Results 11 to 20 of about 49,907 (258)

High Q-Factor Hybrid Metamaterial Waveguide Multi-Fano Resonance Sensor in the Visible Wavelength Range

open access: yesNanomaterials, 2021
We propose a high quality-factor (Q-factor) multi-Fano resonance hybrid metamaterial waveguide (HMW) sensor. By ingeniously designing a metal/dielectric hybrid waveguide structure, we can effectively tailor multi-Fano resonance peaks’ reflectance ...
Hongyan Yang   +7 more
doaj   +1 more source

CPM Signals for Satellite Navigation in the S and C Bands

open access: yesSensors, 2015
Frequency allocations in the L band suitable for global navigation satellite system (GNSS) services are getting crowded and system providers face an ever tougher job when they try to bring in new signals and services while maintaining radio frequency ...
Rui Xue, Yanbo Sun, Danfeng Zhao
doaj   +1 more source

Multi-dimensional band structure spectroscopy in the synthetic frequency dimension

open access: yesLight: Science & Applications, 2023
The concept of synthetic dimensions in photonics provides a versatile platform in exploring multi-dimensional physics. Many of these physics are characterized by band structures in more than one dimensions. Existing efforts on band structure measurements
Dali Cheng   +3 more
doaj   +1 more source

Multi-Twin-SSB Modulation with Direct Detection Based on Kramers–Kronig Scheme for Long-Reach PON Downstream

open access: yesApplied Sciences, 2019
As the demand for high data volumes keeps increasing in optical access networks, transmission capacities and distance are becoming bottlenecks for passive optical networks (PONs). To solve this problem, a novel scheme based on multi-twin single sideband (
Xiang Gao   +4 more
doaj   +1 more source

Neural Network Detection for Bandwidth-Limited Non-Orthogonal Multiband CAP UVLC System

open access: yesIEEE Photonics Journal, 2022
In this paper, we propose a novel sparse data-to-symbol neural network (SDSNN) receiver for bandwidth-limited underwater visible light communication (UVLC) based on non-orthogonal multi-band carrierless amplitude and phase modulation (NM-CAP).
Jiang Chen   +6 more
doaj   +1 more source

Orthogonal Chirp Division Multiplexing-Based Multi-Numerology Communications for 6G

open access: yesIEEE Access, 2023
This paper deals with the capability of the orthogonal chirp division multiplexing (OCDM) modulation scheme to cope with multi-numerology concept in the context of next generations of communications.
Vincent Savaux
doaj   +1 more source

Polarization-resolved ultrafast all-optical terahertz micro-grating array modulator based on Weyl semimetallic microfilm towards 6G technology

open access: yesResults in Physics, 2023
The 6th generation (6G) of communication technology, defines 0.1–1 THz as the communication band. As a result, ultrafast modulation and multi-dimensional resolution coding technologies in the terahertz band pose a big challenge.
Min Zhang   +8 more
doaj   +1 more source

Reconfigurable resonant module for multi‐band antenna design

open access: yesIET Microwaves, Antennas & Propagation, 2016
Novel resonant modules for constructing multi‐band mobile antennas are proposed in this study. The basic configuration of the module, named as the prototype module, is designed based on a series LC resonant circuit. By adding a varactor to the module, it can be transformed into a reconfigurable module.
Tsenchieh Chiu   +2 more
openaire   +1 more source

Multi-band carrier-less amplitude and phase modulation for VLC: An overview [PDF]

open access: yes2017 First South American Colloquium on Visible Light Communications (SACVLC), 2017
The rapid development of solid-state lighting technologies has been the stimulus for visible light communications (VLC) to be the focus of enormous interest over the last decade. The key feature of simultaneous data transmission and illumination using white light-emitting diodes (LEDs) makes VLC a potential candidate for future power efficient ...
P. Chvojka   +5 more
openaire   +1 more source

Study of selected harmonics elimination control technology of multi-level inverter

open access: yesGong-kuang zidonghua, 2014
In order to analyze nonlinear method of selected harmonics elimination PWM technique of multi-level inverter in-depth, several solution models of iterative algorithm were established, solution characteristics of these models were studied, and deficiency ...
YE Manyuan, LI Song, LI Bing
doaj   +1 more source

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