Results 31 to 40 of about 1,781,876 (250)

BPSK Circuit Based on SDC Memristor

open access: yesMicromachines, 2022
Digital communication based on memristors is a new field. The main principle is to construct a modulation and demodulation circuit by using the resistance variation characteristics of the memristor.
Ran Gao, Yiran Shen
doaj   +1 more source

PHASE SHIFT INFLUENCE RESEARCH OF THE REFERENCE OSCILLATOR SIGNAL ON THE OUTPUT SIGNAL IN HOMODYNE DEMODULATION SCHEME [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
Subject of Research. Important feature of homodyne demodulation method based on the arctangent function approach is the phase shift between the reference oscillator signal and the interference signal.
A. V. Volkov   +4 more
doaj   +1 more source

Design of communication system for ocean expendable sound velocity meter(XSV)

open access: yesDianzi Jishu Yingyong, 2019
A communication system based on the ocean expendable sound velocity(XSV) was designed and implemented. The 2DPSK signal was used as the transmission signal, and the single double-stranded enameled wire was used as the communication channel.
Fan Hanbai   +3 more
doaj   +1 more source

Twice-FFT demodulation for signal distortion in optical fiber FP acoustic sensor

open access: yesHeliyon, 2020
A Twice-FFT demodulation method for signal distortion state is proposed and experimentally demonstrated in an optical fiber Fabry-Perot (FP) acoustic sensor.
Ningzhe Xing   +3 more
doaj   +1 more source

Digitalized Polarization Fading Suppression and Phase Demodulation Scheme of Phase-Sensitive Optical Time-Domain Reflectometry Based on Polarization Diversity Virtual Coherence

open access: yesPhotonics
In this paper, a digitalized polarization fading suppression and phase demodulation technique for a phase-sensitive optical time-domain reflectometry (φ-OTDR) sensing system utilizing polarization diversity virtual coherence is proposed, in which virtual
Xiatong Wu, An Sun, Yanming Liu, Wei Ji
doaj   +1 more source

Generating Unconventional Spin‐Orbit Torques With Patterned Phase Gradients in Tungsten Thin Films

open access: yesAdvanced Materials, EarlyView.
ABSTRACT A key aim in spintronics is to achieve current‐induced magnetization switching via spin‐orbit torques without external magnetic fields. For this, the focus of recent work has been on introducing controlled lateral gradients across ferromagnet/heavy‐metal devices, giving variations in thickness, composition, or interface quality.
Lauren J. Riddiford   +9 more
wiley   +1 more source

Multi-stages helical gearbox fault detection using vibration signal and Morlet wavelet transform adapted by information entropy difference [PDF]

open access: yes
Although the wavelet analysis is a powerful tool and has been widely used for the vibration signal based gearbox fault diagnosis, there are some limitations that undermine its application.
Gu, Fengshou   +4 more
core   +3 more sources

Une nouvelle classe d'opérateurs de Teager-Kaiser multidimensionnels basée sur les dérivées directionnelles d'ordre supérieur [PDF]

open access: yes, 2013
This work aims at introducing some energy operators linked to Teager-Kaiser energy operator and its associated higher order versions and expand them to multidimensional signals.
CHONAVEL, Thierry   +2 more
core   +1 more source

Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter

open access: yesAdvanced Robotics Research, EarlyView.
A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He   +4 more
wiley   +1 more source

Soft-Bit Assisted Iterative AMR-WB Source-Decoding and Turbo-Detection of Channel-Coded Differential Space-Time Spreading Using Sphere Packing Modulation

open access: yes, 2007
Jointly optimised iterative source- and channel-decoding is used for enhancing the error resilience of the Adaptive Multi Rate WideBand (AMR-WB) speech codec.
Alamri, O.   +8 more
core   +2 more sources

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