Zobrazeno 1 - 10
of 198
pro vyhledávání: '"MPPM"'
Autor:
Shimaa A. El-Meadawy, Hossam M. H. Shalaby, Nabil A. Ismail, Fathi E. Abd El-Samie, Naglaa F. Soliman, Abeer D. Algarni, Walid El-Shafai, Ahmed E. A. Farghal
Publikováno v:
IEEE Access, Vol 10, Pp 10295-10309 (2022)
A hybrid multi-state orbital angular momentum-multi pulse-position modulation ( $N$ OAM-MPPM) scheme over gamma-gamma free-space optical ( ${\Gamma \Gamma }$ -FSO) channel is studied in this paper. In our study, all atmospheric and pointing error imp
Externí odkaz:
https://doaj.org/article/9735b64937d14ae9a2d55f092fd65e20
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Alina Bărbulescu, Florin Postolache
Publikováno v:
Hydrology, Vol 10, Iss 5, p 109 (2023)
In the context of climate change, this article tries to answer the question of whether a correlation exists between the precipitation and temperature series at a regional scale in Dobrogea, Romania. Six sets of time series are used for this aim, each
Externí odkaz:
https://doaj.org/article/a210273a5cec41c7b0327c120de567e7
Publikováno v:
IEEE Photonics Journal, Vol 13, Iss 6, Pp 1-9 (2021)
Nowadays, a high level of security is required for the transmission of critical information. Quantum Key Distribution (QKD) systems are considered the best option to protect such information. Many studies have shown the efficiency of the QKD optical
Externí odkaz:
https://doaj.org/article/0b730ef2c84f4d10a8047a361ca3ddea
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Simbarashe Magidi, Afthab Jabeena
Publikováno v:
Scientific African, Vol 12, Iss , Pp e00777- (2021)
Free space optics (FSO) communication has proved to be a useful technology both in the scientific and commercial domains in response to exponential growth in demand for ultrahigh bandwidth for applications such as urban broadband services, cellular b
Externí odkaz:
https://doaj.org/article/387840d368264c4d8e02b02c5e8f4839
Publikováno v:
Photonics, Vol 9, Iss 5, p 349 (2022)
Turbulence-induced fading is a critical performance degrading factor for underwater wireless optical communication (UWOC) systems. In this paper, we propose a quasi-cyclic (QC) low-density parity-check (LDPC) code with multiple-pulse-position modulat
Externí odkaz:
https://doaj.org/article/57f544554ac14f0c99b4e6cdf0837ab7
Publikováno v:
IEEE Photonics Journal, Vol 10, Iss 3, Pp 1-17 (2018)
In this paper, we propose a multiple pulse position modulation (MPPM) aided reverse polarity optical orthogonal frequency division multiplexing scheme that aims to enhance the spectral efficiency (SE) for dimmable visible light communication (VLC) sy
Externí odkaz:
https://doaj.org/article/42bcb1781b3b45409d4803bb4cef8d45
Publikováno v:
IEEE Access, Vol 6, Pp 77675-77684 (2018)
We design a hybrid visible light (VL) and infrared (IR) data transmission scheme for indoor visible light communication (VLC) systems with multi-pulse position modulation (MPPM) dimming control. A low-power IR light-emitting diode is adopted to assis
Externí odkaz:
https://doaj.org/article/9ffbf416e8b84902beab871f5dd5522f
Publikováno v:
Hydrology, Vol 8, Iss 3, p 125 (2021)
Different methods are known for interpolating spatial data. Introduced a few years ago, the initial version of the Most Probable Precipitation Method (MPPM) proved to be a valuable competitor against the Thiessen Polygons Method, Inverse Distance Wei
Externí odkaz:
https://doaj.org/article/9b3b1448d4ce4dcca8b9aac5b09007f4