宽频段高精度信号到达角与极化联合估计算法  

High Accuracy Joint DOA and Polarization Estimation Algorithm for Broadband Signals

作　　者：文忠[1] 李立萍[1] 陈天麒[1] 张锡祥[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都6100054

出　　处：《电子学报》2008年第3期463-466,共4页Acta Electronica Sinica

摘　　要：针对宽频段信号,提出一种高精度的到达角与极化联合估计算法.本算法采用正交偶极子稀疏均匀L型阵列,该阵列间距大于载波波长.首先通过ESPRIT算法估计出模糊的空间相位差,为解决阵列孔径与角度模糊的问题,利用正交偶极子中包含的方向信息进行解模糊.这种方法不需要损失阵元,而且能提高估计的精度.通过仿真,分析了本方法在不同信噪比下的估计性能、孔径的扩展能力以及在2-18GHz频段范围内的参数估计性能.A high accuracy estimation algorithm of joint direction-of-arrival （DOA） and polarization for broadband signals is presented in this paper. The L-shaped sparse uniform crossed-dipoles are exploited in proposed method, whose element spacing is larger than wavelength of input signals carrier. The ESPRIT method is employed to estimate the ambiguous spatial phase. In order to resolve the conflict between array aperture and angle ambiguity, the direction information involved in the crossed-dipoles is used to implement disambiguation. This approach can improve the precision of estimation without element loss. Through computer simulations, the estimate performance versus signal-noise-ratio （SNR）, the ability of extended array aperture and estirnate＇performance under the condition of signals carrier wave with 2-18GHz frequency range are analyzed.

关 键 词：阵列信号处理 宽频段 到达角 极化 稀疏阵 

分 类 号：TN911[电子电信—通信与信息系统]