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针对有源校正中的多径传播问题,该文提出了校正源多径条件下的乘性阵列误差(包括幅相误差或互耦效应)校正算法.文中采用单个远场连续波校正源,通过旋转阵列天线在多个校正方位上获得校正数据,基于此依据最大似然准则建立关于乘性阵列误差参数、校正源多径传播方位以及多径衰减系数的优化模型.针对该优化模型,文中设计相应的“嵌入式”Newton型迭代算法用以实现全部未知参量的数值优化.此外,文中还推导出关于全部未知参量的克拉美罗界的闭式表达式.仿真实验验证文中校正算法的渐近有效性,即其渐近性能在大样本条件下可逼近相应的克拉美罗界.
In order to solve the problem of multipath propagation in active calibration, a correction algorithm of multiplicative array error (including amplitude-phase error or mutual coupling effect) is proposed in this paper. In this paper, a single far-field continuous- The rotating array antenna obtains the correction data in a plurality of calibration azimuths, and based on this, establishes the optimization model of the multiplicative array error parameter, the correction source multipath propagation azimuth and the multipath attenuation coefficient according to the maximum likelihood criterion. For the optimization model, The corresponding “embedded” Newton iterative algorithm is used to realize the numerical optimization of all unknown parameters.In addition, the closed form expressions for the caratmeroir bounds of all unknown parameters are deduced.The simulation results show that Asymptotic effectiveness, that is, its asymptotic behavior, can approach the corresponding caratmeline boundary under large sample conditions.