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检索条件"机构=School of Measurement and Control Technology and Communication Engineering"

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New blind equalization schemes based on constant cross algorithm

New blind equalization schemes based on constant cross algor...

引用

2008 11th IEEE International Conference on communication technology, ICCT 2008

作者： Shun-Lan, Liu Jian-Hong, Hu Ming-Zeng, Dai School of Communication Engineering Hangzhou Dianzi University Hangzhou 310018 China National Laboratory of Information Control Technology for Communication System Jiaxing 314033 China

ISBN: (纸本)9781424422517

In this work, we present two new blind equalization schemes suitable for transmitting cross cross-QAM signals. Based on the framework of constant cross algorithm (CXA), a modified CXA (MCXA) is obtained by adding a constellation-matched error (CME) term to the cost function of the CXA. For the MCXA, the CXA term provides global convergence and the CME term helps to decrease the residual error and accelerate convergence. Furthermore, we propose a decision-directed version of the MCXA, called DD-MCXA, which can improves the performance of the MCXA. Preserving the good initial convergence characteristics of the CXA, the DD-MCXA automatically decreases the effect of the CXA errors when the equalizer is near convergence. Both simulation and analysis demonstrate the good performance of the proposed schemes. © 2008 IEEE.

关键词： Blind equalization

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A contact-type tensionmeter for hot rolling mills

A contact-type tensionmeter for hot rolling mills

引用

4th International Symposium on Precision Mechanical measurements

作者： Zhao, Xiaoyan Zhang, Zhaohui Sun, Yikang Wang, Jun Que, Cheng School of Information Engineering University of Science and Technology Beijing Beijing 100083 China Department of Measurement and Control Technology and Instrumentation Beijing Information Science and Technology University Beijing 100085 China

To improve the hot rolled strip quality and operational stability, a novel tensionmeter based on lever principle is developed which inspects latent waves and provides real references for flatness control in hot rolling process. The contact-type tensionmeter including two segmented rolls can get the transverse tension distribution along the strip width. Tension profile is deduced by different ratio of four force values from the embedded force sensors in tensionmeter system. The compact mechanical structure ensures the tensionmeter's robust stability in hot rolling process, standard hardware and software for data acquisition make the system easy to operate and maintain. The trails have proven tensionmeter successful in improving both strip flatness and mill performance. © 2008 SPIE.

关键词： Data acquisition

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A fast motion estimation algorithm based on diamond and line/triangle search patterns

A fast motion estimation algorithm based on diamond and line...

引用

2008 3rd International Conference on Pervasive Computing and Applications, ICPCA08

作者： Yun, Cheng Min, Wu School of Information Science and Engineering Central South University Changsha China Department of Communication and Control Engineering Hunan Institute of Humanities Science and Technology Loudi China

ISBN: (纸本)9781424420209

Based on the directional characteristic of SAD(Sum of Absolute Difference) distribution and the center-biased characteristic of motion vectors, a fast BMA(blockmatching motion estimation algorithm), DLTS(Diamond Line/Triangle Search), is proposed in this paper. DLTS employs line search pattern(LP) or triangle search pattern(TP) adaptively according to the distance between the MBD(Minimum Block Distortion) and SMBD(Second MBD) points to locate the best matching block with large motion vector, and diamond search pattern(DP) to refine the motion vector. Although the proposed DLTS can also be trapped in local minima, the experimental results show that it is faster than DTS(Diamond Triangle Search) and its encoding efficiency is almost the same as that of DTS. © 2008 IEEE.

关键词： Motion estimation

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Research of rotatable single camera object localization based on man height model in visual surveillance

Research of rotatable single camera object localization base...

引用

2nd International Conference on Bioinformatics and Biomedical engineering, iCBBE 2008

作者： Qi, Mei-Bing Zhang, Rui Jiang, Jian-Guo Li, Xiang-Tao School of Computer and Information Hefei University of Technology Hefei 230009 China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei 230009 China

ISBN: (纸本)9781424417483

A method of object localization of rotatable single-camera in visual surveillance is proposed by the method of updating fixed man height model which is an effective method to solve object localization in fixed single-camera visual surveillance. Because of the rotation of the camera the parameter of height model and sample change which can be updated with the angle of the rotation known beforehand. The original parameters and the angel were combined in this algorithm to solve the update with two approach of pitching and pan respectively. Experiments with simulated data show that the technique is simple and accurate. © 2008 IEEE.

