Results 1 to 10 of about 46,539 (265)
A new characterization of the dual polar graphs [PDF]
Journal of Combinatorial Theory, Series B, 2019 In this paper we give a new characterization of the dual polar graphs, extending the work of Brouwer and Wilbrink on regular near polygons. Also as a consequence of our characterization we confirm a conjecture of the authors on non-bipartite distance-regular graphs with smallest eigenvalue at most $-k/2$, where $k$ is the valency of the distance ...
Zhi Qiao 0003, Jacobus H. Koolen
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Hybrid Beamforming for dual-polarized antenna [PDF]
2019 IEEE Wireless Communications and Networking Conference (WCNC), 2019 Recently, dual-polarized antenna has attracted strong attention in Millimeter wave (mmWave) systems. It provides an additional degree-of-freedom in wireless communication, yielding higher throughput. Nowadays, with the development of antenna technology, dual-polarized large scale antenna arrays can be realized inexpensively. However, several challenges
Dien-Hoa Truong +2 more
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IEEE Access, 2020 In this paper, a dual-polarized frequency selective rasorber (FSR) with two independent transmission windows and three absorption bands is designed and characterized.
Ning Liu, Xianjun Sheng, Xia Zhao
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QoS-Aware Precoding for Dual-Polarized Downlink Massive MIMO LEO Satellite Communications
Space: Science & TechnologyLow Earth Orbit (LEO) satellite communications (SATCOM) are important for wireless networks and offer better global wireless access services than higher altitude SATCOM options.
Yan Huang, Li You, Kezhi Wang, Xiqi Gao
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Dual-Polarized Massive MIMO Systems Under Multi-Cell Pilot Contamination
IEEE Access, 2016 This paper considers a multi-cell network with base stations (BSs) equipped with large dual-polarized antenna arrays. We derive closed-form expressions of network performance in terms of user signal-to-interference-and-noise ratio both with perfect ...
Wei Xu +4 more
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A Beamwidth Reconfigurable Antenna Array With Triple Dual-Polarized Magneto-Electric Dipole Elements
IEEE Access, 2018 A novel linearly dual-polarized antenna array with triple elements is proposed for beamwidth reconfigurable base-station communications. By cutting off the arc-shaped corners on the radiated patches, the single dual-polarized antenna unit can obtain a ...
Botao Feng +3 more
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EngineeringA new, compact, and dual-band dual-polarized duplex (D3) phased array architecture is proposed in this study. In contrast to studies reported previously, this design integrates four independent beamforming systems within a single printed circuit board ...
Kai Chen +9 more
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Dual Polarized Monopole Patch Antennas for UWB Applications with Elimination of WLAN Signals
Advanced Electromagnetics, 2016 This paper presents the design, fabrication and measurement of dual polarized microstrip patch antennas for ultra wideband (UWB) applications with notch at 5-6 GHz band. The proposed antenna rejects the wireless local area network (WLAN) signals and work
P. Kumar, J. L. Masa-Campos
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IEEE AccessIn this paper, we consider a distributed antenna system (DAS) with polarized antennas for the industrial internet-of-things, where distributed sensor nodes (SNs) with a single antenna are served by the closest distributed antenna (DA) port having ...
Jungsun Um, Jaehyun Park
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On isometric full embeddings of symplectic dual polar spaces into Hermitian dual polar spaces
Linear Algebra and its Applications, 2009 Let \({\mathbb K}'\), \({\mathbb K}\) be (finite or infinite) fields such that \({\mathbb K}'\) is a quadratic Galois extension of \({\mathbb K}\) and let \(\theta\) denote the unique nontrivial element in \(\text{Gal}({\mathbb K}'/{\mathbb K})\). The dual polar space \(DW(2n-1,{\mathbb K})\), \(n\geq\,2\), has up to equivalence a unique isometric full
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