On near-far gain in multiuser diversity systems

Kimmo  Kansanen; Ralf R.  Müller

4th International ICST Workshop on Resource Allocation in Wireless Networks

Research Article

On near-far gain in multiuser diversity systems

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@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

Kimmo Kansanen¹^,*, Ralf R. Müller¹

1: Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.

*Contact email: kimmo.kansanen@iet.ntnu.no

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.

Keywords: Fading Measurement Optimal scheduling Power control Propagation losses Random variables Statistical distributions Statistics Throughput Wireless communication

Published: 2008-08-01
Publisher: IEEE

: http://dx.doi.org/10.4108/ICST.WIOPT2008.3186