker, and M.B. Bashforth, “Detection of Buried Pipes Using Polarimetric Stepped Frequency Ground Penetrating Radar (GPR) Images,” Pipes and Pipelines International, Vol. 45, No. 6, pp. 15–31 & p. 40, December 2000.

• R.M. Narayanan, T.S. Sankaravadivelu, and S.E. Reichenbach, “Dependence of Image Information Content on Gray-Scale Resolution,” Geocarto International, Vol. 15, No. 4, pp. 15–27, December 2000.

• R.M. Narayanan and M. Hegde, “Soil Moisture Estimation Using Combined ERS, JERS, and ALMAZ SAR Data: A Comparison Between Two Inversion Models Using Simulation,” Geocarto International, Vol. 15, No. 3, pp. 63–73, September 2000.

• R.M. Narayanan and M. Dawood, “Doppler Estimation Using a Coherent Ultra-Wideband Random Noise Radar,” IEEE Transactions on Antennas and Propagation, Vol. 48, No. 6, pp. 868–878, June 2000.

• R.M. Narayanan and K.T. Vu, “Microwave Measurement of Moisture Content in Powdered Foods,” Journal of Food Processing and Preservation, Vol. 24, No. 1, pp. 39–56, March 2000.

• R.M. Narayanan and M.T. Pflum, “Remote Sensing of Vegetation Stress and Soil Contamination Using CO₂ Laser Reflectance Ratios,” International Journal of Infrared and Millimeter Waves, Vol. 20, No. 8, pp. 1593–1617, August 1999.

• R.M. Narayanan, “Use of Objective Based Undergraduate Research Project Experience as a Graduate Student Recruitment Tool,” Journal of Engineering Education, Vol. 88, No. 3, pp. 361–365, July 1999.

• R.M. Narayanan, J.R. Horner, and K.M. St. Germain, “Simulation Study of a Robust Algorithm for Soil Moisture and Surface Roughness Estimation Using L-Band Radar Backscatter,” Geocarto International, Vol. 14, No. 1, pp. 5–12, March 1999.

• O. Yildirim and R.M. Narayanan, “Multiple Diffraction of a Line Source Field by a Three Part Resistive Plane,” Archiv für Elektronik und Ubertragungstechnik, Vol. 53, No. 1, pp. 3–10, January 1999.

• J.O. Curtis and R.M. Narayanan, “Effects of Laboratory Procedures on Soil Electrical Property Measurements,” IEEE Transactions on Instrumentation and Measurement, Vol. 47, No. 6, pp. 1474–1480, December 1998.

• R.M. Narayanan, Y. Xu, P.D. Hoffmeyer, and J.O. Curtis, “Design, Performance, and Applications of a Coherent Ultrawideband Random Noise Radar,” Optical Engineering, Vol. 37, No. 6, pp. 1855–1869, June 1998.

• R.M. Narayanan and B.D. Guenther, “Effects of Emergent Grass on Mid-Infrared Laser Reflectance of Soil,” Photogrammetric Engineering and Remote Sensing, Vol. 64, No. 5, pp. 407–413, May 1998.

• R.M. Narayanan and J. Meng, “Second Order Absorbing Boundary Conditions for TLM Analysis of Open Region Scattering Problems,” International Journal of Infrared and Millimeter Waves, Vol. 19, No. 4, pp. 651–671, April 1998.

• R.M. Narayanan and B.R.J. Snuttjer, “Millimeter-Wave Backscatter Measurements in Support of Surface Navigation Applications,” International Journal of Infrared and Millimeter Waves, Vol. 18, No. 11, pp. 2077–2109, November 1997.

• R.M. Narayanan and S.R. Jackson, “Estimation of Surface Snow Properties Using Combined Millimeter-Wave Backscatter and Near-Infrared Reflectance Measurements,” International Journal of Infrared and Millimeter Waves, Vol. 18, No. 5, pp. 959–990, May 1997.

• R.D. Palmer, M.F. Larsen, P.B. Howell, J.Y.N. Cho, R.M. Narayanan, and M.C. Kelley, “A New Spatial Interferometry Capability Using the Arecibo 430 MHz Radar,” Radio Science, Vol. 32, No. 2, pp. 749–755, March–April 1997. See also Corrections, Radio Science, Vol. 33, No. 4, p. 1035, July–August 1998.

• R.M. Narayanan, D.D. Cox, J.M. Ralston, and M.R. Christian, “Millimeter-Wave Specular and Diffuse Multipath Components of Terrain,” IEEE Transactions on Antennas and Propagation, Vol. 44, No. 5, pp. 627–645, May 1996.

• R.M. Narayanan and S.E. Green, “Field Measurements of Natural and Artificial Targets Using a Mid-Infrared Laser Reflectance Sensor,” IEEE Photonics Technology Letters, Vol. 6, No. 8, pp. 1023–1026, August 1994.

• R.M. Narayanan, D.W. Doerr, and D.C. Rundquist, “Power Spectrum of Wind-Influenced Vegetation Backscatter at X-Band,” IEE Proceedings on Radar, Sonar, and Navigation, Vol. 141, No. 2, pp. 125–131, April 1994.

• R.M. Narayanan, “First Order Exponential Approximations for Small Arguments,” IEEE Aerospace and Electronic Systems Magazine, Vol. 9, No. 2, pp. 33–35, February 1994.

• R.M. Narayanan, R. Pardipuram, and D.C. Rundquist, “Statistical Characteristics of Simulated Radar Imagery from Bare Soil Surfaces: Effects of Surface Roughness and Soil Moisture Variability,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 32, No. 1, pp. 159–168, January 1994.

• R.M. Narayanan, S.E. Green, and D.R. Alexander, “Mid-Infrared Laser Reflectance of Moist Soils,” Applied Optics, Vol. 32, No. 30, pp. 6043–6052, 20 October 1993.

• R.M. Narayanan, S.E. Nelson, and J.P. Dalton, “Azimuthal Scattering Pattern of Trees at X-Band,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 29, No. 2, pp. 588–593, April 1993.

