Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348165
Chen Jian, Yang Ming, J. Jiang
In this paper, a new DCT block-edge-pattern and high efficient method for compressed image retrieval is proposed. This method directly extracts three edge patterns from compressed image to construct 3D and 4D histogram. Then uses them and the run-length histogram as the feature -based indexing keys to retrieve images. The results of our two-stage experiments show that the superior performances of our method than other exiting method in retrieval precision, processing speed and robust to noise and color change.
{"title":"A New Block-edge-pattern and High Efficient Image Retrieval Method in DCT Domain","authors":"Chen Jian, Yang Ming, J. Jiang","doi":"10.1109/ICCCAS.2007.4348165","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348165","url":null,"abstract":"In this paper, a new DCT block-edge-pattern and high efficient method for compressed image retrieval is proposed. This method directly extracts three edge patterns from compressed image to construct 3D and 4D histogram. Then uses them and the run-length histogram as the feature -based indexing keys to retrieve images. The results of our two-stage experiments show that the superior performances of our method than other exiting method in retrieval precision, processing speed and robust to noise and color change.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131149880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250064
Hailin Xiao, Z. Nie
Adopt space time spreading, superimposed training sequences and space-time coding to obtain a closed-form of average error probability upper bound and maximum likelihood estimation expression for multiple input and multiple output (MIMO) correlated frequency-selective channel in the presence of interference(co-channel interference and jamming signals). Moreover, the correlation at both ends of the wireless link can be incorporated equivalently into correlation at the transmit end is derived. The simulation results are presented to validate the proposed analysis.
{"title":"Analysis for MIMO correlated frequency-selective channel in the presence of interference","authors":"Hailin Xiao, Z. Nie","doi":"10.1109/ICCCAS.2007.6250064","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250064","url":null,"abstract":"Adopt space time spreading, superimposed training sequences and space-time coding to obtain a closed-form of average error probability upper bound and maximum likelihood estimation expression for multiple input and multiple output (MIMO) correlated frequency-selective channel in the presence of interference(co-channel interference and jamming signals). Moreover, the correlation at both ends of the wireless link can be incorporated equivalently into correlation at the transmit end is derived. The simulation results are presented to validate the proposed analysis.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132743842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6251605
Fengli Zhang, Ji Geng, Zhiguang Qin, Mingtian Zhou
This paper analyzes the principles of SYN proxy, proposes the two upgrade algorithms of SYN proxy, and gives the ideas for combining the hop-count information filter to defense DDoS, introduces the detecting method of DDoS attacks based on SYN proxy integrated the hop count filter. The test result expresses that this method may detect and defense DDos attack in heavy traffic.
{"title":"Detecting the DDoS attacks based on SYN proxy and Hop-Count Filter","authors":"Fengli Zhang, Ji Geng, Zhiguang Qin, Mingtian Zhou","doi":"10.1109/ICCCAS.2007.6251605","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6251605","url":null,"abstract":"This paper analyzes the principles of SYN proxy, proposes the two upgrade algorithms of SYN proxy, and gives the ideas for combining the hop-count information filter to defense DDoS, introduces the detecting method of DDoS attacks based on SYN proxy integrated the hop count filter. The test result expresses that this method may detect and defense DDos attack in heavy traffic.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132802807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250846
J.Y. Huang, Z.X. Chen, Q. Wan, W.L. Yang
Estimation of mobile station location is made difficult by nonsymmetric contamination of measured data caused by NLOS propagation effects. In this paper, a novel algorithm based on kriging method is proposed to reduce the effects of NLOS propagation on the location error. Simulation results show that the proposed algorithm clearly outperforms two other algorithms (non-parametric kernel method and parametric least square method) and comes close to meeting Cramer Rao lower bound (CRLB).
