Dr. Benjamin C. Flores Profile

Dr. Benjamin C. Flores

Professor at Univ of Texas at El Paso

SPIE Involvement:

Author

Publications (47)

Proceedings Article | 23 April 2020 Presentation + Paper

Chaotic systems for simultaneous communications and bistatic radar

Chandra Pappu, Benjamin Flores

Proceedings Volume 11408, 114080K (2020) https://doi.org/10.1117/12.2558821

KEYWORDS: Chaos theory, Chaos, Radar, Oscillators, Receivers, Complex systems, Telecommunications, Transmitters, Frequency modulation, Target detection, Modulation

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Proceedings Article | 1 May 2017 Paper

Optimization of neural network architecture for classification of radar jamming FM signals

Alberto Soto, Ariadna Mendoza, Benjamin Flores

Proceedings Volume 10188, 101881H (2017) https://doi.org/10.1117/12.2262190

KEYWORDS: Detection and tracking algorithms, Electronic filtering, Frequency modulation, Signal to noise ratio, Neural networks, Radar, Neurons, Network architectures, Artificial neural networks, Pattern recognition, Interference (communication)

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Proceedings Article | 1 May 2017 Paper

Classification of radar jammer FM signals using a neural network

Ariadna Mendoza, Alberto Soto, Benjamin Flores

Proceedings Volume 10188, 101881G (2017) https://doi.org/10.1117/12.2262059

KEYWORDS: Frequency modulation, Fermium, Signal to noise ratio, Radar, Artificial neural networks, Bandpass filters, Neural networks, Interference (communication), MATLAB, Electronic filtering, Signal detection, Neurons, Signal generators

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Proceedings Article | 21 May 2015 Paper

Analysis of chaotic FM system synchronization for bistatic radar

Chandra Pappu, Berenice Verdin, Benjamin Flores, James Boehm, Patrick Debroux

Proceedings Volume 9461, 94610Z (2015) https://doi.org/10.1117/12.2177417

KEYWORDS: Signal to noise ratio, Fermium, Frequency modulation, Receivers, Radar, Transmitters, Oscillators, Modulation, Linear filtering, Interference (communication)

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Proceedings Article | 21 May 2015 Paper

Study of the microdoppler signature of a bicyclist for different directions of approach

Berta Rodriguez-Hervas, Michael Maile, Benjamin Flores

Proceedings Volume 9461, 94611E (2015) https://doi.org/10.1117/12.2087619

KEYWORDS: Radar, Doppler effect, Roads, Kinematics, Detection and tracking algorithms, Data modeling, Classification systems, Velocity measurements, Sensors, Imaging systems

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Proceedings Article | 29 May 2014 Paper

Comparative of signal processing techniques for micro-Doppler signature extraction with automotive radar systems

Berta Rodriguez-Hervas, Michael Maile, Benjamin Flores

Proceedings Volume 9077, 90771A (2014) https://doi.org/10.1117/12.2053323

KEYWORDS: Radar, Signal processing, Wavelets, Time-frequency analysis, Fourier transforms, Doppler effect, Chromium, Roads, Safety, Microwave radiation

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Proceedings Article | 9 May 2012 Paper

Analysis of the ambiguity function for an FM signal derived from the Lorenz chaotic flow

Chandra Pappu, Benjamin Flores, Patrick deBroux

Proceedings Volume 8361, 836114 (2012) https://doi.org/10.1117/12.920721

KEYWORDS: Fermium, Frequency modulation, Doppler effect, Radar, Complex systems, Fractal analysis, Time-frequency analysis, Control systems, Analytical research, Signal processing

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Proceedings Article | 4 May 2012 Paper

Testing a transmission line model for homogeneous subsurface media using ground penetrating radar

Berta Rodriguez-Hervas, Benjamin Flores, Chandra Pappu, Ricardo von Borries, Patrick Debroux