• R.M. Narayanan, L.N. Mielke, and J.P. Dalton, “Crop Residue Cover Estimation Using Radar Techniques,” Applied Engineering in Agriculture, Vol. 8, No. 6, pp. 863–869, November 1992.

• R.M. Narayanan, S.E. Green, and D.R. Alexander, “Mid-Infrared Backscatter Characteristics of Various Benchmark Soils”, IEEE Transactions on Geoscience and Remote Sensing, Vol. 30, No. 3, pp. 516–530, May 1992.

• R.M. Narayanan, D.W. Doerr, and D.C. Rundquist, “Temporal Decorrelation of X-Band Backscatter from Wind-Influenced Vegetation,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 28, No. 2, pp. 404–412, April 1992.

• R.M. Narayanan, S.E. Green, and D.R. Alexander, “Soil Classification Using Mid-Infrared Off-Normal Active Differential Reflectance Characteristics,” Photogrammetric Engineering & Remote Sensing, Vol. 58, No. 2, pp. 193–199, February 1992.

• R.M. Narayanan, J. Holt and E. Abel, “A Project-Oriented Radar Systems Course: A Novel Experiment in Cooperative Pedagogy,” International Journal of Electrical Engineering Education, Vol. 29, No. 1, pp. 42–46, January 1992.

• R.M. Narayanan and R.E. McIntosh, “Millimeter-Wave Backscatter Characteristics of Multilayered Snow Surfaces,” IEEE Transactions on Antennas and Propagation, Vol. 38, No. 5, pp. 693–703, May 1990.

• R.E. McIntosh, R.M. Narayanan, J.B. Mead, and D.H. Schaubert, “Design and Performance of a 215 GHz Pulsed Radar System,” IEEE Transactions on Microwave Theory and Techniques, Vol. 36, No. 6, pp. 994–1001, June 1988.

• R.M. Narayanan, C.C. Borel, and R.E. McIntosh, “Radar Backscatter Characteristics of Trees at 215 GHz,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 26, No. 3, pp. 217–228, May 1988.

• R.M. Narayanan, “Multioctave Double Balanced Mixers Designed Using MIC Technology,” Microwave Systems News and Communications Technology (MSN&CT), Vol. 17, No. 1, pp. 108–115, January 1987.

• C.C. Borel, R.E. McIntosh, R.M. Narayanan, and C.T. Swift, “File of Normalized Radar Cross Sections (FINRACS) – A Computer Program for Research of the Scattering of Radar Signals by Natural Surfaces,” IEEE Transactions on Geoscience and Remote Sensing, Vol. 24, No. 6, pp. 1020–1022, November 1986.

• M. C. Shastry, R. M. Narayanan, and R. Muralidhar, "Compressive Radar Imaging Using White Stochastic Waveforms," IEEE International Waveform Diversity and Design Conference, Niagara Falls, Canada, August 2010.
• Y. Kwon, R. M. Narayanan and R. Muralidhar, "A Multi-Target Detector Using Mutual Information for Noise Radar Systems," IEEE International Waveform Diversity and Design Conference, Niagara Falls, Canada, August 2010.
• S. S. Bhat, R. M. Narayanan and R. Muralidhar, "An Adaptive Multimodal Radar System with Progressive Resolution Enhancement," IEEE International Waveform Diversity and Design Conference, Niagara Falls, Canada, August 2010.
• P.H. Chen, R.M. Narayanan, C.P. Lai, and A. Davydov, “Through Wall Ranging and Imaging Using UWB Random Noise Waveform: System Design Considerations and Preliminary Results,” Digest 2009 IEEE International Symposium on Antennas and Propagation, Charleston, SC, doi: 10.1109/APS.2009.5172369, June 2009.

• H. Wang, R.M. Narayanan, and Z.O. Zhou, “Through Wall Imaging Based on Electromagnetic Modeling Using UWB Noise Waveform,” Digest 2009 IEEE International Symposium on Antennas and Propagation, Charleston, SC, doi: 10.1109/APS.2009.5171845, June 2009.

• R.M. Narayanan, Z. Li, and S. Papson, “Fusion of Multiple-Look Synthetic Aperture Radar Images at Data and Image Levels,” Proc. 5th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE-2008), Mexico City, Mexico, pp. 508–513, November 2008.

• Z. Sun, R.M. Narayanan, and C. Han, “Parameter Estimation of Heavy-Tailed Rayleigh Prior Model from Observed SAR Amplitude Images,” Proc. 5^th European Radar Conference (EuRAD), Amsterdam, Netherlands, pp. 360–363, October 2008.

• R.M. Narayanan, “Ultrawideband Radar Cross Sections of Radar Calibration Targets,” Proc. NATO Specialist Meeting on Ultra-Wideband-Radar Systems, Toulouse, France, 7 pages, October 2008.

• M.S. Huang, A. Feinberg, and R.M. Narayanan, “Multiple Targets Estimation and Tracking for ADS-B Radar System,” Proc. 27th Digital Avionics Systems Conference, St. Paul, MN, pp. 3.C.1-1–3.C.1-10, doi: 10.1109/DASC.2008.4702804, October 2008.

• Z. Sun, C. Han, and R.M. Narayanan, “Heavy-Tailed Exponential Distribution: Basic Properties and Parameter Estimation,” Proc. 11^th International Conference on Information Fusion (FUSION 2008), Cologne, Germany, pp. 897–901, June-July 2008.

• R.M. Narayanan, “Through Wall Radar Imaging Using UWB Noise Waveforms,” Proc. International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Las Vegas, NV, pp. 5185–5188, March-April 2008.

• W.-J. Chen and R.M. Narayanan. “Adaptive MIMO Radar Detection Algorithm in a Spatially Correlated Clutter Environment,” Proc. SPIE Conference on Wireless Sensing and Processing III, Orlando, FL, Vol. 6980, pp. 69800M-1–69800M-12, doi:10.1117/12.777395, March 2008.

• Q. Pan and R.M. Narayanan, “An RF Tag Communication System Model for Noise Radar,” Proc. SPIE Conference on Wireless Sensing and Processing III, Orlando, FL, Vol. 6980, pp. 698007-1–698007-12, doi:10.1117/12.777394, March 2008.

