Homer T. GHAFFARI, PE
**** *. ****** ** ***** Valera
Tucson, AZ 85718
805-***-**** (CP)
*********@*****.***
SUMMARY
System Professional Engineer with Leadership Experience in Design and Agile
Development, Analysis and Simulation, Implementation and Verification of
the Multidisciplinary Technologies.
PROFESSIONAL EXPERIENCE
CONSULTANT: Professional System Engineer
2009-Present
Developed Signal Detection, Estimation, Tracking, Control, and Neural
Network Navigation using Multithread C/C++ /C# .NET, under Linux, Win
/Phone 7, or Eclipse IDE, for ARM and PIC Embedded WCDMA LTE 700 and UMTS
850 MHz 4G Radio, RFID Transceivers, Active/Passive Amplifiers and
Generators, in Interfering Systems.
BOEING: Senior Principal System Engineer
2006-2009
Commercial & IDS Airplane Systems, Everett, WA, Wichita, KS and El Segundo,
CA. (2008-2009)
Analyzed and Simulated the Electromagnetic Effects to the Engine Wingtip
due to Atmospheric Lightening, using the Finite-Difference Method in
EMITS, and 3D modeling and Meshing in CATIA, ENOVIA, and PATRAN.
Coordinated Engineering Change designs for Upgrading and Refurbishing of
Commercial Airplanes.
Analyzed and evaluated the data obtained from the testing, in Flight and
Simulation modes, of the Wide Aerial Refueling Pod (WARP) and Hose Drogue
Unit (HDU) and Controller (HDC) to integrate and design the Refueling
Tanker System using the Cockpit Switching and Boom Controller System.
Further, applied Robust Control Theory Simulations using SIMULINK, to
obtain Optimal Operation of the Fuel Slosh and Control of Fluttering in
Tankers.
Network and Satellite Systems, El Segundo, CA (2006-2007)
Analyzed, Designed, and Simulated the Signal Processing of the C/A, P(Y),
M, L1Cp, and L1Cd PN codes for the Satellite's Global Positioning System
(GPS) data transmission, using MATLAB, in Linear and Interplex of Gain or
Probability Weighted Combining, and Reception in Coherent or Noncoherent
modes. Evaluated the Solid State Power Amplifier (SSPA) and the Traveling
Wave Tube Amplifiers (TWTA) in the Simulations and Experiment.
Evaluated and Simulated the Power Law, Quantization and Dither Noise using
Mathematical Models in MATLAB to assess the Clock's Crystal Oscillator
Phase Offset and Hadamard Deviations of the GPS Timing.
RAYTHEON: Principal System Engineer
2004-2006
Space and Airborne Systems, El Segundo, CA.
Designed and developed Digital Signal Processing (DSP) Algorithms, using C
under TI DSP TMS320C6000 Macros and Priority-Sequencing Operating System,
for Signal Reacquisition in GPS Receivers using C/A, P(Y), and M Pseudo
Random (PN) Codes in Inertia Navigation System (INS) Aiding or under
Jamming conditions.
Implemented the Kalman and Adaptive Filters as the Phase/Amplitude and
Position/Velocity/Time (PVT) Estimation Methods with 6 Degree of Freedom
(DOF), including the Roll, Pitch, and Yaw Attitude Control of the
Spacecraft, for GPS Receiver as the Client and the Satellites as the Server
in a Spread Spectrum Environment.
Developed and Evaluated the Sensor and Power Design of Unmanned
Aeronautical Vehicle (UAV) system.
Improved the design of the GPS Receiver Oscillators by developing
Simulations in MATLAB, Data Debugger, and Monte Carlo scheme, in Multi-
Thread Visual C++.NET Templates, to analyze the thermal cycling impacts.
ASIP: Senior Design Engineer
2002-2003
Electro-Absorption Modulated Laser (EML) & Wave-Guided PIN (WGPIN),
Somerset, NJ.
