Results 51 to 60 of about 1,979 (208)

Iterative Decoding of Serial Concatenated Convolutionally Encoded Signals over Frequency Selective Fading Channels

Journal of Engineering and Sustainable Development, 2007
Serial concatenated convolutional coding with iterative decoding is examined for data transmission employing BFSK (binary frequency shift keying) modulation and non-coherent detection receiver.
Maha George Zia
doaj  

Body‐integrated photonic biosensors: Illuminating the path to active healthcare

FlexMat, EarlyView.
Body‐integrated photonic biosensors are promising tools for active healthcare. These optical devices can be worn, implanted, or swallowed to monitor health signals continuously. This review introduces key sensing modalities, including fluorescence, colorimetry, SPR, LSPR, SERS, and light‐modulating materials.
Jiayue Gu, Xingming Wen, Qihang Yan, Yining Zhao, Linghao Yuan, Siyuan Chen, Yue Ma, Zhengyue Fang, Dong Lei, Yuxin Liu, Ze Xiong   +10 more
wiley   +1 more source

Closed-form Distribution and Analysis of a Combined Nakagami-lognormal Shadowing and Unshadowing Fading Channel

Journal of Telecommunications and Information Technology, 2016
The realistic wireless channels face combined (time shared) Nakagami-lognormal shadowing and unshadowing fading because of time varying nature of radio channel and mobile user.
Rupender Singh, Meenakshi Rawat
doaj   +1 more source

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

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

An integrative numerical method for evaluating Ergodic capacity of multi-user NOMA over faded channels with imperfect-CSI and SIC

e-Prime: Advances in Electrical Engineering, Electronics and Energy
With increased demand for the internet and the Internet of Things (IoT), future wireless communication networks are draw more attention to afford the massive connectivity, capacity, and extensive coverage requirements.
Thaherbasha Shaik, Nageena parveen SD, Hareesh Ayanampudi, Ravindra Dhuli   +3 more
doaj   +1 more source

On Selection Combining Diversity in Dual-Hop Relaying Systems Over Double Rice Channels: Fade Statistics and Performance Analysis

IEEE Access, 2020
This paper investigates the performance of selection combining (SC) diversity in dual-hop cooperative networks under double Rice fading channels. Expressions for the probability density function (PDF), cumulative distribution function (CDF), level ...
Nazih Hajri, Rym Khedhiri, Neji Youssef
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

Exploiting Transmit Buffer Information at the Receiver in Block-Fading Channels

EURASIP Journal on Advances in Signal Processing, 2008
It is well known that channel state information at the transmitter (CSIT) leads to higher throughput in fading channels. We motivate the use of transmit buffer information at receiver (TBIR).
Dinesh Rajan
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