• B.D. Paul, N.B. Sinha, R.N. Bera, and R.M. Narayanan, “Three Dimensional Processing of Digital Array MIMO Radar and its Performance Analysis,” Proc. International Radar Symposium India (IRSI-07), Bangalore, India, pp. 134–138, December 2007.

• R.M. Narayanan, “Ultra Wide Band Noise Radars,” Proc. International Radar Symposium India (IRSI-07), Bangalore, India, pp. P14–P18, December 2007.

• C.P. Lai, Q. Ruan, and R.M. Narayanan, “Hilbert-Huang Transform (HHT) Analysis of Human Activities Using Through-Wall Noise Radar,” Proc. International Symposium on Signals, Systems, and Electronics (ISSSE 2007), Montréal, Canada, pp. 115–118, July-August 2007.

• Z. Li and R.M. Narayanan, “Cross-band Inverse Synthetic Aperture Radar (ISAR) Image Fusion,” Proc. International Symposium on Signals, Systems, and Electronics (ISSSE 2007), Montréal, Canada, pp. 111–114, July-August 2007.

• S.C. Surender and R.M. Narayanan, “Synchronization for Wireless Multi-Radar Covert Communication Networks,” Proc. SPIE Conference on Defense Transformation and Net-Centric Systems, Orlando, FL, Vol. 6578, pp. 65780U-1–65780U-12, doi:10.1117/12.720220, April 2007.

• S. Papson and R.M. Narayanan, “Applying Target Shadow Models for SAR ATR,” Proc. SPIE Conference on Signal Processing, Sensor Fusion, and Target Recognition XVI, Orlando, FL, Vol. 6567, pp.  65670H-1–65670H-10, doi: 10.1117/12.720223, April 2007.

• C.P. Lai, Q. Ruan, and R.M. Narayanan, “Hilbert-Huang Transform (HHT) Processing of Through-Wall Noise Radar Data for Human Activity Characterization,” Proc. IEEE Workshop on Signal Processing
  Applications for Public Security and Forensics (SAFE 2007), Washington, DC, CD-ROM Format, April 2007.

• Y. Zhang and R.M. Narayanan, “Ultra-Fast Threat Detection and Tracking Using Random-Noise Retrodirective Array and Monopulse,” Proc. 25^th Army Science Conference (ASC 2006), Orlando, FL, CD-ROM Format, November 2006.

• C.P. Lai, R.M. Narayanan, and G. Culkowksi, “Through Wall Surveillance Using Ultrawideband Random Noise Radar,” Proc. 25^th Army Science Conference (ASC 2006), Orlando, FL, CD-ROM Format, November 2006. Available from URL:
  • http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA481425&Location=U2&doc=GetTRDoc.pdf.

• S.C. Surender and R.M. Narayanan, “Covert Netted Wireless Noise Radar Sensor: OFDMA-Based Communication Architecture,” Proc. IEEE Military Communications Conference (MILCOM'06), Washington, DC, doi: 10.1109/MILCOM.2006.302491, October 2006.

• J. Chuang, M.W. DeMay, and R.M. Narayanan, “Secure Spread Spectrum Communication Using Ultrawideband Random Noise Signals," Proc. IEEE Military Communications Conference (MILCOM'06), Washington, DC, doi: 10.1109/MILCOM.2006.301984, October 2006.

• S. Papson and R.M. Narayanan, “Modeling of Target Shadows for Synthetic Aperture Radar (SAR) Image Classification,” Proc. 35^th IEEE Applied Imagery Pattern Recognition (AIPR) Workshop on Theory and Application of Model-Based Image Analysis, Washington, DC, doi: 10.1109/AIPR.2006.27, October 2006.

• Z. Li and R.M. Narayanan, “Data Level Fusion of Multilook Inverse Synthetic Aperture Radar (ISAR) Images,” Proc. 35^th IEEE Applied Imagery Pattern Recognition (AIPR) Workshop on Theory and Application of Model-Based Image Analysis, Washington, DC, doi: 10.1109/AIPR.2006.21, October 2006.

• R.M. Narayanan, “Hilbert-Huang Transform (HHT) Processing of Noise Radar Data for Identification of Human Activity Behind Walls,” Proc. DARPA Urban Propagation Workshop, San Diego, CA, CD-ROM Format, October 2006.

• R.M. Narayanan, “Enhanced Spectral Efficiency of Ultrawideband Communication Systems Using Pulse Shape and Pulse Position Modulation,” Proc. URSI General Assembly, New Delhi, India, CD-ROM Format, October 2005.

• S. Tan, R.M. Narayanan, and D.L. Helder, “Polarimetric Reflectance and Depolarization Ratio From Several Tree Species Using a Multiwavelength Polarimetric Lidar,” Proc. SPIE Conference on Polarization Science and Remote Sensing II, San Diego, CA, Vol. 5888, doi: 10.1117/12.613337, July-August 2005.

• R.M. Narayanan, “Covert Multitasked Ad-Hoc Ultrawideband Sensor Networks Using Random Noise Waveforms,” Proc. Combat Identification Systems Conference (CISC'2005), Portsmouth, VA, CD-ROM format, May 2005.

• C. Rao and R.M. Narayanan, “Spectral Efficiency Considerations in Ultrawideband (UWB) Radar and Communications,” Proc. SPIE Conference on Defense Transformation and Network-Centric Systems, Orlando, FL, Vol. 5820, pp. 224–234, March-April 2005.

• S.C. Surender and R.M. Narayanan, “Battlespace Surveillance Using Netted Wireless Random Noise Radar Systems,” Proc. SPIE Conference on Defense Transformation and Network-Centric Systems, Orlando, FL, Vol. 5820, pp. 213–223, March-April 2005.

• K.M. Mohan and R.M. Narayanan, “Covert Communications Using Random Noise Signals: Effects of Atmospheric Propagation Nulls and Ambient Noise,” Proc. SPIE Conference on Digital Wireless Communications VII and Space Communication Technologies, Orlando, FL, Vol. 5819, pp. 21–32, March-April 2005.

