SDP 11 PDR Team Goeckel

Group: Adebayo Adeyemi, Joseph Hayward, Mark Kohls, Simon McAuliffe

Advisor:Dennis Goeckel

MDRKeeping The Secret

2SDP 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.

3SDP 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.

4SDP 11 PDR Team Goeckel

Software Requirements

RX Radio

RX Radio

RX Radio

TX Radio

5SDP 11 PDR Team Goeckel

Radio Diagram

Antenna

Receiver

Transmitter

Microcontroller

Microphone

Speaker

Transceiver

6SDP 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.

7SDP 11 PDR Team Goeckel

Statistical Analysis

Percentage of

Coverage

Number of friends

Computer Simulation Results (full area)

8SDP 11 PDR Team Goeckel

Statistical Analysis

Number of friends

Percentage of

Coverage

Computer Simulation Results (radius)

9SDP 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

10SDP 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

11SDP 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

12SDP 11 PDR Team Goeckel

Questions?