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International Conference on communication technology (ICCT)

作者： Huan Li Wenhua Ye No.36 Research Institute of CETC Jiaxing Zhejiang China 2Science Technology on Communication Information Security Control Laboratory Jiaxing Zhejiang China

ISBN: (纸本)9781467370066

Frequency shift keying (FSK) modulation function in MATLAB without filter function, leading to poor adjacent channel suppression, which causes aliasing after a non-linear device easily. Based on FSK modulation signal generation principle, designing a better adjacent channel suppression function in this paper, which verified by demodulating through Agilent's vector signal analyzer (89600S), this function gets achieved more satisfactory results in the application of semi physical simulation.

关键词： MATLAB Frequency shift keying Interpolation Filtering Demodulation Modems

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Fast multi-level connected component labeling for large-scale images

Fast multi-level connected component labeling for large-scal...

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International Conference on Optoelectronics and Microelectronics (ICOM)

作者： Yuhai Li Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe Hebei P.R.China

Connected component (CC) labeling is time consuming during image segmentation and object identification, especially when input images are large-scale and binary converting uses multi-threshold. So in this paper, we present a fast multi-level CC labeling by combining online threshold segmentation and a one-pass labeling algorithm, also a detailed architecture for hardware implementation is proposed. During labeling, firstly a gray image is converted to several binary data flows with different thresholds. Then they are marked by run-length code respectively with 2× 2 scanning windows, in the meantime, the equal labels between two adjacent rows are obtained by these windows for CC merging. By executing this process until the end of input image, the CC labels are obtained after one-pass image scanning. Our method is tested on more than 1000 gray images which resolution are 1920×1080. Experimental results show that our algorithm can extract the positions and areas of CC in multi-threshold binary images at least 50 frames per second (fps) on a Stratix IV FPGA platform running at 109.7 MHz.

关键词： Labeling Memory management Random access memory Signal processing algorithms Algorithm design and analysis Hardware Image processing

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Experimental studies on beam quality-improving of 8μm ZGP optical parametric oscillator

Experimental studies on beam quality-improving of 8μm ZGP o...

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International Conference on Optoelectronics and Microelectronics (ICOM)

作者： Kuaikuai Yu Zhiqiang Liang Xiusheng Yan Science and Technology on Electro-Optical Information Security Control Laboratory Sanhe Hebei P. R. China

We report on experimental studies on the beam quality of the 8μm ZGP optical parametric oscillator(OPO). Through conducting a series of comparative experiments, the effects of resonator length, type of phase matching, resonant wavelength and structure of the resonator on the beam quality of ZGP OPO were studied respectively. By using longer resonator length (120mm), type I phase matching, longer resonant wavelength (8μm) and the ring cavity, the output with the beam quality factor of M 2 ~1.20 and 1.22 in the horizontal and vertical direction were achieved respectively. And this is a rather good beam quality level for 8μm ZGP OPO.

关键词： Laser beams Cavity resonators Optical resonators Crystals Optical frequency conversion Measurement by laser beam

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Power control algorithm based on dynamic particle swarm optimization in cognitive radio networks

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Journal of Computational information Systems 2015年第8期11卷 2863-2872页

作者： Chen, Lingling Zhao, Xiaohui Key Laboratory of Information Science College of Communication Engineering Jilin University Changchun China College of Information and Control Engineering Jilin Institute of Chemical Technology Jilin China

Most resource allocation algorithms are based on perfect channel and constant system parameters information in cognitive radio networks (CRNs). In order to adapt real communication environment, a dynamic particle swarm optimization (DPSO) power control algorithm based on underlay cognitive radio networks (CRNs) is presented to minimized total transmit power of SUs in consideration of three constraints, namely, interference temperature constraint of PUs, transmit power constraint of each SU, and constraint of minimum SINR at secondary receivers. The comparison of simulation result among DPSO algorithm, particle swarm optimization (PSO) and chaos particle swarm optimization (CPSO) algorithms is provided to show that DPSO can get minimum transmit power of SUs, fast convergence rate, and stability to cognitive radio networks under dynamical environment. ©, 2015, Binary information Press. All right reserved.

关键词： Power control

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Distributed power control algorithm in multiuser cognitive radio networks for minimizing interference to primary user

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Journal of Computational information Systems 2015年第5期11卷 1799-1808页

In order to guarantee quality of service (QoS) for secondary users (SUs) and primary users (PUs) in underlay cognitive radio networks (CRNs), the objective of this paper is to obtain minimum interference power to PUs under the constraints of the maximum allowable transmission power and the minimum signal to interference plus ratio (SINR) of each SU, which reduces the total interference from SUs to PUs and energy consumption of all SUs. An improved distributed power control algorithm (IDPCA) is proposed on the basis of standard distributed power control algorithm (SDPCA) from convex optimization theory. Simulation results show that the performance of two proposed algorithms are superior to the traditional iterative water filling algorithm (IWFA) in perfect and imperfect channel environment, and the improved algorithm is better than the standard distributed algorithm. Copyright © 2015 Binary information Press.

