12 papers · ranked by Valyu relevance
Garimella Rama Murthy, Kunal Sankhe
Massive MIMO, a candidate for 5G technology, promises significant gains in wireless data rates and link reliability by using large numbers of antennas (more than 64) at the base transceiver station (BTS). Extra antennas help by focusing the transmission and reception of signal energy into eversmaller regions of space.…
Manar Mohaisen, Saetbyeol Lee
In this paper, we propose a spatial modulation (SM) scheme referred to as complex quadrature spatial modulation (CQSM). In contrast to quadrature spatial modulation (QSM), CQSM transmits two complex signal constellation symbols on the real and quadrature spatial dimensions at each channel use, increasing the spectral…
Dinh-Thuy Phan-Huy, Yvan Kokar, Kammel Rachedi, Patrice Pajusco + 15 more
'Ali Mokh' 'Theoni Magounaki' 'Rizwan Masood' 'Cyril Buey' 'Philippe Ratajczak' 'Nadine Malhouroux‐Gaffet' 'Jean-Marc Conrat' 'Jean-Christophe Prévotet' 'Abdelwaheb Ourir' 'Julien de Rosny' 'Matthieu Crussière' 'Maryline Hélard' 'Azeddine Gati' 'T. Sarrebourse' 'Marco Di Renzo'] ABSTRACT In this paper, for the first…
Wai-Yiu Keung, Wing‐Kin Ma
This paper considers the context of multiuser massive MIMO downlink precoding with lowresolution digital-to-analog converters (DACs) at the transmitter. This subject is motivated by the consideration that it is expensive to employ high-resolution DACs for practical massive MIMO implementations. The challenge with using…
Jian Wang, Jun Liu, Shuhui Li, Yifan Zhao + 2 more
Orbital angular momentum (OAM), which describes tailoring the spatial physical dimension of light waves into a helical phase structure, has given rise to many applications in optical manipulation, microscopy, imaging, metrology, sensing, quantum science, and optical communications. Light beams carrying OAM feature two…
Jifa Zhang
—Joint radar and communication (RadCom) systems have been proposed to integrate radar and communication into one platform and achieve spectrum sharing in recent years. However, the joint RadCom systems cause the clutter modulation and the performance degradation of radar. Therefore, it's very essential to improve the…
Wenjiao Chen, Chunsheng Li, Ze Yu, Peng Xiao
Sub-Nyquist sampling technology can ease the conflict between high resolution and wide swath in a synthetic aperture radar (SAR) system. However, the existing sub-Nyquist SAR imposes a constraint on the type of the observed scene and can only reconstruct the scene with small sparsity (i.e., number of significant…
Amrollah Amini, Homayoon Oraizi
Spatio-temporally modulated impedance surfaces can be good candidates for generation of radiating waves with arbitrary eigenstates by breaking momentum and energy conservations. Here, we present a theoretical framework based on the holographic technique and generalized Floquet-wave expansion to analyze…
Abderrahmen Trichili, Carmelo Rosales-Guzmán, Angela Dudley, Bienvenu Ndagano + 3 more
'Bienvenu Ndagano' 'Amine Ben Salem' 'Mourad Zghal' 'Andrew Forbes'] Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data transmission…
Mickael Mounaix, Nicolas K. Fontaine, David T. Neilson, Roland Ryf + 3 more
'Haoshuo Chen' 'Juan Carlos Alvarado-Zacarias' 'Joel Carpenter'] Lossless linear wave propagation is symmetric in time, a principle which can be used to create time reversed waves. Such waves are special “pre-scattered” spatiotemporal fields, which propagate through a complex medium as if observing a scattering process…
Alan E Willner
The paper ‘Direct fiber vector eigenmode multiplexing transmission seeded by integrated optical vortex emitters’ by J Liu1 has successfully demonstrated that different data-carrying vector modes can be used to increase capacity through data-carrying, full-vectorial fiber eigenmode multiplexing communications in…
Michael Dumelle, Matt Higham, Jay M. Ver Hoef, A. K. M. Anisur Rahman
'A. K. M. Anisur Rahman'] spmodel is an R package used to fit, summarize, and predict for a variety spatial statistical models applied to point-referenced or areal (lattice) data. Parameters are estimated using various methods, including likelihood-based optimization and weighted least squares based on variograms.…