检索结果-内蒙古大学图书馆

International Conference on Electronics Information and Emergency Communication

作者： Fei Zhuo Yuanling Huang Jian Chen Science and Technology on Blind Signal Processing Laboratory Chengdou China

ISBN: (纸本)9781509019984

Specific Emitter Identification (SEI) is the technique that identifies the individual radio emitter using the Radio Frequency Fingerprint (RFF), which are originated from the imperfections and differences of transmitters. Previous SEI techniques are sensitive to noise and need enough sampled points. In this paper, a novel SEI approach to extracting fingerprint features of energy envelope of transient signals is proposed. A linear system model is utilized to fit the energy envelope, and the fingerprinting features are constructed by the polynomial coefficients estimated with least-squares algorithm. The results of experiments on actual burst signals demonstrate that the method is effective.

关键词： Feature extraction Transient analysis Fingerprint recognition Linear systems Radio transmitters Transforms Wireless communication

来源：评论

学校读者我要写书评

暂无评论

A New Heterogeneous Collaborative Detection Method Based on Time Difference of Arrival and Direction of arrival by the Fuzzy Evidence Theory

A New Heterogeneous Collaborative Detection Method Based on ...

引用

International Congress on Image and signal processing, BioMedical Engineering and Informatics

作者： Jiaxu Yu Zhengbo Sun Qing He Huafeng Peng Science and Technology On Blind Signal Processing Laboratory Chengdu China 610041

ISBN: (纸本)9781509037117

A new collaborative detection method of TDOA (Time Difference of Arrival) and DOA ( Direction of arrival) has been proposed for weak signals. The fuzzy evidence theory is used to fuse the peaks of TDOA correlation and the spatial spectrum of MUSIC (Multiple signal Classification). In the paper, the TODA/DOA collaborative detector is designed, the basic probability assignment fuction (mass fuction or BPA fuction) and the membership fuction are used to express the uncertainty of the TDOA and DOA information. Then the information is fused by the D-S combination formula and the rule of game probability distribution is used to get the detection result. At last, the simulation results show that the performance of the detector is better than the traditional TDOA correlation detector.

关键词： fuzzy evidence theory correlation detection TDOA DOA MUSIC collaborative detection

来源：评论

学校读者我要写书评

暂无评论

A new recognition and classification algorithm of underwater acoustic signals based on multi-domain features combination

A new recognition and classification algorithm of underwater...

引用

IEEE/OES China Ocean Acoustics (COA)

作者： Huan Shi Jinyu Xiong Chenyang Zhou Su Yang National Key Laboratory of Science and Technology on Blind Signal Processing China

A new algorithm is proposed in this paper to recognize and classify underwater acoustic signals including underwater acoustic communication signals, active sonar signals, ship-radiating noise and burst ocean ambient noise. The paper firstly analyzed the features of underwater acoustic signals in time domain, frequency domain and cyclostationarity domain. At the same time, the way of extracting features about these signals is researched. This algorithm combines the features above and chooses a decision tree classifier to realize the recognition and classification of different underwater acoustic signals. Finally, the effectiveness in different multipath channels is evaluated by simulation. The results have shown that this algorithm is capable of recognizing and classifying different underwater acoustic signals with better performance than algorithms using features in only one domain; and, its performance is robust in a multipath fading environment.

关键词： Analytical models Read only memory

来源：评论

学校读者我要写书评

暂无评论

Optimal Estimation of Sensor Biases for Asynchronous Multi-Sensor Data Fusion

arXiv

引用

arXiv 2017年

作者： Pu, Wenqiang Liu, Ya-Feng Yan, Junkun Liu, Hongwei Luo, Zhi-Quan National Laboratory of Radar Signal Processing Collaborative Innovation Center of Information Sensing and Understanding Xidian University Xi'an710071 China State Key Laboratory of Scientific and Engineering Computing Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China Shenzhen Research Institute of Big Data Chinese University of Hong Kong Shenzhen518100 China

An important step in a multi-sensor surveillance system is to estimate sensor biases from their noisy asynchronous measurements. This estimation problem is computationally challenging due to the highly nonlinear transformation between the global and local coordinate systems as well as the measurement asynchrony from different sensors. In this paper, we propose a novel nonlinear least squares (LS) formulation for the problem by assuming the existence of a reference target moving with an (unknown) constant velocity. We also propose an efficient block coordinate decent (BCD) optimization algorithm, with a judicious initialization, to solve the problem. The proposed BCD algorithm alternately updates the range and azimuth bias estimates by solving linear least squares problems and semidefinite programs (SDPs). In the absence of measurement noise, the proposed algorithm is guaranteed to find the global solution of the problem and the true biases. Simulation results show that the proposed algorithm significantly outperforms the existing approaches in terms of the root mean square error (RMSE). Copyright © 2017, The Authors. All rights reserved.

