1. 中航雷达与电子设备研究院航空电子系统射频综合仿真实验室,江苏,无锡,214063
2. 国防科技大学电子科学与工程学院,湖南,长沙,410073
3. 中航雷达与电子设备研究院航空电子系统射频综合仿真实验室江苏无锡,214063
4. 国防科技大学电子科学与工程学院湖南长沙,410073
纸质出版:2008
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贺治华, 王德奇. 毫米波雷达对直升机旋翼回波检测研究[J]. 电子学报, 2008,36(6):1182-1187.
HE Zhi-hua, WANG De-qi. The Research in Detection for Echo of Millimeter Wave Radar from Helicopter Blade[J]. Acta Electronica Sinica, 2008, 36(6): 1182-1187.
针对毫米波雷达直升机旋翼回波信号能量低以至检测困难的问题
本文根据旋翼回波数学模型分析了旋翼回波、地杂波和目标杂波的时域及频域特性
提出频域杂波滤除后时域检测的思路.针对直升机识别应用的现状
提出通过旋翼回波恒虚警检测保证直升机检测和识别结果信度的思想
研究了频域杂波滤除后杂波剩余和噪声的统计分布
引入滑窗检测将观测向量分为检测单元和杂波干扰参考单元以完成旋翼回波的恒虚警检测.仿真结果表明杂波滤除方法可以有效滤除地杂波和目标杂波
提高检测时的旋翼回波信杂噪比.本文设计的旋翼回波时域检测器可以在信杂噪比较低的情况下完成旋翼回波检测.
In allusion to energy of echo from rotor blade is too low to be detected
the paper analyses the time characteristic and frequency characteristic of echo from rotor blade
ground clutter and target clutter based math model of echo from rotor blade and the thought of detection for echo from rotor blade in time domain after the clutter is filtered out in frequency domain is brought forward.In allusion to the actuality of recognition for helicopter
the thought of the confident level of helicopter target recognition is guaranteed by controlling the false alarm rate of detection for echo from rotor blade is put forward and statistical distributing of clutter residual and noise after clutter is filtered out in frequency domain is researched and the detection based sliding window is applied to partition the observation vector into the detection cell and reference cell for clutter to accomplish the CFAR detection for echo from rotor blade.The simulation result indicate that the method of filtering clutter can filter the ground clutter and target clutter effectually to improve the detection SCNR of echo from rotor blade.The detector in time domain for echo from rotor blade can work well when the SNCR is low.
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