Results 51 to 60 of about 3,377 (112)

Toward a Dynamic Model for Topside Ionospheric Irregularities: Spherical Harmonic Decomposition

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Ionospheric irregularities arise from highly dynamic and turbulent processes related to magnetosphere‐ionosphere coupling and can lead to electromagnetic signal distortion or loss of lock events in global navigation satellite system signals, representing a hazard associated with space weather events. For this reason, understanding and modeling
S. Mestici, P. De Michelis, G. Consolini, A. Pignalberi, R. Tozzi, F. Giannattasio, F. Berilli   +6 more
wiley   +1 more source

Machine Learning‐Ready Data Sets for the Analysis and Nowcasting of Atmospheric Radiation at Aviation Altitudes

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Nowcasting and forecasting of the radiation environment in the Earth's lower atmosphere are critical for the safety of aircraft and spacecraft crews and passengers. Currently, this problem is addressed by employing statistical and physics‐based models that take into account particle transport and precipitation.
V. M. Sadykov, Z. M. Watkins, D. Kempton, W. Jones, S. K. C, G. T. Goodwin, X. He, W. K. Tobiska, I. Kitiashvili, C. Mertens, S. Ranjan, D. G. Deardorff, R. Spaulding   +12 more
wiley   +1 more source

Zero forcing based sphere decoder for generalized spatial modulation systems

ETRI Journal, 2019
To reduce the number of radio frequency (RF) chains in multiple input multiple output (MIMO) systems, generalized spatial modulation (GSM) techniques have been proposed in the literature.
Sara Jafarpoor, Majid Fouladian, Mohammad Neinavaie   +2 more
doaj   +1 more source

Spectral Efficient Spatial Modulation Techniques

IEEE Access, 2019
Space modulation techniques (SMTs) have emerged as promising candidates for spectral- and energy-efficient wireless communication systems since they strike a good balance among error performance, power efficiency, spectrum efficiency, and receiver ...
Hany S. Hussein, Mohamed Elsayed, Usama Sayed Mohamed, Hamada Esmaiel, Ehab Mahmoud Mohamed   +4 more
doaj   +1 more source

Space-Time Coded Spatial Modulated Physical Layer Network Coding for Two-Way Relaying

, 2014
Using the spatial modulation approach, where only one transmit antenna is active at a time, we propose two transmission schemes for two-way relay channel using physical layer network coding with space time coding using Coordinate Interleaved Orthogonal ...
Rajan, B. Sundar, Unnikrishnan, K. G.
core   +1 more source

The SAMPLE Experiment and Weak Nucleon Structure [PDF]

, 2004
One of the key elements to understanding the structure of the nucleon is the role of its quark-antiquark sea in its ground state properties such as charge, mass, magnetism and spin.
Abbott, Abbott, Afanasev, Ahrens, Airepetian, Akhiezer, Akhiezer, Alarcon, Aniol, Aniol, Aniol, Anklin, Anthony, Arnold, Arrington, Arrington, Arrington, Arrington, Arrington, Averett, Baer, Barkhuff, Beane, Beck, Beck, Beck, Beise, Bennett, Bergstrom, Bergstrom, Bermuth, Bernard, Blunden, Bruins, Budd, Cahn, Carlson, Castorina, Chen, Chen, Cheng, Christy, D.T. Spayde, Davidson, Desplanques, Diaconescu, Dmitrasinovic, Dombey, Dong, E.J. Beise, Erler, Farkhondeh, Filippone, Forkel, Gao, Gao, Garvey, Gasser, Gayou, Geiger, Goncharov, Guichon, Hadjimichael, Hagiwara, Halzen, Hammer, Hammer, Hammer, Hammer, Hammer, Hannelius, Hannelius, Hasty, Hauger, Haxton, Heil, Hemmert, Hwang, Höhler, Ito, Jaffe, Jones, Kaplan, Kim, Koepf, Kubon, Kuchto, Kumar, Kumar, Kurylov, Lai, Leinweber, Levchuk, Lewis, Lewis, Li, Liesenfeld, Liu, Lyubovitskij, M.L. Pitt, Madey, McKeown, Mergell, Miller, Miller, Mitchell, Mo, Mueller, Musolf, Musolf, Musolf, Musolf, Musolf, Olsen, Olsson, Ostrick, Park, Park, Pasquini, Pate, Pavan, Pollock, Prescott, Punjabi, Ramsey-Musolf, Ramsey-Musolf, Ramsey-Musolf, Sainio, Schiavilla, Schiavilla, Silva, Silva, Silva, Silva, Souder, Spayde, Spayde, van de Wiele, Warren, Weigel, Wells, Wiringa, Wright, Xu, Xu, Zeller, Zhu   +146 more
core   +1 more source

Harnessing Data for Flood Prediction: A Systematic Review of Forecasting Techniques and Information Sources

Journal of Flood Risk Management, Volume 19, Issue 1, March 2026.
ABSTRACT Flood forecasting has undergone significant development over the past two decades, with researchers exploring a range of innovative approaches to quantify both the hazards and risks associated with flood events across a range of magnitudes and frequencies.
Amirali Davary, Pete Melville‐Shreeve, Richard Brazier, Albert S. Chen   +3 more
wiley   +1 more source

Covert Information Mapped Generalized Spatial and Direction Modulation toward Secure Wireless Transmission

Sensors
In this paper, for the sake of enhancing the security of wireless transmission, we proposed a novel system based on spatial and direction modulation (SDM) combined with generalized spatial modulation (GSM) which is aided by covert information mapping ...
Yuan Zhong, Zhengyu Ji, Xianglu Li, Peng Fei, Dong Hou, Zhigang Wang, Jie Tian   +6 more
doaj   +1 more source

Longitudinal Variability of Pre‐Midnight Equatorial Plasma Bubbles Under Disturbed Geomagnetic Conditions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Equatorial plasma bubbles (EPBs) pose significant challenges to trans‐ionospheric radio communication and navigation systems. Because of their disruptive effects, evaluating and predicting them is key for the development of space systems. The influence of geomagnetic activity on EPBs remains unclear, partly due to limited low‐latitude neutral ...
Gilda de Lourdes González, Thomas J. Immel, Yen‐Jung Wu, L. Claire Gasque, Brian J. Harding, Colin Triplett, Cesar E. Valladares   +6 more
wiley   +1 more source

From Denoising to Compressed Sensing

, 2016
A denoising algorithm seeks to remove noise, errors, or perturbations from a signal. Extensive research has been devoted to this arena over the last several decades, and as a result, today's denoisers can effectively remove large amounts of additive ...
Baraniuk, Richard G., Maleki, Arian, Metzler, Christopher A.   +2 more
core   +1 more source