Proceedings Volume 8361, 836104 (2012) https://doi.org/10.1117/12.917946

KEYWORDS: Target detection, Detection and tracking algorithms, General packet radio service, Wavelets, Ground penetrating radar, Radio propagation, Signal processing, Wave propagation, Data modeling, Dielectrics

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Proceedings Article | 21 June 2011 Paper

Generation of FM signals with quasi-chirp behavior using three-dimensional chaotic flows

Benjamin Flores, Chandra Pappu, Berenice Verdin

Proceedings Volume 8021, 80210V (2011) https://doi.org/10.1117/12.884391

KEYWORDS: Fermium, Frequency modulation, Signal generators, Complex systems, Time-frequency analysis, Control systems, Nonlinear optics, Information operations, Electroluminescence, Interference (communication)

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Proceedings Article | 27 April 2010 Paper

Generation of high-range resolution radar signals using the Lorenz chaotic flow

Chandra Pappu, Benjamin Flores

Proceedings Volume 7669, 76690T (2010) https://doi.org/10.1117/12.849768

KEYWORDS: Frequency modulation, Fermium, Time-frequency analysis, Radar, Fractal analysis, Modulation, Chaos, Signal generators, Radar imaging, Image resolution

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Proceedings Article | 12 August 2009 Paper

Characterization of high resolution range and Doppler LADAR

Benjamin Flores, Berenice Verdin

Proceedings Volume 7460, 74600A (2009) https://doi.org/10.1117/12.824712

KEYWORDS: Doppler effect, LIDAR, Semiconductor lasers, Signal processing, Reflectivity, Statistical analysis, Mirrors, Photodetectors, Radar, Electromagnetism

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Proceedings Article | 8 May 2006 Paper

Statistical analysis of Bernoulli, logistic, and tent maps with applications to radar signal design

Héctor Garcés, Benjamin Flores

Proceedings Volume 6210, 62100G (2006) https://doi.org/10.1117/12.666364

KEYWORDS: Fermium, Frequency modulation, Statistical analysis, Chaos, Radar, Modulation, Electroluminescence, Synthetic aperture radar, Monte Carlo methods, Image processing

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Proceedings Article | 8 May 2006 Paper

Doppler correction for high-velocity targets using a relativistic approach

Hector Ochoa, Benjamin Flores

Proceedings Volume 6210, 62100F (2006) https://doi.org/10.1117/12.666299

KEYWORDS: Fermium, Frequency modulation, Doppler effect, Stochastic processes, Radar, Phase compensation, Receivers, Electroluminescence, Reflection, Radar sensor technology

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Proceedings Article | 8 May 2006 Paper

Modeling of FM broadcast signals with applications in bistatic radar imaging

Rebecca Sullivan, Benjamin Flores, Berenice Verdin

Proceedings Volume 6210, 621008 (2006) https://doi.org/10.1117/12.660969

KEYWORDS: Fermium, Frequency modulation, Radar, Stochastic processes, Doppler effect, Electronic filtering, Receivers, Signal detection, Target detection, Transmitters

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Proceedings Article | 8 May 2006 Paper

Wideband radar imaging using chaotic-based Gaussian frequency modulation

Berenice Verdin, Benjamin Flores

Proceedings Volume 6210, 62100E (2006) https://doi.org/10.1117/12.666300

KEYWORDS: Frequency modulation, Fermium, Doppler effect, Radar imaging, Modulation, Electroluminescence, Binary data, Phase shift keying, Image processing, Signal processing

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Proceedings Article | 16 May 2005 Paper

Generation of quasi-normal variables using discrete chaotic maps

Benjamin Flores, Berenice Verdin, Gabriel Thomas, Ali Ashtari

Proceedings Volume 5788, (2005) https://doi.org/10.1117/12.603962

KEYWORDS: Statistical analysis, Algorithms, Error analysis, Electroluminescence, Alternate lighting of surfaces, Radar, Radar sensor technology, Convolution, Visualization

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Proceedings Article | 12 August 2004 Paper

