Device-Free Passive Localization

This report describes a Device-Free Passive Localiza- tion System (DfP). The system provides a software solution over nominal WiFi equipment to detect the presence and track intruders in an area of interest. The system is based on measuring the changes in the received RSSI at a fixed receiver form a fixed trans- mitter. Using RSSI values for multiple transmitters and monitoring points, we show a system is able to detect intruders with a high probability and very low false positive rate. Moreover, the system is able to track the intruder with an accuracy of a few feet.