Results 21 to 30 of about 2,316 (239)
Performance Limits of Direct Wideband Coherent 3D Localization in Distributed Massive MIMO Systems
Sensors, 2021 We address the accuracy of wideband direct position estimation of a radio transmitter via a distributed antenna array in 5G cellular systems. Our derivations are based only on the presence of spatially coherent line-of-sight (LoS) signal components ...
Nenad Vukmirović +2 more
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Absorption and scintillation effects at 3 mm wavelength on a short line-of-sight radio link
Electronics Letters, 1967 Measurements on a path 150m long, with narrow-beam transmitting and receiving antennas 2m above the ground at one end of the path, and a reflecting plate at the other end, at the same height, have shown attenuation in rain to be about 17dB/km and 8dB/km for rainfall rates of 48mm/h and 7mm/h, respectively. Amplitude variations of up to ±0.4dB can occur
J.A. Lane +2 more
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Учёные записки Казанского университета: Серия Физико-математические наукиUsing a three-dimensional topographic map of a typical microdistrict in Kazan, multipath radio wave propagation in mobile radio communication systems was modeled by the method of ray tracing.
R. F. Khaliullin, A. I. Sulimov
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RIS Assisted Triple-Hop RF-FSO Convergent With UWOC System
IEEE Access, 2022 The convergence of wireless optical communication (WOC) and radio-frequency (RF) systems is a promising technology that overcomes the shortcomings of standalone communication systems.
L. Bhargava Kumar +5 more
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BS-to-Ground Channel Reconstruction With 3D Obstacle Map Based on RSS Measurements
IEEE Access, 2019 As the dependency on wireless services becomes considerably high, it is quite essential to achieve high-quality coverage of wireless signal in real-time. Meanwhile, radio map construction has great significance when realizing reasonable deployment of the
Chenchen Fan, Xiaofeng Zhong, Jie Wei
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Real-Time Vehicular Wireless System-Level Simulation
IEEE Access, 2021 Future automation and control units for advanced driver assistance systems (ADAS) will exchange sensor and kinematic data with nearby vehicles using wireless communication links to improve traffic safety.
Anja Dakic +5 more
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Terahertz Reconfigurable Intelligent Surfaces (RISs) for 6G Communication Links
Micromachines, 2022 The forthcoming sixth generation (6G) communication network is envisioned to provide ultra-fast data transmission and ubiquitous wireless connectivity. The terahertz (THz) spectrum, with higher frequency and wider bandwidth, offers great potential for 6G
Fengyuan Yang +2 more
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Outage probability of cognitive radio-NOMA assisted unmanned aerial vehicles network
CTU Journal of Innovation and Sustainable DevelopmentUnmanned aerial vehicles have been applied and play a critical role in radio surveillance because of their flexibility, mobility, and likely line-of-sight to ground destinations.
Quoc Dan Le +2 more
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MODELLING OF THE FUNCTIONAL UNITS OF THE TRANSMITTING AND RECEIVING RADIO PATHS OF TERAHERTZ
Information and Telecommunication Sciences, 2016 Background. One of the promising applications of terahertz technology are communication systems and telecommunications. In particular, it provides for the creation of fundamentally new in size, noise immunity and energy efficiency devices and ...
Mykhailo Ilchenko +4 more
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Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review
Sensors, 2020 High Frequency (HF) communications through ionospheric reflection is a widely used technique specifically for maritime, aeronautical, and emergency services communication with remote areas due to economic and management reasons, and also as backup system.
Marcos Hervás +2 more
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