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研究了存在系统误差时修正极坐标系(MPC)下的雷达与电子支援措施(ESM)航迹关联问题。系统误差导致MPC下雷达和ESM的角度估计产生偏移,而对角度变化率、距变率与距离的比值(ITG)的估计影响不大;结合非中心卡方分布的知识,分析了雷达与ESM的测量误差对非中心参数和正确关联概率的影响;提出了一种基于积分重合度的雷达与ESM航迹对准关联算法。首先将雷达与ESM的目标映射到角度-角度变化率空间,分别得到了雷达与ESM的目标曲线,然后对两目标曲线求积分重合度,估计出雷达与ESM测角系统误差的偏移量,对偏移量补偿后进行雷达与ESM的航迹关联。仿真结果表明,本文所提算法能有效地提高存在系统误差时雷达与ESM正确航迹关联概率。
The radar and electronic support measures (ESM) track correlation problem under polar coordinate system (MPC) in the presence of systematic errors was investigated. Systematic error causes the angular estimation of radar and ESM under MPC to produce offset, but the influence on the ratio of angular rate of change, distance between variability and distance (ITG) has little effect. Combining the knowledge of non-centered chi-square distribution, ESM measurement error on the non-center parameters and the correct correlation probability; and based on the integration of the degree of coincidence radar and ESM trajectory alignment association algorithm. Firstly, the target of radar and ESM is mapped to the angle-angle rate of change space, and the target curves of radar and ESM are obtained respectively. Then the coincidence degree of two target curves is obtained, and the error of radar and ESM system is estimated. Correction of the offset after the radar and ESM track association. The simulation results show that the proposed algorithm can effectively improve the probability of correct track association between radar and ESM in the presence of systematic errors.