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Visual thinking and simplicity of proof. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci, 2019
Cain AJ.
europepmc   +1 more source

Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities. [PDF]

open access: yesLight Sci Appl, 2019
Shen Y   +7 more
europepmc   +1 more source
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Symmetric Displaced Coprime Planar Array for Two-Dimensional Direction-of-Arrival Estimation

IEEE Sensors Journal, 2022
Recently, sparse planar arrays have been developed to improve the 2-D direction-of-arrival (DOA) estimation performance by their superiorities in the degree of freedom (DOF), array aperture, and mutual coupling over uniform planar arrays. In this article,
Wenru Tong   +3 more
semanticscholar   +4 more sources

FDA-MIMO radar for 3D localization: Virtual coprime planar array with unfolded coprime frequency offset framework and TRD-MUSIC algorithm

Digital Signal Processing, 2021
Abstract The frequency diverse array multiple-input multiple-output (FDA-MIMO) radar can detect target range by exploiting a small frequency offset across the transmit sensors, which can be utilized to jointly estimate angle and range. Nevertheless, the detection performance is basically restricted by the array aperture and signal bandwidth.
Cheng Wang, Xiaofei Zhang, Jianfeng Li
semanticscholar   +4 more sources

Generalized Coprime Planar Array Geometry for 2-D DOA Estimation

IEEE Communications Letters, 2017
In this letter, we propose a generalized coprime planar array (GCPA) geometry for 2-D direction of arrival (DOA) estimation, where two rectangular uniform planar subarrays are used. The proposed geometry allows a more flexible array layout and extends the array aperture to achieve a great performance improvement. We verify that GCPA can obtain a higher
Wang Zheng, Xiaofei Zhang, Hui Zhai
semanticscholar   +4 more sources

Two-Dimensional DOA estimation via matrix completion and sparse matrix recovery for coprime planar array

IEEE Transactions on Vehicular Technology, 2023
The coprime planar array (CPPA) can obtain a larger virtual aperture using the sum-difference co-array (SDCA). Nonetheless, the holes in the SDCA always cause the virtual aperture to be not fully utilized. In order to solve this issue, a two-dimensional (
Donghe Liu, Yongbo Zhao
semanticscholar   +4 more sources

Two-dimensional DOA Estimation for Coprime Planar Array: A Coarray Tensor-based Solution

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020
Coprime arrays can cope with the underdetermined case for direction-of-arrival (DOA) estimation. However, the popular matrix-based coarray signal processing approaches suffer performance loss on the underlying characteristics among the multi-dimensional signals.
Hang Zheng   +3 more
openaire   +2 more sources

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