基于曲面拟合的宽带阵列模型误差有源校正  

Active Calibration for Model Errors of Wideband Array Based on Surface Fitting

作　　者：张兴良[1] 王可人[1] 阮怀林[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《火力与指挥控制》2014年第9期15-18,共4页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(61171170)

摘　　要：针对阵列模型误差难以建模的问题,提出一种新的非参数化有源校正方法。首先,测量部分离散方向点上的导向矢量。然后,利用测得的导向矢量拟合所有的模型误差曲面,并得到多项式系数。最后,在DOA估计时利用多项式系数计算所有方向和频率上的导向矢量。该方法适用于宽带阵列,且需要的数据存储量小。仿真实验结果表明该方法的校正误差非常小。因此,该方法具有一定的工程实用价值。Considering that array model errors is diffcult to be modeled,a new non-parametric method of active calibration is proposed in this paper. First,the steering vectors in discrete directions are measured. Then,all curved surfaces of model errors is fitted with the measured steering vectors. Finally,the multinomial coefficients of the curved surfaces are used to compute the steering vectors for DOA estimation. The new method which requires little memory space,is applicable to wideband array. The results of simulation experiments show that the calibration errors of the new method are very small. Therefore,the new algorithm is valuable in engineering practice.

关 键 词：有源校正 模型误差 宽带阵列 曲面拟合 最小二乘 

分 类 号：TN911.23[电子电信—通信与信息系统]