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Resource allocation for physical-layer security in OFDMAdownlinkwith imperfect CSI None

Wei YANG, Jing MAO, Chen CHEN, Xiang CHENG, Liu-qing YANG, Hai-ge XIANG

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 3,   Pages 398-408 doi: 10.1631/FITEE.1700026

Abstract: We investigate the problem of resource allocation in a downlink orthogonal frequency-division multiple access (OFDMA) broadband network with an eavesdropper under the condition that both legitimate users and the eavesdropper are with imperfect channel state information (CSI). We consider three kinds of imperfect CSI: (1) noise and channel estimation errors, (2) feedback delay and channel prediction, and (3) limited feedback channel capacity, where quantized CSI is studied using rate-distortion theory because it can be used to establish an informationtheoretic lower bound on the capacity of the feedback channel. The problem is formulated as joint power and subcarrier allocation to optimize the maximum-minimum (max-min) fairness criterion over the users’ secrecy rate. The problem considered is a mixed integer nonlinear programming problem. To reduce the complexity, we propose a two-step suboptimal algorithm that separately performs power and subcarrier allocation. For a given subcarrier assignment, optimal power allocation is achieved by developing an algorithm of polynomial computational complexity. Numerical results show that our proposed algorithm can approximate the optimal solution.

Keywords： allocation     Orthogonal frequency-division multiple access (OFDMA)     Imperfect channel state information (CSI)     Physicallayer security    

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Secrecy performance analysis of single-input multiple-output generalized- Article

Hong-jiang LEI,Imran Shafique ANSARI,Chao GAO,Yong-cai GUO,Gao-feng PAN,Khalid A. QARAQE

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 10,   Pages 1074-1084 doi: 10.1631/FITEE.1601070

Abstract: In this paper, the transmission of confidential messages through single-input multiple-output (SIMO) independent and identically generalized- ( G) fading channels is considered, where the eavesdropper overhears the transmission from the transmitter to the receiver. Both the receiver and the eavesdropper are equipped with multiple antennas, and both active and passive eavesdroppings are considered where the channel state information of the eavesdropper’s channel is or is not available at the transmitter. The secrecy performance of SIMO G systems is investigated. Analytical expressions for secrecy outage probability and average secrecy capacity of SIMO systems are derived via two different methods, in which G distribution is approximated by the Gamma and mixture Gamma distributions, respectively. Numerical results are presented and verified via the Monte-Carlo simulation.

Keywords： Physical-layer security     Generalized-K fading     Average secrecy capacity     Secrecy outage probability    

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Correlated channelmodel-based securecommunications in dual-hopwireless communication networks Article

Zhen-hua YUAN, Chen CHEN, Xiang CHENG, Guo-cheng LV, Liu-qing YANG, Ye JIN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 6,   Pages 796-807 doi: 10.1631/FITEE.1700023

Abstract: This article is focused on secure relay beamformer design with a correlated channel model in the relay-eavesdropper network. In this network, a single-antenna source-destination pair transmits secure information with the help of an amplify-and-forward (AF) relay equipped with multiple antennas, and the legitimate and eavesdropping channels are correlated. The relay cannot obtain the instantaneous channel state information (CSI) of the eavesdropper, and has only the knowledge of correlation information between the legitimate and eavesdropping channels. Depending on this information, we derive the conditional distribution of the eavesdropping channel. Two beamformers at the relay are studied for the approximate ergodic secrecy rate: (1) the generalized match-andforward (GMF) beamformer to maximize the legitimate channel rate, and (2) the general-rank beamformer (GRBF). In addition, one lower-bound-maximizing (LBM) beamformer at the relay is discussed for maximizing the lower bound of the ergodic secrecy rate. We find that the GMF beamformer is the optimal rank-one beamformer, that the GRBF is the iteratively optimal beamformer, and that the performance of the LBM beamformer for the ergodic secrecy rate gets close to that of the GRBF for the approximate secrecy rate. It can also be observed that when the relay has lower power or the channel gain of the second hop is low, the performance of the GMF beamformer surpasses that of the GRBF. Numerical results are presented to illustrate the beamformers’ performance.

