Results 71 to 80 of about 2,083,913 (216)
Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT
IEEE Access, 2019 In the low earth orbit (LEO) satellite Internet of Things (IoT), the IoT devices can be distributed in remote areas (e.g., desert, ocean, and forest) for some special applications, where they are unable to have direct terrestrial network accesses and can
Chao Yang +3 more
doaj +1 more source
Noise Suppression via Gain‐Dispersion‐Managed Nonlinear Amplification in a High‐Power Er‐Fiber Laser
Laser &Photonics Reviews, EarlyView.Gain‐dispersion‐managed nonlinear pre‐amplification simultaneously suppresses phase and intensity noise, enabling scalable high‐power fiber amplification. The system delivers 102.3 W linearly polarized pulses with 1.19 µJ energy at 85.69 MHz and compresses them to 380 fs. Near‐linear power scaling without evident saturation highlights a practical route
Mei Yang +9 more
wiley +1 more source
Laser &Photonics Reviews, EarlyView.A novel optical platform integrates a Sagnac‐based interferometer with a high‐brightness multiple‐plate continuum source to advance two‐dimensional electronic spectroscopy. The robust system delivers octave‐spanning, 3.7‐femtosecond pulses and achieves intrinsic attosecond‐level phase stability without active feedback.
Wei‐Chung Feng +5 more
wiley +1 more source
Chirp spread-spectrum based digital communication under non Gaussian noise channels
, 2016 Bu tezin amacı Gauss olmayan gürültülü kanallar altında güvenli sayısal haberleşmeler kurmak için chirp yaygın bant spektrumun özelliklerini belirlemektir.
ZAFER KARAÇOKAK
core
Simultaneous ToF/FMCW LiDAR Using a Dual‐Mode Light Source in a Single Architecture
Laser &Photonics Reviews, EarlyView.A simultaneous ToF/FMCW LiDAR architecture is demonstrated using a dual‐mode light source that alternately generates optical pulses and frequency‐chirped light within a single acquisition. By combining time‐domain ToF and coherent FMCW ranging, the system achieves high‐resolution ranging and velocity sensing while extending the measurable range beyond ...
Gyeongmin Kweon +5 more
wiley +1 more source
Multispectral Mid‐Infrared Imaging With Incoherent Light via Adiabatic Upconversion
Laser &Photonics Reviews, EarlyView.We demonstrate room‐temperature broadband MIR imaging based on adiabatic frequency upconversion, driven by a Q‐switched pump laser and incoherent illumination. The small‐foot‐print system upconverts the spectral range to the visible domain, without scanning, thermal control and with spatial resolution below 20μm$20\mathrm{\mu}\mathrm{m}$.
Daniel Beitner +4 more
wiley +1 more source
Two‐Photon Endomicroscopy for Image‐Guided Magnetic Micro‐Agents
Small, EarlyView.Image‐guided manipulation of magnetic micro‐agents requires localized fluorescence feedback capable of resolving dynamic interactions in confined environments. This study introduces a two‐photon endomicroscopy platform for real‐time motion tracking, multicolor micro‐agent discrimination, and imaging through biological tissue.
Juan J. Huaroto +3 more
wiley +1 more source
IEEE Open Journal of the Communications SocietyThis paper introduces the orthogonal chirp-frequency-division multiple access (OCFDMA), a technique based on orthogonal chirp-frequency-division multiplexing that partitions the frequency band into independent chirp-based subchannels, referred to as ...
Tulio F. Moreira +2 more
doaj +1 more source
Sound offset responses become highly informative in the auditory cortex
The Journal of Physiology, EarlyView.Abstract figure legend Using large datasets of neural responses to diverse sounds recorded across four stages of the mouse auditory system (depicted and colour‐coded on the left), offset responses occurring after the termination of each sound (time window indicated by the orange shaded area superimposed with activity traces) were characterized and it ...
Charly Lamothe +3 more
wiley +1 more source
Unified waveform design for 6G low-power systems
物联网学报Technologies such as ambient Internet of things (AIoT), low power wide area (LPWA), and low power wake up signal and radio (LP-WUS/WUR) are key enablers for low power system design.
Huang Wei +3 more
doaj