Results 21 to 30 of about 35,097 (119)
Sub-sampled exponential analysis applied to sparse planar antenna array configurations [PDF]
, 2023 Thesis (PhD)--Stellenbosch University, 2023.ENGLISH ABSTRACT: Considerable research efforts are currently ongoing for the planned Mid-Frequency perture Array of the Square Kilometre Array project, which is set to operate from 450- 1450 MHz.
Raal, Ridalise
core +1 more source
Sparse Array Signal Processing: New Array Geometries, Parameter Estimation, and Theoretical Analysis [PDF]
, 2018 Array signal processing focuses on an array of sensors receiving the incoming waveforms in the environment, from which source information, such as directions of arrival (DOA), signal power, amplitude, polarization, and velocity, can be estimated.
Liu, Chun-Lin
core +1 more source
Tensor-based approach to the co-prime planar array signal processing
Tongxin xuebao, 2020 For the co-prime planar array (CPPA) consisting of two sparse uniform rectangular array (URA),a new processing method based on tensor algebra was proposed to enhance the degrees of freedom (DoF).By dividing each URA into some overlapping subarrays,the ...
Wei RAO, Yufeng GUI, Dan LI
doaj +2 more sources
Coprime Sensing via Chinese Remaindering Over Quadratic Fields—Part I: Array Designs [PDF]
IEEE Transactions on Signal Processing, 2018 A coprime antenna array consists of two or more sparse subarrays featuring enhanced degrees of freedom (DOF) and reduced mutual coupling. This paper introduces a new class of planar coprime arrays, based on the theory of ideal lattices.
Conghui Li, Lu Gan, Cong Ling
semanticscholar +1 more source
Nanophotonics, Volume 15, Issue 14, 27 July 2026.Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li +7 more
wiley +1 more source
Sub-sampled exponential analysis applied to sparse planar antenna array configurations
, 2022 : Considerable research efforts are currently ongoing for the planned Mid-Frequency Aperture Array of the Square Kilometre Array project, which is set to operate from 450 - 1450 MHz.
Louw, Ridalise
core
Moiré Folded Helical States at the Interfaces of Heterostructures
Advanced Physics Research, Volume 5, Issue 7, July 2026.This manuscript explores a minimal ladder model of a graphene‐topological‐insulator heterostructure where moiré superlattices modulate Rashba spin‐orbit coupling. The study reveals that SOC lifs spin degeneracy, halves spectral periodicity, and induces “helicity fragmentation” across moiré minibands.
Paula Mellado
wiley +1 more source
International Journal of Mechanical System Dynamics, Volume 6, Issue 2, Page 224-246, June 2026.ABSTRACT This work addresses the challenge of bidirectional trajectory tracking in solar‐powered wheeled mobile robots (WMRs), considering the mechanical structure, actuator‐driver, and power stage subsystems. Notably, this is the first study to explicitly model and control the actuator‐driver subsystem within this context. The proposed solution relies
Benjamin Natanael Santiago‐Nogales +8 more
wiley +1 more source
Isotopy and equivalence of knots in 3‐manifolds
Journal of the London Mathematical Society, Volume 113, Issue 6, June 2026.Abstract Two knots K$K$ and J$J$ in S3$S^3$ are isotopic if and only if they are related by an orientation‐preserving diffeomorphism of S3$S^3$. This claim follows from the fact that any orientation‐preserving self‐diffeomorphism of S3$S^3$ is isotopic to the identity. We show that this same idea applies to any prime oriented closed 3‐manifold.
Paolo Aceto +4 more
wiley +1 more source
The fundamental group of the complement of a generic fiber‐type curve
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract In this paper, we describe and characterize the fundamental group of the complement of generic fiber‐type curves, that is, unions of (the closure of) finitely many generic fibers of a component‐free pencil F=[f:g]:CP2⤍CP1$F=[f:g]:\mathbb {C}\mathbb {P}^2\dashrightarrow \mathbb {C}\mathbb {P}^1$.
José I. Cogolludo‐Agustín +1 more
wiley +1 more source