Optimum scheduling for orthogonal multiple access over fading channels using quantized channel state information

Antonio G. Marques, Georgios B. Giannakis, F. Javier Ramos

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations

Abstract

The efficiency of multi-access communications over wireless fading links benefits from channel-adaptive allocation of the available bandwidth and power resources. Different from most existing approaches that allocate resources based on perfect channel state information (P-CSI), this work optimizes channel scheduling and resource allocation over orthogonal fading channels when user terminals and the scheduler rely on quantized channel state information (Q-CSI). The novel unifying approach optimizes an average transmit-performance criterion subject to average quality of service requirements. The resultant optimal policy per fading realization either allocates the entire channel to a single (winner) user, or, to a small group of winner users whose percentage of shared resources is found by solving a linear program. Both alternatives become possible by smoothing the allocation scheme. The smooth policy is asymptotically optimal and incurs reduced computational complexity.

Original languageEnglish (US)
Pages366-370
Number of pages5
DOIs
StatePublished - Dec 1 2008
Event2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008 - Recife, Brazil
Duration: Jul 6 2008Jul 9 2008

Other

Other2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008
CountryBrazil
CityRecife
Period7/6/087/9/08

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