High Accuracy 2D-DOA Estimation for Conformal Array Using PARAFAC
High Accuracy 2D-DOA Estimation for Conformal Array Using PARAFAC
复制标题
使用 PARAFAC 对共形阵列进行高精度 2D-DOA 估计
DOI:
10.1155/2014/394707
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发表时间:
2014-01
影响因子:
1.5
通讯作者:
Feng, Naixing
中科院分区:
文献类型:
--
作者:
Si, Weijian;Liu, Lutao;Tian, Zuoxi;Feng, Naixing
Due to the polarization diversity (PD) of element patterns caused by the varying curvature of the conformal carrier, the conventional direction-of-arrival (DOA) estimation algorithms could not be applied to the conformal array. In order to describe the PD of conformal array, the polarization parameter is considered in the snapshot data model. The paramount difficulty for DOA estimation is the coupling between the angle information and polarization parameter. Based on the characteristic of the cylindrical conformal array, the decoupling between the polarization parameter and DOA can be realized with a specially designed array structure. 2D-DOA estimation of the cylindrical conformal array is accomplished via parallel factor analysis (PARAFAC) theory. To avoid parameter pairing problem, the algorithm forms a PARAFAC model of the covariance matrices in the covariance domain. The proposed algorithm can also be generalized to other conformal array structures and nonuniform noise scenario. Cramer-Rao bound (CRB) is derived and simulation results with the cylindrical conformal array are presented to verify the performance of the proposed algorithm.
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