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Chinese control Conference (CCC)

作者： Baohua Lu Liping Yan Hongxue Chen Yuanqing Xia Mengyin Fu Bo Xiao Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing China School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

In practical problems, the dynamic systems are usually nonlinear. In this case, the traditional Kalman filter cannot be used for state estimation or fault detection. The two typical extension based on Kalman filtering framework is the Extended Kalman Filter (EKF) and the Unscented Kalman Filter (UKF). Theoretically speaking, UKF is better than EKF when estimation accuracy is concerned, especially for high degree nonlinear cases. This paper is concerned with the state estimation and fault detection problem for a class of nonlinear dynamic systems. A novel fault detection and analyse method is presented based on the period residual of EKF and UKF. For different kind of faults, mainly, the system parameter error, the sensor/data error, EKF and UKF are used and the estimation and fault detection effects are compared and analyzed.

关键词： Fault detection Mathematical model State estimation Kalman filters Nonlinear systems Jacobian matrices

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Event-triggered State Estimation for Dynamics Networks with Stochastic Coupling under Uncertain Occurrence Probabilities

Event-triggered State Estimation for Dynamics Networks with ...

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第37届中国控制会议

作者： Hongxu Zhang Jun Hu Lei Zou Department of Applied Mathematics Harbin University of Science and Technology School of Measurement and Communication Harbin University of Science and Technology The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province Harbin University of Science and Technology School of Engineering University of South Wales College of Electrical Engineering and Automation Shandong University of Science and Technology

In this paper, we address the event-triggered state estimation problem for a class of time-varying complex networks subject to multiplicative noises and stochastic coupling under uncertain occurrence probability. The stochastic coupling is modeled by introducing a set of Bernoulli distributed random variables, where the uncertainties of the occurrence probability is characterized. Moreover, the event-triggered mechanism is employed with hope to reduce the network burden and save energy consumption. The aim of the paper is to design the robust state estimator for addressed dynamics networks and derive an optimized upper bound of the estimation error covariance by properly choosing the estimator gain. Finally, simulations and comparisons are provided to verify the validity of the proposed robust state estimation method.

关键词： Stochastic coupling networks State estimation Event-triggered mechanism Multiplicative noises Uncertain occurrence probability

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Blind Decoding for a Multi-cell Massive Antenna Array Uplink System

Blind Decoding for a Multi-cell Massive Antenna Array Uplink...

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International Conference on Information Systems and Computer Aided Education (ICISCAE)

作者： Han Yu L. Shen B.B. Yan The State Key Lab of Information Control Technology in Communication System of No.36 Research Institute China Electronic Technology Corporation JiaXing Zhejiang The School of Communications Engineering Hangzhou Dianzi University Hangzhou Zhejiang

ISBN: (纸本)9781538657393;9781538657386

In a multi-cell massive array multiple input multiple output (MIMO) uplink system, the pilot sequences reused in neighboring cells causes pilot contamination and decoding performance to degrade. In this paper, a blind decoding method based on independent component analysis (ICA) is proposed for a multi-cell massive antenna array system. The proposed blind decoding method uses ICA to separate the received signals (from in-cell and neighboring cells) and estimated channels, without using pilot sequence. Thus, pilot contamination is avoided and decoding performance will be optimized. Each user's angle-of-arrival (AOA) is estimated for recognizing the desired user signals and overcoming the uncertainty of signals separated by ICA. The analytical performance results of the blind decoding method are derived. Numerical results show that the proposed scheme has a better performance compared to MMSE decoding and blind decoding method based on singular value decomposition (SVD).

