Proceedings of the 13th EAI International Conference on Mobile Multimedia Communications, Mobimedia 2020, 27-28 August 2020, Cyberspace

Research Article

Passive Radar based on the Specific Sequence of Wireless Network

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  • @INPROCEEDINGS{10.4108/eai.27-8-2020.2294385,
        author={Qian  Zhao and Hui  Zhao},
        title={Passive Radar based on the Specific Sequence of Wireless Network},
        proceedings={Proceedings of the 13th EAI International Conference on Mobile Multimedia Communications, Mobimedia 2020, 27-28 August 2020, Cyberspace},
        publisher={EAI},
        proceedings_a={MOBIMEDIA},
        year={2020},
        month={11},
        keywords={unmanned aerial vehicles (uavs) localization interference cancellation passive radar wireless network},
        doi={10.4108/eai.27-8-2020.2294385}
    }
    
  • Qian Zhao
    Hui Zhao
    Year: 2020
    Passive Radar based on the Specific Sequence of Wireless Network
    MOBIMEDIA
    EAI
    DOI: 10.4108/eai.27-8-2020.2294385
Qian Zhao1, Hui Zhao1,*
  • 1: Beijing University of Posts and Telecommunications
*Contact email: hzhao@bupt.edu.cn

Abstract

Passive radar locates the UAV target by processing the reflected signal from non-collaborative illuminators of opportunity (IOs). It will inevitably be affected by the direct-path interference and multipath interference. The conventional passive radar uses the reference channel to receive the direct-path signal as the reference signal for interference cancellation, which is complicated in hardware and susceptible to noise. However, most of the wireless signals carry the prior information used for synchronization or channel estimation, such as the preamble of WiFi signal or the CRS of LTE signal. This paper presents a passive radar system based on the specific sequence in the wireless network, which is the prior information of IOs. Firstly, we analyze the ambiguity function of several typical specific sequences and prove their feasibility as the reference signal. Then we adopt a coherent approach for interference cancellation. The system availability is proved by simulation. A 9.64 dB reduction of interference is observed.