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论文类型： 期刊论文

发表时间： 2012-01-01

发表刊物： ICIC Express Letters

收录刊物： EI、Scopus

卷号： 6

期号： 9

页面范围： 2363-2369

摘要： Accurate sensor localization is significant for various applications of wireless networks. In this paper, a cooperative localization of sensor nodes based on receivedsignal- strength (RSS) is proposed. Firstly, sensors estimate their positions with the help of anchor nodes and broadcast the estimates to their neighbors. Secondly, the sensors work together to refine their positions simultaneously. The refinement is described by a dynamically recursive method, referred as resampling, which can drive all the possible position estimates of a sensor with respect to the information of its neighbors towards an expected position. The proposed algorithm can eliminate large localization error caused by mirror point and measurement noise. The Posterior Cramer-Rao Bound (PCRB) of the localization error is derived. Numerical simulation results verify the novel algorithm is efficient. ? 2012 ICIC International.