• J. Chuang and R.M. Narayanan, “Covert Communications Using Random Noise Signals: Overall System Simulation and Modulation Analysis,” Proc. SPIE Conference on Digital Wireless Communications VII and Space Communication Technologies, Orlando, FL, Vol. 5819, pp. 13–20, March-April 2005.

• S. Papson and R.M. Narayanan, “Multiple Location SAR/ISAR Image Fusion for Enhanced Characterization of Targets,” Proc. SPIE Conference on Radar Sensor Technology IX, Orlando, FL, Vol. 5788, pp. 128–139, March-April 2005.

• Z. Li and R.M. Narayanan, “Doppler Visibility of Coherent Random Noise Radar Systems,” Proc. SPIE Conference on Radar Sensor Technology IX, Orlando, FL, Vol. 5788, pp. 74–85, March-April 2005.

• C.P. Lai and R.M. Narayanan, “Through-wall Imaging and Characterization of Human Activity Using Ultrawideband (UWB) Random Noise Radar,” Proc. SPIE Conference on Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IV, Orlando, FL, Vol. 5778, pp. 186–195, March-April 2005.

• S. Kim, R. Narayanan, W. Zhou, and K. Wagner, “Time-Integrating Acousto-Optic Correlator for Wideband Random Noise Radar,” Proc. SPIE Conference on Optical Information Systems II, Denver, CO, Vol. 5557, pp. 216–222, August 2004.

• X. Xu and R.M. Narayanan, “Impact of Different Correlation Receiving Techniques on the Imaging Performance of UWB Random Noise Radar,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’03), Toulouse, France, pp. 4525–4527, July 2003.

• X. Xu and R.M. Narayanan, “Enhanced Resolution in 3-D Interferometric ISAR Imaging Using an Iterative SVA Procedure,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’03), Toulouse, France, pp. 935–937, July 2003.

• R.M. Narayanan and X. Xu, “Principles and Applications of Coherent Random Noise Radar Technology,” Proc. SPIE Conference on Noise in Devices and Circuits, Santa Fe, NM, Vol. 5113, pp. 503–514, June 2003.

• R.M. Narayanan, R.N. Machavaram, D. Li, and S.E.G. Elias, “Comparison of Multivariate Linear Regression and Neural Network Algorithms for Ground Penetrating Radar (GPR) Estimation of Track Modulus,” Proc. Railway Engineering 2003 Conference, London, U.K., April-May 2003.

• R. M. Narayanan and X. Xu, “Impact of Foliage Obscuration on Synthetic Aperture Radar Images,” Proc. Random Fields Modeling and Processing in Imhomogeneous Media Workshop (RFMPIM’02), Guanajuato, Mexico, pp. 32–34, November 2002.

• R.M. Narayanan, “Theory and Applications of Ultra-Wideband Polarimetric Random Noise Radar,” Proc. First Noise Radar Technology Workshop (NRTW’02), Yalta, Ukraine, pp. 55–64, September 2002.

• X. Xu, D.C. Bell, D.S. Garmatyuk, and R.M. Narayanan, “Coherent Random Noise Radar Imaging,” Proc. First Noise Radar Technology Workshop (NRTW’02), Yalta, Ukraine, pp. 33–42, September 2002.

• R.M. Narayanan, “Random Noise Monopulse Radar System for Covert Tracking of Targets,” Proc. AIAA/MDA Technology Conference, Monterey, CA, July-August 2002.

• R.M. Narayanan, J.W. Jakub, D. Li, and S.E.G. Elias, “Railroad Track Modulus Estimation Using Ground Penetrating Radar (GPR) Measurements,” Proc. Railway Engineering 2002 Conference, London, U.K., CD-ROM format, July 2002.

• S. Tan and R. M. Narayanan, “A Multiwavelength Airborne Polarimetric Lidar for Vegetation Remote Sensing: Instrumentation and Preliminary Test Results,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’02), Toronto, Canada, pp. 2675–2677, June 2002.

• R. M. Narayanan, P.C. Cantu, and X. Xu, “An Airborne Low-Cost SAR for Remote Sensing: Hardware Design and Development,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’02), Toronto, Canada, pp. 2669–2671, June 2002.

• B. R. Corner, R.M. Narayanan, and S.E. Reichenbach, “A Unified Model for the Information Content of Remote Sensing Imagery,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’02), Toronto, Canada, pp. 1807–1809, June 2002.

• J. Li and R.M. Narayanan, “Shape-Based Change Detection and Information Mining in Remote Sensing,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’02), Toronto, Canada, pp.1035–1037, June 2002.

• G. Pan and R.M. Narayanan, “Comparison of Microwave Scattering Models for Leaf,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’02), Toronto, Canada, pp. 653–655, June 2002.

• Y. Zhang, R.M. Narayanan, and X. Xu, “Theoretical and Simulation Analysis of Random Noise Monopulse Radar,” Digest 2002 IEEE Antennas and Propagation Symposium San Antonio, TX, pp. 386–389, June 2002.

• X. Xu and R.M. Narayanan, “SAR Image Enhancement Using Noninteger Nyquist SVA Technique,” Digest 2002 IEEE Antennas and Propagation Symposium., San Antonio, TX, pp. 298–301, June 2002.

• Y. Huang, R.M. Narayanan, and G.R. Kadambi, “Antenna-Cavity Coupling Effects on Measurement of Antenna Efficiency,” Digest 2002 IEEE Antennas and Propagation Symposium, San Antonio, TX, pp. 714–717, June 2002.

• M. Dawood and R.M. Narayanan, “Specular Multipath Analysis for a Coherent Ultrawideband Random Noise Radar,” Digest 2002 IEEE Antennas and Propagation Symposium, San Antonio, TX, pp. 368–371, June 2002.

• S.E. Reichenbach and R.M. Narayanan, “Hyperspectral Information Efficiency and Pattern Classification,” Proc. SPIE Conf. on Visual Information Processing XI, Orlando, FL, Vol. 4736, pp. 83–91, April 2002.

• R.M. Narayanan, “Effect of Spatial and Gray Scale Resolutions on Satellite Imagery of Urban Areas,” Proc. Computers in Urban Planning and Urban Management (CUPUM) Conference, Honolulu, HI, CD-ROM format, July 2001.

