研究了一种战术导弹的导航滤波器。在中制导段以地面雷达作为测量单元，应用最优估计理论，设计了被称为导航滤波器的广义卡尔曼滤波器，以便于提供目标的运动状态信息。建立了导航滤波器的数学模型，并进行了公式推导和数字仿真分析。仿真结果表明，该方案能有效地估计大机动目标的运动状态信息。 A kind of tactical missile navigation filter is studied. In the guided section of the ground radar as a measurement unit, the application of optimal estimation theory, designed a generalized Kalman filter called the navigation filter, in order to provide the target’s movement state information. The mathematical model of navigation filter is established, and the formula derivation and digital simulation analysis are carried out. The simulation results show that the proposed scheme can effectively estimate the motion information of large maneuvering targets.