Coop Exit Presentation

1

• Co-op Exit Presentation
• Reeve Ingle
• EV7 Systems Analysis Verification Branch
• Electronic Systems Test Laboratory (ESTL)
• December 11, 2006

2
Presentation Overview

• Personal Background
• Previous Co-op Tours
• EV7 Projects
• Fourier Analysis of FSK Square Wave
• Internet Protocol Research
• Experience Gained
• Co-op Activities
• Future Plans
• Acknowledgements
• Questions

3
Personal Background

• Hometown Carrollton, Georgia
• Graduated from Carrollton High School in 2003
• Valedictorian in class of 250 students
• Eagle Scout
• Senior at Georgia Tech in Atlanta, Georgia
• Electrical Engineering Major, Spanish Minor
• Outstanding ECE Sophomore Award, Deans List
• Teaching Assistant Mathematics Spanish
  Courses
• IEEE
• Eta Kappa Nu Electrical Engineering Honor Society
• Tau Beta Pi Engineering Honor Society
• Graduate in Spring 2008

4
First Co-op Tour Cargo Integration Operations
- DO5

• Japanese Experiment Module
• Electrical Power System Drawings
• JAXA/NASA End-to-End Activation Test
• STS-121 Transfer Team Support
• Console Operator Training
• Researched Methods to Clean Clothing in Space
• Website Design

Zero-G Clothes Washer
JEM ACO Website
5
Second Co-op TourElectronic Systems Test Lab
EV7
Multipath Fading Simulator

• Multipath Fading Simulator
• Firmware Radio Testing
• High-Impedance Buffer Troubleshooting and Repair

Buffer Box Repair
6
Third Co-op TourIntelligent Systems Branch ER2
SCOUT Dashboard Unit

• RF Interference Troubleshooting
• Created Spectrum Map of SCOUT Wireless Systems
• Installed BPF and Ferrite Bead
• SCOUT Dashboard Unit
• Speedometer
• Odometer
• Battery Voltage
• Temperature
• Emergency Stop LEDs
• Desert RATS Field Test Support

RF Mapping of SCOUT Rover
7
EV7 Projects Fourier Analysis of FSK Square
Wave

• Purpose
• FM Transmitter Configuration
• ESTL currently configures FM transmitters using a
  sinusoidal modulating signal
• Many FSK transmitters have digital front ends
  that only support pulse modulation
• Allows beta values (?f / R) to be configured
  using square wave (1010 or 1100 pattern)
  modulating signal
• Analysis of FSK Transmission Sequences
• Preamble Digital 1010 training sequence
• Results in additional power levels at center
  frequency and harmonics

8
Method 1 Closed-Form Solution of Fourier Integral
Pulse Train
RF Pulse Train
ReconstructedSignal
FSK Square Wave
Fourier Coefficients
Sum of 2 RF Pulse TrainsOffset 180
9
Method 2 Numerical Evaluation of Fourier
Integral Using Symbolic Mathematics Program
FSK Square Wave
x(t)
Fourier Integral
Normalized Fourier Series Coeffs.
dBc
10
Method 3 Fast Fourier Transform (FFT)
FSK Square Wave
x(t)
Sample Signal
s(t)
FFT
11
FSK Square Wave Spectrum Calculated via
Closed-Form Solution
Components occur at fc nfm fmR/2 for 1010,
fm R/4 for 1100
12
Table Excerpts for Small and Large Beta Values
Small Beta Values (0 5)
Large Beta Values (5 100)
13
EV7 Projects Internet Protocol Research

• Internet Protocol (IPv6)
• New Header Format Extension Headers
• Encapsulating Security Payload (ESP)
• Authentication Header (AH)
• Larger Address Space
• Better QoS Support
• Using Flow Label Field
• Extendibility

IPv6 Packet Header
14
C9 Reduced Gravity Program

• Member of Proposal Selection Committee
• NASA Mentor for Middle School C9 Reduced Gravity
  Team
• Experiment Reaction rate of a chemical process
  in microgravity versus earth gravity
• Authored Test Equipment Data Package (TEDP)
• Provided technical guidance and advice
• Physiological training in hypobaric chamber
• Traveled to Seattle, Washington to meet with
  school, work on experiment, and finalize TEDP
• Fly with team on C9 in February

15
Experience Gained

• Through-Hole Soldering Training per NASA Flight
  Standards
• Lab Test Equipment
• Mathematical Theory of FM FSK Transmission
  Schemes
• Leadership Experience as NASA Mentor for C9
  Reduced Gravity Team

Through-Hole Soldering Design Board
16
Co-op Activities

• Lectures
• John Young
• Tours
• Neutral Buoyancy Lab
• Co-op Committees
• Housing Guide
• Co-op Webmaster
• Social
• Co-op Softball Team
• Wings Over Houston Airshow
• Backpacking in Guadalupe Mountains National Park
• Carlsbad Caverns
• Mountain Biking in Memorial Park
• Half Marathon Race
• Triathlon
• SCUBA Certification

17
Future Plans

• Spring Classes at Georgia Tech
• Teaching Assistant for Mathematics Course
• Summer 2007 5th Co-op Tour
• Graduate in May 2008
• Graduate School and Graduate Co-op
• Applying to Georgia Tech, MIT, Stanford, and
  Berkley for Grad School
• Begin Grad School in Fall 2008

18
Acknowledgements

• Chatwin Lansdowne
• B.G. Smith
• Ned Robinson
• Cathy Sham
• Brian Collier
• Fred Shetz
• Rick Rodriguez
• ESTL

19
Questions?