Resolution issues in the analysis of radar signals via Fourier approaches

Benjamin Flores, Hector Ochoa, Gabriel Thomas

Proceedings Volume 5410, (2004) https://doi.org/10.1117/12.537368

KEYWORDS: Radar, Doppler effect, Signal analyzers, Spectral resolution, Destructive interference, Signal processing, Electroluminescence, Optical resolution, Computer simulations, Image resolution

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Classical work in the field of high-resolution radar often assumes that an echo signal is made of a number of components that can be decomposed via Fourier analysis. Adjacent components are said to be resolved in the frequency domain if the intensity between them drops at least 3 decibels. This working definition is an extension of Lord Rayleigh's criterion for optical resolution. The problem with this approach is that whereas Rayleigh's criterion assumes signal incoherence, thus allowing for the addition of power components, a high-resolution radar signal is often the coherent sum of sinusoids, which implies voltage addition. The purpose of this paper is to discuss the consequences of using Rayleigh's criterion in the analysis of radar signals. Specifically, computer simulations using a complex signal are analyzed via the periodogram as the relative phase between the two components of the signal is allowed to change. The net effect introduced by this phase variation is to reduce or increase the spacing and intensity between two adjacent spectral peaks. These changes are due to constructive or destructive interference of spectral cross terms that cannot be ignored when attempting to resolve frequency components from one another. For instance, the simulations show that when using the averaged periodogram, the intensity in-between two adjacent components is above the -3 decibel threshold for a phase range of 1.2π radians, although the standard resolution criterion of c/2β is satisfied. Similar results are obtained when using a number of windows that are known to control sidelobe levels. Thus, the use of Rayleigh's criterion to define the resolution of a high-resolution radar system is technically inconsistent and undermines our ability to perform quantitative comparisons of target profiles, Doppler profiles and range-Doppler images. In this light, the authors promote the adoption of alternative criteria for judging resolution gains based on the norm of the signal in the (spatial) frequency domain.

Proceedings Article | 1 August 2002 Paper

Stepped-frequency ISAR motion compensation using maximum likelihood phase gradient

Jae Sok Son, Benjamin Flores

Proceedings Volume 4727, (2002) https://doi.org/10.1117/12.478679

KEYWORDS: Phase measurement, Motion estimation, Signal to noise ratio, Radar, Detection and tracking algorithms, Motion measurement, Interference (communication), Error analysis, Distortion, Synthetic aperture radar

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Proceedings Article | 1 August 2002 Paper

Chaotic signals for wideband radar imaging

Benjamin Flores, Emmanuel Solis, Gabriel Thomas

Proceedings Volume 4727, (2002) https://doi.org/10.1117/12.478670

KEYWORDS: Frequency modulation, Fermium, Chaos, Signal processing, Doppler effect, Radar imaging, Stochastic processes, Electroluminescence, Modulation, Fractal analysis

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SPIE Journal Paper | 1 March 2001

Efficient method for the translational motion compensation of inverse synthetic aperture radar imagery

Jae Sok Son, Benjamin Flores, Salim Tariq

OE, Vol. 40, Issue 03, (March 2001) https://doi.org/10.1117/12.10.1117/1.1349215

KEYWORDS: Signal to noise ratio, Motion estimation, Phase measurement, Optical engineering, Image segmentation, Detection and tracking algorithms, Synthetic aperture radar, Radar, Statistical analysis, Electronic filtering

SPIE Journal Paper | 1 February 2001

Selective inverse synthetic aperture radar imaging of moving targets

Gabriel Thomas, Benjamin Flores, Salim Tariq

OE, Vol. 40, Issue 02, (February 2001) https://doi.org/10.1117/12.10.1117/1.1339205

KEYWORDS: Synthetic aperture radar, Fourier transforms, Filtering (signal processing), Statistical analysis, Optical filters, Seaborgium, Signal to noise ratio, Optical engineering, Radar, Binary data

Proceedings Article | 13 August 1999 Paper

Radar imaging via random FM correlations

James Myers, Benjamin Flores

Proceedings Volume 3721, (1999) https://doi.org/10.1117/12.357630

KEYWORDS: Frequency modulation, Fermium, Signal processing, Modulation, Monte Carlo methods, Radar imaging, Optical correlators, Point spread functions, Tomography, Linear filtering

