Decentralized Power Control for Slotted Spread Spectrum Aloha with Successive Interference Cancellation
Conference: SCC 2017 - 11th International ITG Conference on Systems, Communications and Coding
02/06/2017 - 02/09/2017 at Hamburg, Germany
Proceedings: ITG-Fb. 268: SCC 2017
Pages: 6Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Lazaro, Francisco (Institute of Communications and Navigation, DLR (German Aerospace Center), Weßling, Germany)
In this paper, we study slotted Spread Spectrum Aloha with Successive Interference Cancelation at the receiver over a Gaussian channel. We consider a decentralized power control setting in which each user chooses its transmit power independently at random according to a power distribution with continuous support. In this setting, we derive an analytical expression for the expected interference power experienced by a user. This allows us to derive analytically the power distribution that, during the Successive Interference Cancelation process leads to a constant signal to noise plus interference ratio for all users. We consider both perfect and imperfect interference cancellation.