An improved location estimation algorithm in an ad hoc sensor networks for indoor environments
Dr.-Ing. Oleksandr Artemenko
Prof. Dr.-Ing. Gunar Schorcht
Dipl.-Ing. Michael Binhack
- Wireless Sensor Networks (WSNs) present one of the most representative and vibrant examples of networked embedded systems. A lot of WSNs applications require the determination of the node’s location. In this paper, we propose the improvement of localization estimation of unknown wireless sensor nodes (unknowns or mobile nodes) through feeding the network with the additional information about the a priori known distances between mobile nodes. We prove experimentally on the real testbed that our method can enhance the accuracy of location estimation.
For the localization of unknowns, we have used prepositioned anchor nodes (beacons). The proposed scheme is based on the Symmetric Double-Sided Two-Way Ranging method (SDS-TWR). The WSN was implemented using ZEBRA2411 modules from senTec Elektronik GmbH, based on the chip set ZRP1 developed by Freescale Semiconductor.