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Proceedings Article | 13 August 1999 Paper

SAR sidelobe apodization using parametric windows

Gabriel Thomas, Jae Sok Son, Benjamin Flores

Proceedings Volume 3721, (1999) https://doi.org/10.1117/12.357625

KEYWORDS: Apodization, Synthetic aperture radar, Signal attenuation, Fourier transforms, Image filtering, RGB color model, Electroluminescence, Image processing, Image resolution, Numerical analysis

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Proceedings Article | 14 October 1998 Paper

Time-varying filters for ISAR motion compensation

Gabriel Thomas, Benjamin Flores

Proceedings Volume 3462, (1998) https://doi.org/10.1117/12.326744

KEYWORDS: Radar, Fourier transforms, Seaborgium, Image processing, Optical filters, Time-frequency analysis, Binary data, Machine vision, Computer vision technology, Image filtering

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Proceedings Article | 14 October 1998 Paper

ISAR range measurement via complex analysis and its application to motion compensation

Jae Sok Son, Benjamin Flores

Proceedings Volume 3462, (1998) https://doi.org/10.1117/12.326766

KEYWORDS: Phase measurement, Signal to noise ratio, Motion estimation, Motion analysis, Motion measurement, Interference (communication), Statistical analysis, Optical filters, Signal processing, Image quality

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Proceedings Article | 24 September 1997 Paper

Comparison of interpolation methods for ISAR imaging

Ricardo Vargas, Benjamin Flores

Proceedings Volume 3161, (1997) https://doi.org/10.1117/12.283954

KEYWORDS: Raster graphics, Reconstruction algorithms, Radar, Automatic target recognition, Image processing, Fourier transforms, Detection and tracking algorithms, Computed tomography, Computer simulations, MATLAB

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Proceedings Article | 24 September 1997 Paper

Efficient target motion compensation method for stepped-frequency ISAR signatures

Jae Sok Son, Benjamin Flores, Salim Tariq

Proceedings Volume 3161, (1997) https://doi.org/10.1117/12.283953

KEYWORDS: Motion estimation, Radar, Error analysis, Motion models, Image quality, Phase measurement, Fourier transforms, Electroluminescence, Computer engineering, Synthetic aperture radar

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Proceedings Article | 24 September 1997 Paper

Wideband spectral reconstruction via short-time modified chirp z-transform processing

Ziad Hamed, Benjamin Flores

Proceedings Volume 3161, (1997) https://doi.org/10.1117/12.283949

KEYWORDS: Image segmentation, Signal to noise ratio, Spectral resolution, Reconstruction algorithms, Fourier transforms, Convolution, Signal processing, Computer engineering, Electroluminescence, Signal analysis

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Proceedings Article | 24 September 1997 Paper

ISAR imaging of moving targets via the Gabor wavelet transform

Gabriel Thomas, Benjamin Flores, Ana Martinez

Proceedings Volume 3161, (1997) https://doi.org/10.1117/12.283948

KEYWORDS: Doppler effect, Wavelet transforms, Image processing, Electronic filtering, Fourier transforms, Distortion, Radar imaging, Wavelets, Image resolution, Signal processing

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Proceedings Article | 5 November 1996 Paper

Two-dimensional polar format algorithm for high-quality radar image formation

Maribel Unzueta, Benjamin Flores, Ricardo Vargas

Proceedings Volume 2845, (1996) https://doi.org/10.1117/12.257219

KEYWORDS: Detection and tracking algorithms, Fourier transforms, Radar, Distortion, Data centers, Missiles, Image acquisition, Raster graphics, Synthetic aperture radar, Tomography

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Proceedings Article | 5 November 1996 Paper

Fourier transform receiver processing of hopped frequency sequences for synthetic range profile generation

