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。
The characteristics of helicopter echoes are analyzed. According to the cyclostationary characteristics of helicopter rotor blade echoes, the correlation processing of long time blade echoes is used to increase the signal-noise rate 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 for helicopter echoes are presented.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2003年第5期452-455,共4页
Acta Aeronautica et Astronautica Sinica
关键词
目标检测
目标分类
周期平稳
相关处理
直升机
Computer simulation
Data processing
Signal detection
Signal to noise ratio
