Single Channel Interference Signal Reconstruction and Suppression Algorithm in Low Altitude Small Target Detection

doi:10.13190/j.jbupt.2020-008

Journal of Beijing University of Posts and Telecommunications ›› 2020, Vol. 43 ›› Issue (5): 143-148.doi: 10.13190/j.jbupt.2020-008

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Single Channel Interference Signal Reconstruction and Suppression Algorithm in Low Altitude Small Target Detection

SHI Xiao-zhu¹, DU Yang-fan^2,3, LI Xiao-hui^1,2, FANG Cong²

1. State Key Laboratory of Air Traffic Management System and Technology, The 28 th Research Institute of China Electronics Technology Group Corporation, Nanjing 210007, China;
2. State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China;
3. China Aerospace Science and Technology Corporation Ninth Research Institute 771 Research Institute, Xi'an 710065, China

Received:2020-01-29 Published:2021-03-11

Abstract

Abstract: In order to solve the problem that the traditional passive detection algorithm cannot achieve the reference signal reception under a single receiving channel when using mobile communication systems to detect low-altitude small targets, a direct wave suppression algorithm based on interference signal reconstruction was proposed for the detection of low-altitude small targets. Firstly, the mobile communication system is used to perceive the channel transmission environment. On this basis, the interference signals such as direct wave signal and multipath signal are reconstructed by using the time-frequency characteristics of orthogonal frequency division multiplexing. Finally, the direct wave interference in the single receiving channel is suppressed by the extended cancellation algorithm. The simulation results show that the proposed method can improve the echo detection performance and improve the accuracy of low-altitude small target detection in the case of single receiving channel of mobile communication system.

Key words: low-altitude small target detection, mobile communication system, orthogonal frequency division multiplexing, direct wave suppression

CLC Number:

TN911.22

SHI Xiao-zhu, DU Yang-fan, LI Xiao-hui, FANG Cong. Single Channel Interference Signal Reconstruction and Suppression Algorithm in Low Altitude Small Target Detection[J]. Journal of Beijing University of Posts and Telecommunications, 2020, 43(5): 143-148.

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Single Channel Interference Signal Reconstruction and Suppression Algorithm in Low Altitude Small Target Detection

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