雷达导引头斜投影抗质心干扰性能分析

发布时间：2018-11-01 19:15

【摘要】：箔条、角反射器等质心干扰诱使雷达导引头目标指示角偏离目标,导致导弹脱靶.为了解决这一问题,该文利用目标与干扰极化状态的差异性,通过目标、干扰极化相位描述子构造出斜投影算子,然后采用斜投影处理来抑制雷达导引头质心干扰.鉴于实际中目标、干扰极化状态难以准确估计,重点分析了目标、干扰极化相位描述子估计误差对斜投影输出目标、干扰信号的影响,推导得到了斜投影输出目标、干扰信号误差解析表达式;在此基础上,进一步推导得到了斜投影输出干信比、单脉冲比误差与目标、干扰极化相位描述子估计误差之间的关系式.理论分析与仿真结果表明,斜投影处理后的雷达导引头测角误差与目标极化相位描述子估计误差无关,与干扰极化相位描述子估计误差有关;干扰极化相位描述子估计误差在-10度到10度范围内时,斜投影仍具有一定的干扰抑制能力,有助于提高导引头的测角精度.
[Abstract]:Chaff, angular reflector and other centroid interference induce the radar seeker target to deviate from the target, resulting in missile miss. In order to solve this problem, an oblique projection operator is constructed by using the target and interference polarization phase descriptor, and then oblique projection processing is used to suppress the centroid interference of radar seeker. In view of the fact that the target is difficult to estimate accurately, the target is analyzed emphatically. The effect of the estimation error of the interference phase descriptor on the output target of oblique projection and the jamming signal are analyzed. The output target of oblique projection is derived. Analytical expression of interference signal error; On this basis, the relationship between the output signal ratio of oblique projection, the error of monopulse ratio and the estimation error of target and interference polarization-phase descriptor is derived. The theoretical analysis and simulation results show that the angle measurement error of radar seeker after oblique projection is independent of the estimation error of the target polarization phase descriptor, and is related to the interference polarization phase descriptor estimation error. When the estimation error of the interference polarimetric descriptor is in the range of -10 degrees to 10 degrees, the oblique projection still has a certain ability of interference suppression, which is helpful to improve the precision of angle measurement of the seeker.
【作者单位】：国防科技大学电子信息系统复杂电磁环境效应国家重点实验室;
【基金】：国家自然科学基金(No.61372170) 国防科技大学优秀研究生创新资助项目(No.B110406) 湖南省研究生科研创新项目(No.CX2011B021)
【分类号】：TN974

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