Temat: mobile radio path - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Asynchronous Demodulation Method for Four SSB arranged on Frequency Axis in Mobile Radio Path using Hilbert Transform
Autorzy:: Daikoku, Kazuhiro
Powiązania:: https://bibliotekanauki.pl/articles/1844503.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: asynchronous demodulation
4-SSB
ISB
mobile radio path
Hilbert transform
HF/VHF band telecommunications
tactical communications
underwater communications
Opis:: In this paper, an asynchronous demodulation method for a four-single sideband (SSB) signal arranged on the frequency axis is developed to support burst mode transmission in a mobile radio path and to achieve greater data throughputs. When a reduced pilot carrier is placed at the center of the 4-SSB signal, it is guarded by lower and upper sidebands, that is, this scheme is classified into a tone-in-band (TIB) system. Digital signal processing (DSP) processors are useful for implementing a Hilbert transform. However, we have for a long time neglected introducing it into the demodulation process of SSB signals.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 3; 445-450
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On automatic metric radio map generation for the purpose of WiFi navigation
Autorzy:: Bigaj, P.
Bartoszek, D.
Powiązania:: https://bibliotekanauki.pl/articles/384777.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: indoor positioning
radio map
mobile devices
WiFi fingerprint localization
path planning
Opis:: We present a novel method of fast and reliable data gathering for the purpose of location services based on radio signal strength services such as WiFi location/ navigation. Our method combines the acquisition of location and mapping based on computer vision methods with WiFi signal strength stochastic data gathering. The output of the method is threefold: 3D metric space model, 2D floor plan map and metric map of stochastic radio signal strength. The binding of location data with radio data is done completely automatically, without any human intervention. The advantage of our solution lies also in a significant speed-up and density increase of Radio Map generation which opens new markets for WiFi navigation services. We have proved that presented solution produces a map allowing location in office space of accuracy 1.06 m.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 3; 62-73
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

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