{"title":"Kriging estimator for mobile station positioning under non-line-of-sight (NLOS) conditions","authors":"J.Y. Huang, Z.X. Chen, Q. Wan, W.L. Yang","doi":"10.1109/ICCCAS.2007.6250846","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250846","url":null,"abstract":"Estimation of mobile station location is made difficult by nonsymmetric contamination of measured data caused by NLOS propagation effects. In this paper, a novel algorithm based on kriging method is proposed to reduce the effects of NLOS propagation on the location error. Simulation results show that the proposed algorithm clearly outperforms two other algorithms (non-parametric kernel method and parametric least square method) and comes close to meeting Cramer Rao lower bound (CRLB).","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128456453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348260
Jianwu Zhao, Yibing Shi
Error detection and correction is critical to accurate data transmission, storage and retrieval. Error correction coding (ECC) has been a crucial part of data transmission or storage. In high-reliability applications, the single error correction and double error detections (SEC-DED) Hamming code may not provide adequate protection against burst errors. This makes multiple-error correction (MEC) highly desirable. This paper proposed a novel approach to improving burst errors correction capability of the extended Hamming Code, with the target objective of minimizing the redundancy, while retaining code rate as maximum as possible. Design algorithms of Hamming encoding and decoding are proposed in this paper, and the simplicity and ease of their implementations are demonstrated with example.
{"title":"A Novel Approach to Improving Burst Errors Correction Capability of Hamming Code","authors":"Jianwu Zhao, Yibing Shi","doi":"10.1109/ICCCAS.2007.4348260","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348260","url":null,"abstract":"Error detection and correction is critical to accurate data transmission, storage and retrieval. Error correction coding (ECC) has been a crucial part of data transmission or storage. In high-reliability applications, the single error correction and double error detections (SEC-DED) Hamming code may not provide adequate protection against burst errors. This makes multiple-error correction (MEC) highly desirable. This paper proposed a novel approach to improving burst errors correction capability of the extended Hamming Code, with the target objective of minimizing the redundancy, while retaining code rate as maximum as possible. Design algorithms of Hamming encoding and decoding are proposed in this paper, and the simplicity and ease of their implementations are demonstrated with example.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132199835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348244
Minghua Zhao, Dakui Wu, Yong Fan, J. Zhan, Yonghong Zhang
An investigation of 94.5 GHz avalanche diode high order frequency multiplier is presented. The nonlinearity property of avalanche phenomenon has evoked great interest in high order frequency multiplication. Theoretical analysis of harmonic characters of avalanche current is outlined. In experiment 4.1 mW output power and 0.8% efficiency are obtained. Meanwhile the phase noise of 84 dBc/Hz at 10 KHz offset is measured.
{"title":"A New 94.5GHz Avalanche Diode High Order Frequency Multiplier","authors":"Minghua Zhao, Dakui Wu, Yong Fan, J. Zhan, Yonghong Zhang","doi":"10.1109/ICCCAS.2007.4348244","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348244","url":null,"abstract":"An investigation of 94.5 GHz avalanche diode high order frequency multiplier is presented. The nonlinearity property of avalanche phenomenon has evoked great interest in high order frequency multiplication. Theoretical analysis of harmonic characters of avalanche current is outlined. In experiment 4.1 mW output power and 0.8% efficiency are obtained. Meanwhile the phase noise of 84 dBc/Hz at 10 KHz offset is measured.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133246475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348196
Jian Fu, Zhonghua Li, Hongzhou Tan
The artificial immune system is a new approach inspired from abundant mechanisms of biological immune system. It includes such basic operations as clone, mutation, and selection, even crossover. It is widely applied to function optimization, abnormal detection, pattern recognition, computer security, machine learning, control engineering, etc. However, the evolutionary process of the current artificial immune system depends on only two factors. One is the fitness between antibody and antigen, and the other is the concentration of antibody population. As a global searching method, particle swarm optimization includes an important social learning mechanism that enables it to fast approximate the global optimum. This paper proposed a hybrid artificial immune network for optimization with swarm learning and elite-keeping. Simulation results indicated this hybrid method has lower time complexity and fast convergence, and is an effective optimization tool.
