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Senior Research Engineer, Signal Processing Resume Example

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SENIOR RESEARCH ENGINEER, SIGNAL PROCESSING
PROFESSIONAL SUMMARY
  • Strong background in Digital Signal Processing (DSP), Wireless Communications, and Statistical Signal Processing, with significant experience in the development of signal processing and optimization algorithms for communications systems design, digital/adaptive filter design, Carrier Frequency Offset correction in MIMO-OFDM systems, fading channel equalization, interference and noise suppression, symbol timing, carrier frequency and frame synchronization, I/Q mismatch compensation, adaptive beamforming, receiver performance estimation, signal enhancement, and spectrum sensing.
  • Working knowledge of developing signal processing algorithms on TI-DSP's and dsPIC microcontrollers.
  • Publications in several international journals and IEEE conferences.
  • Co-inventor of five patents (2 issued, 3 submitted).
EXPERIENCE
Senior Research Engineer, Signal Processing10/2011 to CurrentNielsen Media ResearchTampa, FL
  • Design and development of signal processing methods for signal enhancement/noise suppression and multipath channel equalization.
  • Development of signal processing algorithms and applications for audio monitoring of radio stations using Software Defined Radio (SDR).
  • System modeling/design and development of signal processing methods for wireless source identification and localization on the Linux SDR/GNU Radio platform.
  • Implementation of audio watermarking and audio signature algorithms and optimized DSP techniques on iOS devices.
R&D Engineer11/2010 to 09/2011Cognitive Radio Institute, Tennessee Tech UniversityCookeville, TN
  • Algorithmic support for signal processing and optimization in a cognitive radio network for channel equalization, signal detection and enhancement, spectrum sensing, and compressive sensing.
  • Testing of signal processing algorithms for cognitive radio applications on the TI-DSP hardware platform.
  • Modeling and simulation of communication systems within a smart grid application.
  • Development of robust statistical signal processing and machine learning algorithms for smart grid state estimation, noise suppression, and interference cancellation.
Postdoctoral Research Associate01/2009 to 10/2010University of Central FloridaOrlando, FL
  • Research and development of digital signal processing algorithms for I/Q mismatch cancellation, equalization, and blind interference suppression for single carrier and multicarrier wireless systems.
  • Research and development of novel digital signal processing and digital control algorithms for sun tracking systems and adaptive positioning of solar panels.
  • Developing embedded wireless networking algorithms for smart metering and smart grid applications.
  • Developing code for microcontroller based embedded applications.
System Design Engineer Intern06/2008 to 10/2008Infineon TechnologiesAllentown, PA
  • System Modeling/Integration and Simulation of OFDM and QPSK transceivers for Satellite Digital Radio.
  • Designed, optimized, and implemented digital signal processing algorithms and software in floating/fixed-point for digital filtering, symbol timing, frame, and carrier synchronization in C & MATLAB, on Windows and UNIX platforms.
DSP Engineer Intern05/2007 to 05/2008Locus Location SystemsMelbourne, FL
  • Studied and analyzed the effects of channel impairments such as multipath and interference on the accuracy of Time of Arrival (TOA) systems.
  • Conducted research on various adaptive and statistical signal processing techniques for channel equalization, adjacent channel and co-channel interference detection and suppression.
  • Developed an interference detection scheme using statistical signal processing techniques.
Research Assistant08/2003 to 05/2008University of Central FloridaOrlando, FL
  • Blind Interference Suppression and channel equalization algorithms in Diversity Wireless Receivers using Complex Adaptive Independent Component Analysis (ICA).
  • Development of Complex Least Mean Square (LMS) algorithms with optimal time-varying convergence factors for adaptive beamforming and array signal processing.
  • Carrier Frequency Offset Compensation and Multi­User detection techniques for MIMO­-OFDM systems.
EDUCATION
Ph.D.: Electrical Engineering2008University of Central FloridaOrlando, FL

Specialization: Digital and Statistical Signal Processing with applications in Wireless Communications.

December, 2008.

GPA: 3.91

Master of Science: Electrical Engineering2004University of Central FloridaOrlando, FL

Specialization: Digital Signal Processing and Communications.

