燕山大学信息科学与工程学院,河北,秦皇岛,066004
网络出版:2016-07-25,
纸质出版:2016
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田野, 练秋生, 徐鹤. 基于稀疏信号重构的DOA和极化角度估计算法[J]. 电子学报, 2016,44(7):1548-1554.
TIAN Ye, LIAN Qiu-sheng, XU He. DOA and Polarization Angle Estimation Algorithm Based on Sparse Signal Reconstruction[J]. Acta Electronica Sinica, 2016, 44(7): 1548-1554.
田野, 练秋生, 徐鹤. 基于稀疏信号重构的DOA和极化角度估计算法[J]. 电子学报, 2016,44(7):1548-1554. DOI: 10.3969/j.issn.0372-2112.2016.07.004.
TIAN Ye, LIAN Qiu-sheng, XU He. DOA and Polarization Angle Estimation Algorithm Based on Sparse Signal Reconstruction[J]. Acta Electronica Sinica, 2016, 44(7): 1548-1554. DOI: 10.3969/j.issn.0372-2112.2016.07.004.
现有的波达方向(Direction Of Arrival
DOA)和极化参数估计方法大多基于子空间理论.本文从稀疏信号重构角度出发
提出了一种新的DOA和极化角度估计算法.该算法首先构建一个只包含DOA信息的累积量矩阵模型
然后基于加权l
?
1
范数最小化获得DOA估计.在DOA估计的基础上
进一步通过求和平均运算构建三个包含不同极化信息的累积量向量模型
利用Zhang惩罚进行稀疏性约束
获得近似无偏的极化角度估计.阐述了如何利用极化信息来区分两个入射角度一样的信源信号.计算机仿真结果验证了所提算法的有效性.
Existing direction-of-arrival and polarization estimation methods mostly rely on subspace technique.This paper proposes a novel DOA and polarization angle estimation algorithm from sparse signal reconstruction perspective.The algorithm first constructs a cumulant matrix model which is only related to DOA parameter
and then obtains DOA estimation using the weighted l
?
1
-norm minimization.Further
this paper constructs another three cumulant vector models by sum-average arithmetic
and enforces sparsity by Zhang penalty
which leads to almost unbiased polarization angle estimation.Meanwhile
this paper also demonstrates how to identify two sources with same DOA using their polarization characteristics.Compu
ter simulation results validate the effectiveness of the proposed algorithm.
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