LoRa-like CSS-based PHY layer, Capture Effect and Serial Interference Cancellation

Konferenz: European Wireless 2018 - 24th European Wireless Conference
02.05.2018 - 04.05.2018 in Catania, Italy

Tagungsband: European Wireless 2018

Seiten: 6Sprache: EnglischTyp: PDF

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Autoren:
Noreen, Umber; Bounceur, Ahcene (Lab-STICC-UMR CNRS 6285, Universite de Bretagne Occidentale, Brest, France)
Clavier, Laurent (IEMN UMR CNRS 8520, Telecom IRCICA FR CNRS 3024, Lille, France)

Inhalt:
Long Range communications are taking an important place in the IoT world. One Physical Layer solution is LoRa. It is based on Chrip Spread Spectrum. In this paper, we review how this modulation technique carries information. However, a simple MAC layer, like ALOHA, will rapidly limit the capacity (in term of number of users) of such networks. However, sensing the channel will not resolve the collision problem because of the very wide coverage of access points. We study how capture effect and even more serial interference cancellation can drastically improve the performance. The position randomness of transmitters can allow to correctly decode simultaneous transmissions.