Results 71 to 80 of about 1,330,151 (239)

Ambient‐Light‐Activated Rewritable Optical Patterning in Transparent Long‐Afterglow Garnet Ceramics

Laser &Photonics Reviews, EarlyView.
This work demonstrates sunlight‐activated rewritable optical information storage in transparent long‐afterglow Y3Al2Ga3O12:Ce (YAGG:Ce) garnet ceramics fabricated via solid‐state sintering with tetraethyl orthosilicate (TEOS) as a sintering aid. By integrating ambient‐light operability, reversibility, and high optical clarity in a robust ceramic host ...
Luyang Hua, Shirui Li, Mao Deng, Ting Ye, Cong Zhang, Xiuling Wang, Shuyi Zhu, Jiagang Wu, Rui Duan, Kailei Lu, Yucheng Ye, Jianqi Qi   +11 more
wiley   +1 more source

Kalman interpolation filter for channel estimation of LTE downlink in high-mobility environments [PDF]

, 2012
The estimation of fast-fading LTE downlink channels in high-speed applications of LTE advanced is investigated in this article. In order to adequately track the fast time-varying channel response, an adaptive channel estimation and interpolation ...
Dai, Xuewu, Zhang, W, Xuewu Dai, Dai, X, Yang, Y, Mitchell, JE, Yang, Yang, John E Mitchell, Xu, Jing, Jing Xu, Mitchell, John, Xu, J, Zhang, Wuxiong, Yang Yang, Wuxiong Zhang   +14 more
core   +2 more sources

Coded Modulation Assisted Radial Basis Function Aided Turbo Equalisation for Dispersive Rayleigh Fading Channels

, 2004
In this contribution a range of Coded Modulation (CM) assisted Radial Basis Function (RBF) based Turbo Equalisation (TEQ) schemes are investigated when communicating over dispersive Rayleigh fading channels.
Yee, M. S., Ng, S. X., Hanzo, L.
core   +1 more source

Closed-Form Expressions of Ergodic Capacity and MMSE Achievable Sum Rate for MIMO Jacobi and Rayleigh Fading Channels

IEEE Access, 2020
Multimode/multicore fibers are expected to provide an attractive solution to overcome the capacity limit of the current optical communication system. In the presence of strong crosstalk between modes and/or cores, the squared singular values of the input/
Amor Nafkha, Nizar Demni
doaj   +1 more source

Diffraction‐Free Natural Optical Skyrmions and Their Subwavelength Confinement Around Vortices

Laser &Photonics Reviews, EarlyView.
ABSTRACT Diffraction causes waves to spread out as they propagate freely. The tighter the lateral confinement, the faster the spreading. Past research on how to suppress diffraction has been based on wave engineering and has led so far to idealized waves that, in real settings, eventually diffract.
Nilo Mata‐Cervera, Deepak K. Sharma, Ramon Paniagua‐Dominguez, Yijie Shen, Miguel A. Porras   +4 more
wiley   +1 more source

Hybrid deep learning for robust spectrum sensing over AWGN and fading channels

EURASIP Journal on Advances in Signal Processing
Accurate and reliable spectrum sensing (SS) is crucial for optimal spectrum usage in cognitive radio (CR) networks under challenging low signal-to-noise ratio (SNR) and fading channel conditions. The Bi-CLNetwork, a hybrid deep learning (DL) architecture,
Sarah Yahya Salih Al-Hajm, Ibrahim Develi, Kenan Kockaya   +2 more
doaj   +1 more source

Radiation Shielding Performance of B4C‐Reinforced Ultra‐High Molecular Weight Polyethylene Composites Against Low‐Energy X‐Rays: Experimental and Computational Analysis

Polymer Composites, EarlyView.
Radiation shielding behavior of B4C‐reinforced UHMWPE composites. ABSTRACT The present study investigates the radiation shielding performance of ultra‐high molecular weight polyethylene (UHMWPE) composites reinforced with varying boron carbide (B4C) contents against low‐energy X‐rays through combined experimental and computational approaches.
Elif Altındaş, Yalçın Kalkan, Gozde Celebi Efe, Aysun Ayday, Tuba Yener   +4 more
wiley   +1 more source

Design and Performance Analysis of MISO-ORM-DCSK System over Rayleigh Fading Channels

International Journal of Antennas and Propagation, 2016
A novel chaotic communication system, named Orthogonality-based Reference Modulated-Differential Chaos Shift Keying (ORM-DCSK), is proposed to enhance the performance of RM-DCSK.
Gang Zhang, Chuan gang Wang, Guo quan Li, Jin zhao Lin   +3 more
doaj   +1 more source

New insights into convection‐permitting model simulations from a ZDR$$ {\boldsymbol{Z}}_{\mathbf{DR}} $$ diagnostic for raindrops

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A polarimetric radar forward operator to simulate differential reflectivity (ZDR$$ {Z}_{\mathrm{DR}} $$) from rain was developed to evaluate simulated storms in the Met Office Unified Model (MetUM) for two case days of the Wessex Convection Experiment (WesCon) field campaign. Vertical columns of ZDR$$ {Z}_{\mathrm{DR}} $$, indicative of strong updrafts,
Chun Hay Brian Lo, Thorwald H. M. Stein, Christopher D. Westbrook, Paul R. Field, Kalli Furtado, Robert W. Scovell, Jonathan M. Wilkinson, Timothy Darlington, Humphrey W. Lean, Ryan R. Neely III, Christopher J. Walden   +10 more
wiley   +1 more source

Full-Rate, Full-Diversity Adaptive Space Time Block Coding for Transmission over Rayleigh Fading Channels

, 2005
A full-rate, full-diversity Adaptive Space Time Block Coding (ASTBC) scheme based on Singular Value Decomposition (SVD) is proposed for transmission over Rayleigh fading channels.
Ng, S.X., Yeap, B.L., Hanzo, L.
core   +1 more source