Localization at wireless sensor networks by time difference of arrival method

Abstract

In this project, time difference of arrival method is tried for localization and tracking wireless sensor networks. Radio communication frequency is 2.4GHz, ultrasound frequency is 40kHz. System is designed by similar 5 hardware, 3 of them for reference, one of them moving and one of them for interface hardware to send data to computer. Moving hardware's location is mapped live on a screen and its refresh frequency is 1Hz. Localization error is smaller than 5cm.