An Improved Ultrasonic-Based Localization Using Reflection Method
CAR '09 Proceedings of the 2009 International Asia Conference on Informatics in Control, Automation and Robotics
COLA: Complexity-Reduced Trilateration Approach for 3D Localization in Wireless Sensor Networks
SENSORCOMM '10 Proceedings of the 2010 Fourth International Conference on Sensor Technologies and Applications
Sub-area localization: a simple calibration free approach
Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems
Deterministic secure positioning in wireless sensor networks
Theoretical Computer Science
Indoor geolocation in the absence of direct path
IEEE Wireless Communications
Secure localization and authentication in ultra-wideband sensor networks
IEEE Journal on Selected Areas in Communications - Part 1
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Localization in an urban area is a challenging problem due to the blocking of Line-of-Sight (LOS) signal by various obstacles and also the multipath effect arising out of reflections and scattering of signals. Assuming that there are a few anchor nodes which know their positions accurately and which transmit ultrasonic signals, we propose here a technique to find the position of other sensor nodes based on receiving these ultrasonic signals reflected by some reflectors. Our proposed technique can calculate the position of a node correctly by receiving two reflected signals (Non-Line-of-Sight (NLOS)) from an anchor. We, however, assume that a signal is reflected at most once before reaching a node and the two reflecting surfaces are non-parallel to each other.