Research Article
On near-far gain in multiuser diversity systems
@INPROCEEDINGS{10.4108/ICST.WIOPT2008.3186, author={Kimmo Kansanen and Ralf R. M\'{y}ller}, title={On near-far gain in multiuser diversity systems}, proceedings={4th International ICST Workshop on Resource Allocation in Wireless Networks}, publisher={IEEE}, proceedings_a={RAWNET}, year={2008}, month={8}, keywords={Fading Measurement Optimal scheduling Power control Propagation losses Random variables Statistical distributions Statistics Throughput Wireless communication}, doi={10.4108/ICST.WIOPT2008.3186} }- Kimmo Kansanen
Ralf R. Müller
Year: 2008
On near-far gain in multiuser diversity systems
RAWNET
IEEE
DOI: 10.4108/ICST.WIOPT2008.3186
Abstract
Multiuser diversity scheduling in a single-cell system is studied. The scheduler chooses a constant size subset of users with best short term fading gains and coordinates transmissions using superposition coding. Rate allocation is performed according to userspsila channel states assuming equal power allocation over users. Asymptotic analysis of system capacity is applied to study system behavior at low and high spectral efficiencies. It is found that if users have non-symmetric channel distributions, i.e. path loss is present, with large enough user population it becomes beneficial in the sum rate sense to schedule more than one user at a time.
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