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Co-op Exit Presentation Reeve Ingle EV7 – Systems Analysis & Verification Branch

Co-op Exit Presentation Reeve Ingle EV7 – Systems Analysis & Verification Branch Electronic Systems Test Laboratory (ESTL) December 11, 2006. Presentation Overview. Personal Background Previous Co-op Tours EV7 Projects Fourier Analysis of FSK Square Wave Internet Protocol Research

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Co-op Exit Presentation Reeve Ingle EV7 – Systems Analysis & Verification Branch

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  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 2

  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, Dean’s List • Teaching Assistant – Mathematics & Spanish Courses • IEEE • Eta Kappa Nu Electrical Engineering Honor Society • Tau Beta Pi Engineering Honor Society • Graduate in Spring 2008 3

  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 4

  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 5

  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 6

  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 (Δf / 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 7

  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° 8

  9. Method 2: Numerical Evaluation of Fourier Integral Using Symbolic Mathematics Program FSK Square Wave x(t) Fourier Integral Normalized Fourier Series Coeffs. [dBc] 9

  10. Method 3: Fast Fourier Transform (FFT) FSK Square Wave x(t) Sample Signal s(t) FFT 10

  11. FSK Square Wave Spectrum Calculated via Closed-Form Solution Components occur at fc+ n*fm fm=R/2 for ‘1010’, fm= R/4 for ‘1100’ 11

  12. Table Excerpts for Small and Large Beta Values Small Beta Values (0 – 5) Large Beta Values (5 – 100) 12

  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 13

  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 14

  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 15

  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 16

  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 17

  18. Acknowledgements • Chatwin Lansdowne • B.G. Smith • Ned Robinson • Cathy Sham • Brian Collier • Fred Shetz • Rick Rodriguez • ESTL 18

  19. Questions? 19

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