Results 21 to 30 of about 623,711 (334)
High-Frequency Modulation Spectroscopy with a THz Quantum-Cascade Laser [PDF]
, 2013 A terahertz absorption spectrometer with a quantum-cascade laser (QCL) for high-resolution molecular spectroscopy is realized. The spectrometer is based on highfrequency (up to 50 MHz) modulation of the QCL frequency.
H.-W. Hubers +11 more
core +1 more source
Research on the Performance Boundaries and Improvement Strategies of Oscillation Suppression in Continuously Adjustable Phase-Shifting Transformer [PDF]
Dianli jianshe[Objective] To enhance the sub-synchronous oscillation suppression capability under high proportion of power electronic equipment conditions in power grids， promote the application of continuous tunable phase shifters in power flow regulation and ...
DU Jingyan, CHEN Junjie, LIN Jinjiao, WANG Chuyang
doaj +1 more source
CPM-OFDM Performance over Underwater Acoustic Channels
Journal of Marine Science and Engineering, 2021 We propose and evaluate the performance of a continuous phase modulation based orthogonal frequency division multiplexing (CPM-OFDM) transceiver for underwater acoustic communication (UAC).
Imran A. Tasadduq +2 more
doaj +1 more source
Pre-Equalization for Continuous Phase Modulation
IEEE Transactions on Wireless Communications, 2011 In this paper, a channel precoding technique is proposed for M-ary continuous phase modulation (CPM) for multipath downlink channels. The proposed pre-equalizer, based on the approximation of CPM signals by complex exponential functions, applies modulo-arithmetic operations to ensure the stability as in Tomlinson-Harashima method.
Oezguel, Baris +3 more
openaire +2 more sources
INCREASING THE SPECIFIC RATE OF CONTINUOUS PHASE MODULATION SIGNALS
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2019 A method has been developed for increasing the specific rate of frequency modulation signals with a continuous phase based on the use of the properties of composite Walsh-Barker sequences.
Victor Banket, Sergei Manakov
doaj +1 more source
Spatially coupled turbo-coded continuous phase modulation: asymptotic analysis and optimization
EURASIP Journal on Wireless Communications and Networking, 2020 For serially or parallel concatenated communication systems, spatial coupling techniques enable to improve the threshold of these systems under iterative decoding using belief propagation (BP).
Tarik Benaddi, Charly Poulliat
doaj +1 more source
Significantly fast spinodal decomposition and inhomogeneous nanoscale martensitic transformation in Ti–Nb–O alloys [PDF]
MATEC Web of Conferences, 2020 The β phase spinodal decomposition during continuous cooling in Ti‒Nb‒O alloys is investigated by the phase-field method. Addition of only a few at.%O to Ti‒23Nb (at.%) alloy remarkably increases the driving force of the β phase spinodal decomposition ...
ISHIGURO Yuya +2 more
doaj +1 more source
Strong modulation instability in a silicon–organic hybrid slot waveguide [PDF]
, 2015 In this paper, we investigate the strong modulation instability (MI) at telecommunication band in a silicon-organic hybrid slot waveguide. The organic material of polymer poly (bis para-toluene sulfonate) of 2, 4-hexadiyne 1, 6 diol (PTS), which has high
Kang, Z +17 more
core +1 more source
Applied Sciences, 2023 In this paper, continuous phase modulation-generalized frequency division multiplexing (CPM-GFDM) is proposed. The performance of CPM-GFDM is evaluated over Gaussian and frequency selective fading channels.
Imran A. Tasadduq
doaj +1 more source
A New Exact Low-Complexity MMSE Equalizer for Continuous Phase Modulation
IEEE Communications Letters, 2018 This letter introduces a new low-complexity frequency-domain equalizer for continuous phase modulations (CPM). The derivation of a fractionally spaced representation for circular block-based CPM leads, without any approximation, to a simple yet efficient
Romain Chayot +5 more
semanticscholar +1 more source