关键词： Monitoring

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A care communication system with space sharing function

A care communication system with space sharing function

引用

22nd International Conference on Advanced Information Networking and Applications, AINA 2008

作者： Koyama, Akio Takenaka, Yosuke Arai, Junpei Barolli, Leonard Department of Informatics Graduate School of Science and Engineering Yamagata University Japan Department of Information and Control Engineering Yamagata College of Industry and Technology Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Japan

ISBN: (纸本)0769530958

Recently, there are a lot research works for multimedia communication systems. Especially, the space sharing communication is one of research trends for multimedia communication. By using the space sharing technology, the users feel as they are in the same space, even if they are in different locations. This can be done taking each video image of two remote points into one space. In this paper, we propose a care communication system with space sharing function. The implemented care communication system supports the communication and information sharing among in-patients, family members, doctors and helpers. In the proposed system, we have developed not only integration of two video images but also a warmth transmission function. By using this function, two persons in different locations can transmit their feelings as they are in the same space. We verified the proposed system effectiveness by conducting some experiments. © 2008 IEEE.

关键词： Information dissemination

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Behaviour reasoning and tracking for mobile objects based on projection and occlusion ratios

Behaviour reasoning and tracking for mobile objects based on...

引用

2008 Chinese Conference on Pattern Recognition, CCPR 2008

作者： Lu, Hong Fei, Shumin Zhang, Tao Li, Tao Zheng, Jianyong School of Automation Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Nanjing 210096 China School of Automation Nanjing Institute of Technology Nanjing 211167 China School of Electrical Engineering Southeast University Nanjing 210096 China

ISBN: (纸本)9781424423163

Object states estimation and data association are main facets of multi-object tracking. Under complex situations, one object often grouped with others, or occluded by other objects or background, which can increase the difficulty in data association and behaviour reasoning, and even result in being hard to maintain track. To cope with these problems, a new behaviour reasoning and tracking method is proposed. A scene mode is built firstly simulating public transport environment. Then, Kalman filter is used to estimate the object position and bounding box. Then, the center-association based projection ratio and region-association based occlusion ratio are defined and combined to reason and classify object behaviours. Finally, an adaptive tracking scheme aiming at special behaviours (e.g. merging, and static occlusion) is proposed to validate our reasoning method. Experimental results show that the proposed method is efficient. ©2008 IEEE.

关键词： Kalman filters

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A fast mode decision algorithm of 44 block intra prediction for H.264/AVC

A fast mode decision algorithm of 44 block intra prediction ...

引用

Proceedings of 2008 3rd International Conference on Intelligent System and Knowledge engineering, ISKE 2008

作者： Cheng, Yun Wu, Min School of Information Science and Engineering Central South University 410083 Changsha China Department of Communication and Control Engineering Hunan Institute of Humanities Science and Technology 417000 Loudi China

ISBN: (纸本)9781424421978

It is well known that H.264/AVC has great advantage of coding efficiency compared with the successful prior coding standards and it can save about 50% bit-rate under the same reconstructed picture quality. But the complexity of H.264/AVC encoder is also very high and it limits the application of H.264/AVC in the domain of real time video communication. Based on some observations in the experiments, we propose a novel fast mode decision algorithm of 44 block intra prediction for H.264/AVC in this paper. The proposed algorithm utilizes the following facts: (i) the horizontal prediction mode has higher possibility to be the best prediction mode than the other eight modes, (ii) The RD costs between the best prediction mode and its adjacent prediction mode have strong correlation, (iii) some 44 blocks' coefficients of DCT are all zeroes in some cases. Therefore, it can reduce the computational complexity of the H.264/A VC encoder remarkably. Experimental results show that the reduced time of our proposed algorithm is about 45% less than that of H.264/AVC, at the expense of 2%, or so bit-rate increasing. © 2008 IEEE.

