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Benefits of Multiuser Diversity with Limited Feedback.
Mathias Johansson
SPAWC 2003
(Signal Processing Advances in Wireless Communications),
June 15-18 2003.
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Abstract:
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This work studies the effects of utilizing multiuser diversity in
realistic settings with limited feedback and uncertain traffic
loads.
A simple optimal method for setting rate
quantization levels is derived and it is shown that an added
benefit of multiuser diversity is that channel feedback can be
heavily quantized without performance loss. In the limit as the
number of users goes to infinity, even the most severe rate
quantization ($2$ levels) does not reduce throughput at all from
the case with unlimited rate resolution. Some important
implications for the joint utilization of multiuser diversity and
multi-antenna techniques are addressed.
Further, a throughput-optimal scheduling policy for uncertain and
bursty traffic loads is derived. An approximate policy is given
with attractive computational complexity.
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Related publications:
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Ph.D Thesis
by Mathias Johansson.
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SPAWC04
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RVK02 paper
on multiuser diversity and maximum entropy scheduling.
- Globecom 2001 paper.
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Research on these problems at UU
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Main
entry in list of publications
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