• R.M. Narayanan, S.K. Ponnappan, and S.E. Reichenbach, “Effects of Uncorrelated and Correlated Noise on Image Information Content,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’01), Sydney, Australia, pp. 1898–1900, July 2001.

• X. Xu and R.M. Narayanan, “Imaging Performance Analysis of a FOPEN UWB Random Noise Radar,” Digest 2001 IEEE Antennas and Propagation Symposium, Boston, MA, Vol. 4, pp. 273–276, July 2001.

• Y. Huang, R.M. Narayanan, and G.R. Kadambi, “On Wheeler's Method for Efficiency Measurement of Small Antennas,” Digest 2001 IEEE Antennas and Propagation Symposium, Boston, MA, Vol. 3, pp. 346–349, July 2001.

• L. Cao, S.E. Reichenbach, and R.M. Narayanan, “Information Theoretic Assessment and Design of Hyperspectral Imaging Systems with Non-Uniform Bandwidths,” Proc. SPIE Conference on Visual Information Processing X, Orlando, FL, Vol. 4388, pp. 72–78, April 2001.

• J. Li, R.M. Narayanan, W.J. Waltman, and A.J. Peters, “Fuzzy Feature-Based Image Mining in Remote Sensing,” Proc. SPIE Conference on Data Mining and Knowledge Discovery: Theory, Tools, and Technology III, Orlando, FL, Vol. 4384, pp. 46–55, April 2001.

• S. Tan, R.M. Narayanan, and J.E. Kalshoven, “Measurements of Stokes Parameters of Materials at 1064-nm and 532-nm Wavelengths,” Proc. SPIE Conference on Laser Radar Technology and Applications VI, Orlando, FL, Vol. 4377, pp. 263–271, April 2001.

• R.M. Narayanan, “Mentoring of Tenure-Track Engineering Faculty,” Proc. 2001 Diversity in Mentoring Conference, Washington, DC, pp. 190–199, March 2001.

• X. Xu and R.M. Narayanan, “3-D Radar Cross Section Imaging Using Interferometric ISAR Technique,” Proc. Antenna Measurement Techniques Association Symposium (AMTA 2000), Philadelphia, PA, pp. 56–61, October 2000.

• D.C. Bell and R.M. Narayanan, “Radar Imaging Using Ultra-Wideband Stochastic Waveforms,” Proc. SPIE Conference on Image Reconstruction from Incomplete Data, San Diego, CA, Vol. 4123, pp. 1–12, July-August 2000.

• B.R. Corner, R.M. Narayanan, and S.E. Reichenbach, “Noise Reduction in Remote Sensing Imagery Using Perturbation Modeling and Principal Component Analysis,” Proc. SPIE Conference on Applications of Digital Image Processing XXIII, San Diego, CA, Vol. 4115, pp. 1–11, July-August 2000.

• R.M. Narayanan and K.J. Ranson, “Class Project on Airborne Radar System Design and Development for Remote Sensing Applications,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’00), Honolulu, HI, pp. 51–52, July 2000.

• R.M. Narayanan, T.S. Sankaravadivelu, and S.E. Reichenbach, “Dependence of Image Information Content on Gray-Scale Resolution,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’00), Honolulu, HI, pp. 153–155, July 2000.

• K. Atanassov, R.M. Narayanan, V. Stoiljkovic, and G. Kadambi, “Mobile Station Polarization Diversity Reception for Handheld Devices at 1800 MHz,” Digest 2000 IEEE Antennas and Propagation Symposium, Salt Lake City, UT, pp. 290–293, July 2000.

• X. Xu and R.M. Narayanan, “A Comparative Study of UWB FOPEN Radar Imaging Using Step-Frequency and Random Noise Waveforms,” Digest 2000 IEEE Antennas and Propagation Symposium, Salt Lake City, UT, pp. 1956–1959, July 2000.

• D.S. Garmatyuk and R.M. Narayanan, “SAR Imaging Using Fully Random Bandlimited Signals,” Digest 2000 IEEE Antennas and Propagation Symposium, Salt Lake City, UT, pp. 1948–1951,July 2000.

• M. Dawood and R.M. Narayanan, “Ambiguity Function for an Ultrawideband Random Noise Radar,” Digest 2000 IEEE Antennas and Propagation Symposium, Salt Lake City, UT, pp. 2142–2145, July 2000.

• R.M. Narayanan, “Military Applications of Coherent Random Noise Radar Technology,” Proc. 6^th Annual Joint Aerospace Weapon Systems, Support, Sensors and Simulation Symposium (JAWS S3), San Antonio, TX, June 2000.

• R.M. Narayanan, T.S. Sankaravadivelu, and S.E. Reichenbach, “Effect of Gray-Scale Resolution on Information Content of Remote Sensing Imagery,” Proc. SPIE Conference on Applications of Digital Image Processing XXII, Denver, CO, Vol. 3808, pp. 192–201, July 1999.

• B. R. Corner, R. M. Narayanan, and S. E. Reichenbach, “Principal Component Analysis of Multisensor Remote Sensing Imagery: Combining Additive and Multiplicative Noise,” Proc. SPIE Conference on Applications of Digital Image Processing XXII, Denver, CO, Vol. 3808, pp. 183–191, July 1999.

• R. M. Narayanan, C. J. Kumke, and D. Li, “Railroad Track Monitoring Using Ground Penetrating Radar: Simulation Study and Field Measurements,” Proc. SPIE Conference on Subsurface Sensors and Applications, Denver, CO, Vol. 3752, pp. 243–251, July 1999.

• R. M. Narayanan, R. T. Becker, and M. B. Bashforth, “Polarimetric Processing Techniques for Coherent Stepped Frequency Ground Penetrating Radar Systems: Applications Toward Detection of Buried Utilities,” Proc. SPIE Conference on Subsurface Sensors and Applications, Denver, CO, Vol. 3752, pp. 184–194, July 1999.

• D. Garmatyuk and R. M. Narayanan, “SAR Imaging Using a Coherent Ultrawideband Random Noise Radar,” Proc. SPIE Conference on Radar Processing, Technology, and Applications IV, Denver, CO, Vol. 3810, pp. 223–230, July 1999.

