Results 61 to 70 of about 2,223,777 (199)

Identity‐Enabled CDMA LiDAR for Massively Parallel Ranging with a Single‐Element Receiver

open access: yesLaser &Photonics Reviews, Volume 19, Issue 23, December 3, 2025.
A novel LiDAR system integrates CDMA modulation with a single‐element detector to achieve massive channel parallel 3D imaging. By using a user identification code and a correlation‐based feedback loop, it overcomes signal collisions and the near‐far problem.
Yixiu Shen, Zi Heng Lim, Guangya Zhou
wiley   +1 more source

Equalization of Multiuser Wireless CDMA Downlink Considering Transmitter Nonlinearity Using Walsh Codes

open access: yesEURASIP Journal on Wireless Communications and Networking, 2007
Transmitter nonlinearity has been a major issue in many scenarios: cellular wireless systems have high power RF amplifier (HPA) nonlinearity at the base station; satellite downlinks have nonlinear TWT amplifiers in the satellite transponder and multipath
Stephen Z. Pinter, Xavier N. Fernando
doaj   +2 more sources

10Gb/s Two-User Spatial Diversity FSO-CDMA Wiretap Channel Based on Reconfigurable Optical Encoder/Decoders

open access: yesIEEE Access, 2020
Due to the effect of atmospheric turbulence, the transmission reliability and physical-layer security of free space optical (FSO) communication system are facing many challenges.
Jianhua Ji   +6 more
doaj   +1 more source

Molecular Engineering of Layered Halide Double Perovskites: Challenges and Opportunities in Optoelectronics and Beyond

open access: yesAdvanced Energy Materials, Volume 15, Issue 41, November 4, 2025.
Layered halide double perovskites have emerged as promising alternatives to toxic lead‐based low‐dimensional perovskite materials for more sustainable optoelectronics. Their molecular design and its impact on the material characteristics, as well as the resulting functionality, is reviewed while discussing challenges and opportunities for future ...
Maryam Ghasemi   +4 more
wiley   +1 more source

Nonlinear Optical Properties of a Quantum Well With Short-Range Bottomless Exponential Potential

open access: yesCumhuriyet Science Journal, 2018
In the present study, the effect of the depth of the confinementpotential on the nonlinear optical of a GaAs quantum well with short-rangebottomless exponential potential is studied in detail.
Fatih Ungan
doaj   +1 more source

Plasmon‐Driven Nitrogen Photoreduction to Ammonia Using Silica‐Encapsulated Au Nanostar/TiO2 Nanohybrids

open access: yesAdvanced Energy Materials, Volume 15, Issue 33, September 2, 2025.
Photocatalytic N₂ reduction is a sustainable method for ammonia production. Au nanostars (AuNST) with TiO2 excel, especially when encased in mesoporous silica, enhancing stability and selectivity without scavengers. Electromagnetic fields at nanostar spikes drive hot‐electron transfer to TiO2 for N2 reduction under visible light, while hot holes ...
Yoel Negrín‐Montecelo   +8 more
wiley   +1 more source

Surface Energy and Morphology of Blend Films of Polystyrene and Polybutadiene

open access: yesMacromolecular Chemistry and Physics, Volume 226, Issue 17, September 5, 2025.
Blends of polystyrene and polybutadiene are highly immiscible and, when cast as films, give rise to many different structures. In this work, different experimental techniques realize the complexity of these films. Given the industrial importance of polystyrene and polybutadiene, understanding morphology is important.
Mai S.Y. Ibrahim   +10 more
wiley   +1 more source

Abstracts

open access: yesMolecular Oncology, Volume 20, Issue S1, Page 1-692, August 2026.
Abstracts submitted to the ‘EACR 2026 Congress: Innovative Cancer Science’, from 08–11 June 2026 and accepted by the Congress Organising Committee are published in this Supplement of Molecular Oncology, an affiliated journal of the European Association for Cancer Research (EACR).
wiley   +1 more source

Amplified Sensitivity in SERS Detection of L1CAM With Silver Plasmonic Mesoporous Silica Capsules on an Imprinted Films

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 14, July 25, 2025.
This study presents core‐shell Au‐Ag NPs and a novel molecularly imprinted polymer (MIP)‐based material targeting L1CAM. Thionine is used as a monomer to create the MIP on a carbon screen‐printed electrode. Functionalized Au‐AgNCs with Raman reporter 4‐mercaptobenzoic acid and anti‐L1CAM enable selective detection via surface‐enhanced Raman scattering ...
Yuselis Castaño‐Guerrero   +6 more
wiley   +1 more source

Effective Design for Optical CDMA Based on Radio over Fiber (RoF) Technique

open access: yesMATEC Web of Conferences, 2017
In this paper, the performance of OCDMA coding systems utilizing the radio over fiber (RoF) technique is presented. It has been done by means of conventional OptiSystem simulation tools, where the propagation of radio signals up to 50 km using standard ...
Rashidi C. B. M.   +4 more
doaj   +1 more source

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