关键词： Antenna arrays Decoding Channel estimation Covariance matrices Partial transmit sequences Base stations

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Research of particle size identification based on blind source separation

Modelling, Measurement and Control A

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Modelling, measurement and control A 2017年第1期90卷 32-43页

作者： Wu, Juan Zhou, Zhen Yang, Xu Hu, Junlei College of Measure-Control Technology and Communication Engineering Harbin University of Science and Technology Harbin150040 China Shanghai Institute of Measurement and Testing Technology Shanghai China

Aiming at effectively identifyingthe different particle sizes of single particlesof the same kind and eliminating the interference of redundant and noise components in the light scatteringsignals, this paper puts forward a single particle size detection method by processing the light scatteringsignalsof particleswith blind source *** shown in the test results, the research object, a single-spherical PTFEpellet(4μm in particle size), contains noise and redundant angular intensity scattering signals. The scattering signals are decomposed into by empirical mode 8 components, which respectively serve as the virtual multi-source signals for blind source *** redundant noises in different channels are removed by the ICA algorithm to produce the noiseless and non-redundant light scattering signals. Such signals bear the information on the type of particles, and provide a reliable signal source for further, accurate measurement of particle size. It is demonstrated in the simulation experiment and the engineering example that the blind source separation method not only applies to identification of signal source, but also reduces the noise, improves the signal-to-noise ratio (SNR) of the signal, and suppresses the interference in the light scattering signals from redundant and nose components.

关键词： Blind source separation

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Investigating Correlation of Rough Surface Diffuse Scattering in Frequency Domain

Investigating Correlation of Rough Surface Diffuse Scatterin...

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European Conference on Antennas and Propagation, EuCAP

作者： Yang MIAO Mingming Gan Claude Oestges Katsuyuki Haneda Ke Guan Andrés Alayón Glazunov Wei Wang Yi Gong Dept. of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen China Universite catholique de Louvain Louvain-la-Neuve BE Institute of Information and Communication Technologies Electronics and Applied Mathematics (ICTM) Universit Catholique de Louvain Louvain-la-Neuve Belgium Dept. of Electronics and Nanoengineering Aalto University Espoo Finland State Key Lab of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China Dept. of Electrical Engineering University of Twente Enschede Netherlands School of Information Engineering Chang’an University Xi’an China

This paper investigates numerically the correlation function in the frequency domain due to diffuse scattering originated from rough surfaces. The scattered fields are computed by means of physical optics methods. The irregularities of the rough surface are modeled as a correlated Gaussian process. The correlation of the channel transfer function comprising only diffuse scattering components is analyzed. In the analysis, radio propagation channels comprising orthogonally oriented dipoles at the link ends are considered while assuming different Gaussian roughness profiles. This study offers a useful characterization of the channel behavior in a multipath-rich environment due to diffuse scattering. The presented results are of particular interest to wireless systems based on orthogonal frequency-division multiplexing.

关键词： Rough surfaces Surface roughness Correlation Optical surface waves Scattering Surface impedance Frequency-domain analysis

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Research on 4G And 5G Authentication Signaling

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Journal of Physics: Conference Series 2019年第4期1213卷

作者： Lei Song Zhan Xu Zhigang Tian Jinhui Chen Ruxin Zhi School of Information and Communication Engineering Beijing Information Science & Technology University Beijing China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China Key Laboratory of Modern Measurement & Control Technology Ministry of Education

In recent years, the development and standardization of 5G networks have received extensive attention. 3GPP officially confirmed that Service-Based Architecture (SBA) is the unified infrastructure of the 5G core network (5GC). The Service-Based Interface (SBI) is an important part of the SBA for interaction between network function services within the 5GC. The fifth generation mobile network will support a range of use cases and requirements that are completely different from traditional 4G networks, such as providing a high level of authentication mechanisms. This paper is organized as follows: First, we compare the difference between 4G authentication and 5G authentication in three aspects including the 4G architecture, authentication process, and communication protocol stack, then implement the simulation environment, and finally evaluate the performance by comparing the delay.

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A Reducing Iteration Orthogonal Matching Pursuit Algorithm for Compressive Sensing

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Tsinghua Science and technology 2016年第1期21卷 71-79页

作者： Rui Wang Jinglei Zhang Suli Ren Qingjuan Li School of Computer and Communication Engineering University of Science and Technology Beijing School of Computer and Control Engineering University of Chinese Academy of Sciences

In recent years, Compressed Sensing（CS） has been a hot research topic. It has a wide range of applications, such as image processing and speech signal processing owing to its characteristic of removing redundant information by reducing the sampling rate. The disadvantage of CS is that the number of iterations in a greedy algorithm such as Orthogonal Matching Pursuit（OMP） is fixed, thus limiting reconstruction ***, in this study, we present a novel Reducing Iteration Orthogonal Matching Pursuit（RIOMP） algorithm that calculates the correlation of the residual value and measurement matrix to reduce the number of *** conditions for successful signal reconstruction are derived on the basis of detailed mathematical *** compared with the OMP algorithm, the RIOMP algorithm has a smaller reconstruction error. Moreover, the proposed algorithm can accurately reconstruct signals in a shorter running time.

