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The Study on Two Kinds of Modified lMS Equalizers for Underwater Acoustic communication

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The Study on Two Kinds of Modified LMS Equalizers for Underw...

2011 IEEE International Conference on information Theory and information Security(ICITIS 2011)

作者： Jing Gang 1) ,2) , Jinxiang Fen g3) , Hui Zhou 3) , Yu Yuan 3) , Jing Wuan 3),4) ,* 1) 750 Test Range, china Shipbuilding Industry Corporation, Kunming, china 2) school of Marine engineering, Northwestern Polytechnical university, Xi’an, china 3) school of information Science and engineering, yunnan university, Kunming, china 4) Institute of Acoustics, Chinese Academy of Sciences, beijing, china

It is necessary to add an equalizer to reduce the serious inter-symbol interference (ISI) caused by the multipath effect of underwater acoustic communication (UAC) in order to improve the quality of UAC. The traditional lMS equalizer (lMSE) is suitable only for the situation where the channel environment is statistically stationary. This tends to limit its application in UAC because its convergence and tracking capabilities are both declined. This paper studies two kinds of modified lMS equalizers, variable step size lMS equalizer (VlMSE) and variable step size lMS decision feedback equalizer (VlMSFE), which can improve the convergence of the traditional lMS equalizer and reduce the error code rate greatly, thus improve the quality of UAC system. Theoretical analysis and computer simulation supports the above conclusion.

关键词： UAC ISI VlMSE VlMSDFE

Rectangle blocking matrices based unitary multistage Wiener reduced-rank joint detection algorithm for multiple input multiple output systems

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Science china(information Sciences) 2010年第10期53卷 2116-2126页

作者： REN PinYi 1 , WANG Rui 2 & ZHANG ShiJiao 1 1 school of Electronic engineering, Xi’an Jiaotong university, Xi’an 710049, china 2 Xi’an Monitoring Station, The State Administration of Radio Film and Television, Xi’an 710101, china school of Electronic engineering Xi’an Jiaotong University Xi’an China Xi’an Monitoring Station The State Administration of Radio Film and Television Xi’an China

Traditional equalization algorithms for multiple input multiple output (MIMO) systems suffer from high complexity and low convergence rate. So an improved adaptive reduced-rank joint detection algorithm of multistage Wiener filter (MSWF) based on rectangle blocking matrices is proposed. The MSWF is implemented by the correlation subtraction algorithm (CSA) structure and is called unitary multistage Wiener filter (UMSWF). The new scheme adopts rectangle submatrix as blocking matrix, which is chosen from the square blocking matrix for UMSWF. The proposed algorithm can reduce the size of the observation data vectors step by step in the forward recursion decomposition of UMSWF. Thus, the computational complexity is reduced and the convergence rate is increased. Theoretical analysis and simulation results show that this improved adaptive reduced-rank joint detection algorithm of UMSWF based on rectangle blocking matrix has better performance such as lower complexity and faster convergence rate. In particular, simulations are conducted in the verticalBell labs layered space-time (V-BlAST) system which adopts BPSK modulation, where 4 and 8 antennas are equipped at the transmitter and receiver, respectively. Compared with traditional equalization algorithm based on UMSWF, our new method can achieve the same BER performance at high SNR with only 0.5 times that of computational complexity.

关键词： multiple input multiple output (MIMO) systems unitary multistage Wiener filter (UMSWF) joint detection blocking matrix

The In-Flight Realtime Trigger and localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-yun Zhao Shao-lin Xiong xiang-Yang Wen Xin-Qiao li Ce Cai Shuo Xiao Qi luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan liao Yan-Qiu Zhang Yue Huang lu li Xing Wen Fei Zhang Jing Duan Chen-Wei Wang Dong-li Shi Peng Zhang Qi-Bin Yi Chao-Yang li Yan-Bing Xu Xiao-Hua liang Ya-Qing liu Da-li Zhang Xi-lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng Yang Xiao-Jing liu Min Gao Mao-Shun li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong liu Xing-Bo Han Jin-ling Qi Jia Huang Ke-Ke Zhang Can Chen Xiong-Tao Yang Dong-Jie Hou Yu-Sa Wang Rui Qiao xiang Ma Xiao-Bo li Ping Wang Xin-Ying Song li-Ming Song Shi-Jie Zheng Bing li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-jun Wang Yan-Chao Hao xiang-Yu Wang Zong-Yuan Yang Zhi-long Wen Zhi Chang Yuan-Yuan Du Rui Gao Xiao-Fei lan Yan-Guo li Gang li Xu-Fang li Fang-jun lu Hong lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China school of information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun university of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

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Asymmetrical Bell state analysis for photon-atoms hybrid system

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Science china(Physics,Mechanics & Astronomy) 2019年第12期62卷 10-18页

作者： Yi-lin liu Miao-Wei Wang Chun-Yu Bai tie-jun Wang school of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key laboratory of information Photonics and Optical communications Beijing University of Posts and TelecommunicationsBeijing 100876China

Bell-state analysis(BSA) has great application in the quantum communication. To our best knowledge, the current works are devoted to the physical realization of symmetrical 2×2-dimensional or 2^N× 2^N-dimensional 2-qudit BSA, and there is no work focused on the physical realization of the asymmetrical high-dimensional(for example 3×4-dimensional 2-qudit) Bell-states complete analysis. In this paper, by using the nonlinear interaction between the atoms and photons, we propose a scheme to completely distinguish the asymmetrical 3×4-dimensional 2-qudit Bell states of a hybrid system. We use the quantum information splitting, which is exploited to resolve the degree-mismatch issue in the quantum state sharing schemes, as an example to show the application of the asymmetrical BSA. Finally, we discuss its possible realization with current experimental techniques. Our asymmetrical high-dimensional BSA protocol may pave a new way for high-capacity long-distance quantum communication.

