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CDR Keeping The Secret

CDR Keeping The Secret . Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe Advisor: Dennis Goeckel. Brief Overview . Step 1 : Send test signal to desired radio. Step 2 : RX radio sends back reply signal. Friends measure this signal strength.

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CDR Keeping The Secret

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  1. CDRKeeping The Secret Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe Advisor: Dennis Goeckel

  2. Brief Overview Step 1: Send test signal to desired radio. Step 2: RX radio sends back reply signal. Friends measure this signal strength. Step 3: TX radio sends out message. Friends not in range transmit noise.

  3. System Requirements • Battery life of at least 12 hours • Receive and transmit • Operate while walking • Operate up to 300 meters. • Receive signal with 95% success rate. • Voice Transmission Bandwidth • Maintain secure communications • Less than 10% interception rate • Handheld and less than 2lbs.

  4. Software Requirements RX Radio TX Radio RX Radio RX Radio

  5. Radio Diagram Transceiver Microphone Receiver Antenna Microcontroller Transmitter Speaker

  6. Schematic

  7. PCB Board

  8. GUI Demonstration

  9. Testing • Problems • Board’s are unreliable for RF • Varying RSSI • Tentative Conclusion difference of .05 to .1 volt

  10. Design Challenges • Noise • Appropriate Signal Threshold • Duration for transmission • Variable transmission strength • Procuring reliable data • Demonstrate functioning system • Computer display of radio activity

  11. Team Roles • Adebayo – Hardware production, radio testing • Mark – Programming radio unit, radio debugging • Joe – Report, Hardware production, radio testing • Simon – GUI for final demonstration, radio programming, radio testing

  12. The Gantt Chart

  13. What is next • Complete protocols for all radios • Field testing • GUI for Final Demonstration • Fabrication of Radios

  14. Radio Demonstration • Send transmit signal • Receive transmit signal with receiver and eavesdropper • Friend transmits noise to block eavesdropper • Eavesdropper picks up noise signal • Receiver picks up desired transmit signal

  15. Questions?

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