摘要
针对均匀圆阵互耦自校正问题,提出了一种基于旋转不变参数估计(ES-PRIT)技术的互耦自校正算法。通过模式空间转换技术将互耦影响下的均匀圆阵流型向量近似等效为存在幅相误差的虚拟均匀线阵流型向量,并且该幅相误差矩阵满足中心对称性。利用该性质并结合ESPRIT技术分别给出了信源方位和互耦向量的闭式解。为了减少模式空间转换偏差的影响,基于Belloni方法,给出了一种互耦影响下抵消模式空间转换偏差的方法。仿真实验验证了新算法的有效性。
Aiming at the mutual coupling self-calibration problem for uniform circular array（UCA）, an efficient self-calibration algorithm based on estimating signal parameter via rotoational in variance technology（ESPRIT） technique is presented. Firstly, through the mode space transforming technique,the steering vector of UCA in the presence of mutual coupling is transformed into the steering vector of a virtual uniform linear array（ ULA） with gain and phase uncertainty. The gain and phase errors diagonal matrix takes the property of centro-symmetry, based on which the closed-form solutions for source azimuths and mutual coupling vector can be obtained via the ESPRIT technique. Furthermore, a method of bias reduction for mode space transforming in the presence of mutual coupling is given on the basis of Belloni method. Computer simulation results validate the effectiveness of the proposed algorithm.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第2期253-261,共9页
Chinese Journal of Radio Science
基金
信息工程大学博士研究生学位论文创新基金(BSLWCX200801)