关键词： Forecasting

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Stochastic gradient algorithm for multi-input systems based on the auxiliary model

Stochastic gradient algorithm for multi-input systems based ...

引用

International Conference on Computer Science and Software engineering, CSSE 2008

作者： Liao, Yuwu Wang, Xianfang Ding, Rui Feng Dept. of Physics and Electronics Information Technology Xiangfan University Xiangfan 441053 China Dept. of Information Engineering Henan Institute of Science and Technology Xinxiang 453003 China School of Communication and Control Engineering Jiangnan University Wuxi 214122 China

ISBN: (纸本)9780769533360

This paper presents an auxiliary model based stochastic gradient parameter estimation algorithm for multi-input output-error systems by minimizing a quadratic cost function. The basic idea is to replace the unknown variables in the information vector with the outputs of an auxiliary model or estimated outputs and the analysis and simulation results indicate that the parameter estimates converge to their true values for persistent excitation input signals. The algorithm proposed has significant computational advantage over existing least squares identification algorithms. A simulation example is given. © 2008 IEEE.

关键词： Stochastic systems

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Research on Ripple Algorithm in Automatic Target Recognition

Research on Ripple Algorithm in Automatic Target Recognition

引用

International Workshop on Intelligent Networks and Intelligent Systems (ICINIS)

作者： Jinhui Lan Tonghuan Huang Lili Wan Department of Measurement and Control Technologies School of Information Engineering University of Science and Technology Beijing Beijing China

Automatic target recognition (ATR) is increasingly important in a wide range of video and image applications, such as machine vision and security monitoring. In order to reduce the complexity and time lag in unmanned aircraft vehicle system (UAVS) for signals surveillance, force protection and strike, this paper proposes a novel ripple algorithm for ATR. This algorithm uses concentric circles to extract features of object and the features are quasi invariant to target translations, rotations and scaling. Through outdoor experimentation, it is proven that the ripple algorithm is correct and effective with high-speed in program running time. The recognition rate is more than 90% and the code runs on the order much faster than the implementation based on the traditional algorithms.

关键词： Target recognition Unmanned aerial vehicles Feature extraction Object recognition Gray-scale Intelligent networks Protection Color Image converters Intelligent systems

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Optimal real time DSP implementation of Extended Adaptive Multirate Wide Band (AMR-WB+) Speech Codec

Optimal real time DSP implementation of Extended Adaptive Mu...

引用

IEEE Region 10 International Conference TENCON

作者： Rachana Nagal Manish Kumar Rahul Jain Department of Electronics and Communication Engineering Amity School of Engineering and Technology New Delhi India Department of Instrumentation and Control Engineering Amity School of Engineering and Technology New Delhi India

Speech transmission are the most used form of communications in the personal communication systems and spectral efficiency is the very important aspect in wireless communication system and so low bit rate speech codecs play an important role in determining the systempsilas spectral efficiency. The AMR-WB+ (Extended Adaptive Multirate Wide Band) speech codec provides unique performance at very low bit rates from below 10 kbps to 24 kbps. The speech codec has high robustness to withstand high-bit error rates and performs well in tandeming conditions, hence leading to efficient bandwidth utilization and increased channel capacity. In this paper, several optimization techniques are presented for efficient implementation of AMR-WB+ on real time digital signal processor TMS320C6713, with an aim to overcome the limitation of computational burden and also scaling this application for enhanced speed to process more number of channels. The work presented here is the optimization of decoder part of AMR-WB+ speech codec and a step to minimize its MIPS (Millions Instruction per second), which includes debugging profiling and optimization with the help of code composer studio (CCS an IDE for TMS320C6713) and finally the implementation of the decoder on DSP Processor TMS320C6713. These techniques are in general implemented in any DSP processor platform.

关键词： Digital signal processing Wideband Speech codecs Bit rate Decoding Wireless communication Robustness Error analysis Bandwidth Channel capacity

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