Directed, designed, and automated the RF and Luminescence-Current-Voltage
(LIV) reliability determination of the EML and WGPIN developing the
Analytical and Statistical Methods in Visual Basic & Application (VB&VBA)
.NET, GUI, and the related EXCEL Macros to obtain the Threshold, Slope,
Current Leakage, Extinction Ratio, Activation Energy, Acceleration Factors,
and Mean Time to Failure (MTTF) for the Expected Lifetime.
AGILITY COMMUNICATIONS: Senior Device Engineer
2001
Tunable Laser Fabrication, Santa Barbara, CA.
Improved the stability of Tunable Lasers by developing analytical software
in VB, GUI, EXCEL Macros, and XML for Evaluation of Front and Rear Mirror,
Gain, and Phase (Tuning) at Thermal and Current Aging Intervals.
BELL LABORATORIES: Member of Technical Staff
1984-2001
Optoelectronics Development, Murray Hill, NJ (1999-2001)
Optimized the design of the Avalanche Photo Diode (APD) and PIN photo
detectors by developing algorithms in Multi-Thread Visual C++ using MFC
Templates, for Distributed Automatic Wafer and Diffusion Probing System.
Improved the design of RF Bandwidth of 2.5 and 10 GHz APD by measuring its
DC and RF characteristics, using S parameters, and implementing statistical
data analysis and simulations using MEDICI and FDM in C++.
Wireless Hardware Development, Whippany, NJ (1994-1999)
Designed the Global System Mobile (GSM) Speech Trans-coding, Time
Alignment, and Frame Synchronization to M or A interface of the Speech
Transcoder Unit by developing codes to send Uplink (Client) and Downlink
(Server) test vectors. Results were validated with Vocoder Transmission
Templates in C.
Designed and developed the AT&T DSP 1620 code for Time Alignment of GSM and
3G applications.
Obtained the Community European (CE) Marking by evaluating, designing and
EESOF Simulation of the Power Distribution, Electro-Magnetic Compatibility
(EMC), and Testing of the Speech Transcoder Frame.
Homer Ghaffari Page
2
Optimized Slow and Fast Frequency Hopping (FH) Spread Spectrum (SS) and
Kalman-Bucy Filter (KBF) Maximum Likelihood Estimation (MLE) in MATLAB and
SIMULINK with Random Monte-Carlo (MC) input signals.
Developed the design and integration of the Time Division Multiple Access
(TDMA) Base Station Hardware including Cavity Combiners, Enhanced Digital
Radio Unit (EDRU), DRU, and TDMA Transmit Unit boards, Cellular Series II
Classic, M, MM, and Personal Communication System (PCS), Code Division
Multiple Access (CDMA) frames by implementation of proper Filtering,
Amplification, Quadrature-Phase Shift Keying (QPSK) modulation, Walsh
Coding, Convolutional Encoding, Viterbi Decoding and Maximum Likelihood
Detections.
Optical Physics Research, Murray Hill, NJ (1992-1994)
Optimized thermal characteristics of laser diodes to avoid overheating in
Continuous Wave (CW) operation at room temperature by developing Finite-
Element Models (FEM) Simulations in ANSYS. Provided guidelines for future
fabrication of these polymer and semiconductor lasers.
Device modeled the spontaneous and stimulated emission in Whispering
Gallery Mode lasers to identify their absorption and gain factors by
developing device-simulation codes. Several numerical methods for the
solution of nonlinear set of rate equations of this III-V compound,
including the Newton-Raphson and Least Square Methods, were developed in
C++ under UNIX/LINUX and results were confirmed by experiment.
Automated collection of data, Image Processing, and Filtering of several
optical instrumentations by developing Functions, Classification,
Filtering, GUI, and Network Socket Interface Libraries in C and LABVIEW.
Improved the reliability of the AT&T Smart Cards (RFID) by tenfold with
applying numerical parametric studies in FEM for analysis of mechanical and
thermal stresses on devices.
Lightwave Electro-Optical Design, Whippany, NJ (1989-1992)
Designed and automated an Isothermal-Aging System, which maintained
constant heating and cooling temperature and acquired DC and RF
measurements from 50 optical receivers at designated times. Evaluated the
expected lifetime, degradation, failure density, cumulative failure,
survivor functions and hazard rates of the aging devices, and displayed
statistical distributions by applying S functions.