Roberto Vasquez, Benjamin Flores

Proceedings Volume 2845, (1996) https://doi.org/10.1117/12.257217

KEYWORDS: Frequency modulation, Doppler effect, Fourier transforms, Fermium, Receivers, Radar, Modulation, Distortion, Linear filtering, Signal to noise ratio

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Proceedings Article | 5 November 1996 Paper

Evaluation of time-frequency filtering for SAR/ISAR motion compensation via instantaneous frequency estimators

Gabriel Thomas, Ke Liu, Sergio Cabrera, Benjamin Flores

Proceedings Volume 2845, (1996) https://doi.org/10.1117/12.257218

KEYWORDS: Signal to noise ratio, Electronic filtering, Time-frequency analysis, Image filtering, Autoregressive models, Motion estimation, Filtering (signal processing), Fourier transforms, Linear filtering, Motion models

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Proceedings Article | 5 November 1996 Paper

Phase difference method for target motion compensation of stepped-frequency ISAR signatures

Jae Sok Son, Salim Tariq, Benjamin Flores

Proceedings Volume 2845, (1996) https://doi.org/10.1117/12.257220

KEYWORDS: Motion estimation, Image quality, Motion analysis, Detection and tracking algorithms, Radar, Error analysis, Reflectivity, Image processing, Phase measurement, Optimization (mathematics)

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Proceedings Article | 17 June 1996 Paper

Coherent radar imaging of overspread targets using high-resolution phase-coded and frequency-coded waveforms

Benjamin Flores, Robert Chiu, Roberto Vasquez

Proceedings Volume 2747, (1996) https://doi.org/10.1117/12.243072

KEYWORDS: Binary data, Doppler effect, Scattering, Mars, Radar imaging, Modulation, Planets, Image resolution, Radar, Phase shift keying

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Proceedings Article | 10 June 1996 Paper

Selective motion compensation in ISAR imagery using time-frequency filtering

Gabriel Thomas, Sergio Cabrera, Benjamin Flores

Proceedings Volume 2757, (1996) https://doi.org/10.1117/12.242034

KEYWORDS: Image filtering, Fourier transforms, Time-frequency analysis, Resolution enhancement technologies, Electronic filtering, Image processing, Data modeling, Motion estimation, Super resolution, Synthetic aperture radar

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Proceedings Article | 10 June 1996 Paper

Image-focus quality indicators for efficient inverse synthetic aperture radar phase correction

Benjamin Flores, Salim Tariq, Jae Sok Son

Proceedings Volume 2757, (1996) https://doi.org/10.1117/12.242024

KEYWORDS: Error analysis, Motion measurement, Motion estimation, Radar, Image quality, Synthetic aperture radar, Detection and tracking algorithms, Image processing, Signal to noise ratio, Distortion

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Proceedings Article | 18 August 1995 Paper

Motion compensation of ISAR imagery via the burst derivative measure

Benjamin Flores, Jae Sok Son, Ana Martinez

Proceedings Volume 2562, (1995) https://doi.org/10.1117/12.216949

KEYWORDS: Motion estimation, Motion measurement, Radar, Optimization (mathematics), Kinematics, Synthetic aperture radar, Image processing, Fourier transforms, Silicon, Electroluminescence

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Proceedings Article | 18 August 1995 Paper

Radial motion compensation based on adaptive profile estimation

Benjamin Flores, Ana Martinez, Chiouguey Chen

Proceedings Volume 2562, (1995) https://doi.org/10.1117/12.216955

KEYWORDS: Signal to noise ratio, Motion estimation, Fourier transforms, Reflectivity, Radar, Detection and tracking algorithms, Distortion, Autoregressive models, Image processing, Phase shifts

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Proceedings Article | 5 July 1995 Paper

Autoregressive spectral estimation with a priori object support for inverse synthetic aperture radar imagery

Elulio Rodriguez, Benjamin Flores, Sergio Cabrera

Proceedings Volume 2485, (1995) https://doi.org/10.1117/12.213085

KEYWORDS: Autoregressive models, Scattering, Reflectivity, Radar, Synthetic aperture radar, Doppler effect, Image resolution, Image processing, Signal to noise ratio, Distortion