Keywords： Physical layer security     Relay beamforming     Correlated channels     Ergodic secrecy rate    

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Short-term and impending precursor of sand layer stress in Wenchuan Earthquake

Wang Baoyu,Tong Xiaohui,Sun Xiaoming ,Sun Wei

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 146-152

Abstract:

An earthquake preparation physical model was established based on observationdata of sand layer stress instrument in Changping and Xiji, Beijing, earthquake precursor in the pastDecember 26, 2004.The short-term and impending precursor of Wenchuan Earthquake recorded by the sand layer

Keywords： Wenchuan Earthquake     sand layer stress instrument     earthquake preparation physical model of sand layer    

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Joint cooperative beamforming and artificial noise design for secureAF relay networks with energy-harvesting eavesdroppers Article

He-hao NIU, Bang-ning ZHANG, Dao-xing GUO, Yu-zhen HUANG, Ming-yue LU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 6,   Pages 850-862 doi: 10.1631/FITEE.1601832

Abstract: In this paper, we investigate physical layer security for simultaneous wireless information and power

Keywords： Simultaneous wireless information and power transfer     Physical layer security     Relay networks     Cooperative    

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On optimization of cooperative MIMO for underlaid secrecy Industrial Internet of Things Research Article

Xinyao WANG, Xuyan BAO, Yuzhen HUANG, Zhong ZHENG, Zesong FEI

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 2,   Pages 259-274 doi: 10.1631/FITEE.2200188

Abstract: In this paper, techniques are investigated for , which operates as an underlaid cognitive radio system that coexists with a primary user (PU). The underlaid secrecy paradigm is enabled by improving the secrecy rate towards the C-MIMO receiver and reducing the interference towards the PU. Such a communication model is especially suitable for implementing Industrial Internet of Things (IIoT) systems in the unlicensed spectrum, which can trade off spectral efficiency and information secrecy. To this end, we propose an (EAP) method and formulate the secrecy rate optimization problem, which is subject to both the single device power constraint and the interference power constraint. This precoder design is enabled by decomposing the original optimization problem into eigenspace selection and power allocation sub-problems. Herein, the eigenvectors are adaptively selected by the transmitter according to the channel conditions of the underlaid users and the PUs. In addition, a simplified EAP method is proposed for large-dimensional C-MIMO transmission, exploiting the additional spatial degree of freedom for a low-complexity secrecy precoder design. Numerical results show that by transmitting signal and artificial noise in the properly selected eigenspace, C-MIMO can eliminate the secrecy outage and outperforms the fixed eigenspace precoding methods. Moreover, the proposed simplified EAP method for the large-dimensional C-MIMO can significantly improve the secrecy rate.

Keywords： Cognitive radio network     Physical layer security     Cooperative multi-input multi-output (C-MIMO)     Eigenspace-adaptive    

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Physical layer security of underlay cognitive radio using maximal ratio combining Article

Hui ZHAO,Dan-yang WANG,Chao-qing TANG,Ya-ping LIU,Gao-feng PAN,Ting-ting LI,Yun-fei CHEN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9,   Pages 929-937 doi: 10.1631/FITEE.1500351

Abstract: We investigate the secrecy outage performance of maximal ratio combining (MRC) in cognitive radio networks over Rayleigh fading channels. In a single-input multiple-output wiretap system, we consider a secondary user (SU-TX) that transmits confidential messages to another secondary user (SU-RX) equipped with ( 1) antennas where the MRC technique is adopted to improve its received signal-to-noise ratio. Meanwhile, an eavesdropper equipped with ( 1) antennas adopts the MRC scheme to overhear the information between SU-TX and SU-RX. SU-TX adopts the underlay strategy to guarantee the service quality of the primary user without spectrum sensing. We derive the closed-form expressions for an exact and asymptotic secrecy outage probability.

Keywords： Cognitive radio networks     Maximal ratio combining     Secrecy outage probability     Single-input multiple-output    

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Onmodeling of electrical cyber-physical systems considering cyber security Project supported

Yi-nan WANG,Zhi-yun LIN,Xiao LIANG,Wen-yuan XU,Qiang YANG,Gang-feng YAN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 465-478 doi: 10.1631/FITEE.1500446

Abstract: This paper establishes a new framework for modeling electrical cyber-physical systems (ECPSs), integratingdownloading channels are assumed to connect every node in the communication network and a corresponding physical

Keywords： Cyber-physical systems     Cyber attacks     Cascading failure analysis     Smart grid    

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Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel state information Article

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 4,   Pages 578-590 doi: 10.1631/FITEE.1500430

Abstract: combining (MRC) and selection combining (SC) with imperfect channel state information (CSI) in the physicallayer.

Keywords： Ergodic secrecy capacity (ESC)     Maximal ratio combining (MRC)     Weighting errors     Physical layer security    

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Security Pattern and Regulation of Agricultural Water Resources in Northwest China from the Perspective

Zhang Jiaxin, Deng Mingjiang, Li Peng, Li Zhanbin, Huang Huiping, Shi Peng, Feng Chaohong

Strategic Study of CAE 2022, Volume 24, Issue 1,   Pages 131-140 doi: 10.15302/J-SSCAE-2022.01.014

Abstract: virtual water trade structures and encouraging inter-basin water transfer are key measures to regulate physicalIt allowed researchers to re-examine issues such as food security, water security, and agricultural productBecause of the local water shortage, the excessive development and utilization of physical water poseda threat to the regional water security.

