Power allocation policies over multi-band/multi-user cognitive radio system

Haddad, Majed;Debbah, Merouane;Menouni Hayar, Aawatif
SSD'07, 4th IEEE international multi-conference on systems, signals & devices, March 17-19, 2007, Hammamet, Tunisia

This paper addresses the performance limits of a multi-band/multi-user frequency fading channels. We firstly study the optimal diversity-multiplexing trade-off of such systems when channel state information is available at the receiver only (CSIR). However, when channel state information is made available at the receiver and at the transmitter (CSIT), the transmitter knows the channel gains and thus will not send bits unless they can be decoded correctly. Accordingly, there is no more notion of capacity versus outage in this case where the transmitter sends bits that cannot be decoded. We introduce the notion of outage capacity and derive optimal outage-rate trade-off for some commonly used power allocations and conclude on their ability to optimize rate and/or outage with respect to classical uniform power allocation.

Systèmes de Communication
Eurecom Ref:
© 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

PERMALINK : https://www.eurecom.fr/publication/2203