Channel allocation algorithms for multi-carrier multiple-antenna systems
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.
| Mots Clés: | Multiuser diversity; Fairness; Channel allocation; Multiple antennas; Multi-carrier; OFDMA |
| Type: | Journal |
| Langue: | English |
| Date: | Août 2006 |
| Département: | Communications Mobiles |
| 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 |
| Bibtex: | @article{EURECOM+1872, doi = {http://dx.doi.org/10.1016/j.sigpro.2005.09.036}, year = {2006}, month = {08}, title = {{C}hannel allocation algorithms for multi-carrier multiple-antenna systems}, author = {{T}oufik, {I}ssam and {K}nopp, {R}aymond}, journal = {{S}ignal processing, {V}olume 86, {N}°8, {A}ugust 2006, {S}pecial {S}ection: {A}dvances in {S}ignal {P}rocessing-assisted {C}ross-layer {D}esigns}, url = {http://www.eurecom.fr/publication/1872} } |
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