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论文类型：期刊论文

发表时间：2014-10-01

发表刊物：IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

收录刊物：SCIE、EI

卷号：61

期号：10

页面范围：5681-5689

ISSN号：0278-0046

关键字：Bayesian; device-free localization; wireless localization; wireless networks

摘要：Due to its ability of realizing localization without the need of equipping the target with a wireless device, the device-free wireless localization technique has become a crucial technique for many security and military applications. However, there still lacks an efficient scheme which could achieve robust location estimation performance with low computational cost. To solve this problem, we propose a lightweight robust Bayesian grid approach (BGA) in this paper. The BGA utilizes not only the observation information of the shadowed links, but also the prior information involved in the previous estimations and the constraint information involved in the non-shadowed links, which ensure its robust performance. Meanwhile, the BGA can be carried out with a series of lightweight grid multiplication and addition operations, which eliminates the complex matrix inversion computation involved in the traditional algorithm. The experimental results demonstrate that BGA could achieve a mean tracking error of 0.155 m with a running time of only 1.5 ms.