【作者】 魏涛丽；

【导师】 王兰美；

【作者基本信息】 西安电子科技大学 ， 无线电物理， 2011， 硕士

【摘要】 论文研究了极化敏感阵列的取向误差、幅相误差及耦合误差的有源校正与补偿。主要研究了幅相误差和耦合误差的误差矩阵建模以及不同情况下各种误差矩阵的估计问题。本文主要从降低信号源的要求和提高误差矩阵估计精度两个方面进行研究。首先,研究了电磁矢量传感器阵列取向误差。一方面,提出了利用两个参数未知的信号源估计电磁矢量传感器阵列取向误差的方法；另一方面,提出了一阶Taylor近似情况下的取向误差矩阵的两种估计方法,利用一个参数未知的信号源,根据理想的和存在取向误差的电磁矢量传感器测得的Poynting矢量之间的关系,通过数学推导给出了取向误差的计算公式。其次,研究了比值法和矩阵块运算法两种估计电偶极子组幅相误差的新方法,分别用一个和两个参数未知的的信号源,同时入射到理想的和存在幅相误差的电偶极子组上的采样数据进行误差估计。最后,研究了电磁矢量传感器阵元通道之间的相互耦合产生的通道耦合误差的估计和补偿。在分析耦合误差影响因素的基础上,建立了阵元通道耦合误差矩阵的数学模型,依据耦合误差矩阵的特点对矩阵进行了矩阵等价变换处理,从而简化了耦合误差矩阵的求解。更多还原

【Abstract】 The calibration and remedy of polarization sensitive array, including misorientation, gain and phase error and coupling error were researched in this dissertation. It is that the modeling of error matrix for gain and phase error and the coupling error, and the estimation of various error matrix in different circumstances was mainly studied. The study focuses on two aspects:reducing the requirement of signal source and improving the estimation precision of error matrix.Firstly, the misorientation of the electromagnetic vector sensor array has been studied. On the one hand, a novel calibration method has studied by using two parameter unknown reference signals, based on the misorientation of the electromagnetic vector sensor array. On the other hand, two novel estimation methods in the first-order Taylor approximate are presented by using one parameter unknown reference signal, based on the relationship of Poynting vector between ideal electromagnetic vectors and misorientation electromagnetic vectors. The computational formulas of the orientation errors have been derived in this paper.Secondly, two novel calibration and remedy methods of gain and phase error for Triple-dipole sensor have been proposed. Reference signals with one or two parameter unknown incident on the ideal and nonideal triple-dipole sensor and the time sample data of those have been used to estimate the error matrix.Lastly, the mutual coupling between the array element channels of electromagnetic vector sensor has been studied. On the foundation of analysing the influencing factors of coupling error, the mathematical model of the array element channel coupling error matrix has been established. According to the characteristics of coupling error, equivalence transformation of matrix has done, and which simplifies the solving of coupling error matrix.更多还原