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Closed BER expression of multi-user DS UWB systemsin indoor fading channel

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Journal of Southeast University(English Edition) 2006年第1期22卷 16-20页

作者：樊祥宁黄勇富毕光国东南大学移动通信国家重点实验室南京210096

The bit error rate （BER） performance of multi-user direct spreading bi-phase shift keying （DSBPSK） direct impulse ultra wideband （UWB） systems is analyzed and simulated based on a statistical indoor multi-path fading channel model. The BER of the system is theoretically derived and given in closed form, which is expressed in terms of channel parameters and system parameters such as pulse width parameter, pulse repeat period, user number and pulse waveform. With this BER expression, the effect of these parameters on the system performance can be evaluated in a uniform way. Simulation results well match the theory numerical results, and prove that the multi-access interference （MAI） of DS-BPSK UWB is a normal distribution.

关键词： ultra wideband (UWB) direct spreading (DS) bi-phase shift keying (BPSK) multi-user fading channel performance analysis

Nonstationary Filtering for Markov Jumping Systems with fading channel and Multiplicative Noises

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Journal of Applied Mathematics and Physics 2021年第4期9卷 529-544页

作者： Yang Zhan Daijun Wei School of Science Hubei University for Nationalities Enshi China

This paper studies the nonstationary filtering problem of Markov jump system under l2 - l∞ performance. Due to the difference in propagation channels, signal strength and phase will inevitably change randomly and cause the waste of signals resources. In response to this problem, a channel fading model with multiplicative noise is introduced. And then a nonstationary filter, which receives signals more efficiently is designed. Meanwhile Lyapunov function is constructed for error analysis. Finally, the gain matrix for filtering is obtained by solving the matrix inequality, and the results showed that the nonstationary filter converges to the stable point more quickly than the traditional asynchronous filter, the stability of the designed filter is verified.

关键词： Markov Jumping System l2 - l∞ Performance fading channel Nonstationary Filtering Multiplicative Noises

NOISE REDUCTION FOR FAST fading channel BY RECURRENT LEAST SQUARES SUPPORT VECTOR MACHINES IN EMBEDDING PHASE SPACES

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Journal of Electronics(China) 2006年第6期23卷 926-928页

作者： Xiang Zheng Zhang Taiyi Sun Jiancheng Dept of lnformation and Communication Engineering Xi ＇an Jiaotong University Xi ＇an 710049 China

A new strategy for noise reduction of fast fading channel is presented. Firstly, more information is acquired utilizing the reconstructed embedding phase space. Then, based on the Recurrent Least Squares Sup-port Vector Machines (RLS-SVM), noise reduction of the fast fading channel is realized. This filtering tech-nique does not make use of the spectral contents of the signal. Based on the stability and the fractal of the cha-otic attractor, the RLS-SVM algorithm is a better candidate for the nonlinear time series noise-reduction. The simulation results shows that better noise-reduction performance is acquired when the signal to noise ratio is 12dB.

关键词： fading channel Noise reduction Support Vector Machines (SVM) Chaotic attractor

DoS Attack Power Allocation against Remote State Estimation via a Block fading channel

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DoS Attack Power Allocation against Remote State Estimation ...

Performance analysis of dual-hop UAV relaying systems over mixed fluctuating two-ray and Nakagami-m fading channels

第37届中国控制会议

作者： Heng Zhang Yanzheng Zhu Zhaojian Li Lidong He Wei Xing Zheng School of Science Huaihai Institute of Technology School of Computing Engineering and Math Western Sydney University Department of Mechanical Engineering Michigan State University School of Automation Nanjing University of Science and Technology

This paper studies the Denial-of-Service（DoS）attack power allocation issue, which aims to aggravate the quality of remote state estimation and save the expenditure of attack power concurrently. Different from the previous literature based on the assumption of time-invariant channel states,we consider the scenario that the observations are transmitted through a standard block fading communication channel. From viewpoint of the DoS attacker, we construct an optimization problem considering jointly the average estimation error and the attack power consumption. Then the framework of Markov decision process is employed to manifest the existence of optimal attack allocation strategy. Since the closed-form of the optimal attack strategy cannot be expressed directly, we restrain it to a specific attack policy to present the unclear part in the solution,and then provide a suboptimal attack power strategy. Finally,a simulation example is presented to show the effectiveness of our proposed attack strategy.

