On the Secrecy Capacity of Fading Channels

Gopala, Praveen Kumar; Lai, Lifeng; Gamal, Hesham El

doi:10.1109/tit.2008.928990

Cited by 1,173 publications

(813 citation statements)

References 21 publications

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“…With CSIT, (11) is generally maximized by the "secrecy waterfilling" based power allocation policies [14], [17]. For no-delay-limited secrecy information transmission, we aim at maximizing the ESC for the IR subject to the same set of constraints (APC, PPC at the Tx, and an average harvested power constraint at the ER) as for the delay-limited case in (P1).…”

Section: B No-delay-limited Secrecy Information Transmissionmentioning

confidence: 99%

“…However, [11] considered the additive white Gaussian noise (AWGN) channels, while the optimal AN-aided secrecy transmission design for SWIPT systems over fading channels has not yet been addressed in the literature, which motivates this work. It is also worth pointing out that although channel fading is traditionally regarded as a detrimental factor to the wireless channel capacity, it can be exploited to reduce the secrecy communication outage probability [12]- [16] or improve the wireless channel secrecy capacity [12], [14], [17], [18]. For the secrecy outage probability minimization for wireless fading channels with stringent transmission delay constraint, [14] has derived the optimal power allocations in the fading broadcast channel with confidential messages assuming the channel state information known at the transmitter (CSIT).…”

Section: Introductionmentioning

confidence: 99%

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Secrecy wireless information and power transfer in fading wiretap channel

Xing

Liu

Zhang

2014

2014 IEEE International Conference on Communications (ICC)

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Abstract-Simultaneous wireless information and power transfer (SWIPT) has recently drawn significant interests for its dual use of radio signals to provide wireless data and energy access at the same time. However, a challenging secrecy communication issue arises as the messages sent to the information receivers (IRs) may be eavesdropped by the energy receivers (ERs), which are presumed to harvest energy only from the received signals. To tackle this problem, we propose in this paper an artificial noise (AN) aided transmission scheme to facilitate the secrecy information transmission to IRs and yet meet the energy harvesting requirement for ERs, under the assumption that the AN can be cancelled at IRs but not at ERs. Specifically, the proposed scheme splits the transmit power into two parts, to send the confidential message to the IR and an AN to interfere with the ER, respectively. Under a simplified threenode wiretap channel setup, the transmit power allocations and power splitting ratios over fading channels are jointly optimized to minimize the outage probability for delay-limited secrecy information transmission, or to maximize the average rate for no-delay-limited secrecy information transmission, subject to a combination of average and peak power constraints at the transmitter as well as an average energy harvesting constraint at the ER. Both the secrecy outage probability minimization and average rate maximization problems are shown to be non-convex, for each of which we propose the optimal solution based on the dual decomposition as well as suboptimal solution based on the alternating optimization. Furthermore, two benchmark schemes are introduced for comparison where the AN is not used at the transmitter and the AN is used but cannot be cancelled by the IR, respectively. Finally, the performances of proposed schemes are evaluated by simulations in terms of various trade-offs for wireless (secrecy) information versus energy transmissions.Index Terms-Simultaneous wireless information and power transfer (SWIPT), physical-layer security, energy harvesting, power control, artificial noise, fading channel, outage probability, ergodic capacity, alternating optimization.

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Section: B No-delay-limited Secrecy Information Transmissionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Secrecy wireless information and power transfer in fading wiretap channel

Xing

Liu

Zhang

2014

2014 IEEE International Conference on Communications (ICC)

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“…With the widespread adoption of multiple-input multiple-output (MIMO) systems, there has been a significant recent interest in information theoretic physical layer security, the main premise of which is to exploit the difference in the wireless channels of different users. Information theoretic security has been investigated for a variety of channel models ranging from fading channels [1], [2], MIMO wiretap channels [3]- [6], multiple access channels [7]- [9], multi-receiver wiretap channels [10], broadcast channels with confidential messages [11]- [13], wiretap channels with helpers [14], etc.…”

Section: Introductionmentioning

confidence: 99%

MISO broadcast channels with confidential messages and alternating CSIT

Mukherjee

Tandon

Ulukuş

2014

2014 IEEE International Symposium on Information Theory

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Abstract-We study the two-user multiple-input single-output (MISO) broadcast channel with confidential messages under the assumption of alternating channel state information at the transmitter (CSIT). We consider two alternating states: PD and DP which occur for an equal fraction of time. In state PD, the CSIT of the channel to the first receiver is available perfectly without delay (P) while that of the second receiver is available with a delay of one channel use (D); in state DP, the roles of the receivers are reversed. We characterize the exact secure degrees of freedom (s.d.o.f.) region of this system, and show as a corollary that the sum s.d.o.f. is

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“…We further assume that the users allocated no transmission time slots will not be allocated any power. Given and the corresponding transmit power , the instantaneous secrecy rate of the -th user is given by [32,33] as follows:…”

Section: System Modelmentioning

confidence: 99%

Fair Resource Allocation with QoS Guarantee in Secure Multiuser TDMA Networks

Bai

Wang

et al. 2018

Wireless Communications and Mobile Computing

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We investigate a secure multiuser time division multiple access (TDMA) system with statistical delay quality of service (QoS) guarantee in terms of secure effective capacity. An optimal resource allocation policy is proposed to minimize the -fair cost function of the average user power under the individual QoS constraint, which also balances the energy efficiency and fairness among the users. First, convex optimization problems associated with the resource allocation policy are formulated. Then, a subgradient iteration algorithm based on the Lagrangian duality theory and the dual decomposition theory is employed to approach the global optimal solutions. Furthermore, considering the practical channel conditions, we develop a stochastic subgradient iteration algorithm which is capable of dynamically learning the intended wireless channels and acquiring the global optimal solution. It is shown that the proposed optimal resource allocation policy depends on the delay QoS requirement and the channel conditions. The optimal policy can save more power and achieve the balance of the energy efficiency and the fairness compared with the other resource allocation policies.

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On the Secrecy Capacity of Fading Channels

Cited by 1,173 publications

References 21 publications

Secrecy wireless information and power transfer in fading wiretap channel

Secrecy wireless information and power transfer in fading wiretap channel

MISO broadcast channels with confidential messages and alternating CSIT

Fair Resource Allocation with QoS Guarantee in Secure Multiuser TDMA Networks

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