Zobrazeno 1 - 10
of 421
pro vyhledávání: '"Angular spread"'
Autor:
Suo Tang
Publikováno v:
Physics Letters B, Vol 859, Iss , Pp 139136- (2024)
The quantum electrodynamic (QED) theory predicts the photon emission and pair creation involved in QED cascades occur mainly in a forward cone with finite angular spread Δθ∼1/γi along the momenta of incoming particles. This finite beaming effect
Externí odkaz:
https://doaj.org/article/c302f7034d3c45c5a086ac69863a3a09
Autor:
Dipankar Shakya, Mingjun Ying, Theodore S. Rappaport, Hitesh Poddar, Peijie Ma, Yanbo Wang, Idris Al-Wazani
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 5, Pp 5192-5218 (2024)
Wide bandwidth requirements for multi-Gbps communications have prompted the global telecommunications industry to consider new mid-band spectrum allocations in the 4–8 GHz FR1(C) and 7–24 GHz FR3 bands, above the crowded bands below 6 GHz. Alloca
Externí odkaz:
https://doaj.org/article/21e39a559792424ab8174e3b9629e943
Autor:
Sudhanshu Arya, Yeon Ho Chung
Publikováno v:
ICT Express, Vol 9, Iss 6, Pp 1013-1018 (2023)
By leveraging the characteristics of both quantum encoding and classical data channel, we present a unique and novel multiuser optical communication system that utilizes fascinating properties of the structured light for information transmission. Spe
Externí odkaz:
https://doaj.org/article/6386c63e1a734d7cb053a3f546ab71c3
Akademický článek
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Akademický článek
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Publikováno v:
IEEE Access, Vol 10, Pp 7196-7206 (2022)
The International Electrotechnical Commission (IEC) develops and validates methods for assessing radio frequency electromagnetic field (RF EMF) exposure due to base stations (BS). When the assessment is performed in- situ, it is recommended to extrap
Externí odkaz:
https://doaj.org/article/d1e252b2c27440ca895f960377d1c0ff
Autor:
Satoshi Ito, Takahiro Hayashi
Publikováno v:
IEEE Access, Vol 10, Pp 26242-26256 (2022)
New specific scenarios are expected for 5G systems in various environments, such as stadiums, subway platforms, factories, livestock barns. On the other hand, the applicability of conventional propagation models to new specific environments has not b
Externí odkaz:
https://doaj.org/article/744202a7659d4e79ad33f84e761d4f90
Publikováno v:
IEEE Access, Vol 8, Pp 211585-211594 (2020)
The 5th generation of mobile communication system (5G) enables the use of millimeter wave frequency bands and beamforming with narrow-beam directional antennas for mobile communication. Accurate estimation of radio link budget which enables direct as
Externí odkaz:
https://doaj.org/article/073ad4b6a1fe47b79b9979a294ce6ebd
Publikováno v:
IEEE Access, Vol 7, Pp 48961-48970 (2019)
We consider the problem of channel estimation for millimeter wave (mmWave) systems, where both the base station and the mobile station employ a single radio frequency (RF) chain to reduce the hardware cost and power consumption. Recent real-world cha
Externí odkaz:
https://doaj.org/article/3984fcfd76fc44678b04b4e8c7dda062
Publikováno v:
IEEE Access, Vol 7, Pp 151558-151568 (2019)
This paper presents a measurement-based analysis of wideband 39 GHz millimeter wave (mm-wave) dual-polarized propagation channel under the impact of foliage presence between a transmitter (Tx) and a receiver (Rx). The measurements were conducted in a
Externí odkaz:
https://doaj.org/article/418d10336be54c60a3531c1c41f85e84