关键词： Mean square error

来源：评论

学校读者我要写书评

暂无评论

Construction of One-Gray Weight Codes and Two-Gray Weight Codes over Z4+uZ4

引用

Journal of Systems science & Complexity 2016年第5期29卷 1472-1484页

作者： SHI Minjia WANG Dandan GAO Jian WU Bo Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei 230039 China National Mobile Communications Research Laboratory Southeast University Nanjing 210096China School of Mathematical Sciences Anhui University Hefei 230601 China. School of Science Shandong University of Technology Zibo 255091 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Bcijing 100093 China

This paper firstly gives some necessary conditions on one-Gray weight linear codes. And then we use these results to construct several classes of one-Gray weight linear codes over Z_4 +uZ_4(u^2=u) with type 16^(k_1)8^(k_2)8^(k_3)4^(k_4)4^(k_5)4^(k_6)2^(k_7)2^(k_8) based on a distance-preserving Gray map from(Z4 + u Z4)n to Z2n4. Secondly, the authors use the similar approach to do works on two-Gray(projective) weight linear codes. Finally, some examples are given to illustrate the construction methods.

关键词： Generator matrix Gray map linear code one-Gray weight code two-Gray weight code

来源：评论

学校读者我要写书评

暂无评论

Biased decoy-state reference-frame-independent quantum key distribution

arXiv

引用

arXiv 2017年

作者： Zhu, Jian-Rong Zhang, Chun-Mei Guo, Guang-Can Wang, Qin Institute of Signal Processing Transmission Nanjing University of Posts and Telecommunications Nanjing210003 China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing210003 China Key Laboratory of Quantum Information CAS University of Science and Technology of China Hefei230026 China

Without actively aligning the reference frames, the reference-frame-independent quantum key distribution (RFI-QKD) can generate secure keys even when the reference frames drift slowly. Here, we propose a new scheme on the decoy-state RFI-QKD, where the basis assignments of two legitimate parties are biased, reducing the fraction of mismatched-basis data. When accounting for statistical fluctuations under different misalignments of reference frames, we investigate the performance of biased decoy-state RFI-QKD with full parameter optimization. We also make a clear comparison between the new scheme with other practical schemes, e.g., unbiased decoy-state RFI-QKD and biased decoy-state BB84-QKD. Simulation results demonstrate that the new proposed biased decoy-state RFI-QKD can significantly improve the performance (secret key rate and secure transmission distance) of practical QKD systems. Copyright © 2017, The Authors. All rights reserved.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

Multiway Dynamic Trust Chain Model on Virtual Machine for Cloud Computing

引用

China Communications 2016年第7期13卷 83-91页

作者： Jie Zhu Guoyuan Lin Fucheng You Huaqun Liu Chunru Zhou School of Computer Science and Technology China University of Mining&TechnologyXuzhou 221116China State Key Laboratory for Novel Software Technology hosted at Nanjing University Nanjing 210093China Information Engineering School of Beijing Institute of Graphic Communication Beijing 102600China Beijing Key Laboratory of Signal and Information Processing for High-end Printing Equipment Beijing Institute of Graphic CommunicationBeijing 100026China Information Security Center Beijing University of Posts and TelecommunicationsBeijing 100876China Nanjing University of Information Science&Technology Nanjing 210044China

This paper sums up four security factors after analyzing co-residency threats caused by the special multitenant environment in the *** secure the factors,a multiway dynamic trust chain transfer model was proposed on the basis of a measurement interactive virtual machine and current behavior to protect the integrity of the system.A trust chain construction module is designed in a virtual machine *** dynamic monitoring,it achieves the purpose of transferring integrity between virtual machine.A cloud system with a trust authentication function is implemented on the basis of the model,and its practicability is shown.

