NDLI: Block sparse representation approach to 2D DOA and polarisation estimation of wideband signals using a sparse vector antenna array

Content Provider	IET Digital Library
Author	Shi, Shuli Xu, Yougen Liu, Zhiwen
Abstract	In this study, a multi-polarised two-dimensional (2D) planar array of sparsely located vector antennas (VAs) is designed for the block sparse representation (SR)-based 2D direction finding and polarisation parameter estimation of wideband signals. In order to alleviate the inter-VA mutual coupling effect, the minimum inter-VA spacing of the 2D sparse array is constrained to be no less than one wavelength that corresponds to the highest signal frequency. To reduce the computational complexity of parameter estimation, the 2D block SR model for the 2D difference coarray output at a certain frequency bin is established, under which the two direction cosine terms for 2D direction-of-arrival (DOA) estimation are decoupled with the polarimetric terms. This enables separated but simultaneous 2D direction finding and polarisation parameter estimation with the newly developed joint 2D block orthogonal matching pursuit (Joint-2D-BOMP) subband fused sparse recovery algorithm. Moreover, with the use of two spatial only (polarisation independent) over-complete dictionaries, the representation dimension of the new 2D block SR model is greatly reduced as compared with the traditional space-polarisation joint SR model. The efficacy of the presented VA array geometry and the associated parameter estimation method is validated by computer simulations.
Starting Page	1929
Ending Page	1939
Page Count	11
ISSN	17518784
Volume Number	14
e-ISSN	17518792
Issue Number	Issue 12, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/14/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2020.0207
Journal	IET Radar, Sonar & Navigation
Publisher Date	2020-09-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D Difference Coarray Output 2D Direction-of-arrival Estimation 2D DOA Estimation 2D Sparse Array Antenna Array Array Signal Processing Block Sparse Representation Direction of Arrival Estimation Electromagnetic Wave Polarisation Highest Signal Frequency Interpolation And Function Approximation Iterative Method Joint 2D Block Orthogonal Matching Pursuit Joint-2D-BOMP Minimum Intervector Antenna Spacing Mutual Coupling Effect Numerical Analysis Parameter Estimation Polarisation Independent Over-complete Dictionaries Polarisation Parameter Estimation Signal Processing And Detection Signal Processing Theory Sparse Vector Antenna Array Spatial Only Over-complete Dictionaries Subband Fused Sparse Recovery Algorithm Two-dimensional Planar Array VA Array Geometry Wideband Signal
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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