Channel allocation algorithms for multi-carrier multiple-antenna systems

Toufik, Issam;Knopp, Raymond
Signal processing, Volume 86, N°8, August 2006, Special Section: Advances in Signal Processing-assisted Cross-layer Designs

This study focuses on orthogonal channel allocation strategies yielding multiuser diversity with a deterministic channel use in a N-user system with N parallel sub-channels. The techniques are applicable, for instance, in Orthogonal Frequency Division Multiple- Access (OFDMA) systems with dynamic sub-carrier allocation. We show that multiuser diversity, and thus an increase of aggregate data rates with the size of the user population, can still be successfully achieved even under a hard fairness constraint. Furthermore, we provide algorithms which perform channel allocation yielding variable-rate with constant power and fixed-rate with variable power. We show the effect of system bandwidth (and thus sub-channel correlation) on multiuser diversity. The techniques considered here do not require phase information in the channel allocation process, which, from a practical point-of-view is particularly important for time-division duplex systems exploiting channel reciprocity.


DOI
Type:
Journal
Date:
2006-08-01
Department:
Systèmes de Communication
Eurecom Ref:
1872
Copyright:
© Elsevier. Personal use of this material is permitted. The definitive version of this paper was published in Signal processing, Volume 86, N°8, August 2006, Special Section: Advances in Signal Processing-assisted Cross-layer Designs and is available at : http://dx.doi.org/10.1016/j.sigpro.2005.09.036

PERMALINK : https://www.eurecom.fr/publication/1872