关键词： Convex optimization

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Low-Rank Tensor Constrained Multiview Subspace Clustering

Low-Rank Tensor Constrained Multiview Subspace Clustering

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International Conference on Computer Vision (ICCV)

作者： Changqing Zhang Huazhu Fu Si Liu Guangcan Liu Xiaochun Cao School of Computer Science and Technology Tianjin University Institute for Infocomm Research Technology and Research Singapore State Key Laboratory of Information Security Chinese Academy of Sciences School of Information and Control Nanjing University of Information Science and Technology

ISBN: (纸本)9781467383929

In this paper, we explore the problem of multiview subspace clustering. We introduce a low-rank tensor constraint to explore the complementary information from multiple views and, accordingly, establish a novel method called Low-rank Tensor constrained Multiview Subspace Clustering (LT-MSC). Our method regards the subspace representation matrices of different views as a tensor, which captures dexterously the high order correlations underlying multiview data. Then the tensor is equipped with a low-rank constraint, which models elegantly the cross information among different views, reduces effectually the redundancy of the learned subspace representations, and improves the accuracy of clustering as well. The inference process of the affinity matrix for clustering is formulated as a tensor nuclear norm minimization problem, constrained with an additional L2,1-norm regularizer and some linear equalities. The minimization problem is convex and thus can be solved efficiently by an Augmented Lagrangian Alternating Direction Minimization (AL-ADM) method. Extensive experimental results on four benchmark datasets show the effectiveness of our proposed LT-MSC method.

关键词： Tensile stress Correlation Clustering methods Minimization Kernel Optimization Aerospace electronics

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On the equivalence of LBlock and TWINE in structure

On the equivalence of LBlock and TWINE in structure

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International Conference on communications and Networking in China (CHINACOM)

作者： Zhen Ju Peiyuan Liu Weijia Xue Daoguang Mu Xuejia Lai Science and Technology on Communication Security Laboratory Chengdu China College of Information Security Shanghai Jiao Tong University China Department of Computer Science and Engineering Shanghai Jiao Tong University China

ISBN: (纸本)9781479987962

Feistel structure is widely used in the design of block ciphers. With many Feistel-type ciphers being designed, it is likely for some of them to have some similarity which can be shown in their differential characteristics or linear characteristics. Noticing two Feistel-type ciphers, LBlock and TWINE, have the same number of impossible differential chains using U-method without considering the details of S-boxes. In this paper, we first introduce a graph model to describe the topological structures of block ciphers, and then we prove the equivalence of LBlock and TWINE in structure using this model. Moreover, we present a matrix model for analyzing the similarity of two Feistel-type block ciphers.

关键词： Ciphers Encryption Indexes Analytical models Periodic structures Schedules

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Software design for high-speed data capture

Software design for high-speed data capture

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2014 2nd International Conference on Mechatronics, Robotics and Automation, ICMRA 2014

作者： Zhang, Wei Feng Science and Technology on Communication Information Security Control Laboratory Jiangnan Electronic Communication Institute Jiaxing Zhejiang China

ISBN: (纸本)9783038350781

10G Ethernet technology has been widely used in modern high speed communication system. As a result, program design for high-speed data capture on 10G Ethernet, as the first and important step in network monitor and analysis system, has become a challenging task. This paper proposed a high-speed data capture method based on WinCap and shared memory pool technology and has features of high speed, low packet loss rate, high efficiency and good portability. The system test and data analysis proved that the proposed method in this paper can effectively capture the data at speed of 6Gbps and stably keep the packet loss rate under 0.03%. © (2014) Trans Tech Publications, Switzerland.

关键词： Data acquisition

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Cooperative Transmission Against Impersonation Attack Using Inter-Session Interference in Two-Hop Wireless Networks 14th

Cooperative Transmission Against Impersonation Attack Using ...

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IEEE International Conference on Trust, security and Privacy in Computing and communications (TrustCom)

作者： Weidong Yang Le Xiao Limin Sun Qing Li Key Laboratory of Grain Information Processing and Control Ministry of Education Henan University of Technology Zhenzhou China College of Information Science and Engineering Henan University of Technology Zhenzhou China Beijing Key Laboratory of IOT information security technology Institute of Information Engineering Beijing China

ISBN: (纸本)9781467379533

The authentication error in Two-Hop wireless networks is considered without knowledge of eavesdropper channels and location. This paper presents an eavesdropper model with authentication error and two eavesdropping ways. In the model, the authentication error is expressed a pair(p_1, p_2). Based on the authentication error, a cooperative transmission protocol against impersonation attack is presented. Then, the number of eavesdroppers can be tolerated is analyzed while the desired secrecy is achieved with high probability in the limit of a large number of relay nodes. Final, we draw two conclusions for authentication error: 1) the impersonate nodes are chosen as relay is the dominant factor of the transmitted message leakage, and the impersonation attack does seriously decrease the number of eavesdroppers can be tolerated. 2) The Error authentication to legitimate nodes is almost no effect on the number of eavesdroppers can be tolerated.

关键词： Relays Authentication Protocols Interference Wireless networks Signal to noise ratio Transmitters

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Anonymous aggregator election protocol for wireless sensor networks

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Tongxin Xuebao/Journal on communications 2015年第2期36卷

作者： Fu, Shuai Ma, Jian-Feng Li, Hong-Tao Jiang, Qi School of Computer Science and Technology Xidian University Xi'an710071 China Science and Technology on Communication Information Security Control Laboratory Jiaxing314033 China

An anonymous cluster head election protocol in clustered wireless sensor networks was proposed. The protocol detailed the decision rules and mode of cluster construction while an anonymous veto protocol based on bilinear pairings was adopted to verify election results, ensuring the successful election of cluster heads. A corresponding anonymous data aggregation scheme was designed, through which data aggregation can be accomplished without revealing the identities of aggregators. Extensive analysis and simulation results show that the proposed protocol achieves anonymity, energy efficiency and security of cluster heads election simultaneously and can resist eavesdropping attacks, node compromise attacks and collusion attacks effectively. ©, 2015, Tongxin Xuebao/Journal on communications. All right reserved.

关键词： Wireless sensor networks

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