Results 21 to 30 of about 2,126 (235)
A Three-Phase Synchronization Algorithm Based on a Modified DSOGI with Adjustable Re-Filtering
Energies, 2023 The precise calculation of phase angle, voltage magnitude and frequency is crucial for the effective control of power electronic inverters connected to an electrical power system.
Gilberto A. Herrejón-Pintor +2 more
doaj +1 more source
IEEE Photonics Journal, 2017 A novel frequency-tunable binary phase-coded microwave signal generator with a tunable frequency multiplication factor is proposed. The key component of the proposed system is a dual-polarization quadrature phase-shift-keying (DP-QPSK) modulator, which ...
Yang Chen, Shilong Pan
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FPGA-Based Digital Lock-in Amplifier With High-Precision Automatic Frequency Tracking
IEEE Access, 2020 Aiming to overcome the problem of the frequency error between the reference signal and the measured signal in an analog lock-in amplifier, this paper presented a digital lock-in amplifier (DLIA) with accurate frequency automatic tracking to improve its ...
Cheng Zhang +3 more
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IEEE Photonics Journal, 2020 Broadband image-reject mixing using a dual-channel polarization-modulated photonic microwave phase shifter is proposed and experimentally demonstrated.
Yamei Zhang +6 more
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Channel Estimation Based on IOTA Filter in OFDM/OQPSK and OFDM/OQAM Systems
Applied Sciences, 2019 In this paper, we present a study of bit error rate (BER) for orthogonal frequency division multiplexing/offset quadrature phase shift keying (OFDM/OQPSK) and OFDM/offset quadrature amplitude modulation (OQAM) systems with an isotropic orthogonal ...
Xiao Zhou, Chengyou Wang, Ruiguang Tang
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The Generalization of Orthogonal Frequency Division Multiplexing With Subcarrier Power Modulation to Quadrature Signal Constellations [PDF]
RS Open Journal on Innovative Communication Technologies, 2020 This research was partly funded by TUBITAK under Grant/Award Number: 119E408.
Hamamreh, Jehad M., Hajar, Abdulwahab
openaire +2 more sources
Re-Investigation of Generalized Integrator Based Filters From a First-Order-System Perspective
IEEE Access, 2016 The generalized integrator (GI)-based filters can be categorized into two types: one is related to quadrature signal generator (QSG), and the other is related to sequence filter (SF).
Zhen Xin +4 more
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IEEE Photonics Journal, 2017 In contrast to traditional free space optical (FSO) systems, the new generation is aimed to be transparent to optical fiber where protocols, high signal bandwidths, and high data rates over fiber are all maintained.
Maged Abdullah Esmail +3 more
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Generation of arbitrary quadrature signals using one dual-drive Modulator [PDF]
Journal of Lightwave Technology, 2005 Regardless of the number of constellation points, all quadrature-amplitude modulation (QAM) signals can be generated using a single dual-drive Mach-Zehnder modulator. When the general method is applied to quadrature-phase-shift-keying (QPSK) signals, three different QPSK transmitters are shown with drive signals having four, three, or two levels.
Ho, Keang-Po, Cuei, Han-Wei
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IEEE Photonics Journal, 2012 We propose a millimeter-wave (MMW) coherent radio-over-fiber (RoF) transmission system for application to an access network with a direct broadband last-mile wireless connection to an optical fiber network.
A. Kanno +7 more
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