• D. C. Bell and R. M. Narayanan, “Polarimetric ISAR Imaging Using a Coherent Ultrawideband  Random Noise Radar,” Proc. SPIE Conference on Radar Processing, Technology, and Applications IV, Denver, CO, Vol. 3810, pp. 215–222, July 1999.

• M. Dawood and R. M. Narayanan, “Receiver Operating Characteristics (ROC) for Coherent Ultrawideband Random Noise Radar Systems,” Proc. SPIE Conference on Radar Processing, Technology, and Applications IV, Denver, CO, Vol. 3810, pp. 206–214, July 1999.

• R. M. Narayanan, “Coherent Ultrawideband Random Noise Radar Systems: Recent Developments in Doppler Estimation and SAR/ISAR Imaging,” Proc. SPIE Conference on Radar Processing, Technology, and Applications IV, Denver, CO, Vol. 3810, pp. 191–203, July 1999.

• M. Dawood and R. M. Narayanan, “Doppler Measurements Using a Coherent Ultrawideband Random Noise Radar,” Digest 1999 IEEE Antennas and Propagation Symposium, Orlando, FL, pp. 2226–2229, July 1999.

• R. M. Narayanan, E. Borissov, J. L. Sullivan, and J. B. Winter, “Low Distortion Positioning Equipment for Mobile Antenna Pattern Measurements,” Digest 1999 IEEE Antennas and Propagation Symposium, Orlando, FL, pp. 1814–1817, July 1999.

• D.C. Bell and R.M. Narayanan, “ISAR Turntable Experiments Using a Coherent Ultrawideband Random Noise Radar,” Digest 1999 IEEE Antennas and Propagation Symposium, Orlando, FL, pp. 1768–1771, July 1999.

• D. Garmatyuk and R. M. Narayanan, “Ultrawideband Noise Synthetic Aperture Radar: Theory and Experiment,” Digest 1999 IEEE Antennas and Propagation Symposium, Orlando, FL, pp. 1764–1767, July 1999.

• R.M. Narayanan, M.K. Desetty, and S.E. Reichenbach, “Information Content Characterization in Remote Sensing Imagery Based on Classification Accuracy,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS'99), Hamburg, Germany, pp. 131–133, June/July 1999.

• R.M. Narayanan, “Ground Penetrating Radar for Railroad Track Substructure Imaging,” Proc. 1999 Commuter Rail/Rapid Transit Conference, Toronto, Ontario, pp. 360–365, May 1999.

• S.E. Reichenbach, Y. Xiong, R.M. Narayanan, and L. Cao, “Information Theoretic Assessment and Design of Hyperspectral Imaging Systems,” Proc. SPIE Conference on Visual Information Processing VIII, Orlando, FL, Vol. 3716, pp. 100–104, April 1999.

• R.M. Narayanan, “High Resolution Imaging of Targets and Terrain Using Coherent Random Noise Radar,” Proc. NATO Symposium on High Resolution Radar Techniques, Granada, Spain, pp. 40.1–40.12, March 1999.

• R.M. Narayanan, R.D. Palmer and J.A. Henning, “Coherent Random Noise Technique for Covert Communications,” Proc. IEEE Military Communications Conference (MILCOM'98), Bedford, MA, Classified Session, October 1998.

• B.R. Corner, R.M. Narayanan and S.E. Reichenbach, “Application of Principal Component Analysis to Multisensor Classification,” Proc. Applied Imagery Pattern Recognition (AIPR) Workshop on Advances in Computer-Assisted Recognition, Washington, DC, pp. 202–210, October 1998.

• D.C. Bell and R.M. Narayanan, “ISAR Imaging Using Coherent Random Noise Radar Techniques,” Proc. SPIE Conference on Radar Processing, Technology and Applications III, San Diego, CA, Vol. 3462, pp. 284–295, July 1998.

• R.M. Narayanan, M. Dawood, and M.A. Falkinburg, “Design and Performance of an Active Radar Calibration Target for Ultra-Wideband Radar Cross Section Measurements,” Proc. SPIE Conference on Radar Processing, Technology, and Applications III, San Diego, CA, Vol. 3462, pp. 360–365, July 1998.

• M. Dawood, R.M. Narayanan, and D. Garmatyuk, “Simulation of the Effect of Phase Uncertainties on the Estimation of Linear Doppler Velocities Using Coherent Random Noise Radar,” Proc. SPIE Conference on Radar Processing, Technology and Applications III, San Diego, CA, Vol. 3462, pp. 73–78, July 1998.

• M.K. Desetty, R.M. Narayanan, and S.E. Reichenbach, “Characterization of Information Content in Remote Sensing Imagery,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS'98), Seattle, WA, pp. 2029–2031, July 1998.

• R.M. Narayanan, S.G. Hudson, C.J. Kumke, M.W. Beacham, and D.D. Hall, “Detection of Rebar Corrosion in Bridge Decks Using Statistical Variance of Radar Reflected Pulses,” Proc. Seventh International Conference on Ground Penetrating Radar (GPR'98), Lawrence, KS, pp. 601–605, May 1998.

• R.M. Narayanan, R.T. Becker, J.W. Brandli, T. Kelley, L. Campos, D.B. Crice and M.B. Bashforth, “Simulation of Stepped-Frequency Radar Scattering from Buried Objects in Lossy Ground Medium,” Proc. Seventh International Conference. on Ground Penetrating Radar (GPR'98), Lawrence, KS, pp. 551–555, May 1998.

• R.M. Narayanan, “Coherent Random Noise Radar Technology for Covert Surveillance of Non-Cooperative Targets,” Proc. NATO Symposium on Non-Cooperative Air Target Identification Using Radar, Mannheim, Germany, pp. 6.1–6.12, April 1998.

• R.M. Narayanan, J.A. Henning, and M. Dawood, “Enhanced Detection of Objects Obscured by Dispersive Media Using Tailored Random Noise Waveforms,” Proc. SPIE Conference on Detection and Remediation Technologies for Mines and Minelike Targets III, Orlando, FL, Vol. 3392, pp. 604–614, April 1998.

