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Vol. 167, Issue 3, March 2014, pp. 75-79

 

Bullet

 

Difference Correction RSSI Location Algorithm of Double Reference Nodes
 

Jia Song-Hao, Yang Cai

Department of Computer and Information Technology, Nan Yang Normal University, Nan Yang, 473061, China

E-mail: jsonghao@126.com

 

 

Received: 16 December 2013 /Accepted: 28 February 2014 /Published: 31 March 2014

Digital Sensors and Sensor Sysstems

 

Abstract: In order to reduce the influence of measurement errors on the received signal strength of node localization of wireless sensor network, this paper presents a difference correction RSSI location algorithm of double reference nodes (DRN-RSSI). Firstly, DRN-RSSI selects two nearest beacon nodes away from the unknown node as differential reference node. Then, it measures the coordinate of reference nodes and unknown nodes through three edge positioning method. The calculated coordinates were corrected by a weighted coefficient. According to the error value between the actual differential reference node value and its measured value, the coordinates of the unknown nodes are corrected. These measures eliminate the problem of large positioning error. The simulation results show that the localization precision of DRN-RSSI is greatly improved in various conditions.

 

Keywords: Wireless sensor network, RSSI algorithm, Log-distance Distribution Model, Three edge positioning method, Double reference nodes.

 

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