摘要
结合多脉冲累积探测可以提高接收信号信噪比的特点与回波延时会造成脉冲展宽的特点,介绍了一种利用激光多脉冲展宽特性识别运动目标和地面背景的方法。由于目标速度的存在改变了光轴与目标表面夹角而造成回波延时,通过判别与基准脉冲不同的相关度,将其从地面背景区分出来。仿真结果表明,累积平均脉冲个数及次数越多噪声越小,信噪比越大,且多脉冲展宽可有效识别目标与背景,可应用于实际探测中测量目标运动速度及方位。
The multi-pulse accumulation detection can improve the receiving SNR. The echo delay can cause pulse stretching combining these two properties,a method for identifying the moving target and background with multi-pulse stretching is introduced. As the target speed changes the angle between optic axis and target surface,it causes the echo delay（ pulse width） to change. The moving target can be distinguished from the background according to the shape different from the benchmark pulse. The simulation result shows that the more the pulse numbers and times of accumulation average are,the less the noise is,and the better the SNR is. The target and background can be distinguished efficiently by multi- pulse stretching,which can be used to measure the moving speed and location in real target detecting.
出处
《激光与红外》
CAS
CSCD
北大核心
2013年第12期1336-1340,共5页
Laser & Infrared
关键词
累积探测
脉冲展宽
运动目标
回波延时
accumulation detection
pulse stretching
moving target
echo delay