• R.M. Narayanan, M.T. Pflum and J.D. Schmeeckle, “Identification of Contaminated Soil Using C02 Laser Reflectance Ratios,” Proc. SPIE Conference on Advances in Laser Remote Sensing for Terrestrial and Hydrographic Applications, Orlando, FL, Vol. 3382, pp. 14–25, April 1998.

• R.M. Narayanan, M.K. Desetty and S.E. Reichenbach, “Textural Characterization of Imagery in Terms of Information Content,” Proc. Ground Target Modeling and Validation Conference (GTM&V'97), Houghton, MI, pp. 68–74, August 1997.

• R.M. Narayanan, M. Dawood, R.D. Mueller and R.D. Palmer, “Doppler Estimation Using a Coherent Ultrawideband Random Noise Radar,” Proc. SPIE Conference on Radar Processing, Technology, and Applications II, San Diego, CA, Vol. 3161, pp. 70–76, July-August 1997.

• R.M. Narayanan, M.T. Pflum, and M.A. Marintzer, “Remote Sensing of Vegetation Stress Using CO₂ Laser Reflectance Characteristics,” Proc. SPIE Conference on Advances in Laser Remote Sensing for Terrestrial and Oceanographic Applications, Orlando, FL, Vol. 3059, pp. 136–142, April 1997.

• D.C. Rundquist, B.C. Leavitt, S.L. Payton and R.M. Narayanan, “Using ERS-1 Data to Measure and Map Selected Conditions Related to the Production of Methane in a Wetland Environment: The Nebraska Sandhills, U.S.A.,” Proc. 3^rd ERS Symposium on Space at the Service of the Environment, Florence, Italy, pp. 197–202, March 1997.

• R.M. Narayanan, R.D. Mueller, and R.D. Palmer, “Random Noise Radar Interferometry,” Proc. SPIE Conference on Radar Processing, Technology, and Applications, Denver, CO, Vol. 2845, pp. 75–82, August 1996.

• J. Zhang, R.M. Narayanan, B.T. Tracy, B.L. Gwilliam, R.L. Bolus, T. Pangburn and H.L. McKim, “Multisensor Estimation of Vegetation Characteristics,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 2375–2376, May 1996.

• P.D. Hoffmeyer, Y. Xu, R.M. Narayanan and J.O. Curtis, “Backscatter Characteristics of Buried Targets Measured Using an Ultrawideband Polarimetric Random Noise Radar,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 2282–2284, May 1996.

• S.R. Jackson and R.M. Narayanan, “Effects of System Errors on Combined MM/IR Neural Network Inversion of Surface Snow Properties,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 2258–2260, May 1996.

• Y. Xu, P.D. Hoffmeyer, R.M. Narayanan and J.O. Curtis, “Signal Processing Aspects of Polarimetric Random Noise Radar Data,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 2030–2032, May 1996.

• P.B. Howell, R.D. Palmer and R.M. Narayanan, “Preliminary Results from the Arecibo 430 MHz Spatial Interferometry System,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 1926–1928, May 1996.

• B.R. Corner, R.D. Palmer and R.M. Narayanan, “Frequency Domain Interferometry in the Planetary Boundary Layer: First Results,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 1920–1922, May 1996.

• P. Hirsave, R.M. Narayanan, B.T. Tracy, B.L. Gwilliam, R.L. Bolus, T. Pangburn and H.L. McKim, “Comparison of Spatial Statistics of SAR-Derived and In-Situ Soil Moisture Estimates,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 1073–1075, May 1996.

• R.M. Narayanan, K.K. Warner, and R.F. Diffendal, “Estimation of Abundances in Two-Component Mineral Mixtures Using Mid-Infrared Laser Reflectance Ratios,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 1017–1019, May 1996.

• B.R.J. Snuttjer and R.M. Narayanan, “Millimeter-Wave Backscatter Measurements in Support of Surface Navigation Applications,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 506–508, May 1996.

• B.D. Guenther and R.M. Narayanan, “Vegetation Obscuration Effects on Mid-Infrared Laser Reflectance of Soil,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’96), Lincoln, NE, pp. 445–447, May 1996.

• R.M. Narayanan, Y. Xu, P.D. Hoffmeyer and J.O. Curtis, “Random Noise Polarimetry Applications to Subsurface Probing,” Proc. SPIE Conference on Detection and Remediation Technologies for Mines and Minelike Targets, Orlando, FL, Vol. 2765, pp. 360–370, April 1996.

• R.D. Palmer, B.R. Corner and R.M. Narayanan, “Frequency Domain Interferometry in the Planetary Boundary Layer: First Results,” Proc. 7th International Workshop on Technical and Scientific Aspects of MST Radar, Hilton Head, SC, November 1995.

• R.M. Narayanan and M.S. Hegde, “Soil Moisture Inversion Algorithms Using ERS-1, JERS-1, and ALMAZ SAR Data,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’95), Florence, Italy, pp. 504–506, July 1995.

• R.M. Narayanan, S.R. Jackson and K.M. St. Germain, “Estimation of Surface Snow Properties Using Combined Near-Infrared Reflectance and Millimeter-Wave Backscatter,” Proc. Combined Optical-Microwave Earth Atmosphere Sensing Symp. (CO-MEAS'95), Atlanta, GA, pp. 189–191, April 1995.

• K.M. St. Germain, V.L. Moseley and R.M. Narayanan, “Active and Passive Microwave Remote Sensing to Identify Wetland Regions: Data and Simulations,” Proc. National Interagency Workshop on Wetlands: Technology Advances for Wetland Science, New Orleans, LA, pp. 79–80, April 1995.

• R.M. Narayanan, Y. Xu, P.D. Hoffmeyer and J.O. Curtis, “Design and Performance of a Polarimetric Random Noise Radar for Detection of Shallow Buried Targets,” Proc. SPIE Conference on Detection Technologies for Mines and Minelike Targets, Orlando, FL, Vol. 2496, pp. 20–30, April 1995.

• R.M. Narayanan, Y. Xu and D.W. Rhoades, “Simulation of a Polarimetric Random Noise Spread Spectrum Radar for Subsurface Probing Applications,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS'94), Pasadena, CA, pp. 2494–2498, August 1994.

