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A High Precision Direction-Finding Method Based on Multi-Baseline for Target Rescue

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Abstract

Target rescue is an important application in the Internet of Things (IoT), and the direction-finding (DF) is an essential technology for the target rescue. The DF technology based on the phase comparison method is widely used in target rescue. However, due to the phase ambiguity, the phase comparison method is difficult to meet the needs of high precision DF. The long and short baseline method can eliminate the phase ambiguity in a certain angle range, but it cannot accurately direction in all directions. In this article, we propose a high precision DF method based on the multi-baseline and multi-antenna for target rescue. Firstly, the performance of the proposed method in eliminating the inhomogeneity and azimuth ambiguity in single antenna pairs is analyzed theoretically. Then, a measurement system configured of a cycle array with eight antennas is presented to validate the practicability of the proposed method. Finally, the measurement system is verified by experiments conducted in both anechoic chamber and the out-field scenarios. The experiment results demonstrate that the error of the proposed DF method is within 2° in the anechoic chamber and within 5° in out-field. Therefore, the proposed multi-baseline and multi-antenna method can be used for high precision DF for the target rescue.

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Funding

This research was funded by the National Natural Science Foundation of China (grant Nos. 61771393 and 61571368), the Seed Foundation of Innovation and Creation for Graduate Student in Northwestern Polytechnical University.

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Authors and Affiliations

  1. School of Electronics and Information, Northwestern Polytechnical University, Xi’an, 710072, China

    Hongwei Zhao, Zichun Zhang & Haowei Xu

  2. State Key Laboratory of Air Traffic Management System and Technology, Nanjing, China

    Hongwei Zhao & Xiaozhu Shi

Authors
  1. Hongwei Zhao
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  2. Zichun Zhang
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  3. Xiaozhu Shi
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  4. Haowei Xu
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Contributions

Hongwei Zhao conceptualized the initial idea and experimental design, Zichun Zhang wrote the main manuscript text, Xiaozhu Shi helped with data collection and analysis of the results, Haowei Xu performed the experiments. All the authors read and approved the final manuscript.

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Correspondence to Hongwei Zhao.

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Zhao, H., Zhang, Z., Shi, X. et al. A High Precision Direction-Finding Method Based on Multi-Baseline for Target Rescue. Mobile Netw Appl 25, 1793–1804 (2020). https://doi.org/10.1007/s11036-020-01562-y

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  • DOI: https://doi.org/10.1007/s11036-020-01562-y

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