Frequency and phase correction for multiplexed edited MRS of GABA and glutathione
Sign Up to like & getrecommendations! Published in 2018 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.27027
Abstract: Detection of endogenous metabolites using multiplexed editing substantially improves the efficiency of edited magnetic resonance spectroscopy. Multiplexed editing (i.e., performing more than one edited experiment in a single acquisition) requires a tailored, robust approach for… read more here.
Keywords: correction multiplexed; correction; frequency phase; phase correction ... See more keywords
Experimental demonstration of optical single sideband signal generation based on multi-frequency phase modulation in optical fibers
Sign Up to like & getrecommendations! Published in 2019 at "Optik"
DOI: 10.1016/j.ijleo.2019.02.012
Abstract: Abstract We theoretically analyzed and experimentally demonstrated the feasibility of optical single sideband (OSSB) signal generation based on multi-frequency phase modulation. The numerically calculated results show that OSSB signal can be efficiently generated with the… read more here.
Keywords: frequency; sideband; phase modulation; frequency phase ... See more keywords
Complex sparse spatial filter for decoding mixed frequency and phase coded steady-state visually evoked potentials
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Neuroscience Methods"
DOI: 10.1016/j.jneumeth.2018.04.001
Abstract: BACKGROUND Mixed frequency and phase coding (FPC) can achieve the significant increase of the number of commands in steady-state visual evoked potential-based brain-computer interface (SSVEP-BCI). However, the inconsistent phases of the SSVEP over channels in… read more here.
Keywords: mixed frequency; frequency; frequency phase; steady state ... See more keywords
Frequency and phase relations of entangled photons observed by a two-photon interference experiment
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.100.023850
Abstract: An entangled photon experiment has been performed with a large variation of the temperature of the non-linear crystal generating the entangled pair by spontaneous downconversion. The photon pairs are separated by a nonpolarizing beamsplitter, and… read more here.
Keywords: entangled photons; two photon; temperature; interference ... See more keywords
Multi-Frequency Phase-Coded Microwave Signal Generation With an Increased Number of Frequencies
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Photonics Technology Letters"
DOI: 10.1109/lpt.2020.3006881
Abstract: A photonics-based approach to multi-frequency phase-coded microwave signal generation is proposed with an increased number of frequencies. Two microwave reference signals are sent to one arm of a dual-drive Mach-Zehnder modulator (DD-MZM), whereas the binary… read more here.
Keywords: coded microwave; multi frequency; frequency; phase coded ... See more keywords
Frequency-Phase Decoupling Method for Carrier Synchronization in Space Communications
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2019.2916854
Abstract: In space communications, there exist two prominent issues: large Doppler spread and limited pilot resources, which will result in poor performance for a pilot-aided (PA) traditional carrier synchronization mode (TCSM) with serial processing. In view… read more here.
Keywords: frequency phase; carrier synchronization; carrier; space communications ... See more keywords
Generalized Multistream Spatial Modulation Based on Frequency-Phase Modulated Signals
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2022.3144438
Abstract: In this letter, we present an approach to building a new generalized multistream spatial modulation system (GMSM), where the information is conveyed by the two active antennas with signal indices and using all possible active… read more here.
Keywords: generalized multistream; multistream spatial; spatial modulation; frequency phase ... See more keywords
Hybrid-Frequency Phase-Shift PWM Technique to Reduce DC-Side and AC-Side High Frequency Current Harmonics in PMSM Drives
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Power Electronics"
DOI: 10.1109/tpel.2024.3394489
Abstract: The presence of current harmonics on both ac-side and dc-side is undesired for voltage source inverters feeding permanent magnet synchronous motor systems. This article presents a hybrid-frequency phase-shift pulse width modulation (HFPSPWM) method to mitigate… read more here.
Keywords: current harmonics; side; harmonics; frequency phase ... See more keywords
Phase-locked loops in acoustic analysis
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.4988842
Abstract: Tracking of signal frequency and/or phase is made much more challenging by the presence of “rapid” frequency or phase changes in a signal—occurring in a time short compared to the amount of frequency shift: Δf×Δt read more here.
Keywords: phase; frequency; analysis; frequency phase ... See more keywords
Time-Frequency Phase Retrieval for Deconvolutive Short-Time Fourier Transform
Sign Up to like & getrecommendations! Published in 2024 at "GEOPHYSICS"
DOI: 10.1190/geo2023-0563.1
Abstract: Cohen class distributions are well-known time-frequency distributions that have been widely used to analyze different signals. However, they are impractical for signal filtering as they only provide amplitude spectra and suffer from cross-term. In this… read more here.
Keywords: time; phase retrieval; time frequency; frequency phase ... See more keywords
Three-dimensional frequency- and phase-multiplexed magneto-optical microscopy.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.033942
Abstract: We describe a new approach to scanning magneto-optical Kerr effect (MOKE) microscopy in which two opto-mechanical choppers modulate the spatial profile of a probe laser beam to separately encode all three magnetization components at different… read more here.
Keywords: three dimensional; microscopy; dimensional frequency; phase multiplexed ... See more keywords