5.2.3 Implement regulation measures of physical–virtual water

Keywords： Northwest China     crop production and trade     water security     food security     regulation of physical and    

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Theoretical research and application of petrochemical Cyber-physical Systems

Jiming WANG

Frontiers of Engineering Management 2017, Volume 4, Issue 3,   Pages 242-255 doi: 10.15302/J-FEM-2017053

Abstract: A Cyber-physical System (CPS) is the infrastructure of a petrochemical smart factory.

Keywords： Cyber-physical System (CPS)     petrochemical industry     smart factory    

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A survey of physical activity among urban women in China

Shilin DENG MD, Tongyuan LIU,

Frontiers of Medicine 2009, Volume 3, Issue 4,   Pages 463-469 doi: 10.1007/s11684-009-0081-y

Abstract: Few studies have been conducted to assess the level of physical activity (PA) of women in China.The proportion of physical inactivity was around 26.8%.Physical inactivity appears to be more common among younger women, or college-educated women, office

Keywords： physical activity     urban women     China    

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Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 503-518 doi: 10.1007/s42524-021-0163-3

Abstract: The Cyber–Physical Power System (CPPS) is one of the most critical infrastructure systems in a countrycomponents, identifying and protecting critical nodes, and enhancing the coupling patterns between physical

Keywords： Cyber–Physical Power System     resilience assessment     resilience optimization     cascading failure modeling    

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Comprehensive review of modeling, structure, and integration techniques of smart buildings in the cyber-physical-social

Frontiers in Energy 2022, Volume 16, Issue 1,   Pages 74-94 doi: 10.1007/s11708-021-0792-6

Abstract: Involving human behaviors and cyber space, a traditional power system evolves into a cyber-physical-social

Keywords： smart buildings     cyber-physical-social-system     optimization     modeling     demand response     virtual power    

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Chemically reactive solute transfer in a boundary layer slip flow along a stretching cylinder

Swati Mukhopadhyay

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 385-391 doi: 10.1007/s11705-011-1101-4

Abstract: distribution of a solute undergoing a first order chemical reaction in an axisymmetric laminar boundary layer

Keywords： boundary layer     stretching cylinder     partial slip     mass transfer     similarity solution    

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Title Author Date Type Operation

Resource allocation for physical-layer security in OFDMAdownlinkwith imperfect CSI

Wei YANG, Jing MAO, Chen CHEN, Xiang CHENG, Liu-qing YANG, Hai-ge XIANG

Journal Article

Secrecy performance analysis of single-input multiple-output generalized-

Hong-jiang LEI,Imran Shafique ANSARI,Chao GAO,Yong-cai GUO,Gao-feng PAN,Khalid A. QARAQE

Journal Article

Correlated channelmodel-based securecommunications in dual-hopwireless communication networks

Zhen-hua YUAN, Chen CHEN, Xiang CHENG, Guo-cheng LV, Liu-qing YANG, Ye JIN

Journal Article

Short-term and impending precursor of sand layer stress in Wenchuan Earthquake

Wang Baoyu,Tong Xiaohui,Sun Xiaoming ,Sun Wei

Journal Article

Joint cooperative beamforming and artificial noise design for secureAF relay networks with energy-harvesting eavesdroppers

He-hao NIU, Bang-ning ZHANG, Dao-xing GUO, Yu-zhen HUANG, Ming-yue LU

Journal Article

On optimization of cooperative MIMO for underlaid secrecy Industrial Internet of Things

Xinyao WANG, Xuyan BAO, Yuzhen HUANG, Zhong ZHENG, Zesong FEI

Journal Article

Physical layer security of underlay cognitive radio using maximal ratio combining

Hui ZHAO,Dan-yang WANG,Chao-qing TANG,Ya-ping LIU,Gao-feng PAN,Ting-ting LI,Yun-fei CHEN

Journal Article

Onmodeling of electrical cyber-physical systems considering cyber security Project supported

Yi-nan WANG,Zhi-yun LIN,Xiao LIANG,Wen-yuan XU,Qiang YANG,Gang-feng YAN

Journal Article

Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel state information

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Journal Article

Security Pattern and Regulation of Agricultural Water Resources in Northwest China from the Perspective

Zhang Jiaxin, Deng Mingjiang, Li Peng, Li Zhanbin, Huang Huiping, Shi Peng, Feng Chaohong

Journal Article

Theoretical research and application of petrochemical Cyber-physical Systems

Jiming WANG

Journal Article

A survey of physical activity among urban women in China

Shilin DENG MD, Tongyuan LIU,

Journal Article

Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Journal Article

Comprehensive review of modeling, structure, and integration techniques of smart buildings in the cyber-physical-social

Journal Article

Chemically reactive solute transfer in a boundary layer slip flow along a stretching cylinder

Swati Mukhopadhyay

Journal Article