August, 2004

GPA: 3.93

HONORS AND AWARDS
  • Graduate Provost Fellowship, 2003-2004
  • Electrical Engineering Departmental Fellowship, 2003-2004
  • Graduate Research Fellowship, 2005
PATENTS

Adaptive Methods Employing Optimal Convergence Factors For Processing Complex Signals and Systems 

United States Patent: 8,144,759 Issued: March 27, 2012

Inventors: Wasfy B Mikhael, Raghuram Ranganathan


Iterative Adaptive Solar Tracking Having Variable Step Size 

United States Patent: 8,338,695 Issued: December 25, 2012

Inventors: Wasfy B Mikhael, Raghuram Ranganathan, Nasser Kutkut, Issa Batarseh


Methods And Apparatus To Update A Reference Database 

United States Patent Application 13/839,722 Submitted: March 15th, 2013

Inventors: Venugopal Srinivasan, Raghuram Ranganathan, Alexander Topchy


Signature Retrieval And Matching For Media Monitoring 

United States Patent Application 61/976,168 Submitted: April 7th, 2014 

Inventors: Dan Nelson, Raghuram Ranganathan, Ken McArthur, Venugopal Srinivasan, Arun Ramaswamy


Variable Query Rate Signature Transmission And Matching 

Patent disclosure submitted on May 15th, 2013

Inventors: Raghuram Ranganathan, Venugopal Srinivasan

TECHNICAL SKILLS

Engineering Tools - MATLAB, SIMULINK, TI Code Composer Studio, Microchip MPLAB IDE, xIDE, MathCAD, and MultiSim

Programming Skills - ­ C, C++, C#, Python, Cygwin, MonoDevelop, XCode

Operating Systems - Windows, Linux, iOS

PUBLICATIONS

Journals:  

  • Y.Liu, R.Ranganathan, M.Hunter, and W.B.Mikhael, "Complex Adaptive LMS Employing the Conjugate Gradient Principle for Channel Estimation and Equalization", Circuits, Systems & Signal Processing, April 2011.
  • W.B. Mikhael, R. Ranganathan, and T.Yang, "Complex Adaptive ICA employing the Conjugate Gradient principle for Signal Separation in Time-Varying Flat Fading Channels", Circuits, Systems & Signal Processing, Vol. 29, 2010, pp. 469-480.
  • R.Ranganathan, T.Yang, and W.B. Mikhael, "Optimum Block Adaptive ICA for Separation of Real and Complex Signals With Known Source Distributions in Dynamic Flat Fading Environments", Journal of Circuits Systems and Computers (JCSC), Vol. 19, Issue 2, April 2010, pp. 367-379.
  • Y.Liu, R.Ranganathan, M.Hunter, and W.B.Mikhael, "Fast converging Conjugate-Gradient adaptive algorithm for complex channel estimation", IET Electronics Letters, Vol. 46, Issue 2, January 2010, pp.180-182.
  • W.B. Mikhael and R.Ranganathan, "Complex Adaptive FIR Digital Filtering Algorithm with Time-Varying Independent Convergence Factors", EURASIP Signal Processing, Volume 88, Issue 7, July 2008, pp.1889-1893.
  • R. Ranganathan and W.B. Mikhael, "A Comparative Study of Complex Gradient and Fixed-Point ICA algorithms for Interference Suppression in Static and Dynamic Channels", EURASIP Signal Processing, Vol. 88, Issue 2, February 2008, pp.399-406.
  • R. Ranganathan, T. Yang and W. B Mikhael, "Adaptive ICA for Separation of Complex Signals with Known Source Distributions in Time-Varying Channels", IET Electronics Letters, Vol. 43, Issue 15, July 2007, pp.838-839.
  • R. Ranganathan and W.B Mikhael, "Fast-converging complex adaptive algorithm for diversity wireless receivers in linearly fading channels", IEE Electronics Letters, Vol. 42, Issue 15, pp. 886­-887, July 2006.
  • R. Ranganathan and W.B Mikhael, "Mismatch Cancellation for Low-IF Wireless receivers using OBAI-ICA", WSEAS Transactions on Information Science and Applications, Vol.3, No.1, pp 204-209, January 2006.

