Results 31 to 40 of about 940,971 (329)
Study of millimeter wave phase shift in 40 GHz hybrid mode locked lasers [PDF]
, 2009 An investigation into using hybrid mode-locked lasers to implement millimeter wave phase shift is presented. The phase shift is measured directly using a vector network analyzer enabling straightforward characterization of such systems.
Cryan, MJ, Khawaja, BAM
core +2 more sources
PERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING WITH DIFFERENT MODULATION TECHNIQUES [PDF]
ICTACT Journal on Communication Technology, 2012 MIMO Diversity is the technique which takes the advantage of multipath and mitigates the effect of fading and increases signal strength. Space Time Block code (STBC) is used in Multiple Input Multiple Output (MIMO) system to improve the performance by ...
Shubhangi Chaudhary, A.J. Patil
doaj
PLoS ONE, 2020 This research aims to analyze the effects of different parameter estimation on the recognition performance of satellite modulation signals based on deep learning (DL) under low signal to noise ratio (SNR) or channel non-ideal conditions.
Hui Li, Ming Li
doaj +1 more source
25 Gbit/s differential phase-shift-keying signal generation using directly modulated quantum-dot semiconductor optical amplifiers [PDF]
, 2015 This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 106, 213501 (2015) and may be found at https://doi.org/10.1063/1.4921785.Error-free
Bimberg, Dieter +6 more
core +1 more source
Short-range ultrasonic communications in air using quadrature modulation [PDF]
, 2009 A study has been undertaken of ultrasonic communications methods in air, using a quadrature modulation method. Simulations were first performed to establish the likely performance of quadrature phase shift keying over the limited bandwidth available in ...
Green, Roger, Hutchins, David A., Li, C.
core +1 more source
Modulation Instability and Phase-Shifted Fermi-Pasta-Ulam Recurrence [PDF]
Scientific Reports, 2016 AbstractInstabilities are common phenomena frequently observed in nature, sometimes leading to unexpected catastrophes and disasters in seemingly normal conditions. One prominent form of instability in a distributed system is its response to a harmonic modulation.
Kimmoun, O. +11 more
openaire +10 more sources
A Survey on Robust Modulation Requirements for the Next Generation Personal Satellite Communications
Frontiers in Communications and Networks, 2022 The unrelenting technological advancement in the generation of wireless networks in recent years has awakened the motion concerning the inclusion of satellites in personal communications.
Julius Ssimbwa +3 more
doaj +1 more source
IEEE transactions on industrial electronics (1982. Print), 2020 Aim to improve the power efficiency of the dual-active-bridge (DAB) dc–dc converter, an efficiency optimization scheme with triple-phase-shift (TPS) modulation using reinforcement learning (RL) is proposed in this article.
Yuanhong Tang +6 more
semanticscholar +1 more source
Ultrasonic Modulation of Coherent Light in Raman–Nath Diffraction
IEEE Photonics Journal, 2018 This paper analyzes the ultrasonic modulation of coherent light in Raman–Nath acousto-optic diffraction. We find that the frequency shifts of the diffracted light cause the periodic variation of the ultrasound-modulated light intensity with time ...
Weng Cuncheng, He Youwu
doaj +1 more source
Solving Doppler-Angle Ambiguity of BPSK-MIMO FMCW Radar System
IEEE Access, 2021 In a multiple-input multiple-output (MIMO) radar system, binary phase-shift keying (BPSK) modulation is widely used to separate signals transmitted from multiple transmit (Tx) antennas.
Jaehoon Jung +3 more
doaj +1 more source