1. Presented by Wosen Agedie and Samuel Walker Mentor: Dr. Beex

2. The purpose of this project is to come up with a model to accurately locate where a transmitting device is indoors where Global Positioning Systems cannot by using an indoor wireless network.

3. 1. 9-1-1 Emergency Personnel who need to locate a victim trapped in a building 2. Parents who need to locate their child in a crowded, large building (mall, museum, etc.) 3. Locate lost personal items (cell phone, keys, etc.)

4. Cognitive Radio Network Testbed

5. Gigabit Ethernet: interface between USRP2 (installed in the ceiling) and the processing platform. 12 nodes per floor for a total of 48 wireless nodes, each node is connected to a server

6. 1. Signal Function Generator 2. Cone-shaped antenna 3. USRP2 w/ WBX Daughterboard 4. Power Meter 5. NX Client 6. MATLAB 7. Microsoft Excel

9. WBX Daughterboard

10.  P rovide hardware platform for software radio  I t connects with the host computer using USB ot Gigabit Ethernet  U sually used with GNU radio software tool.  H as a motherboard wich provide the folowing subsystem : FPGA ( field-programmable gate array ) ADC ( analog-to-digital converter ) DAC ( digital-to-analog converter ) clock generation

12. Signal Generator USRP Laptop Rx Calibration Diagram Laptop USRP Power Meter Tx Calibration Diagram

14. First FloorSecond Floor

15. When each power level from nodes are plotted in order from 1-48:  We can easily spot the highest peak between the four floors of the building  The floor with the highest peak is where the transmitting device is located  The nodes with the highest power levels shows the vicinity of where the transmitter is located

16. 1. Transmitter power level is very important in order to locate a transmitter. The lower the power level, the harder it is accurately pinpoint the vicinity of the transmitter. 2. The position and number of nodes used to locate a transmitter is very important. The more nodes that are utilized, the more accurate the transmitter’s location.

17.  Find the minimum power level required to accurately locate a transmitter  Find the minimum number of nodes and the distances between each one to accurately locate a transmitter

18.  Dr. Beex and Tamoghna Roy (Mentors)  Dan Depoy (CORNET Administrator)  Dr. Dietrich (Hardware and Supplies) “Designing and Deploying a Building-Wide Cognitive Radio Network Testbed” Authors: Timothy R. Newman, S. M. Shajedul Hasan, Daniel DePoy, Tamal Bose, and Jeffrey H. Reed, Virginia Tech Published by IEEE Communications Magazine