In this paper, the problem of resource allocation
in multiuser single-antenna wideband OFDM(A) systems is
considered from a cross-layer point of view. The main motivation
is to show advantages of such systems with respect to narrowband
systems. Despite the maximum normalized average throughput is
not increased with respect to that in a narrowband system, a more
efficient use of resources is possible by considering frequency as
an additional resource to be allocated. It is shown that when the
bandwidth is considerably larger than the coherence bandwidth
of the channel and the channel is varying slowly with respect to
the scheduling period, average delay can significally be improved.
In that case, the average delay is only proportional to the
scheduling period and not to the channel coherence time (as
it is the case in narrowband systems). Furthermore, different
reasource allocation policies are analyzed to show average delay
improvements when buffer occupancy information is used.
CitationPérez, A.; REALP, M.; Knopp, R. Delay bunds for resource allocation in wideband wireless systems. A: ICC 2006. "ICC 2006". Estambul: 2006, p. 4385-4390.
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