基于交互多模型的机载雷达高度滤波算法

Filtering Algorithm of Airborne Radar Height Based on Interacting Multi-model

机载三坐标雷达系统中,受雷达孔径的限制,俯仰方位的测角精度较差。为了获取目标在俯仰位置的精确信息,提出了基于交互多模型的机载雷达高度滤波算法。该算法先计算目标的地理高度,再采用基于匀速运动与当前统计(CS)模型的交互多模型滤波算法对目标的地理高度进行滤波。仿真结果表明:该算法在目标高度机动与非机动情况下均能有效跟踪目标高度变化,具有较好的适应性与滤波精度。

The accuracy of angle measurement is not satisfied with airborne 3-dimension radar system because of the limit of radar aperture.To acquire the accurate information of target at elevation position,this paper puts forward the filtering algorithm of airborne radar height based on interacting multi-model（IMM）.This algorithm firstly calculates the geographical height of target,then uses the IMM filtering algorithm based on uniform motion and current statistical（CS）model to perform filtering processing for the target＇s geographical height.Simulation results show that the proposed algorithm can effectively track target＇s height variation in the conditions of high mobility and non-maneuvering,and has better adaptability and filtering accuracy.