Results 11 to 20 of about 20,668 (239)

Distorted Laser Spot Center Positioning Based on Captured Image Under Laser-Camera Misalignment in UOWC

open access: yesIEEE Photonics Journal, 2023
The laser spot center positioning is an essential step for camera-based terminal positioning and alignment in a long-distance laser-based underwater optical wireless communication (UOWC) system.
Weijie Liu   +4 more
doaj   +1 more source

Robust and Low-Overhead Hybrid Beamforming Design With Imperfect Phase Shifters in Multi-User Millimeter Wave Systems

open access: yesIEEE Access, 2020
Phase shifters, often applied for analog beamforming in hybrid millimeter wave systems, are usually imperfect with random phase and gain errors brought by manufacture imperfections.
Wendi Wang   +3 more
doaj   +1 more source

Simultaneous Channel Estimation and Data Detection Based on Superimposed Training for Many Access MIMO System in Uplink

open access: yesIEEE Access, 2020
Massive Multiple Input Multiple Output (MIMO) has great potential to improve spectrum efficiency in the fifth generation (5G) wireless communication systems.
Kun Zhang, Wendi Wang, Huarui Yin
doaj   +1 more source

A 52-Gb/s Sub-1-pJ/bit PAM4 Receiver in 40-nm CMOS for Low-Power Interconnects

open access: yesIEEE Open Journal of Circuits and Systems, 2021
This article presents a quarter-rate source-synchronous PAM-4 receiver for energy-efficient chip-to-module communication. A novel single-stage multiple peaking continuous-time linear equalizer (MP-CTLE) using feedback enabled multiple peaking scheme for ...
Can Wang   +5 more
doaj   +1 more source

Optical wireless cochlear implants

open access: yesBiomedical Optics Express, 2019
In the present contribution, we introduce a wireless optical communication-based system architecture which is shown to significantly improve the reliability and the spectral and power efficiency of the transcutaneous link in cochlear implants (CIs).
Stylianos E. Trevlakis   +4 more
openaire   +3 more sources

Effects of High-Temperature Growth of Dislocation Filter Layers in GaAs-on-Si

open access: yesNanoscale Research Letters, 2022
GaAs-on-Si templates with two different dislocation filter layers (DFLs) were grown at 550 °C low-temperature (LT)-DFL and 660 °C high-temperature (HT)-DFL using metal organic vapor-phase epitaxy and the effects of the growth temperature were studied ...
HoSung Kim   +3 more
doaj   +1 more source

Iteration Time Prediction for CNN in Multi-GPU Platform: Modeling and Analysis

open access: yesIEEE Access, 2019
Neural networks, as powerful models for many difficult learning tasks, have created an increasingly heavy computational burden. More and more researchers focus on how to optimize the training time, and one of the difficulties is to establish a general ...
Ziqian Pei   +4 more
doaj   +1 more source

Noise Analysis and Modulation Optimization for Nonlinear Visible Light Communication System With Signal-Dependent Noise

open access: yesIEEE Photonics Journal, 2023
This article investigates the characteristics of the signal-dependent noise (SDN) and corresponding modulation design in nonlinear visible light communication (VLC) systems.
Jiaqi Wei   +3 more
doaj   +1 more source

Experimental Investigation of Underwater Optical Wireless Communication for Correlated SIMO Channel Under Temperature-Induced Turbulence

open access: yesIEEE Photonics Journal, 2023
Turbulence is an intractable issue for underwater optical wireless communication (UOWC). In this paper, the effects of temperature-induced turbulence on the UOWC system with correlated single-input multiple-output (SIMO) channel are comprehensively ...
Weijie Liu   +3 more
doaj   +1 more source

Improved Synchronization Scheme for the Photon- Counting-Based Underwater Optical Wireless Communication System

open access: yesIEEE Photonics Journal, 2023
To address existing issues in conventional correlation method, we propose an improved synchronization method for photon-counting-based underwater optical wireless communication system employing on-off keying modulation.The proposed method jointly ...
Nuo Huang   +3 more
doaj   +1 more source

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