摘要
为了避免由于海尖峰造成的虚警现象,提出一种改进型海尖峰背景下的目标检测算法。根据海尖峰与运动目标在连续距离单元和连续脉冲构成的距离-方位二维区域中多普勒频率变化程度的差异,可以在一定程度上剔除由海尖峰形成的假目标。通过距离维多普勒频率稳定度、方位维多普勒频率稳定度可以相对准确的描述多普勒频率在距离-方位二维区域中的变化程度,通过判决门限剔除海尖峰形成的假目标,保留真实的目标信息,从而实现了运动目标与海尖峰的分离,削弱了海尖峰造成的虚警。该算法无海杂波模型限制,具有一定的通用性。通过对雷达实测海杂波数据的处理验证,该算法抑制海尖峰效果明显。
This paper proposes an improved target detection algorithm to avoid false alarm caused by sea spikes.The false targets caused by sea spikes can be eliminated to some extent by utilizing the difference of Doppler frequency variation between sea spikes and moving targets in the two-dimensional range-azimuth region composed of continuous range cells and continuous pulses.Doppler frequency variation in the range-azimuth region can be described accurately by using Doppler frequency stability in both range and azimuth dimensions.Therefore,a judgment threshold can be set to remove the false targets caused by sea spikes,separating the moving targets and sea spikes and reducing the false alarm caused by sea spikes.The proposed algorithm does not depend on any specific sea clutter model,which enables wide application scope.The test results prove that the proposed algorithm can reject sea spikes effectively.
作者
宋锐
SONG Rui(No. 20 Research Institute of CETC, Xi'an 710068)
出处
《火控雷达技术》
2021年第1期69-76,共8页
Fire Control Radar Technology
关键词
海尖峰
虚警
多普勒频率稳定度
相关性判别
方差
目标检测
sea spike
false alarm
Doppler frequency stability
correlation-based discrimination
variance
target detection
