Indoor Wireless Localization of Uncooperative Sources Using a Ray Tracing Model

Indoor geolocation of radio frequency (RF) transmitters is challenging due to site-specific multipath effects, especially when the sources are uncooperative. A source being uncooperative means that a-priori the transmit time, location, and power are unknown. It is proposed to use a site-specific ray tracing model to generate realistic indoor RF responses, perform geolocation using multiple methods, and compare their performance. This work will look at two types of geolocation algorithms: (1) time-difference of arrival (TDOA) and (2) received signal strength Indicator (RSSI) fingerprinting or patternmatching-based methods. An indoor space will be simulated with a grid of fixed receivers and a grid of transmit locations using Remcom'sWireless InSite. Using the output of theWireless InSite simulation the response from any given transmit location can be generated and used to evaluate geolocation performance.