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11th International Symposium on communications and information Technologies, ISCIT 2011

作者： Zheng, Shilian Yang, Xiaoniu Lou, Caiyi Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781457712944

Spectrum sensing is one of the fundamental problems for cognitive radio. In cognitive radio networks, cognitive radios can cooperatively sense the spectrum to detect the presence of primary users with higher sensitivity. This paper proposes distributed consensus algorithms for decision fusion based cooperative spectrum sensing. Both theoretical analysis and simulations are performed to show the convergence property of the algorithms. Results show that the proposed algorithms can realize central OR, AND, and M-out-of-n decision fusion rules by locally exchanging information among each radio and its adjacent neighbors in a distributed way. © 2011 IEEE.

关键词： Cognitive radio

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Implementation of sample rate conversion in direct RF synthesis transmitter

Implementation of sample rate conversion in direct RF synthe...

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2011 Cross Strait Quad-Regional Radio science and Wireless technology Conference, CSQRWC 2011

作者： Zhao, Yun Wang, LiJun Xu, JianLiang Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781424497904

In software defined radio (SDR) transmitter, the baseband data with protocol-specific symbol rate should be up-sampled to the fixed sample rate of synthesized carrier by arbitrary sample rate conversion (ASRC), before up-conversion. During the last few years, along with the rapid development of DAC technology, it is possible to implement direct RF synthesis using digital method. This paper presents implementation structure of a two stage SRC in FPGA, which can be used in Direct RF synthesis transmitter to interpolate the baseband data of variable symbol rate to RF sample rate. © 2011 IEEE.

关键词： Transmitters

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Wideband spectrum sensing in modulated wideband converter based cognitive radio system

Wideband spectrum sensing in modulated wideband converter ba...

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11th International Symposium on communications and information Technologies, ISCIT 2011

作者： Zheng, Shilian Yang, Xiaoniu Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781457712944

Wideband spectrum sensing is a fundamental problem in cognitive radio networks. In this paper, a wideband spectrum sensing procedure which consists of four steps, i.e., coarse support recovery, fine binary detection, band edges detection and clustering, for modulated wideband converter (MWC) based cognitive radio system at sub-Nyquist rate is proposed. Simulations show that with a sub-Nyquist sampling rate, the proposed spectrum sensing procedure can locate spectrum holes correctly. © 2011 IEEE.

关键词： Cognitive radio

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Specific primary user sensing for wireless security in IEEE 802.22 network

Specific primary user sensing for wireless security in IEEE ...

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11th International Symposium on communications and information Technologies, ISCIT 2011

作者： Luo, Zhenxing Lou, Caiyi Chen, Shichuan Zheng, Shilian Li, Shaowei Science and Technology on Communication Information Security Control Laboratory Jiaxing China

ISBN: (纸本)9781457712944

Cognitive Radio (CR) is considered as an effective technology for alleviating the spectrum shortage problem by enabling secondary users to utilize vacant spectrum allocated to a primary user (PU). IEEE 802.22 which is the first standard based on CR is developed to increase the efficiency of TV bands. However the physical layer security of IEEE 802.22 has been studied rarely. In this paper, we propose a scheme to sense the specific primary user for dealing with Primary User Emulation (PUE) Attack which is a possible threat to wireless security. According to ATSC digital TV which is one of the important PUs, we estimate the accuracies of pilot and symbol rate as RF fingerprint (RFF), and Support Vector Data Description (SVDD) is introduced to sense the fine differences of RFF to distinguish PUE attacker from PU. The simulation results show that the proposed scheme is feasible to verify the PUE attacker at a relative high SNR level. © 2011 IEEE.

关键词： Cognitive radio

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Bit Stream Oriented Enumeration Tree Pruning Algorithm

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Journal of Shanghai Jiaotong university(science) 2011年第5期16卷 567-570页

作者：邱卫东金凌杨小牛杨红娃 School of Information Security Engineering Shanghai Jiaotong University National Science and Technology on Communication Information Security Control Laboratory No. 36 Institute of China Electronics Technology Group Corporation

Packet analysis is very important in our digital life. But what protocol analyzers can do is limited because they can only process data in determined format. This paper puts forward a solution to decode raw data in an unknown format. It is certain that data can be cut into packets because there are usually characteristic bit sequences in packet headers. The key to solve the problem is how to find out those characteristic sequences. We present an efficient way of bit sequence enumeration. Both Aho-Corasick (AC) algorithm and data mining method are used to reduce the cost of the process.

关键词： pattern matching data mining frequent set frequent sequence association rule

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PSO Based Passive Satellite Localization Using TDOA and FDOA Measurements

PSO Based Passive Satellite Localization Using TDOA and FDOA...

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2011 10th IEEE/ACIS International Conference on Computer and information science, ICIS 2011

作者： Bin, Yang Zheng Yan, Qiu Nan, Lu An Science and Technology on Communication Information Security Control Laboratory Jiaxing Zhejiang 314033 China

ISBN: (纸本)9780769544014

Passive localization using TDOA and FDOA measurements usually does not have direct solution and requires numerical methods to determine the emitter's geolocation. We examine a satellite passive localization method based on particle swarm optimization(PSO), which provides an evolutionary computation method to solve the nonlinear optimal problem. However, PSO can not be straightforwardly applied to satellite passive localization because it is a constrained nonlinear optimal problem when using the constraint condition of the earth surface. We suggest "flying" the particle swarm directly using the earth surface constraint. Computer simulation results show the effectiveness of the new localization method. © 2011 IEEE.