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Proceedings Article | 14 September 1994 Paper

Suboptimum binary phase code search using a genetic algorithm

Jorge Mora, Benjamin Flores, Vladik Kreinovich

Proceedings Volume 2275, (1994) https://doi.org/10.1117/12.186713

KEYWORDS: Binary data, Genetic algorithms, Electroluminescence, Algorithm development, Optimization (mathematics), Computer engineering, Computer science, Temporal resolution, Fourier transforms, Numerical analysis

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Proceedings Article | 14 September 1994 Paper

Improving the resolution of a stepped frequency cw ground-penetrating radar

Alan Langman, Michael Inggs, Benjamin Flores

Proceedings Volume 2275, (1994) https://doi.org/10.1117/12.186729

KEYWORDS: Radar, Data modeling, Signal to noise ratio, Ground penetrating radar, Antennas, Fourier transforms, General packet radio service, Digital electronics, Computer simulations

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Proceedings Article | 29 July 1994 Paper

Advances in automatic estimation and compensation of target kinematics for improved radar imaging

Benjamin Flores, Sergio Cabrera, Ana Martinez

Proceedings Volume 2234, (1994) https://doi.org/10.1117/12.181050

KEYWORDS: Kinematics, Radar imaging, Motion estimation, Image processing

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Proceedings Article | 9 June 1994 Paper

Application of one-dimensional adaptive extrapolation to improve resolution in range-Doppler imaging

Sergio Cabrera, Benjamin Flores, Gabriel Thomas, Javier Vega-Pineda

Proceedings Volume 2230, (1994) https://doi.org/10.1117/12.177200

KEYWORDS: Image resolution, Image processing, Raster graphics, Fourier transforms, Signal to noise ratio, Image acquisition, Radar, Synthetic aperture radar, Signal processing, Electroluminescence

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Proceedings Article | 1 November 1993 Paper

Evolutionary spectral estimation based on adaptive use of weighted norms

Sergio Cabrera, Benjamin Flores, Gabriel Thomas, Javier Vega-Pineda

Proceedings Volume 2027, (1993) https://doi.org/10.1117/12.160432

KEYWORDS: Autoregressive models, Fourier transforms, Time-frequency analysis, Stars, Yield improvement, Data modeling, Statistical analysis, Electroluminescence, Signal analyzers, Reflectivity

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Proceedings Article | 15 October 1993 Paper

Choice of an entropy-like function for range-Doppler processing

Benjamin Flores, Alberto Ugarte, Vladik Kreinovich

Proceedings Volume 1960, (1993) https://doi.org/10.1117/12.160625

KEYWORDS: Signal to noise ratio, Motion estimation, Object recognition, Tolerancing, Motion measurement, Reflectivity, Image processing, Aluminum, Chlorine, Statistical analysis

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Proceedings Article | 15 October 1993 Paper

Refinement of range-Doppler imagery by feedback control

Benjamin Flores, Alberto Ugarte

Proceedings Volume 1960, (1993) https://doi.org/10.1117/12.160624

KEYWORDS: Motion estimation, Signal to noise ratio, Raster graphics, Kinematics, Object recognition, Tolerancing, Data acquisition, Feedback control, Radar, Motion measurement

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Proceedings Article | 1 February 1992 Paper

Robust method for the motion compensation of ISAR imagery

Benjamin Flores

Proceedings Volume 1607, (1992) https://doi.org/10.1117/12.57087

KEYWORDS: Image processing, Image quality, Radar, Motion estimation, Robots, Machine vision, Computer vision technology, Robot vision, Reflectivity, Motion models

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Showing 5 of 47 publications

Conference Committee Involvement (3)

Radar Sensor Technology XVII

29 April 2013 | Baltimore, Maryland, United States

Radar Sensor Technology XVI

23 April 2012 | Baltimore, Maryland, United States

Radar Sensor Technology XV

25 April 2011 | Orlando, Florida, United States

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