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Indoor Localization using TDOA technique

The system which we propose to demonstrate for indoor localization competition is based on Time difference of arrival(TDOA) technique.Using our custom made hardware we could achieve localization of a mobile node by distance estimation from beacon nodes by using time difference of arrival between RF and ultrasonic signals and subsequent lateration operation. We also have developed a system for achieving localization of a mobile node using Odometry and TDOA technique which can achieve the localization with very few beacon nodes while ensuring large coverage of area.