关键词： cloud computing virtual machine trustworthiness measurement dynamic trust transfer

来源：评论

学校读者我要写书评

暂无评论

Research on the fractal model and calibration of the aerosol mass concentration measurement based on the particle group light scattering

引用

Chinese Optics Letters 2016年第11期14卷 104-109页

作者：顾芳刘毅张加宏陈云云崔芬萍 School of Physics and Optoelectronic Engineering Nanjing University of Information Science and Technology School of Electronic & Information Engineering Nanjing University of Information Science and Technology Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology Nanjing University of Information Science and Technology Jiangsu Key Laboratory of Meteorological Observation and Signal Processing Nanjing University of Information Science and Technology

In order to improve the inversion precision ot aerosol mass concentrations based on the particle group light scattering method,the concept that particles through a laser beam are equivalent to an aggregate is proposed.A fractal model for aerosol mass concentration using the signal amplitude distribution of aggregates is presented,and then the subsection calibration method is *** experimental results show that the mass concentrations in versed by this model agree well with those measured by the norm-referenced *** average relative errors of the two experiments are 5.6%and 6.0%,respectively,which are less than those obtained by the conventional inversion model.

关键词： Aerosols Aggregates Calibration Fractals Laser beams

来源：评论

学校读者我要写书评

暂无评论

Ideal magnetic dipole scattering

arXiv

引用

arXiv 2017年

作者： Feng, Tianhua Xu, Yi Zhang, Wei Miroshnichenko, Andrey E. JNU-IREE Joint Laboratory of Fractal Method and Signal Processing Department of Electronic Engineering College of Information Science and Technology Jinan University Guangzhou510632 China Key Laboratory of Optoelectronic Information and Sensing Technologies Guangdong Higher Education Institutes Guangzhou Guangdong510632 China Nonlinear Physics Centre Research School of Science and Engineering Australian National University ActonACT2601 Australia

We introduce the concept of tunable ideal magnetic dipole scattering, where a nonmagnetic nanoparticle scatters lights as a pure magnetic dipole. High refractive index subwavelength nanoparticles usually support both electric and magnetic dipole responses. Thus, to achieve ideal magnetic dipole scattering one has to suppress the electric dipole response. Such a possibility was recently demonstrated for the so-called anapole mode, which is associated with zero electric dipole scattering. By overlapping magnetic dipole resonance with the anapole mode we achieve ideal magnetic dipole scattering in the far-field with tunable high scattering resonances in near infrared spectrum. We demonstrate that such condition can be realized for two subwavelength geometries. One of them is core-shell nanosphere consisting of Au core and silicon shell. It can be also achieved in other geometries, including nanodisks, which are compatible with current nanofabrication technology. Copyright © 2017, The Authors. All rights reserved.

关键词： Infrared devices

来源：评论

学校读者我要写书评

暂无评论

Joint elastic and petrophysical inversion using prestack seismic and well log data

Joint elastic and petrophysical inversion using prestack sei...

引用

作者： Li, Zhiyong Song, Beibei Zhang, Jiashu Hu, Guangmin School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu Sichuan611731 China Sichuan Key Laboratory of Signal and Information Processing Southwest Jiaotong University Chengdu Sichuan610031 China

Seismic inverse problems aim to infer the properties of subsurface geology, such as elastic and petrophysical properties. Existing seismic inversion methods for the joint estimation of these properties are mainly based either on Gassmann theory for prestack seismic data processed with stochastic optimisation techniques or on the Wyllie formula for poststack seismic data processed by deterministic optimisation techniques. The purpose of this study is to develop a strategy for the joint estimation of elastic and petrophysical properties from prestack seismic data based on Gassmann equations with deterministic optimisation techniques. Given poor-quality prestack seismic data, two regularisation parameters are introduced to control the trade-off between fidelity to the data and the smoothness of the solution. An appropriate linearised system of equations for the joint model update is derived from Newton's method, which fits seismic data, the description of the rock physics medium and prior information, simultaneously. We show the preliminary results obtained with the proposed framework for synthetic and real data examples. © ASEG 2016.

关键词： Newton-Raphson method

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：