Investigated nonlinear vibratory effect, chaotic motion, and instability on
semiconductor devices, by implementing the Runge-Kutta integration method,
Fourier Transform, and Markovian techniques using C++.
Led the Design, Fabrication, Testing, Reliability, and Transfer of
Technology to Manufacturing of an Underwater Lightwave System Optical
Receiver. Further, implemented its Qualification in accordance to the MIL-
Std 883, and TelCordia Specifications.
Advanced VLSI Packaging (AVP) Design and Development, Murray Hill, NJ (1985-
1989)
Characterized several semiconductor packages showing temperature profiles,
thermal stresses, and heat fluxes using Finite Element Methods of ANSYS and
NASTRAN.
Analyzed semiconductors using Finite-Difference, Finite-Volume, and
Boundary-Element schemes in C.
Improved the cooling of AVP semiconductor packages by various methods of
forced air, liquid immersion, and cryogenics with instrumentation and
automation in HP Basic for characterization of their performance.
Optimized the design of Integrated-Photonics Transceiver circuits by
establishing automatic testing using several optical instrumentations,
IEEE488 board, PC, and developing Software in C and Shell programming.
Implemented robotic assembly of VLSI packages by coding in Automated-
Control Language (ACL).
Designed the wire-bonding technique on packages by statistical analysis and
provided comparative mean, variance, regression, and confidence levels by
coding modular programs and GUI in C under UNIX.
Verified design of packages by developing the Graphic Editor in C for a
Computer Aided Design System.
Computer-Aided Design and Image-Processing Systems, Murray Hill, NJ (1984-
1985)
Supplemented the Checksum routine to an existing I/O processor by coding in
C Structured Programming.
Increased speed by factor of 4, and reduced data storage in Solid State
Drives (SSD) by factor of 2, in the GRED package, by coding parsers and I/O
routines in Compressed-Binary Format in C under UNIX.
Designed and implemented database in Intelligent-Database Machine (IDM),
using Intelligent-Database Language (IDL), embedded SQL queries embedded in
C, and Freeform screens for Image Recognition related to demographical
data. Further, utilized the IDL preprocessor, by coding programs to design
and manage database.
Installed IDM device drivers on VAX using UNIX internals and applying
configuration methods.
Developed CAD programs in C using the core and GSX graphic extension.
EDUCATION
M.S., Computer Science: Communication Systems, STEVENS Institute of
Technology, Hoboken, NJ.
M.S., Engineering Science: Multidisciplinary, University of ILLINOIS,
Urbana, IL.
M.S., Aerospace and Mechanical Engineering: Thermal Sciences, University of
MISSOURI, Columbia, MO.
B.S., Mechanical Engineering: Power Systems, University of KANSAS,
Lawrence, KS.
SKILLS and RECOGNITIONS
PLATFORMS UNIX/LINUX, Android, VxWorks, ARM, Window, Visual Studio, NET,
ASP, CMMI, and LabWindow
LANGUAGES C, C++, Java, C#, Obj C, VB, FORTRAN, WPF, WCF, SQL, Script,
MSMQ, XML, PHP, and VHDL
PACKAGES MATLAB, Simulink, SPW, EESOF, Spice, LABVIEW, Python, MEDICI,
ANSYS, PATRAN, Nastran, ENOVIA, CATIA, IVT, EMITS, HFSS, Mathcad,
Mathematica, Template, S, CAD, IDL, UML, DOORS and EXCEL
AWARDS Several Quality Recognitions, Individual Performance Awards,
Honoraries, and Scholarships
MEMBERSHIP Institute of Electrical and Electronics Engineers and
Association for Computing Machinery PUBLICATIONS Published over twenty
Technical Reports, Presentations, and Papers in technical journals
PROFESSIONAL LICENSE Registered Professional Engineer (PE), held US Secret
Security Clearance