Conferences:  

  • R. Ranganathan, T.Yang and W.B Mikhael, "ICA-based Multi-user Detection and Intercarrier Interference Cancellation in Dynamic Environments for MIMO-OFDM Systems", Invited paper: Special Session on DSP and Wireless Communication Systems, IEEE Midwest Symposium on Circuits and Systems, Seoul, Korea, August 7 - 10, 2011.
  • Y.Liu, R.Ranganathan, M.Hunter, and W.B.Mikhael, "Optimal Block Adaptive I/Q Imbalance Compensation in Wireless Quadrature Receivers", IEEE Midwest Symposium on Circuits and Systems, Seattle, Washington, August 1-4, 2010.
  • Y.Liu, M.Hunter, R.Ranganathan, and W.B.Mikhael, "Conjugate Gradient Based Complex Block LMS Employing Time-Varying Optimally Derived Stepsizes", IEEE Midwest Symposium on Circuits and Systems, Cancun, Mexico, August 25, 2009, pp. 590 - 593.
  • R.Ranganathan and W.B Mikhael, "A Novel Digital Beamforming Technique based on Homogeneous Adaptation Employing Time-varying Convergence Factors", IEEE Radio and Wireless Symposium, San Diego, California, January 18-22, 2009, pp. 558-561.
  • W.B Mikhael, and R.Ranganathan, "Complex FIR Block Adaptive digital filtering algorithm with Independent Adaptation of Real and Imaginary Filter Parameters", IEEE Midwest Symposium on Circuits and Systems, Knoxville, Tennessee, USA, August 10-13, 2008, pp. 854-857.
  • W.B Mikhael and R. Ranganathan, "Complex FIR Block Adaptive algorithm employing Optimal Time-Varying Convergence Factors", IEEE NEWCAS­-TAISA'08, Montreal, Canada, June 22-25, 2008, pp.61-64.
  • W.B Mikhael, R. Ranganathan and T.Yang, "Novel Conjugate-Gradient Based Complex Adaptive ICA for Diversity QPSK Receivers in Time-Varying Channel Applications", IEEE Radio and Wireless Symposium, Orlando, Florida, USA, Jan 22-24, 2008, pp. 527-530.
  • R. Ranganathan, T. Yang and W.B Mikhael, "Separation of Complex Signals with Known Source Distributions in Time-Varying Channels using Optimum Complex Block Adaptive ICA", IEEE Midwest Symposium on Circuits and Systems (MWSCAS '07), Montreal, Canada, August 5-8, 2007, pp. 361-364.
  • R. Ranganathan and W.B Mikhael, "A Novel Interference Suppression Technique employing Complex Adaptive ICA for Time-Varying Channels in Diversity Wireless QAM Receivers", IEEE International Symposium on Circuits and Systems (ISCAS'07), New Orleans, Louisiana, USA, May 27-30, 2007, pp.101-104.
  • R.Ranganathan, W.B Mikhael and T.Yang, "An Optimum Block Adaptive ICA Algorithm with Individual Adaptation for Wireless QAM Receivers in Dynamic Environments", IEEE Midwest Symposium on Circuits and Systems (MWSCAS '06), San Juan, Puerto Rico, August 6-9, 2006, Vol. 1, pp. 146-149.
RESEARCH PROJECTS
  • “Adaptive Filtering Techniques for Aeronautical and Space Communications”, Funded by Florida Space Grant Consortium.
  • “Adaptive Techniques for Interference Suppression and Blind Signal Separation”, Funded by Conexant Corporation
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Resume Overview

Companies Worked For:

  • Nielsen Media Research
  • Cognitive Radio Institute, Tennessee Tech University
  • University of Central Florida
  • Infineon Technologies
  • Locus Location Systems

School Attended

  • University of Central Florida

Job Titles Held:

  • Senior Research Engineer, Signal Processing
  • R&D Engineer
  • Postdoctoral Research Associate
  • System Design Engineer Intern
  • DSP Engineer Intern
  • Research Assistant

Degrees

  • Ph.D. : Electrical Engineering 2008
    Master of Science : Electrical Engineering 2004

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