提高卫星导航性能的阵列参数估计算法

发布时间：2018-03-29 04:05

本文选题：卫星导航　切入点：抗干扰　出处：《宇航学报》2014年10期

【摘要】：针对卫星导航信号参数估计性能严重影响导航定位精度,提出了一种利用电磁偶极子对提高信号波达方向和极化参数估计性能的方法。充分利用接收数据协方差矩阵,通过两次特征分解,由特征分解的特征值进行极化参数估计。利用小圆环子阵导向矢量得到波达方向的粗略而无模糊的估计,大圆环子阵导向矢量得到有模糊的估计,通过解模糊得到精确的无模糊的估计,从而大幅提高了到达角的估计精度。比较了单个圆环阵列和同心圆环阵列的参数估计性能,分析了参数估计精度对抗干扰性能的影响,仿真结果表明参数估计精度的提高有效改善了卫星导航抗干扰的性能。
[Abstract]:In view of the effect of satellite navigation signal parameter estimation performance on navigation and positioning accuracy, a method is proposed to improve the estimation performance of signal DOA and polarization parameters by using electromagnetic dipole, which makes full use of the covariance matrix of received data. The polarization parameters are estimated from the eigenvalues of the eigenvalues by the two-order eigenfactorization. The rough and non-fuzzy estimation of the DOA is obtained by using the guidance vector of the small ring subarray, and the fuzzy estimate is obtained by the guidance vector of the large ring subarray. The estimation accuracy of the angle of arrival is greatly improved by solving the ambiguity, and the parameter estimation performance of a single ring array and a concentric ring array is compared, and the influence of the parameter estimation accuracy on the anti-jamming performance is analyzed. Simulation results show that the improved precision of parameter estimation can effectively improve the anti-jamming performance of satellite navigation.
【作者单位】：西安电子科技大学雷达信号处理重点实验室;西安电子科技大学物理与光电工程学院;
【基金】：国家自然科学基金(61201295,60971108);国家自然科学基金重点项目(61231017) 中央高校基本科研业务费(K5051307017)
【分类号】：TN911.23;TN96.1

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