一种脉冲多普勒雷达解速度模糊新方法

速度模糊是脉冲多普勒雷达中的一个重要问题。在没有别的信息源情况下,需要用雷达测得的距离信息来解速度模糊,因为距离回路输出与速度回路输出代表同一个目标的距离和径向速度,它们之间存在确定关系。推导最小二乘法解速度模糊的方法,提出一种新的不变量嵌入法解速度模糊的方法。通过理论分析和仿真证明不变量嵌入法可以有效地解速度模糊,并且实质上就是最小二乘法,其在提高距离精度上等效于测距、测速回路构成的复合控制系统。

Novel method of velocity ambiguity resolution in pulse Doppler radar

Velocity ambiguity is an important problem in pulse Doppler radar.In the absence of other information sources,the range information measured by a radar can be used to resolve velocity ambiguity.The outputs of the range loop and velocity loop represent the range and velocity of the same target,and there is a certain relationship between them.The least square method used for velocity ambiguity resolution is derived,and a novel method which is called the invariant imbedding method to resolve velocity ambiguity is proposed.The theoretical analysis and simulation prove that the invariant imbedding method is effective in resoluting velocity ambiguity,and this method is the least square method in substance.The invariant imbedding method is equivalent to a compound system consisting of range loop and velocity loop in improving the range accuracy.