摘要
利用移动通信系统进行低空小目标检测时,传统被动检测算法无法实现单接收通道下参考信号接收对比,提出一种基于干扰信号重构的直达波抑制算法,用于对低空小目标的检测.首先通过移动通信系统感知信道传输环境;在此基础上,利用OFDM时频特性重新构建直达波信号及多径信号等干扰信号,最后通过扩展相消算法对单接收通道中的直达波干扰进行抑制.仿真结果表明,所提方法能在移动通信系统单接收通道情况下提高回波检测性能,提高低空小目标检测的准确性.
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.
作者
石潇竹
杜洋帆
李晓辉
方聪
SHI Xiao-zhu;DU Yang-fan;LI Xiao-hui;FANG Cong(State Key Laboratory of Air Traffic Management System and Technology,The 28th Research Institute of China Electronics Technology Group Corporation,Nanjing 210007,China;State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China;China Aerospace Science and Technology Corporation Ninth Research Institute 771 Research Institute,Xi’an 710065,China)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2020年第5期143-148,共6页
Journal of Beijing University of Posts and Telecommunications
基金
空中交通管理系统与技术国家重点实验室开放基金项目(SKLATM201807)
关键词
低空小目标检测
移动通信系统
正交频分复用
直达波抑制
low-altitude small target detection
mobile communication system
orthogonal frequency division multiplexing
direct wave suppression
作者简介
石潇竹(1980—),男,研究员,E-mail:xidianshi1998@163.com.
