航空学报 > 2003, Vol. 24 Issue (5): 452-455

悬停直升机回波信号检测和分类

李道京, 张麟兮, 俞卞章   

  1. 西北工业大学 陕西西安 710072
  • 收稿日期:2003-05-22 修回日期:2003-07-18 出版日期:2003-10-25 发布日期:2003-10-25

Detection and Classification of Hovering Helicopter Signal

LI Dao-jing, ZHANG Lin-xi, YU Bian-zhang   

  1. Northwestern Polytechnical University; Xi'an 710072; China
  • Received:2003-05-22 Revised:2003-07-18 Online:2003-10-25 Published:2003-10-25

摘要: 分析了直升机回波信号的特征,根据其旋翼回波信号周期平稳的特点,通过对长观察时间获得的直升机旋翼回波信号的相关处理,提高对低信噪比闪烁脉冲串信号的检测能力以增大雷达对悬停直升机的检测距离。在此过程中,根据闪烁脉冲出现的周期,提出的基于互相关系数的检测器,可同时完成对悬停直升机的分类。给出了仿真和实际直升机回波信号的分析处理结果。

关键词: 目标检测, 目标分类, 周期平稳, 相关处理, 直升机

Abstract: The characteristics of helicopter echoes are analyzed. According to the cyclostationary characteristics ofhelicopter rotor blade echoes,the correlation processing for long time blade echoes is used to increase the signal-noiserate of flash echoes for improving the detection range for hovering helicopters. At the same time, the cross-correlation coefficient based detector can provide the classification results for hovering helicopters by the period of flash echoes. The processing results of simulation and real data are presented.

Key words: target detection, target classification, cyclostationary, correlation processing, helicopter

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