Results 71 to 80 of about 178,553 (293)

Nonlinear distortion analysis for multisine excitation constrained by power spectral density

Journal of Measurement Science and Instrumentation, 2016
Nonlinear distortion introduced by an amplifier when subjected to a multisine excitation decreases the measurement accuracy in many metrological and measurement areas.In this paper,we performed qualitative and quantitative analyses of the nonlinear ...
ZHOU Kun-li, QU Ji-feng, ZHOU Zhen-yu
doaj  

Adaptive Pre-Distortion Compensation for LED Nonlinear Distortion in VLC-OFDM Systems Using Frequency Symbol Spreading

Applied Sciences
This paper proposes an adaptive pre-distortion method for mitigating LED nonlinear distortion in Visible Light Communication (VLC)-OFDM systems. The inherent nonlinear characteristics of LEDs disrupt the orthogonality among OFDM subcarriers, causing ...
Koichi Seimiya, Ren Oshima, Geonuk Kang, Chang-Jun Ahn   +3 more
doaj   +1 more source

Reactive Current Reshaping With Series Resonance Damping for Three-Phase Buck-Type Dynamic Capacitor

IEEE Access, 2019
By adding Buck-type AC/AC converter to conventional power capacitor, dynamic capacitor (D-CAP) can be formed to compensate variable rather than fixed reactive power.
Qi Wu, Ke Dai, Xinwen Chen, Yuxiao Zhang, Chen Xu, Ziwei Dai   +5 more
doaj   +1 more source

Impact of Spatial Filtering on Distortion from Low-Noise Amplifiers in Massive MIMO Base Stations

, 2018
In massive MIMO base stations, power consumption and cost of the low-noise amplifiers (LNAs) can be substantial because of the many antennas. We investigate the feasibility of inexpensive, power efficient LNAs, which inherently are less linear.
Eriksson, Thomas, Gustavsson, Ulf, Larsson, Erik G., Mollén, Christopher   +3 more
core   +1 more source

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

Advanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan, Joe Sunny, Tamer Karaman, Reshma Peremadathil‐Pradeep, Emily Darwin, Felix Büttner, Dieter Suess, Hans Josef Hug, Manfred Albrecht   +8 more
wiley   +1 more source

Control device nonlinear distortion radioelement

VESTNIK of Samara University. Aerospace and Mechanical Engineering, 2014
Considered control device radioelements nonlinear distortion in the transmission path and the amplification of electrical signals. On the causes of non-linear distortion. Given the composition of the control device and communication between its units. Shows the process of converting radio signals. The device provides higher selectivity and precision of
G. P. Shopin, S. V. Tyulevin, M. N. Piganov, A. V. Nasedkin   +3 more
openaire   +2 more sources

Redshift-space Distortions of the Power Spectrum of Cosmological Objects on a Light Cone : Explicit Formulations and Theoretical Implications [PDF]

, 1999
We examine the effects of the linear and the cosmological redshift-space distortions on the power spectrum of cosmological objects on a light cone. We develop theoretical formulae for the power spectrum in linear theory of density perturbations in a ...
Ballinger W. E., Cole S., Hiroaki Nishioka, Kaiser N., Kazuhiro Yamamoto, Kodama H., Matarrese S., Matsubara T., Suto Y., Suto Y.   +9 more
core   +3 more sources

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

Advanced Functional Materials, EarlyView.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar, Jorge Marqués‐Marchán, Sara Catalano, Agustina Asenjo, Michael Foerster, Miguel Angel Niño, Manuel Vazquez, Fèlix Casanova, Arantxa Fraile Rodríguez, Rafael P. Del Real, Oksana Chubykalo‐Fesenko, Cristina Bran   +11 more
wiley   +1 more source

Hyperbolic splines and nonlinear distortion

IEEE Transactions on Signal Processing, 2000
Using Mobius transformations, we consider how to interpolate a set of monotone increasing data points (x/sub k/, y/sub k/) so that the interpolant is a smooth invertible function and that the interpolant and its inverse have the same simple functional form. We use our method to cancel jammer-induced distortion in a nonlinear channel.
R. Martin, K. Lever, J. McCarthy
openaire   +3 more sources