均匀线阵幅相误差和互耦效应的自校正

阵列的幅相误差和互耦效应严重影响了超分辨谱估计的性能,需要进行校正。由于均匀线阵的特殊结构,目前所采用的自校正算法呈现了多解性。分析了对均匀线阵进行自校正出现多解性的原因,在此基础上,提出了先用经典自校正算法实现互耦误差和幅度误差校正,然后用约束条件解决相位误差估计模糊的校正算法,该算法很好地解决了自校正算法对均匀线阵出现的多解性问题;利用仿真方法,验证了算法的性能。

Self-calibration Algorithm for Linear Equispaced Arrays with Gain-Phase Errors and Mutual Coupling

Gain-phase errors and mutual coupling greatly limit the performance of high resolution direction-finding algorithms.Due to the special structure of linear equispaced arrays,the conventional self-calibration algorithms present the phenomena of non-unique solutions,and this paper analyzes the reason for the non-uniqueness,and based on it,proposes a novel algorithm,which first calibrates the gain errors and mutual coupling by using the classic algorithm,then removes the ambiguity in phase-error estimation with...