ADPF Algorithm for Target Tracking in WSN
Chunhe Song, Hai Zhao, Wei Jing, Dan Liu
DOI: 10.4236/cn.2010.21007   PDF    HTML     5,511 Downloads   9,229 Views   Citations


Particle filtering (PF) has been widely used in solving nonlinear/non Gaussian filtering problems. Inferring to the target tracking in a wireless sensor network (WSN), distributed PF (DPF) was used due to the limitation of nodes’ computing capacity. In this paper, a novel filtering method—asynchronous DPF (ADPF) for target tracking in WSN is proposed. There are two keys in the proposed algorithm. Firstly, instead of transferring value and weight of particles, Gaussian mixture model (GMM) is used to approximate the posteriori distribution, and only GMM parameters need to be transferred which can reduce the bandwidth and power consumption. Secondly, in order to use sampling information effectively, when target moving to the next cluster head region, the GMM parameters are transfer to the next cluster head, and combine with the new local GMM parameters to compose the new GMM parameters incrementally. The ADPF can also deal with the situation of different number of nodes in different cluster when using the dynamic cluster structure. The proposed ADPF is compared to some other DPF for WSN target tracking, and the experimental results show that not only the precision is improved, but also the bandwidth and power is reduced.

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C. Song, H. Zhao, W. Jing and D. Liu, "ADPF Algorithm for Target Tracking in WSN," Communications and Network, Vol. 2 No. 1, 2010, pp. 50-53. doi: 10.4236/cn.2010.21007.

Conflicts of Interest

The authors declare no conflicts of interest.


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