NDLI: Efficient sparse parameter estimation based methods for two-dimensional DOA estimation of coherent signals

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IET Wireless Sensor Systems

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Efficient sparse parameter estimation based methods for two-dimensional DOA estimation of coherent signals

Content Provider	IET Digital Library
Author	Park, Hyung Rae Li, Jian
Abstract	This study addresses the problem of direction-of-arrival (DOA) estimation of coherent signals via sparse parameter estimation. Since many sparse methods provide good performances regardless of signal correlations and array geometry, they can be considered as candidates for DOA estimation of coherent signals impinging on a sensor array with arbitrary geometry. However, their straightforward applications require high computational loads especially for two-dimensional (2D) DOA estimation. Two efficient methods based on sparse parameter estimation are herein presented; one is a combined approach of sparse estimation and the RELAX algorithm extended for 2D DOA estimation and the other relies on the adaptive 2D grid refinement and power update control. Numerical simulations are performed to demonstrate the efficiency of the proposed methods using a uniform circular array for both 1D and 2D DOA estimation cases. It is shown that sparse asymptotic minimum variance (SAMV)-RELAX, a combined approach of SAMV and RELAX, outperforms SAMV and multi-stage SAMV in 2D scenarios without suffering from plateau effects for off-grid signals and that its computational load is significantly lower than those of SAMV and multi-stage SAMV. In addition, SAMV-RELAX does not require the difficult selection of grid parameters for fine DOA estimation unlike the multi-stage approach.
Starting Page	643
Ending Page	651
Page Count	9
ISSN	17519675
Volume Number	14
e-ISSN	17519683
Issue Number	Issue 9, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2020.0201
Journal	IET Signal Processing
Publisher Date	2020-09-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2D DOA Estimation Adaptive 2D Grid Refinement Array Signal Processing Coherent Signal Combinatorial Mathematics Direction of Arrival Estimation Efficient Sparse Parameter Estimation Fine DOA Estimation Geometry Modelling And Identification Parameter Estimation SAMV Sensor Array Signal Processing And Detection Signal Processing Theory Simulation Sparse Asymptotic Minimum Variance-RELAX Sparse Estimation Statistics Two-dimensional DOA Estimation
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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