关键词： Time difference of arrival

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Analysis on Token-controlled Public Key Encryption

Analysis on Token-Controlled Public Key Encryption

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International Conference on Mobile Ad-hoc and Sensor Networks, MSN

作者： Changlu Lin Yong Li Sriramkrishnan Srinivasan Li Lu Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou China Key Laboratory of Communication & Information Systems Beijing Municipal Commission of Education Beijing Jiaotong University Beijing China Department of Computing University of Surrey Guildford UK School of Computer Science University of Electronic Science and Technology Chengdu China

ISBN: (纸本)9781467358088

In this paper, we analyze on the use of token-controlled public key encryption (TCE)schemes. We argue that for many of the applications in some possibilities of application in financial or legal scenarios, for example, the millionaire's will problem, the `private-opening' commitment, the scheduled payment problem, and the sealed-bid auctions and electronic lotteries problem, in the literature, the use of token-controlled public key encryption on its own, leads to inadequate solutions. We suggest that when considering applications of TCE, it is advisable to pay close attention to the lack of authentication and incorporate defences against the problems highlighted in this paper.

关键词： Public key encryption Token-controlled public key encryption Authentication security and privacy Public key encryption Authentication Trichloroethylene

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Cooperative MIMO Channel Modeling and Multi-Link Spatial Correlation Properties

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IEEE Journal on Selected Areas in communications 2012年第2期30卷 388-396页

作者： Xiang Cheng Cheng-Xiang Wang Haiming Wang Xiqi Gao Xiao-Hu You Dongfeng Yuan Bo Ai Qiang Huo Ling-Yang Song Bing-Li Jiao School of Electronics and Computer Science Peking University Beijing China Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University China Joint Research Institute for Signal and Image Processing School of Engineering & Physical Sciences Heriot-Watt University Edinburgh UK School of Information Science and Engineering South East University Najing China School of Information Science and Engineering Shandong University Jinan China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

In this paper, a novel unified channel model framework is proposed for cooperative multiple-input multiple-output (MIMO) wireless channels. The proposed model framework is generic and adaptable to multiple cooperative MIMO scenarios by simply adjusting key model parameters. Based on the proposed model framework and using a typical cooperative MIMO communication environment as an example, we derive a novel geometry-based stochastic model (GBSM) applicable to multiple wireless propagation scenarios. The proposed GBSM is the first cooperative MIMO channel model that has the ability to investigate the impact of the local scattering density (LSD) on channel characteristics. From the derived GBSM, the corresponding multi-link spatial correlation functions are derived and numerically analyzed in detail.

关键词： MIMO Correlation Channel models Scattering Educational institutions Fading Adaptation models

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Issues and guiding principles for opening governmental judicial research data

Issues and guiding principles for opening governmental judic...

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11th IFIP WG 8.5 International Conference on Electronic Government, EGOV 2012

作者： Zuiderwijk, Anneke Janssen, Marijn Meijer, Ronald Choenni, Sunil Charalabidis, Yannis Jeffery, Keith Delft University of Technology Faculty of Technology Policy and Management Jaffalaan 5 2628 BX Delft Netherlands Ministry of Security and Justice Schedeldoekshaven 131 2511 EM Den Haag Netherlands Rotterdam University of Applied Sciences Creating 010 G.J. de Jonghweg 4-6 3015 GG Rotterdam Netherlands University of Aegean Department of Information and Communication Systems Engineering Karlovassi 83200 Samos Greece Science and Technology Facilities Council Rutherford Appleton Laboratory Didcot OX11 0QX Harwell Oxford United Kingdom

ISBN: (纸本)9783642334887

The opening of data is considered to provide many benefits. However, opening up data by public bodies is a complex and ill-understood activity. Although many public bodies might be willing to open up their data, they lack any systematic guidance. In this paper, guidance is provided by investigating the publishing processes at the Dutch Research and Documentation Centre (WODC), which owns governmental judicial research data. We developed guidance by providing 1) a list of issues that play a role in deciding whether to open data, 2) an alternative to completely publishing data (i.e. restricted access) and 3) solutions for overcoming some of the issues. The latter include dealing with privacy-sensitive data, deletion policies, publishing after embargo periods instead of not publishing at all, adding related documents and adding information about the quality and completeness of datasets. The institutional context should be taken into account when using the guidance, as opening data requires considerable changes of organizations. © 2012 IFIP International Federation for information Processing.

关键词： Sensitive data

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Temperature control system of air-conditioning based on the fuzzy theory

Temperature control system of air-conditioning based on the ...

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2011 IEEE International Conference on Mechatronics and Automation, ICMA 2011

作者： Jing, Jiang Xuesong, Zhang Science and Technology on Electro-optical Information Security Control Laboratory Beijing China Science and Technology on Electro-optical Information Security Control Laboratory Northeast Institute of Electronics Technology Hebei China

ISBN: (纸本)9781424481149

Two-dimensional fuzzy temperature controller was used in the system of inverter air-conditioner to control the room temperature. Self-adjustment PID fuzzy controller was proposed to realize real-time control function. V/F control mode was used to compensate with low voltage, the average sampling algorithm was proposed to implement SPWM waveform modulation. Finally, the feasibility of self-adjustment PID fuzzy controller was verified by simulation, the actual operation results had proved that self-adjustment PID fuzzy controller had reliable, good output waveform and small harmonic wave, which could meet operational requirements of inverter air-conditioner. © 2011 IEEE.

关键词： Air conditioning

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