Results 111 to 120 of about 5,337,605 (357)

High-sensitivity detection of narrowband light in a more intense broadband background using coherence interferogram phase

, 2006
This paper describes an optical interferometric detection technique,. known as the interferogram phase step shift, which detects narrowband, coherent, and partially coherent light in more intense broadband incoherent background light using changes in the
Coutinho, RC, Griffiths, HD, Selviah, DR
core  

Photonics-Based Broadband RF Spectrum Measurement With Sliced Coherent Detection and Spectrum Stitching Technique

IEEE Photonics Journal, 2017
A novel photonics-based channelization approach is proposed for broadband radio frequency (RF) spectrum measurement with a single optical frequency comb, sliced coherent detection (SCD), and improved fast fourier transform-based digital signal processing.
Guangyu Gao, Lihua Lei
doaj   +1 more source

Understanding Further the Phenotypic Spectrum of Central Nervous System Inflammatory Demyelinating Disorders Using Unsupervised Clustering

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Central nervous system (CNS) inflammatory demyelinating syndromes, including multiple sclerosis (MS), aquaporin‐4 antibody–positive neuromyelitis optica spectrum disorder (AQP4 + NMOSD), and myelin oligodendrocyte glycoprotein (MOG) antibody–associated disease (MOGAD), occasionally overlap.
Bade Gulec, Elif Everest, Melih Tutuncu, Ugur Bilge, Sabahattin Saip, Ugur Uygunoglu, Aksel Siva   +6 more
wiley   +1 more source

A Near-Capacity Differentially Encoded Non-Coherent Adaptive Multiple-Symbol-Detection Aided Three-Stage Coded Scheme [PDF]

, 2010
This paper presents an Irregular Distributed Hybrid Concatenated Differential (Ir-DHCD) coding scheme contrived for the relay aided differential decode-and-forward (DDF) cooperative system using multiple-symbol differential sphere detection (MSDSD ...
Wang, Li, Li Wang, Kong, Lingkun, Ng, Soon, Soon Xin Ng, Lingkun Kong, Hanzo, Lajos, Lajos Hanzo   +7 more
core   +1 more source

Weak Coherent Light Interference Heterodyne Detection Based on Time-Domain Signal Analysis

IET Signal Processing
Weak coherent light interference heterodyne detection is the theoretical basis for fiber optic gyroscopes, optical coherence tomography, and optical time-domain reflectometers.
Hui Shen, Yousen Li
doaj   +1 more source

Multiple symbol soft-output non-coherent detection of serial concatenated CPM

Tongxin xuebao, 2012
A non-coherent detection algorithm for CPM was proposed.Several sequential symbols were used as the observation window to calculate the prior probability for codeword in CPM soft demodulation process,and the more observation symbols were used,the better ...
You-fu YANG, Jian-wei LIU, Qi-shan ZHANG, Chun-di XIU   +3 more
doaj   +2 more sources

112 Gb/s transmission over 80 km SSMF using PDM-PAM4 and coherent detection without optical amplifier.

Optics Express, 2016
Polarization-division-multiplexed (PDM) four-level pulse amplitude modulation (PAM4) with coherent detection is a promising low cost solution for 80 km inter-datacenter transmissions at 100 Gb/s and beyond.
Xian Zhou, K. Zhong, Jiahao Huo, Lei Gao, Yiguang Wang, Liang Wang, Yanfu Yang, Jinhui Yuan, Keping Long, L. Zeng, A. Lau, Chao Lu   +11 more
semanticscholar   +1 more source

MOGAD Is the Most Common Cause of Isolated Optic Neuritis in Children

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives The study aimed to characterize the clinical features, etiologies, and outcomes of isolated, first‐time pediatric ON in the post‐MOG‐IgG era. Methods This was a single‐center retrospective cohort study at Texas Children's Hospital of patients diagnosed with first‐time ON between 2018–2024, with follow‐up data collected through 2025.
Chaitanya Aduru, Akansha Chandrasekar, Kyla Blasingame, Jonathan Rosen, Jesse M. Levine, Karla Salazar, Madhuri Chilakapati, Rod Foroozan, Victoria Hardwick, Jonathan M. Yarimi, Nikita Shukla, Timothy E. Lotze, Kristen S. Fisher, Alexander J. Sandweiss   +13 more
wiley   +1 more source

Non-coherent and Differentially Coherent code acquisition in MIMO assisted DS-CDMA multi-path downlink scenarios

, 2008
In this contribution we investigate both Differentially Coherent (DC) and Non-Coherent (NC) code acquisition schemes in the Multiple Input Multiple Output (MIMO)-aided Direct Sequence-Code Division Multiple Access (DS-CDMA) downlink, when communicating ...
Won, S, Hanzo, L.
core  

Two-Stage n-PSK Partitioning Carrier Phase Recovery Scheme for Circular mQAM Coherent Optical Systems

Photonics, 2016
A novel two-stage n-PSK partitioning carrier phase recovery (CPR) scheme for circular multilevel quadrature amplitude modulation (C-mQAM) constellations is presented.
Jaime Rodrigo Navarro, Aditya Kakkar, Xiaodan Pang, Miguel Iglesias Olmedo, Oskars Ozolins, Francesco Da Ros, Molly Piels, Richard Schatz, Darko Zibar, Gunnar Jacobsen, Sergei Popov   +10 more
doaj   +1 more source