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Spectrum Leasing via Cooperation for Enhanced Physical-Layer Secrecy
[article]
2012
arXiv
pre-print
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Spectrum leasing via cooperation refers to the possibility of primary users leasing a portion of the spectral resources to secondary users in exchange for cooperation. In the presence of an eavesdropper, this correspondence proposes a novel application of this concept in which the secondary cooperation aims at improving secrecy of the primary network by creating more interference to the eavesdropper than to the primary receiver. To generate the interference in a positive way, this work studies
arXiv:1205.0085v1
fatcat:c4tepol5tjhtzf3hr3z5ghtkpy
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... n optimal design of a beamformer at the secondary transmitter with multiple antennas that maximizes a secrecy rate of the primary network while satisfying a required rate for the secondary network. Moreover, we investigate two scenarios depending upon the operation of the eavesdropper: i) the eavesdropper treats the interference by the secondary transmission as an additive noise (single-user decoding) and ii) the eavesdropper tries to decode and remove the secondary signal (joint decoding). Numerical results confirm that, for a wide range of required secondary rate constraints, the proposed spectrum-leasing strategy increases the secrecy rate of the primary network compared to the case of no spectrum leasing.
A novel orthogonal space-time-frequency block code for OFDM systems
2009
IEEE Communications Letters
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Lee and J. ...
doi:10.1109/lcomm.2009.090680
fatcat:or4j2kcs5rcjha5nlngkoip3sy
Spectrum Leasing via Cooperation for Enhanced Physical-Layer Secrecy
2013
IEEE Transactions on Vehicular Technology
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Spectrum leasing via cooperation refers to the possibility for primary users to lease part of the spectral resources to secondary users in exchange for cooperation. This paper proposes a novel implementation of this concept in which secondary cooperation aims at improving the secrecy of the primary link. In particular, a secondary transmission with multiple antennas creates interference on both primary and eavesdropping receivers but an appropriately designed beamformer may impair more the
doi:10.1109/tvt.2013.2269617
fatcat:gszg3wmwsvdizco2ngiddvhczu
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... dropper's reception and thus enhance primary secrecy. The optimal design of the secondary beamformer that maximizes the primary secrecy rate while guaranteeing a minimal secondary rate is studied. It is proved that the problem can be solved in a domain that includes only two real numbers irrespective of the number of antennas. Numerical results show that the proposed spectrum leasing strategy increases the primary secrecy rate compared to the case of no spectrum leasing for a wide range of secondary minimum rate constraints. Index Terms-Physical security, spectrum leasing, Pareto boundary, interference channel.
Spectrum Leasing via Cooperation for Enhanced Physical-Layer Secrecy
2011
2011 IEEE International Conference on Communications (ICC)
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A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2011; you can also visit the original URL.
The file type is application/pdf.
Spectrum leasing via cooperation refers to the possibility for primary users to lease part of the spectral resources to secondary users in exchange for cooperation. This paper proposes a novel implementation of this concept in which secondary cooperation aims at improving the secrecy of the primary link. In particular, a secondary transmission with multiple antennas creates interference on both primary and eavesdropping receivers but an appropriately designed beamformer may impair more the
doi:10.1109/icc.2011.5963501
dblp:conf/icc/LeeSCK11
fatcat:qkoohpdeqrecnppa6m6p552pbi
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... dropper's reception and thus enhance primary secrecy. The optimal design of the secondary beamformer that maximizes the primary secrecy rate while guaranteeing a minimal secondary rate is studied. It is proved that the problem can be solved in a domain that includes only two real numbers irrespective of the number of antennas. Numerical results show that the proposed spectrum leasing strategy increases the primary secrecy rate compared to the case of no spectrum leasing for a wide range of secondary minimum rate constraints. Index Terms-Physical security, spectrum leasing, Pareto boundary, interference channel.
MIMO Transceiver Designs for Spatial Sensing in Cognitive Radio Networks
2011
IEEE Transactions on Wireless Communications
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We propose transceiver algorithms in cognitive radio networks where the cognitive users are equipped with multiple antennas. Prior work has focused on the design of precoding matrices to suppress interference to the primary receivers. This work considers designs of precoding and decoding matrices for spatial sensing to achieve two objectives: i) to prevent interference to the primary receivers and ii) to remove the interference, due to primary transmissions, at the secondary receiver. With
doi:10.1109/twc.2011.092711.101305
fatcat:cd6trlvcjfds3mj74lyo2xclo4
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... e antenna primary terminals and two antenna cognitive terminals, a linear transceiver design has been introduced under a global channel state information (CSI) assumption [1]. In this letter, multiple antenna primary and cognitive terminals and three different CSI scenarios depending upon the amount of CSI are studied: i) local CSI, ii) global CSI, and iii) local CSI with side information. When local CSI is available, we leverage prior work and employ the projected-channel singular value decomposition (P-SVD). In the global CSI scenario, we propose a joint transmitter-receiver design under the assumption of full CSI of all the users at the secondary transceiver. To reduce the feedback overhead, we also propose a new iterative algorithm that exploits only local CSI with side information. In this algorithm, the secondary transmitter and receiver iteratively update precoding and decoding matrices based on the local CSI and side information (precoding/decoding matrices at the previous iteration step) to maximize the rate of the secondary link while maintaining the zero-interference constraint. Convergence is established in the special case of single stream beamforming. Numerical results confirm that the proposed joint design and the iterative algorithm show better achievable rate performance than the P-SVD technique at the expense, respectively, of CSI knowledge and side information.
Energy efficiency analysis with circuit power consumption in massive MIMO systems
2013
2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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It was shown that the required transmit power to support a target achievable rate is inversely proportional to the number of antennas in massive multiple-input multipleoutput (MIMO) systems [1]. However, the consumed power of the massive MIMO systems should include not only transmit power but also the fundamental power for operating the circuit at the transmitter, because the effect of circuit power consumption is more serious when the transmitter is equipped with massive number of antennas.
doi:10.1109/pimrc.2013.6666272
dblp:conf/pimrc/HaLK13
fatcat:v42h37csgndalod2r6wg4dlkke
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... ce, to analyze the exact power consumption of massive MIMO systems, we investigate the energy efficiency for multiple cellular systems with large-scale antenna arrays under a consideration of circuit power consumption of each antenna. In particular, we propose a new power consumption model that considers not only transmit power on the power amplifier but also circuit power dissipated by analog devices and residually lossy factors in base stations (BSs). Through new energy efficiency formulation based on the proposed power consumption model, we analyze the tendency of the energy efficiency as the number of antennas increases and can see that the energy efficiency becomes a quasi-concave function with respect to the number of antennas. Finally, from the derived function of the energy efficiency, we determine the number of antennas to provide the maximum energy efficiency.
Transmit beamforming with imperfect CSIT in spectrum leasing for physical-layer security
2012
2012 IEEE Consumer Communications and Networking Conference (CCNC)
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In spectrum leasing, primary users (PUs) lease the part of their spectral resources to secondary users (SUs) in exchange for appropriate remuneration. In this paper, we consider spectrum leasing via cooperation for physical-layer security that the secondary cooperation exists for improving the primary secrecy rate while maintaining its quality of service (QoS). Unlike the previous researches with the perfect channel state information (CSI) at transmitter (CSIT) assumption, we study when no
doi:10.1109/ccnc.2012.6181182
dblp:conf/ccnc/JeongLKBK12
fatcat:heyasofmb5dpzantikvrylyjoy