Secondary transmit beamformings for spectrum leasing in CRNs in the presence of eavesdropper

Masahiro Endo, Tomoaki Ohtsuki, Takeo Fujii, Osamu Takyu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Spectrum leasing is one of the cognitive radio models, where a primary user leases its spectrum resources for secondary user in exchange for cooperation. In [1] cooperative communication with beamforming (BF) in spectrum leasing was proposed for primary secure communications. However, interference is caused to the primary user from secondary user with its scheme. Therefore, we focus on cooperative communications where secondary users use orthogonal BFs that do not affect primary user. We consider the effects of secondary cooperation and the knowledge of eavesdropper's channel state information (CSI) on the cooperative communications. By simulation, we evaluate primary secrecy capacity, primary secrecy capacity outage probability, secondary sum throughput, and primary throughput. We show that secondary transmit BFs in spectrum leasing are effective for both primary and secondary systems in terms of primary secure communications without any interference from secondary user and with small degradation of the secondary throughput.

Original languageEnglish
Title of host publicationIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages758-762
Number of pages5
Volume2015-June
ISBN (Print)9781479949120
DOIs
Publication statusPublished - 2015 Jun 25
Event2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014 - Washington, United States
Duration: 2014 Sep 22014 Sep 5

Other

Other2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014
CountryUnited States
CityWashington
Period14/9/214/9/5

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Endo, M., Ohtsuki, T., Fujii, T., & Takyu, O. (2015). Secondary transmit beamformings for spectrum leasing in CRNs in the presence of eavesdropper. In IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC (Vol. 2015-June, pp. 758-762). [7136266] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2014.7136266