关键词： Remote State Estimation Denial-of-Service Power Allocation fading channel

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Science China(Information Sciences) 2021年第4期64卷 100-102页

作者： Yongshun ZHANG Jiayi ZHANG Kostas P.PEPPAS Bo AI School of Electronics and Information Engineering Beijing Jiaotong University The State Key Laboratory of Integrated Services Networks Xidian University Department of Informatics and Telecommunications University of Peloponnese State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University

Dear editor,Unmanned aerial vehicles (UAVs) perform a variety of civilian tasks, including disaster detection, weather forecasting and environmental monitoring. UAV-aided communications can provide flexible wireless connectivity for users without fixed infrastructures [1]. The fluctuating two-ray (FTR) distribution is regarded as a versatile and useful UAV channel fading model since it agrees well with experimental data of UAV communications [2].

关键词： Dual-hop relaying UAV fluctuating two-ray performance analysis fading channel

Anti-disturbance filter design for a class of stochastic systems with fading channels

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Science China(Information Sciences) 2020年第11期63卷 327-329页

作者： Yang LIU Zidong WANG Hongli DONG Hongjian LIU College of Electrical Engineering and Automation Shandong University of Science and Technology Department of Computer Science Brunel University London Institute of Complex Systems and Advanced Control Northeast Petroleum University School of Mathematics and Physics Anhui Polytechnic University

Dear editor,As a significant topic in control and signal processing communities, the filtering problem has been attracting persistent research attention in the past few decades [1]. In practical engineering, the parameter perturbations are unavoidable due mainly to exogenous disturbances, environmental changes and some other phenomena.

关键词： Stochastic systems fault detection model uncertainty anti-disturbance fading channel

Performance Analysis of LDPC on Rician fading channels

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Frontiers of Electrical and Electronic Engineering in China 2006年第1期1卷 120-124页

作者： LIN Jia-ru WU Wei-ling School of Information Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

This paper analyzes and simulates the performance of irregular low-density parity check(LDPC)codes on Rician fading *** authors also modified the brief propagation decoding algorithm,proved the symmetry and showed the stability conditions of the channels,and calculated the Shannon limits on Rician channels in this *** using Visual C++programming to simulate the performance,the result indicates that when code length N=3,072 and code rate R=1/3,the difference with the Shannon limit is about 2 ***,the performance of LDPC is also very effective on all kinds of channels,including the Rician kind.

关键词： LDPC fading channel Rician channels

ASYMPTOTIC PERFORMANCE ANALYSIS OF ARBITRARY RECTANGULAR QAM OVER fading channelS

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Journal of Electronics(China) 2009年第6期26卷 794-797页

作者： Lei Xianfu Fan Pingzhi Mathiopoulos P. Takis Institute of Mobile Communications Southwest Jiaotong University Chengdu 610031 China Institute for Space Applications and Remote Sensing National Observatory of Athens Metaxa and V. Pavlou 152 36 Penteli Athens Greece

In this paper,the asymptotic performance of arbitrary rectangular Quadrature Amplitude Modulation (QAM) signals over fading channels is investigated. A novel unified asymptotic average Symbol Error Probability (SEP) expression is derived in terms of diversity and coding gain. The validity and accuracy of the analytical result are verified by means of computer simulations. Furthermore,the results presented are very easy to be extended to the systems with multi-channel diversity receivers.

关键词： Quadrature Amplitude Modulation (QAM) fading channel Symbol Error Probability(SEP)

A Simple Capacity Formula for Correlated Diversity Rayleigh fading channels

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The Journal of China Universities of Posts and Telecommunications 2004年第Z1期11卷 37-39页

作者： CHENG Xing-qing~1, SU Shu-chun~2, LI Dao-ben~1 1.Beijing University of Posts and Telecommunications,Beijing 100876, P.R. China 2.Beijing Electronic Science Technology Institute,Beijing 100070, P.R. China Beijing University of Posts and Telecommunications Beijing 100876 P.R. China Beijing Electronic Science Technology Institute Beijing 100070 P.R. China

The system capacity can be considerably increased if we appropriately exploit the randomness of multipath propagation. A simple average capacity formula is derived for correlated diversity Rayleigh fading channels through linear transformation method. Numerical results that illustrate the effect of correlation parameter and diversity order on the diversity capacity are also presented.

关键词： channel capacity fading channel and wireless SIMO systems