Engineer Design

Resume for Dan Doberstein, BSEE/MSEE

*** ***** ***, ******, **********

PH. 805-***-**** Cell: 805-***-****

Email: ********@*****.***

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SKILLS

Wireless Networking ( >5yrs) Wireless Standards 802.11a/b/g, BlueTooth,

OFDM, DSSS, Link Budgets, Antenna Design, Interference Issues, Co-Location

Issues, Channel Power Measurements, Occupied Bandwidth, and Modulation

Measurements.

RF/Microwave ( >20yrs, DC to >10GHz) Heterodyne and Direct conversion

Receivers, Transceivers, Mixer Analysis (Images, Harmonic Distortion,

Intercept etc.), Frequency Plans, Baseband Processing, Noise Figure, RF

Gain/Loss, 2nd / 3rd Order Intercept Analysis, Phase Noise Analysis,

VCO's, Frequency Synthesis (Direct, PLL, DDS, Hybrid), Synthesizer Spurious

Analysis, Filter Design (Lumped and Distributed), RF PCB Layout,

Modulators/Demodulators (CDMA,FM, AM, BPSK, QPSK, Vector), Costas Loop,

Transmission Lines, Signal Splitters (0, 90 & 180), Circulators, Antennas,

S-Parameters, Limiters, Attenuators, Doublers, Antenna Measurements.

Digital/Analog/Control Circuits DAC's, ADC's, NCO's, Velocity Sensors,

Closed Loop Position and Velocity Motor Control Circuits,

Synchro/Resolvers, Design & Programming CPLD Logic Devices, PWM Power

Supplies, Switching Power Supplies, Battery Charging Circuits, Temperature

Measurement, RS232 Drivers, GPIB Interface Circuits, ISA Interface, USB

Interfaces.

Test Equipment Spectrum Analyzers (Expert level), Vector Network analyzers

(Highly Skilled), Scalar Network Analyzers, Noise Figure meters, Modulation

Meters, RF Power Meters, RF/ Microwave Signal Sources, Atomic Clocks

(Cesium and Rubidium), GPS Disciplined Oscillators/Clocks, Frequency

Counters, Time Interval Counters, Oscilloscopes (Analog and Digital),

VOM's, GPIB Interface and RS232 interface to Test equipment.

Analytic Signal Processing and Control Systems theory (Laplace, Fourier,

Z transforms), Modulation, Demodulation, Filter Synthesis, Special

Relativity, Signal Quantization, Stochastic Processes, Orbital Analysis of

Satellites, Principles of Radar, Optical Analysis, Fourier Optics.

GPS Receivers, GPS Simulators (Both Position and Time) In depth knowledge

from the Antenna to Computed User Position. Specialized in the application

of the GPS solution for user time (at a fixed position) as used in time

transfer. Have designed two working GPS receivers and two GPS simulators in

my pursuit of GPS knowledge. My research and experience on GPS started in

1989. Authored a 400+ page text on GPS receivers design and Theory. My

knowledge of GPS resulted from self-study. I retain that drive and

technical curiosity.

Computer Protel / Orcad /Allegro / Eagle for Schematic and PCB design,

Ansoft, PUFF, MS Word/Excel/Visio, Power Point, Corel Draw, Altera Quartus

II Digital Design.

Software C (Lots) & C++(some), Pascal, BASIC, Assembly language

(Z80/808X family), some Matlab.

Dan Doberstein, BSEE/MSEE, 750 Amber Way, Nipomo, California, PH. 805-929-

2290

Miscellaneous Mechanical Layout and design, Excellent electronic assembly

skills, the ability to troubleshoot complex test equipment down to the

component level. I collect, repair and restore top of the line test

equipment for my own use.

Technical Writing (>15yrs) Numerous technical publications covering GPS

Receivers, RF Circuits, Digital Circuits, Measurement Techniques, Marketing

Documents, Data Sheets, User Manuals, Application Notes, Tutorials and

Technical Notes. Complete publication list furnished on request.

Leadership I enjoy sharing my technical knowledge. I have done free

lectures on GPS for the IEEE at Cal Poly, USCB. My coworkers will attest

to my openness and willingness to share what I know and to assist them in

any way I can. I believe in teamwork and I understand that to lead others

takes commitment, dedication and integrity.

Sampling of Significant Projects

Lead engineer in the Timing analysis and verification testing of high

precision GPS time receivers for ITT. These receivers are part of

ground control segment of GPS. Extremely sensitive and precise these

receivers use atomic clocks (Cesium type) for their reference and can

be used to measure the clock error on the GPS satellites.

Updated the SAASM GPS receiver for ITT, PCB work with Orcad/Allegro,

produced new User Manuals and other documentation. Lab testing of

completed receiver modules.

Active in the design and debug of new GPS receiver designed to receive

the new civil signal (L2C).

Created Single Channel GPS Receiver for educational use, designed all

RF, IF, Analog and Digital Signal processing (using two Altera CPLD's

for DSP tasks) and PCB layout using Protel.

100Khz to 2.5GHz Spectrum Analyzer (PA2500), designed RF, Digital

hardware, PCB layout and software for this instrument (including user

interface).

Work Experience

Feb 2010 to Present, Consultant for IN-CON, San Luis Obispo, California

New product development, Wireless User Interfaces, PCB design for medical

Industry.

Jan 2006 to Jan 2010, GPS Receiver Consultant for ITT Thousand Oaks, Calif.

Active in the design, development and testing of specialized GPS

receivers. These receivers are used primarily in the ground support segment

of the GPS system.

1992 to Jan 2006 President DKD Instruments, Nipomo, CA 93444

Created and Designed RF Spectrum Analyzers, Synthesized RF Signal

Generators, Phase Locked Loops, Direct Digital Synthesizers, Hybrid

Synthesizers, RF Sub Assemblies, GPS Receivers, RF PCB's, CPLD's and more.

Please see the products I designed at http://www.dkdinst.com

1980- 1992 Engineer, US Navy Point Mugu, PT. Mugu, Ca. 93042

Civilian employee in Missile Systems Group, Simulation Laboratory for the

AMRAAM missile group at Point Mugu Navy base. Position entailed a secret

clearance. Experience was related to RF/Microwave, Radar, Electronic

Warfare, Optics and signal processing associated with the AMRAAM missile

program.

Education BSEE (UCSB) and MSEE (Cal Poly SLO) References Available on

request

Dan Doberstein, BSEE/MSEE, 750 Amber Way, Nipomo, California, PH. 805-929-

2290

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