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Vol. 157, Issue 10, October 2013, pp. 108-114




A High-Precision Real-Time Distance Correction Three-Dimensional Localization Algorithm Based on RSSI for WSNs
Yuanlong LIU, Yuanliang HUANG, Guizhong WU, Jiaqi ZHONG, Jiaqi LIAO

Institute of Electric Automation, Jinan University, No. 206, Qianshan Road, Xiangzhou District, Zhuhai City, Guangdong Province, 519070, China
Tel.: 13631279680, fax: 8508165
E-mail: 554745687@qq.com


Received: 11 July 2013   /Accepted: 25 October 2013   /Published: 31 October 2013

Digital Sensors and Sensor Sysstems


Abstract: In order to reduce the wireless localization error caused by RSSI, which is easily affected by environmental factors, a real-time distance correction three-dimensional localization algorithm is put forward. The algorithm configures reference nodes optimally and uses the Gaussian Model to filter values of RSSI received by nodes. Then distance data is corrected in real-time, the ill coefficient matrix correction and the maximum likelihood estimation are combined to determine unknown nodes preliminarily. After that, filtering and elimination technique are used to process location results, which effectively improve the localization accuracy. Experiment result proves that the algorithm has an excellent precision of 92.9 %, it also has characteristics of a shorter locating time, a lower hardware cost and energy consumption. So, the algorithm is of great stability and practicality.


Keywords: WSN, RSSI, Three-dimensional localization, Distance correction, Gaussian Model.


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