Results 41 to 50 of about 1,050,910 (295)

V-Band Six-Port Interferometer Receiver: High Data-Rate Wireless Applications, BER and EVM Analysis, and CFO Compensation

IEEE Access, 2021
The realization and analysis of an implemented V-band six-port demodulator, operating over 60 GHz band, are presented in this paper. The performance of the design in real-time high-data-rate wireless data transmission is strongly proved using different ...
Mansoor Dashti Ardakani, Serioja Ovidiu Tatu   +1 more
doaj   +1 more source

Experimental Demonstration and Performance Enhancement of 5G NR Multiband Radio over Fiber System Using Optimized Digital Predistortion

Applied Sciences, 2021
This paper presents an experimental realization of multiband 5G new radio (NR) optical front haul (OFH) based radio over fiber (RoF) system using digital predistortion (DPD).
Muhammad Usman Hadi, Muhammad Awais, Mohsin Raza, Muhammad Ikram Ashraf, Jian Song   +4 more
doaj   +1 more source

Neutral interstellar hydrogen in the inner heliosphere under the influence of wavelength-dependent solar radiation pressure [PDF]

, 2007
With the plethora of detailed results from heliospheric missions and at the advent of the first mission dedicated IBEX, we have entered the era of precision heliospheric studies.
Amblard, Baranov, Baranov, Bertaux, Blum, Bzowski, Bzowski, Bzowski, Bzowski, Bzowski, Chabrillat, Costa, Emerich, Fahr, Fahr, Fahr, Fahr, Floyd, Gloeckler, Izmodenov, Izmodenov, Izmodenov, King, Kyrölä, Lallement, Lallement, Lallement, Lallement, Lemaire, M. Bzowski, Malama, McComas, McComas, McComas, McMullin, Osterbart, Quémerais, Quémerais, Rucinski, Rucinski, Rucinski, Rucinski, Rucinski, S. Tarnopolski, Scherer, Scherer, Tarnopolski, Thomas, Thomas, Tobiska, Vasyliunas, Vidal-Madjar, Wilhelm, Witte, Wu   +54 more
core   +3 more sources

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

Nondata-aided error vector magnitude performance analysis over κ−μ shadowed fading channel

Tongxin xuebao, 2018
The performance prediction of wireless system over κ−μ shadowed fading channels was a challenging problem of wireless communications,which affects transmission scheme design seriously.To solve this problem,a novel method of quantifying the κ−μ shadowed ...
Fan YANG, Xiaoping ZENG, Haiwei MAO, Xin JIAN, Derong DU, Xiaoheng TAN, Yiwen GAO   +6 more
doaj   +2 more sources

The Effect of Error Non-Orthogonality on Triple Collocation Analyses

Remote Sensing, 2022
Triple collocation analysis is an established technique for calculating the relative linear intercalibration coefficients and observation error variances for physical quantities measured simultaneously in space and time by three different observation ...
Jur Vogelzang, Ad Stoffelen, Anton Verhoef   +2 more
doaj   +1 more source

Calculation of the Performance of Communication Systems from Measured Oscillator Phase Noise [PDF]

, 2013
Oscillator phase noise (PN) is one of the major problems that affect the performance of communication systems. In this paper, a direct connection between oscillator measurements, in terms of measured single-side band PN spectrum, and the optimal ...
Eriksson, Thomas, Khanzadi, M. Reza, Kuylenstierna, Dan, Panahi, Ashkan, Zirath, Herbert   +4 more
core   +2 more sources

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Evaluation of the effectiveness of combined femtosecond laser-assisted cataract surgery and femtosecond laser astigmatic keratotomy in improving post-operative visual outcomes

BMC Ophthalmology, 2018
Background To determine postoperative refractive and visual outcomes and astigmatic changes after femtosecond laser astigmatic keratotomy in femtosecond laser-assisted cataract surgery (FLACS).
Jing Wang, Jiangyue Zhao, Jun Xu, Jinsong Zhang   +3 more
doaj   +1 more source