Results 91 to 100 of about 43,924 (217)

Assessment of Ionospheric Model Performance Over the US During the Extreme G5 2024 Mother's Day Geomagnetic Storm

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study evaluates 17 ionospheric models' performance over the Continental United States (CONUS) during the 2024 Mother's Day geomagnetic storm, using ground‐based GNSS Total Electron Content (TEC) and single‐frequency (SF) precise Single Point Positioning (SPP) technique. The storm produced significant positive storm effects during its main
Min‐Yang Chou, Jia Yue, Deimos Ibáñez Segura, J. D. Huba, Tzu‐Wei Fang, Charles Lin, Chi‐Yen Lin, Aaron Bukowski, Aaron Ridley, Ivan Galkin, Dieter Bilitza, Jack Wang, Mohammed Mainul Hoque, Maksym Petrenko, Paul Dimarzio, Maria M. Kuznetsova   +15 more
wiley   +1 more source

Millimeter‐Wave Antennas: A Comprehensive State‐of‐the‐Art Review of Design Approaches, Operating Bands, Challenges, and Applications in Body‐Centric and Emerging Systems

Radio Science, Volume 61, Issue 5, May 2026.
Abstract This paper reviews and classifies more than 120 recent contributions on millimeter‐wave (mm‐wave) antennas, with emphasis on their operating bands, design methods, and application domains. It surveys the main mm‐wave frequency ranges and their use in 5G/6G communications, radar and sensing, biomedical and body‐centric systems, imaging, and ...
Sarra Khacha, Chemseddine Zebiri, Mohammad Alibakhshikenari, Djamel Sayad, Issa Elfergani, Muhammad Akmal Chaudhary, Nisar Ahmad Abbasi, Arpan Desai, Jonathan Rodriguez, Takfarinas Saber, Ernesto Limiti   +10 more
wiley   +1 more source

An extension of the RiMAX multipath estimation algorithm for ultra-wideband channel modeling

EURASIP Journal on Wireless Communications and Networking, 2018
This work presents an extension of the high-resolution RiMAX multipath estimation algorithm, enabling the analysis of frequency-dependent propagation parameters for ultra-wideband (UWB) channel modeling. Since RiMAX is a narrowband algorithm, it does not
Brecht Hanssens, Emmeric Tanghe, Davy P. Gaillot, Martine Liénard, Claude Oestges, David Plets, Luc Martens, Wout Joseph   +7 more
doaj   +1 more source

Alternative Approach for Combination of Fingers in Underwater Acoustic Communication

International Journal of Distributed Sensor Networks, 2016
An underwater acoustic communication channel is time varying and has multipath propagation with bottom and surface reflection. A rake receiver has time diversity effects in multipath propagation environments.
Ji-Hong Son, Eun-Hye Jeon, Ki-Man Kim, Dong-Won Lee, Tae-Doo Park   +4 more
doaj   +1 more source

Multipath Propagation of Acoustic Signal in a Swimming Pool-Source Localization Problem. [PDF]

Sensors (Basel), 2022
Misiurewicz J, Bruliński K, Klembowski W, Kulpa KS, Pietrusiewicz J.   +4 more
europepmc   +1 more source

Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

IEEE Access
Underwater wireless communication remains a challenging topic, particularly for applications such as wreck penetration where multipath and Doppler effects are very intense.
Agnieszka Czapiewska, Andrzej Luksza, Ryszard Studanski, Lukasz Wojewodka, Andrzej Zak   +4 more
doaj   +1 more source

Radio Channel Capacity with Directivity Control of Antenna Beams in Multipath Propagation Environment. [PDF]

Sensors (Basel), 2021
Ziółkowski C, Kelner JM, Krygier J, Chandra A, Prokeš A.   +4 more
europepmc   +1 more source

On OFDM Ranging Performance Degradation in Multipath Scenarios: Bias and Misspecified Cramér–Rao Bounds

IEEE Access
Multipath propagation represents a dominant error source limiting the accuracy of radio-based ranging and positioning in urban environments. Conventional ranging estimators typically estimate only the range of the first arriving path while neglecting the
Lucas Alvarez Navarro, Christian C. J. M. Tiberius, Gerard J. M. Janssen   +2 more
doaj   +1 more source

Spatial Identification Methods and Systems for RFID Tags [PDF]

, 2013
Disertační práce je zaměřena na metody a systémy pro měření vzdálenosti a lokalizaci RFID tagů pracujících v pásmu UHF. Úvod je věnován popisu současného stavu vědeckého poznání v oblasti RFID prostorové identifikace a stručnému shrnutí problematiky ...
Povalač, Aleš
core  

Multipath Multiplexing for Capacity Enhancement in SIMO Wireless Systems

, 2017
This paper proposes a novel and simple orthogonal faster than Nyquist (OFTN) data transmission and detection approach for a single input multiple output (SIMO) system. It is assumed that the signal having a bandwidth $B$ is transmitted through a wireless
Bogale, Tadilo Endeshaw, Le, Long Bao, Vandendorpe, Luc, Wang, Xianbin   +3 more
core   +1 more source