• R.M. Narayanan and S.R. Jackson, “Snow Cover Classification Using Millimeter-Wave Radar Imagery,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS'94), Pasadena, CA, pp. 1938–1941, August 1994.

• R.M. Narayanan, D.W. Rhoades, P.D. Hoffmeyer and J.O. Curtis, “Comparative Study of Dielectric Constant Measurements of Soils Using Different Techniques,” Proc. International Symposium for Spectral Sensing Research (ISSSR’94), San Diego, CA, pp. 204–215, July 1994.

• J. Meng, R.M. Narayanan and R.H. Voelker, “Second-Order Absorbing Boundary Conditions for the FD-TLM Method Analysis of Open-Region Scattering Problems,” Digest 1994 IEEE Antennas and Propagation Symposium, Seattle, WA, pp. 1136–1139, June 1994.

• R.M. Narayanan, J.R. Horner and K.M. St. Germain, “Inversion Algorithms Based on Non-Linear Model Functions for Soil Moisture and Surface Roughness Estimation from Remotely Sensed Radar Reflectances,” Digest 1994 ASPRS/ACSM Annual Convention and Exposition Technical Papers, Reno, NV, pp. 471–483, April 1994.

• R.M. Narayanan and E.A. Walter-Shea, “A Multispectral System for Contemporaneous Field Observations of Natural Surfaces,” Proc. Combined Optical-Microwave Earth Atmosphere Sensing Symposium (CO-MEAS’93), Albuquerque, NM, pp. 151–154, March 1993.

• R.M. Narayanan, S.R. Jackson and D.C. Rundquist, “Simulation of Millimeter-Wave Radar Clutter Maps of Snow Surfaces,” Proc. Southeastern Simulation Conference (SESC’92), Pensacola, FL, pp. 10–19, October 1992.

• R.M. Narayanan and K.T. Vu, “Microwave Sensing of Moisture Content in Selected Fruits and Vegetables,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’92), Houston, TX, pp. 1181–1182, May 1992.

• R.M. Narayanan, R. Pardipuram and D.C. Rundquist, "Spatial Statistical Characteristics of Radar Imagery from Bare Soil Surfaces,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’92), Houston, TX, pp. 498–500, May 1992.

• R.M. Narayanan, L.N. Mielke and T.J. Schirmer, “Mid-Infrared Laser Reflectance of Crop Leaves Subjected to Water Stress,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’92), Houston, TX, pp. 339–341, May 1992.

• R.M. Narayanan, E.D. vonRentzel1 and D.R. Alexander, “Discrimination Between Road and Soil Surfaces Using CO₂ Laser Reflectances,” Proc. SPIE Conference on Characterization, Propagation and Simulation of Sources and Backgrounds II, Orlando, FL, Vol. 1687, pp. 370–380, April 1992.

• R.M. Narayanan, L.N. Mielke and J.P. Dalton, “Radar Characteristics of Crop Residue,” Paper No. 913008, 14 p., presented at the 1991 ASAE Summer Meeting, Albuquerque, NM, June 1991.

• R.M. Narayanan, S.E. Green and D.R. Alexander, “Mid-Infrared Backscatter Spectra of Selected Agricultural Crops,” Proc. SPIE Conference on Optics in Agriculture, Boston, MA, Vol. 1379, pp. 116–122, November 1990.

• R.M. Narayanan and J.P. Costas, “A Proposed Wideband Coherent Millimeter-Wave Radar System with High Range and Doppler Resolution,” Proc. First Los Alamos Symposium on Ultra-Wideband Radar, Los Alamos, NM, March 1990 (Published by CRC Press, Boca Raton, FL, B. Noel (Ed.), pp. 519–527, 1991).

• R.M. Narayanan, P.M. Langlois, P.W. Gaiser and R.E. McIntosh, “Millimeter-Wave Backscatter Measurements of Various Snow Forms,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’88), Edinburgh, Scotland, pp. 451–452, September 1988.

• R.M. Narayanan, C.C. Borel and R.E. McIntosh, “Radar Backscatter Characteristics of Trees at 215 GHz,” Proc. IEEE International Geoscience and Remote Sensing Symposium (IGARSS’88), Edinburgh, Scotland, pp. 997–998, September 1988.

• C.C. Borel, R.E. McIntosh and R.M. Narayanan, “Description of a Databank of Normalized Radar Cross Section of Terrain,” Proc. International Symposium on Microwave Signatures in Remote Sensing, Göteborg, Sweden, pp. 84–85, January 1987.

• J. Li and R.M. Narayanan, “Integrated Information Mining and Image Retrieval in Remote Sensing,” Chapter 16 in Recent Advances in Hyperspectral Signal and Image Processing (edited by C.I. Chang), Transworld Research Network: Trivandrum, India, pp. 449–469, 2006.

• R.M. Narayanan, X. Xu, and C. Kumru, “Foliage Penetration Stripmap SAR Imaging Using UWB Random Noise Waveform,” Chapter 18 in Ultra-Wideband Short-Pulse Electromagnetics 6 (edited by E.L. Mokole, M. Kraglott, and K.R. Gerlach), Kluwer Academic/Plenum Publishers: New York, NY, pp. 215–221, 2003.

• J. Li, R.M. Narayanan, and P.Z. Revesz, “A Shape-Based Approach to Change Detection and Information Mining in Remote Sensing,” Chapter 4 in Frontiers of Remote Sensing Information Processing (edited by C.H. Chen), World Scientific: Singapore, pp. 63–86, 2003.

• D.A. Noon and R.M. Narayanan, “Subsurface Remote Sensing,” Chapter 24 in The Review of Radio Science: 1999-2002 (edited by W.R. Stone), Wiley Interscience: New York, NY, pp. 535–552, 2002.

• R.M. Narayanan, Y. Xu, P.D. Hoffmeyer, and J.O. Curtis, “Design, Performance, and Applications of a Coherent UWB Random Noise Radar,” Chapter 8 in Ultra-Wideband Radar Technology (edited by J.D. Taylor), CRC Press: Boca Raton, FL, pp. 181–203, 2001.