关键词： compressed sensing signal processing wireless sensor networks

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Study on LED color mixing for stage lighting based on locus fitting of blackbody

Study on LED color mixing for stage lighting based on locus ...

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2017 International Conference on Computer technology, Electronics and communication, ICCTEC 2017

作者： Ren, Hui Li, Shuwei Sun, Rongshu Su, Zhibin School of Information Engineering Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture Beijing Key Laboratory of Modern Entertainment Technology Beijing100024 China

ISBN: (纸本)9781538657843

Aiming at overcoming the defects of basic lighting color rendering for LED stage lighting, this paper establishes a new mixing light method with RGBW four-color mixing model. Compared with traditional tricolor light mixing model, it uses the mixing light of white as the fourth input, with the threebasic color of red, green and blue to obtain a new mixing method. Then the original coefficients of RGBW are optimized after adjusting the two parameters of relative spectral power distribution and illuminance of mixing light for locus fitting of blackbody. Finally, better color rendering of white light can be acquired. By the MATLAB simulation and field testing, experimental results have shown that the proposed method will achieve ideal LED lighting performance, which is convenient for color management of lighting control system in modern theatre. © 2017 IEEE.

关键词： Light emitting diodes

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Color-guided depth recovery based on ZED

Color-guided depth recovery based on ZED

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2017 International Conference on Computer technology, Electronics and communication, ICCTEC 2017

作者： Ren, Hui Gao, Nan Su, Zhibin School of Information Engineering Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Ministry of Culture Beijing Key Laboratory of Modern Entertainment Technology Beijing100024 China

ISBN: (纸本)9781538657843

Depth maps obtained by RGB-D cameras such as ZED are noisy, and there are invalid areas where depth values absent in the maps, which will affect the subsequent improved processing. This paper investigates the restoration and optimization of degraded depth image method based on RGBD data captured by ZED by means of selective filtering and conditional auto-regressive model with edge constraints. Firstly, we divide invalid areas into two categories, including the internal invalid areas caused by reflection and invalid edge caused by occlusion. Then, we use corresponding median filter and mean filter in the different selective areas to obtain the initial restored depth map with no empty area. The edges of objects contain massive information, therefore, an adaptive auto-regressive (AR) model is used to further optimize the depth of the edge area. Additionally, we add the edge information to the sampled image to maintain local detail. Experiments show that with the proposed method we can recover the depth data with high accuracy and effectiveness. © 2017 IEEE.

关键词： Median filters

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A framework for comparing concept maps 16

A framework for comparing concept maps

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16th International Conference on Information technology Based Higher Education and Training, ITHET 2017

作者： Limongelli, Carla Sciarrone, Filippo Lombardi, Matteo Marani, Alessandro Temperini, Marco Engineering Department Roma Tre University Rome Italy School of Information and Communication Technology Griffith University QLD Australia Department of Computer Control and Management Engineering Sapienza University of Rome Rome Italy

ISBN: (纸本)9781538639689

Concept maps are at the base of teaching activity and they are widely used in the process of creating courses. In the perspective of reusing learning materials, we could do the same (reuse) also with concept maps. Unfortunately concepts maps are hard to compare in an educational setting, as most of the algorithms applied to this task work mainly on structural similarity, and may take into limited account pedagogical issues. In this work, we consider some measures that take into consideration both structural and didactic aspects of the concept maps, such as the prerequisite relation and the commonality of concepts, and present a framework that allows teacher to draw and/or compare her concept map with maps proposed by other teachers, in order to highlight common pedagogical aspects. © 2017 IEEE.

关键词： Education Ontologies Weight measurement Electronic mail Tools Software measurement

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