Cooperative wireless localization based on weighting for vector‐addition error. (6th November 2014)

• Record Type: Journal Article
• Authors: Cui, Qimei; Shi, Yulong; Zhang, Xuefei; Tao, Xiaofeng
• Is Part Of: International journal of communication systems. Volume 29:Number 15(2016)
• Page Start: 2205
• Page End: 2226
• Publication Date: 2014-11-06
• Subjects: cooperative wireless localization -- factor graph -- position ambiguity -- weighting -- vector‐addition error; Telecommunication systems -- Periodicals; 621.382
• DOI: 10.1002/dac.2894
• Languages: English
• ISSNs: 1074-5351

Abstract

Summary: Localization error occurrence due to a position ambiguity is a very critical problem in wireless distributed cooperative localization, which may, in turn, affect the reliability of the localization of the whole or a major portion of the network. In this paper, we formulate a two‐dimensional cooperative localization model via graph partition in arbitrary topologies while considering the cooperative node's (or neighbor's) position ambiguity. Based on this model, we establish a robust algorithm, named weighted factor graph (FG)‐based cooperative localization algorithm, by mapping local topologies into the FG and by incorporating the vector‐addition error as the weight. The vector‐addition error includes the measurement error and the neighbor's position ambiguity, simultaneously. The optimal weight is derived theoretically according to the statistic properties of the vector errors and the joint probability density function. Theoretical analysis and numerical results indicate that the proposed algorithm can acquire higher level of accuracy for localization in various topology scenarios in comparison with some typical algorithms. Copyright © 2014 John Wiley & Sons, Ltd. Abstract : We establish a weighted FG‐based cooperative localization algorithm, by mapping local topologies into the factor graph and by incorporating the vector‐addition error as the weight while considering the cooperative nodes (or neighbors) position ambiguity.