脉冲多普勒雷达近程高仰角目标的测量

针对近程高仰角运动目标径向运动速度随仰角变化的问题,从目标的物理特性与雷达的回波特性2个方面开展了对近程高仰角目标径向运动速度的研究。通过建立近程高仰角目标的运动模型,利用级数展开与数值分析的方法得到了目标的物理特性。根据脉冲多普勒雷达在无模糊测速条件下的信号处理方法分析了雷达的回波特性,并且通过计算机仿真,验证了利用所述方法得到的目标物理特性与雷达回波特性。结果表明,对于近程高仰角运动目标,从目标物理特性的角度,其径向运动速度可以看作是加速度变化的变加速直线运动;而从雷达回波特性的角度,其径向运动速度可以理解为匀速直线运动。

Measurement of short-range high elevation angle targets with PD radar

To tackle the problem that the radial velocity of short-range high elevation target varies with elevation, the corresponding analysis was made in terms of the physical characteristic of target and the echo characteristic of radar. By developing the model of short-range high elevation target, the series expansion and numerical analysis were used to get the physical characteristic of target. According to the way of signal processing of PD radar under condition of non-vague measurement, the echo characteristic of radar was obtained. Computer simulation was performed to prove the physical characteristic of target and echo characteristic of radar. The result shows that for short-range high elevation target, in terms of physical characteristic of target, its radial velocity can be seen as varied accelerated motion; while in terms of echo characteristic of radar, its radial velocity can be seen as uniform motion.