Results 31 to 40 of about 38,925 (285)

Direct fiber vector eigenmode multiplexing transmission seeded by integrated optical vortex emitters [PDF]

open access: yes, 2017
Spatial modes have received substantial attention over the last decades and are used in optical communication applications. In fiber-optic communications, the employed linearly polarized modes and phase vortex modes carrying orbital angular momentum can ...
Cai, Xin-Lun   +11 more
core   +1 more source

Orbital Angular Momentum Multiplexed Free-Space Optical Communication Systems Based on Coded Modulation

open access: yesApplied Sciences, 2018
In this paper, we experimentally investigate the turbulence mitigation methods in free-space optical communication systems based on orbital angular momentum (OAM) multiplexing.
Zhen Qu, Ivan B. Djordjevic
doaj   +1 more source

High throughput MIMO-OFDM WLAN for urban hotspots [PDF]

open access: yes, 2005
This paper presents a set of rigorous and comprehensive coverage and throughput studies for enhanced high-capacity Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems.
Bian, YQ   +3 more
core   +2 more sources

Test of mode-division multiplexing and demultiplexing in free-space with diffractive transformation optics [PDF]

open access: yes, 2017
open5openGIANLUCA RUFFATO, 1; FILIPPO ROMANATO, ; 1Department of Physics and Astronomy ‘G. Galilei’, University of Padova; 2Laboratory for Nanofabrication of Nanodevices, c.so Stati Uniti 4GIANLUCA RUFFATO, 1; Romanato, Filippo; Ruffato, Gianluca ...

core   +1 more source

Generation of Photon Orbital Angular Momentum and Its Application in Space Division Multiplexing

open access: yesPhotonics, 2023
In the last three decades, light’s orbital angular momentum (OAM) has been of great interest because it has unique characteristics that make it sought after in many research fields, especially in optical communications.
Temitope M. Olaleye   +2 more
doaj   +1 more source

Joint Spatial Division and Multiplexing

open access: yes, 2012
We propose Joint Spatial Division and Multiplexing (JSDM), an approach to multiuser MIMO downlink that exploits the structure of the correlation of the channel vectors in order to allow for a large number of antennas at the base station while requiring reduced-dimensional Channel State Information at the Transmitter (CSIT).
Adhikary, Ansuman   +3 more
openaire   +2 more sources

Downlink Precoding for Massive MIMO Systems Exploiting Virtual Channel Model Sparsity

open access: yes, 2017
In this paper, the problem of designing a forward link linear precoder for Massive Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core   +1 more source

Mode division multiplexing using an orbital angular momentum mode sorter and MIMO-DSP over a graded-index few-mode optical fibre [PDF]

open access: yes, 2015
Mode division multiplexing (MDM)– using a multimode optical fiber’s N spatial modes as data channels to transmit N independent data streams – has received interest as it can potentially increase optical fiber data transmission capacity N-times with ...
Ahmed, Nisar   +14 more
core   +2 more sources

Investigation of Fan In and Fan Out Technologies for Multi Core Fiber

open access: yesGuangtongxin yanjiu, 2021
Spatial division multiplexing based on the multi-core fiber has been believed as a promising and effective way to overcome the foreseeable capacity crunch of single mode fiber transmission. Fan-in Fan-out (FIFO) technology for multi-core fiber is the key
Ying QIU   +3 more
doaj   +1 more source

Near-field THz imaging and spectroscopy using a multiple subwavelength aperture modulator

open access: yes, 2013
We present a near-field, simultaneous multiple pixel subwavelength THz transmission imaging device based on a solid-state THz spatial modulator. Frequency-division multiplexing is used to acquire multiple pixels simultaneously.
Rutt, Harvey, Szelc, Jedrzej
core   +1 more source

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