Estimation of DOA and Polarization Parameters with 2-Level Nested Vector-Sensor Array Based on Quaternion Model  

作　　者：赵继超 陶海红 

机构地区：[1]National Laboratory of Radar Signal Processing, School of Electronic Engineering,Xidian University, Xi’an 710071, China

出　　处：《Transactions of Tianjin University》2016年第6期583-589,共7页天津大学学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.60971108,No.61101243,No.61271292)

摘　　要：The quaternion coherence problem exists in the data model of the conventional dimensional reduced quaternion estimation of signal parameters via rotational invariance techniques(DRQ-ESPRIT), and DRQ-ESPRIT would lose degrees of freedom(DOFs)when it is used to implement the spatial smooth operation. An improved DRQ-ESPRIT algorithm based on 2-level nested vector-sensor array is proposed in this paper. The quaternion coherence problem is solved by switching the multiplication sequence of spatial direction vector and electric field. Meanwhile, nested array and Khatri-Rao subspace approach are used to increase the number of DOFs, thus the proposed algorithm can estimate more incident sources than DRQ-ESPRIT, and the estimations of direction of arrival(DOA)and polarization parameters are more accurate. Simulation results demonstrate the effectiveness of the proposed algorithm.The quaternion coherence problem exists in the data model of the conventional dimensional reducedquaternion estimation of signal parameters via rotational invariance techniques（DRQ-ESPRIT）, and DRQ-ESPRITwould lose degrees of freedom（DOFs）when it is used to implement the spatial smooth operation. An improvedDRQ-ESPRIT algorithm based on 2-level nested vector-sensor array is proposed in this paper. The quaternion coherenceproblem is solved by switching the multiplication sequence of spatial direction vector and electric field.Meanwhile, nested array and Khatri-Rao subspace approach are used to increase the number of DOFs, thus the proposedalgorithm can estimate more incident sources than DRQ-ESPRIT, and the estimations of direction of arrival（DOA）and polarization parameters are more accurate. Simulation results demonstrate the effectiveness of theproposed algorithm.

关 键 词：QUATERNION nested array Khatri-Rao subspace direction of arrival（DOA） polarization 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]