Research Article
Passive Radar based on the Specific Sequence of Wireless Network
@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
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.
