Abstract
Passive bistatic radar belongs to passive radar systems and is a variant of bistatic radar that exploit non-cooperative‘illuminators of opportunity’ as their sources of radar transmission. Passive bistatic radar has a lot of advantages such as double-base system, silent acceptance, inherently low cost and so on, and hence attractive for a broad range of applications in recent years. The Passive GNSS-Based bistatic Radar system exploits Global Navigation Satellite System as the illuminators of opportunity to detect the potential targets and is inevitable affected by multipath interference due to the reflection effect of mountains and near-earth buildings. If reference signal containing multipath interference is directly used for matching filter processing, the range-Doppler diagram will show the false target formed by matching multipath interference with echo signal. In this paper, a novel blind source separation method is proposed to recovering multipath interference from reference channel data in Passive GNSS-Based bistatic Radar. The elementary reflection matrix is used as a rotation matrix to transform the cumulant matrix to realize the purpose of diagonalization. Finally the direct wave signal and multipath interference signals were separated successfully. Both theoretical analysis and simulation result verify multipath interference can be well suppressed by the proposed method.
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Wen, Y., Bai, L., Zhang, X., Shang, S., Song, D., Guo, S. (2021). Algorithm for Multipath Interference Restraint Based on Blind Source Separation in Passive GNSS-Based Bistatic Radar. In: Li, B., Li, C., Yang, M., Yan, Z., Zheng, J. (eds) IoT as a Service. IoTaaS 2020. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 346. Springer, Cham. https://doi.org/10.1007/978-3-030-67514-1_30
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