摘要
电磁矢量传感器阵列偶极子组与磁环组之间的位置偏差影响接收信号的相位,基于特征值分解的子空间类算法对相位误差非常敏感。提出一种通过修正偶极子组与磁环组间位置偏差来校正天线相位误差的方法,采用3个空间到达角和频率已知的参考信号源,用矢量叉乘方法求得入射信号的玻印廷(Poynting)矢量,根据位置偏差与参考信号Poynting矢量复角的关系,推导出偶极子组与磁环组间位置偏差在3个坐标轴方向上的闭式解。仿真结果证明了校正方法的有效性。
The position bias between dipole triads and magnetic loop triads of electromagnetic vector sensor affects the phase of received array signal, and the subspace algorithm based on eigenvalue decomposition is very sensitive to phase error of array signal. A novel method for phase calibration is presented by correcting position bias between dipole triads and magnetic loop triads. Three reference signals with known directions of arrival and frequencies are used. the closed-form solutions of position bias in ：r,y, z axial directions are derived based on relationship between position bias and phase offset of the Poynting vector. Computer simulation results are provided to demonstrate the effectiveness of the calibration method.
出处
《雷达科学与技术》
2007年第4期312-316,共5页
Radar Science and Technology
基金
福建省高新技术基金项目(No.2005H072)
关键词
相位误差
位置偏差
阵列信号处理
电磁矢量传感器
phase error
position bias
array signal processing
electromagnetic vector sensor
