A new unequal three-tone signal method for AM-AM and AM-PM distortion measurements suitable for characterization of satellite communication transmitters/transponders

2000 ◽  
Vol 48 (8) ◽  
pp. 1404-1407 ◽  
Author(s):  
F.M. Ghannouchi ◽  
H. Wakana ◽  
M. Tanaka
Keyword(s):  
Satellite Communication ◽  
Tone Signal ◽  
Signal Method

scholarly journals Characterization of Ionospheric Scintillation Index over Low Latitude: Nepal Region

2020 ◽  
Author(s):  
Kutubuddin Ansari ◽  
Tae-Suk Bae ◽  
Punyawi Jamjareegulgarn ◽  
Shakera Khan ◽  
Soo-Hyeon Lim
Keyword(s):  
Satellite Communication ◽  
Scintillation Index ◽  
Ionospheric Scintillation ◽  
Small Scale ◽  
Low Latitude ◽  
Rapid Phase ◽  
Global Positioning ◽  
Low Latitudes ◽  
Communication Space

The ionospheric scintillation is a rapid phase and amplitude fluctuation of satellite signals due to the small-scale irregularity of electron density in the ionosphere. The characterization of the scintillation index in a proper way is a crucial aspect of the Global Positioning System (GPS) satellite signals for the purpose of space-based navigation, satellite communication, space weather as well as earth observation applications. In the current study, we analyzed the ionospheric scintillation index during the year of 2018 to 2019 over the Nepal region which locates itself almost being sandwiched between India and China and in the vicinity of low latitudes. The characteristic variations of scintillation occurrence are studied during the several geomagnetic storm and quiet days. The results show that the S4 indexes are varying from the 0.05 to 0.45 during the whole year. The S4 indexes behave higher variations during the whole day in the starting of the year and start to decrease at end of the day as well as at the ending months of the year 2019. The S4 values become completely less during the sunset time, while they have higher values during the sunrise. Especially, the S4 index during the storm days are larger than during the quiet days. It is worthy to note that the variations of S4 index studied in this current study do not follow the sunset property during the year of 2019. Consequently, the causes should be discovered and discussed additionally in the next research paper.

scholarly journals SPATIAL CHARACTERIZATION OF TELECOMMUNICATION SATELLITES VISIBLE ABOVE THE REPUBLIC OF SERBIA

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Slaviša Đukanović ◽  
Vladimir Mladenović ◽  
Milan Gligorijević ◽  
Danijela Milošević ◽  
Ivona Radojević Aleksić
Keyword(s):  
Satellite Communication ◽  
Base Station ◽  
Satellite Telecommunication ◽  
High Speeds ◽  
Satellite Télécommunication ◽  
Telecommunication Infrastructure ◽  
Orbital Position ◽  
The Republic ◽  
The City

This paper deals with the general technical, spatial, and temporal characteristics of satellite telecommunications systems. Particular attention was paid to the peculiarities of the territory of the Republic of Serbia in terms of implementation and use of modern satellite telecommunication infrastructure. The overview shows how and on which way to use various satellite telecommunication systems to configure and exploit next-generation networks, especially modern communications such as 5G technology and IoT. Their work cannot be imagined without the high speeds and high frequencies that allow us to transmit a wealth of information - from short messages/news to HD video on a mobile phone. We need either a base station network or in the case of the high seas or areas where the base station system is difficult to imagine, we need satellite communication. The paper presents data that give a numerical and graphical overview of geostationary satellites visible from the territory of the city of Belgrade, depending on the orbital position and the associated angle of azimuth and elevation, which would also be valid for the leading territory of Serbia.

Channel Modelling and Characterization of Mobile Satellite Communication Systems

2009 ◽  
Author(s):  
Abbas Mohammed ◽  
Ajayi Seun ◽  
Zhe Yang ◽  
Maria Erman ◽  
Tommy Hult ◽  
...  
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Channel Modelling ◽  
Mobile Satellite ◽  
Mobile Satellite Communication

Characterization of nitride hole lateral transport in a charge trap flash memory by using a random telegraph signal method

2017 ◽  
Vol 111 (3) ◽  
pp. 033501 ◽  
Author(s):  
Yu-Heng Liu ◽  
Cheng-Min Jiang ◽  
Hsiao-Yi Lin ◽  
Tahui Wang ◽  
Wen-Jer Tsai ◽  
...  
Keyword(s):  
Flash Memory ◽  
Lateral Transport ◽  
Random Telegraph Signal ◽  
Charge Trap ◽  
A Charge ◽  
Signal Method

Linearity characterization of RF circuits through an unequally spaced multi-tone signal

2016 ◽  
Author(s):  
Sylvain Laurent ◽  
Jean Pierre Teyssier ◽  
Raymond Quere ◽  
Jacques Sombrin ◽  
Michel Prigent
Keyword(s):  
Rf Circuits ◽  
Unequally Spaced ◽  
Tone Signal
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