NDLI: Improved unfolded coprime array subject to motion for DOA estimation: augmented consecutive synthetic difference co-array

Content Provider	IET Digital Library
Author	Ma, Penghui Li, Jianfeng Zhang, Xiaofei Zhao, Gaofeng
Abstract	Direction of arrival (DOA) estimation using the improved unfolded coprime array (IUFCA) subject to array motion isdiscussed in this study. Unfolded coprime array (UFCA) consists of two uniform linear subarrays, and the two subarrays are arranged at different sides of theaxis, which leads to a large number of holes in the difference co-array (DCA). With array motion and DCA synthesis,part of the holes can be filled, but there are still holes in the center which lead to the virtual arrays separated.By analyzing the hole positions in the synthetic DCA generated by UFCA motion, the authors improve the originalUFCA by relocating some physical elements, then the two dominantconsecutive DCA segments in the positive and negative sides can be connected. The expression of synthetic DCA is analyzed, and the closed-form expression of theuniform degree of freedom (uDOF) subject to IUFCA motion is studied. Simulation results show that IUFCA motion can obtain a largenumber of uDOFs, which leads to better DOA estimation performance and more identifiable signals compared with existingcoprime array configurations.
Starting Page	823
Ending Page	836
Page Count	14
ISSN	17519675
Volume Number	14
e-ISSN	17519683
Issue Number	Issue 10, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2020.0200
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/14/10
Journal	IET Signal Processing
Publisher Date	2021-01-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Array Aperture Array Motion Array Signal Processing Augmented Consecutive Synthetic Difference Co-array Closed-form Expression Coprime Element Numbers DCA Synthesis Direction of Arrival Estimation DOA Estimation Performance Dominant Consecutive DCA Segments Existing Coprime Array Configurations Improved Unfolded Coprime Array Inter-element Distances IUFCA Motion Negative Virtual Array Physical Element Positive Virtual Array Signal Processing And Detection Signal Processing Theory Synthetic DCA UDOF UFCA Motion Uniform Degree of Freedom Uniform Linear SubArray
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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