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A Novel Distributed Sensor Fusion Algorithm for RSSI-Based Location Estimation Using the Unscented Kalman Filter

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Abstract

We address the Bayesian sensor fusion approach for distributed location estimation in the wireless sensor network. Assume each sensor transmits local calculation of target position to a fusion center, which then generates under a Bayesian framework the final estimated trajectory. We study received signal strength indication-based approach using the unscented Kalman filter for each sensor to compute local estimation, and propose a novel distributed algorithm which combines the soft outputs sent from selected sensors and computes the approximated Bayesian estimates to the true position. Simulation results demonstrate that the proposed soft combining method can achieve similar tracking performance as the centralized data fusion approach. The computational cost of the proposed algorithm is less than the centralized method especially in large scale sensor networks. In addition, it is straightforward to incorporate the proposed soft combining strategy with other Bayesian filters for the general purpose of data fusion.

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Acknowledgements

This work is partly supported by Chengdu Technological University (Grant No. 2020ZZ004) and Sichuan Provincial Department of Science and Technology (Grant No. 18YYJC1705).

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Authors and Affiliations

  1. Institute of Wireless Smart Sensing, Chengdu Technological University, No. 1, Section 2, Zhongxin Avenue, Pidu District, Chengdu, 611730, Sichuan, People’s Republic of China

    Yufang Yin, Qiyu Wang, Huijie Zhang & Hong Xu

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  1. Yufang Yin
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  2. Qiyu Wang
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  3. Huijie Zhang
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  4. Hong Xu
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Correspondence to Yufang Yin.

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Yin, Y., Wang, Q., Zhang, H. et al. A Novel Distributed Sensor Fusion Algorithm for RSSI-Based Location Estimation Using the Unscented Kalman Filter. Wireless Pers Commun 117, 607–621 (2021). https://doi.org/10.1007/s11277-020-07888-w

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