1. SDP 11 PDR Team Goeckel Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe Advisor: Dennis Goeckel MDR Keeping The Secret

2. 2 SDP 11 PDR Team Goeckel 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. 3 SDP 11 PDR Team Goeckel 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. 4 SDP 11 PDR Team Goeckel Software Requirements RX Radio TX Radio

5. 5 SDP 11 PDR Team Goeckel Radio Diagram Antenna Receiver Transmitter Microcontroller Microphone Speaker Transceiver

6. 6 SDP 11 PDR Team Goeckel MDR Demo The goal for MDR will be to demonstrate measurement of receive signal and transmitting noise. 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.

7. 7 SDP 11 PDR Team Goeckel Statistical Analysis Percentage of Coverage Number of friends Computer Simulation Results (full area)

8. 8 SDP 11 PDR Team Goeckel Statistical Analysis Number of friends Percentage of Coverage Computer Simulation Results (radius)

9. 9 SDP 11 PDR Team Goeckel Design Challenges  Noise Appropriate Signal Threshold Duration for transmission  Variable transmission strength  Making overall system compact SMD vs. Through Hole components  Demonstrate functioning system Computer display of radio activity

10. 10 SDP 11 PDR Team Goeckel Team Roles  Adebayo – Hardware design, hardware production, radio debugging  Mark – Hardware design, programming radio unit, radio debugging  Joe – Report, simulations calculations, production  Simon – Simulation programming, GUI for final demonstration, radio programming

11. 11 SDP 11 PDR Team Goeckel What is next  Use of Received Signal Strength  Complete protocols for all radios  Battery choice and integration  Field testing  GUI for Final Demonstration  Fabrication of Radios

12. 12 SDP 11 PDR Team Goeckel Questions?