关键词： quantum optics quantum information processing quantum cryptography

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A transformer generative adversarial network for multi-track music generation

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CAAI Transactions on Intelligence Technology 2022年第3期7卷 369-380页

作者： Cong Jin Tao Wang Xiaobing li Chu Jie Jiessie tie yun tie Shan liu Ming Yan Yongzhi li junxian Wang Shenze Huang school of information and communication engineering Communication University of ChinaBeijingChina school of information and engineering Zhengzhou UniversityZhengzhouChina Central Conservatory of Music BeijingChina Department of computer Science University of TorontoTorontoCanada school of Data Science and Media Intelligence Communication University of ChinaBeijingChina school of light Industry and engineering South China University of TechnologyGuangzhouChina school of Animation and Digital Arts Communication University of ChinaBeijingChina

This study proposes a new generation network based on transformers and guided by the music theory to produce high-quality music *** this study,the decoding block of the transformer is used to learn the internal information of single-track music,and cross-track transformers are used to learn the information amongst the tracks of different musical instruments.A reward network based on the music theory is proposed,which optimizes the global and local loss objective functions while training and discriminating the network so that the reward network can provide a reliable adjustment method for the generation of the *** method of combining the reward network and cross entropy loss is used to guide the training of the generator and produce high-quality music *** with other multi-track music generation models,the experimental results verify the validity of the model.

关键词： artificial intelligence deep learning multimedia

Improvement and Formal Analysis of Mobile Micro-Payment Protocol Payword

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Improvement and Formal Analysis of Mobile Micro-Payment Prot...

2011 IEEE International Conference on information Theory and information Security(ICITIS 2011)

作者： Xuan Zhou 1) Xueming Wang 2) school of Computer Science and information Guizhou university Guiyang Guizhou china

To overcome the shortage which is that mobile micro payment protocol Payword dissatisfies non-repudiation,improved mobile micro payment protocol Payword is *** with Payword,improved Payword has better security and *** order to validate improved Payword micro-payment protocol whether meeting nonrepudiation,SVO logic is expanded and *** micro-payment protocol is formally analyzed and proved with expanded SVO *** analysis results show that the improved micro-payment protocol satisfies non-repudiation.

关键词： mobile payment micro-payment protocol SVO logic protocol analysis non-repudiation

The Application of Fuzzy Clustering in Teacher-Evaluating Model

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The Application of Fuzzy Clustering in Teacher-Evaluating Mo...

2009 IEEE International Symposium on IT in Medicine & Education(ITME2009)

作者： SHI Nian-yun CHEN Kun lI Chun-hua 1.school Of Computer Science And communication engineering china university Of Petroleum Dongying 257062 P.R.china 2.Geophysical Research Institute of Shengli Oil Field Dongying 257061 P.R.china

In existing teacher-evaluating model,teachers are ranked according to the weighted average score given by students based on the instruction *** it can reflect the teaching standard in a manner,yet it cannot discover the implicit information in data,such as some teachers are standout in some *** more,teachers cannot be sorted by a certain index in this method,which lacks for a more in-depth analysis for sorting *** this paper,a new method is proposed based on the existing teacher-evaluating *** taking fuzzy clustering into consideration,this method analyzes existing data deeply to discover the rules implicit in data,and then gives a division of fuzzy equivalence *** each class has a reasonable evaluation and interpretation which can be as an authority for evaluating teaching standard.

关键词： Fuzzy Clustering The Teacher-Evaluating Model

A Feature-based Robust Digital Image Watermarking Against Desynchronization Attacks

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International Journal of Automation and computing 2007年第4期4卷 428-432页

作者： xiang-Yang Wang jun Wu school of Computer and information Technique Liaoning Normal University Dalian 116029 PRC State Key laboratory of Vision and Auditory information Processing Peking University Beijing 100871 PRC

In this paper, a new content-based image watermarking scheme is proposed. The Harris-laplace detector is adopted to extract feature points, which can survive a variety of attacks. The local characteristic regions （lCRs） are adaptively constructed based on scale-space theory. Then, the lCRs are mapped to geometrically invariant space by using image normalization technique. Finally, several copies of the digital watermark are embedded into the nonoverlapped lCRs by quantizing the magnitude vectors of discrete Fourier transform （DFT） coefficients. By binding a watermark with lCR, resilience against desynchronization attacks can be readily obtained. Simulation results show that the proposed scheme is invisible and robust against various attacks which includes common signals processing and desynchronization attacks.

关键词： Image watermarking desynchronization attacks feature points discrete Fourier transform.

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A New Mathematic Method for Fingerprint Identification

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A New Mathematic Method for Fingerprint Identification

2011 IEEE International Conference on information Theory and information Security(ICITIS 2011)

作者： Zhao Ma 1) Ren Gao 2) 1) school of Computer Science china university of Geosciences Wuhan P.R.china 2) Department of Electronic engineering Hubei university of Economics Wuhan china

Fingerprint identification technology is an important technology in the areas of network security and identity *** paper studies on fingerprint identification by using a new mathematic method of binary function and its partial derivative and directional *** method not only emphasizes on the characteristic of fingerprint,but also concerns about the singularity characteristic of fingerprint images,which increases the accuracy of fingerprint *** the end of the paper,simulation was done to test the algorithm with the use of Matlab,thereby the feasibility and rationality of the method were confirmed.

关键词： Identity authentication fingerprint identification binary function partial derivative directional derivative