宽带L型非均匀阵的极化和到达角的联合估计  

Joint estimation of polarization and direction of arrival based on the wideband L-shaped sparse array

作　　者：常虹[1] 赵国庆[1] 石海杰[2] 

机构地区：[1]西安电子科技大学电子对抗研究所,陕西西安710071 [2]中北大学信息与通信工程学院,山西太原030051

出　　处：《西安电子科技大学学报》2011年第2期112-115,140,共5页Journal of Xidian University

基　　金：国家部委预研基金资助项目(JY0100090201)

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.该算法采用多基线极化-相位干涉仪构成的L型非均匀阵,利用两臂中的不同极化天线的互相关谱相位中包含的极化方位信息实现联合估计,具有硬件结构简单、易于实现等特点.参数估计值采用对应各基线估计值加权平均的方法,证明了各基线长度的平方是最佳加权系数.计算机仿真验证了该算法的正确性.A high accuracy algorithm for direction of arrival（DOA） and polarization estimation for the wideband signal is proposed.The L-shaped sparse array is exploited in this method,which consists of multi baseline phase-polarization interferometers.Joint estimation is realized by utilizing direction and polarization information involved in the cross-correlation spectrum phase from the outputs of sensors with different polarizations in two linear arrays.It has the advantage of simple configuration which is suitable for realization.Parameter estimations are given by weighting and averaging the results from different baseline interferometers.The optimum weighting coefficients are given by the square of baseline lengths.Simulation results show the correctness of the algorithm.

关 键 词：宽频段 极化-相位干涉仪 极化 到达角 加权平均 

分 类 号：TN971.6[电子电信—信号与信息处理]