Joint Subcarrier and Antenna State Selection for Cognitive Heterogeneous Networks with Reconfigurable Antennas

Mustafa Harun Yllmaz, Mohamed Abdallah, Hassan M. El-Sallabi, Jean Francois Chamberland, Khalid Qaraqe, Huseyin Arslan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Reconfigurable antennas (RA) offer an emerging technology that allows wireless devices to alter their antenna states determined by different radiation patterns to maximize received signal strength. In this paper, we consider multiuser orthogonal frequency-division multiple access cognitive heterogeneous networks (HetNets) and we study the potential benefits of employing RA in terms of improving the overall network capacity. In cognitive HetNets, a secondary network is allowed to share the spectrum with the primary network under the condition that the interference level experienced by the primary network is below a predetermined threshold. To satisfy this interference constraint, a secondary user (SU) employs a power control mechanism, which typically limits its transmission power and thus reduces substantially its performance. Moreover, the large number of users expected for next-generation networks brings dense interference to the secondary network and, as such, even efficient interference mitigation and resource allocation techniques can fail in maintaining an acceptable performance level for the network. In this work, we consider utilizing RA technology at SUs to act as an additional resource in terms of selecting antenna radiation patterns that improve received signal strength among SUs. This also limits the mutual interference between the secondary and primary networks. We propose a game theoretical framework for jointly selecting the subcarriers as well as the RA antenna state at each SU that maximizes the overall capacity of the network while meeting the interference target in the primary network. Using potential games that guarantee the existence of a Nash equilibrium, our results show that, by selecting the best RA state and subcarriers for each SU, the capacity of the secondary network increases substantially compared to a scenario with conventional omni-directional antennas.

Original languageEnglish
Article number7244209
Pages (from-to)4015-4025
Number of pages11
JournalIEEE Transactions on Communications
Volume63
Issue number11
DOIs
Publication statusPublished - 1 Nov 2015

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Heterogeneous networks
Antennas
Directional patterns (antenna)
Next generation networks
Frequency division multiple access
Power transmission
Power control
Resource allocation

Keywords

  • game theory
  • nash equilibrium
  • potential game
  • power control
  • reconfigurable antenna
  • Subcarrier allocation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Joint Subcarrier and Antenna State Selection for Cognitive Heterogeneous Networks with Reconfigurable Antennas. / Yllmaz, Mustafa Harun; Abdallah, Mohamed; El-Sallabi, Hassan M.; Chamberland, Jean Francois; Qaraqe, Khalid; Arslan, Huseyin.

In: IEEE Transactions on Communications, Vol. 63, No. 11, 7244209, 01.11.2015, p. 4015-4025.

Research output: Contribution to journalArticle

Yllmaz, Mustafa Harun ; Abdallah, Mohamed ; El-Sallabi, Hassan M. ; Chamberland, Jean Francois ; Qaraqe, Khalid ; Arslan, Huseyin. / Joint Subcarrier and Antenna State Selection for Cognitive Heterogeneous Networks with Reconfigurable Antennas. In: IEEE Transactions on Communications. 2015 ; Vol. 63, No. 11. pp. 4015-4025.
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