Fuzzy Logic Based Opportunistic Spectrum Access and Spectrum Handoff for OFDM based Cognitive Radio Networks. Kaiser, M. S. January, 2009. abstract bibtex In this paper, we investigate the opportunistic spectrum access and spectrum handoff in a cognitive radio network (CRN). The cognitive radios (CRs) or secondary users (SUs) enable opportunistic spectrum access to sense the unused spectrum. They adapt their operating characteristics to the real time environment in order to maximize the quality of service (QoS). A SU has to initiate a spectrum handoff when it causes interference to primary user (PU) or when the QoS is not satisfactory. We propose fuzzy logic based approach to select radio spectrum opportunistically with the proportional fairness scheduling. Through this approach spectrum hand off (HO) decision is also made using power control technique. The proposed spectrum access and HO algorithms are compared with the fixed threshold and existing fuzzy controlled HO algorithms. It is observed that the percentage of handoff of the SUs is reduced in our case and the data rate of the system is also increased considerably.
@book{kaiser_fuzzy_2009-1,
title = {Fuzzy {Logic} {Based} {Opportunistic} {Spectrum} {Access} and {Spectrum} {Handoff} for {OFDM} based {Cognitive} {Radio} {Networks}},
abstract = {In this paper, we investigate the opportunistic spectrum
access and spectrum handoff in a cognitive radio network
(CRN). The cognitive radios (CRs) or secondary users (SUs)
enable opportunistic spectrum access to sense the unused
spectrum. They adapt their operating characteristics to the
real time environment in order to maximize the quality of
service (QoS). A SU has to initiate a spectrum handoff when
it causes interference to primary user (PU) or when the QoS is
not satisfactory. We propose fuzzy logic based approach to
select radio spectrum opportunistically with the proportional
fairness scheduling. Through this approach spectrum hand off
(HO) decision is also made using power control technique.
The proposed spectrum access and HO algorithms are
compared with the fixed threshold and existing fuzzy
controlled HO algorithms. It is observed that the percentage
of handoff of the SUs is reduced in our case and the data rate
of the system is also increased considerably.},
author = {Kaiser, M. Shamim},
month = jan,
year = {2009},
}
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