RSSI Assisted Coordinate-tetrahedron Centroid Localization Algorithm in Three-dimensional Space

Computer Science ›› 2015, Vol. 42 ›› Issue (4): 81-84.doi: 10.11896/j.issn.1002-137X.2015.04.015

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RSSI Assisted Coordinate-tetrahedron Centroid Localization Algorithm in Three-dimensional Space

GE Bin, ZHENG Jian-bao and HAN Jiang-hong   

  • Online:2018-11-14 Published:2018-11-14

Abstract: Three-dimensional localization is one of the important technologies of WSN.RSSI assisted coordinate-tetrahedron centroid localization algorithm in three-dimensional space was proposed.Due to the complexity of the reality environment,the cases that unknown node is not in the anchor node tetrahedron internal exist.Quality RSSI value will be screened and converted to the distance between the unknown nodes to an anchor node.Then the tetrahedron volume is calculated and compared to exclusion.The math of centroid iterative is used to solve tetrahedral which contains unknown node.In addition,a weighted centroid localization that algorithm based on RSSI average value is used to resolve the situation that does not meet the conditions.Simulation results show that this algorithm’s positioning error is smaller than coordinate-tetrahedron centroid algorithm,and a weighted centroid localization algorithm based on RSSI average value is used to increase the node coverage rate.

Key words: RSSI,Three-dimensional localization,Coordinate-tetrahedron centroid algorithm,Weighted centroid algorithm,WSN

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