1. By Alex Wright and Terrence Bunkley Mentored by Dr. Kamesh Namaduri College of Engineering Department of Computer Science and Engineering Department of Electrical Engineering

2.  Background  Purpose  Hypothesis

3.  What got us interested?  Why not use GPS?  What are the possible wireless localization methods?

4.  The purpose of this project is to determine the location of autonomous robots using the wireless signals (802.11 n).  We believe that the locations of the robots can be determined best using the Fingerprinting Method

5.  Materials  Methodology  Problems

6.  4 Autonomously controlled Garcia robots  Red, Blue, White, and Orange  2 Computers  Linux, Windows XP  Wireless AP’s at UNT Discovery Park  802.11 n

7.  Create a Grid-based layout  Take 10 scans of the RSSI signal  Repeat for every point mapped

8.  Time consuming  Fluctuating wireless signals  Not as accurate as expected

9.  Results  Conclusion  Questions

10.  We were able to locate the robots through WiFi signals using the Fingerprint method.  We were able to develop heat maps showing the areas where signal strength is greatest.  Created programming algorithm that allows the robots to autonomously navigate to a single relative location.

11.  Algorithm analyzes RSSI data sent from robot and compute s point

12.  Second floor lobby the west side of Discovery Park

13.  Embedded Systems Lab

14.  The location of devices are able to be located using wireless signals.  An open area would be ideal because objects absorb the signals.  A consistent transmit power should be used to improve accuracy.