Stochastic resource allocation for hybrid spectrum access OFDMA-based cognitive radios

A stochastic radio resource allocation (RRA) algorithm is designed to maximize the total transmission rate of orthogonal frequency-division multiple access (OFDMA) cognitive radios (CRs) with hybrid (i.e., joint underlay and overlay) spectrum access strategy. Our novel solution incorporates the prob...

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Bibliographic Details
Published in2015 IEEE International Conference on Communications (ICC) pp. 7750 - 7755
Main Authors Saki, H., Shojaeifard, A., Martini, M. G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2015
Subjects
Aggregates
Cognitive radio
Interference
OFDM
Resource management
Sensors
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Summary:A stochastic radio resource allocation (RRA) algorithm is designed to maximize the total transmission rate of orthogonal frequency-division multiple access (OFDMA) cognitive radios (CRs) with hybrid (i.e., joint underlay and overlay) spectrum access strategy. Our novel solution incorporates the probabilities of channel availability obtained through spectrum sensing for allocating power and subcarrier in a multi-user multi-band environment. In order to protect the licensed users from harmful intervention under imperfect sensing information, stochastic transmit and interference power constraints are imposed on the CRs. The performance of the proposed RRA algorithm and advantages over the conventional hard-decision-based approaches are demonstrated via simulation.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2015.7249566