{"title":"A Hybrid Artificial Immune Network with Swarm Learning","authors":"Jian Fu, Zhonghua Li, Hongzhou Tan","doi":"10.1109/ICCCAS.2007.4348196","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348196","url":null,"abstract":"The artificial immune system is a new approach inspired from abundant mechanisms of biological immune system. It includes such basic operations as clone, mutation, and selection, even crossover. It is widely applied to function optimization, abnormal detection, pattern recognition, computer security, machine learning, control engineering, etc. However, the evolutionary process of the current artificial immune system depends on only two factors. One is the fitness between antibody and antigen, and the other is the concentration of antibody population. As a global searching method, particle swarm optimization includes an important social learning mechanism that enables it to fast approximate the global optimum. This paper proposed a hybrid artificial immune network for optimization with swarm learning and elite-keeping. Simulation results indicated this hybrid method has lower time complexity and fast convergence, and is an effective optimization tool.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"126 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133321323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348178
Hejin, H. Songbai
In this paper I bring forward a way to design numeric control oscillator (NCO)that can be used in amplitude modulation, frequency modulation, phase modulation and digital up converter(DUC). Emphatically, this paper analyses characteristics of frequency control word (FCW) and propose solution of different application.Finally a FPGA implementation is presented.
{"title":"Design and Realization of NCO of Modulation Based on FPGA","authors":"Hejin, H. Songbai","doi":"10.1109/ICCCAS.2007.4348178","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348178","url":null,"abstract":"In this paper I bring forward a way to design numeric control oscillator (NCO)that can be used in amplitude modulation, frequency modulation, phase modulation and digital up converter(DUC). Emphatically, this paper analyses characteristics of frequency control word (FCW) and propose solution of different application.Finally a FPGA implementation is presented.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123000668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348170
Yang Cheng, Zhu Da-yong, Zhang Jin, Huang Bin
In this paper, we designed a photoelectric guidance system for helicopter landing and recovery. Two infrared CCD cameras were used to image the four beacons lighted by semiconductor lasers on both sides of the helicopter. The beacon position and attitude were extracted by image process and target identification. Using the dual camera photogrammetry(DCP) model established, the real-time helicopter coordinates were calculated relative to the landing point. Using the high performance DSP system, two channel of image signal were collected, detected and tracked in real time and the experimental results were displayed. The hardware-in-the-loop experiment shows that the measurement accuracy of distance can reach plusmn5 cm and the measurement accuracy of angle can reach plusmn3degin the guidance system. The errors meet the accuracy requirements of safe landing for helicopters.
{"title":"Study on the Dual Camera Photogrammetry and Signal Process in Photoelectric Landing Guidance System","authors":"Yang Cheng, Zhu Da-yong, Zhang Jin, Huang Bin","doi":"10.1109/ICCCAS.2007.4348170","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348170","url":null,"abstract":"In this paper, we designed a photoelectric guidance system for helicopter landing and recovery. Two infrared CCD cameras were used to image the four beacons lighted by semiconductor lasers on both sides of the helicopter. The beacon position and attitude were extracted by image process and target identification. Using the dual camera photogrammetry(DCP) model established, the real-time helicopter coordinates were calculated relative to the landing point. Using the high performance DSP system, two channel of image signal were collected, detected and tracked in real time and the experimental results were displayed. The hardware-in-the-loop experiment shows that the measurement accuracy of distance can reach plusmn5 cm and the measurement accuracy of angle can reach plusmn3degin the guidance system. The errors meet the accuracy requirements of safe landing for helicopters.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123052189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.4348290
Xingwen Liu
Based on their Takagi-Sugeno (T-S) fuzzy model, a new impulsive control method to control smooth nonlinear systems is proposed. The author gives a strict mathematical foundation containing some assumptions on which a nonlinear systems can be expressed as T-S fuzzy model and the followed analysis can proceed, and then proposes some methods and procedure for designing impulsive control laws, which can stabilize the original nonlinear system.
{"title":"T-S Fuzzy-Model-Based Impulsive Control of Autonomous Nonlinear Systems","authors":"Xingwen Liu","doi":"10.1109/ICCCAS.2007.4348290","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348290","url":null,"abstract":"Based on their Takagi-Sugeno (T-S) fuzzy model, a new impulsive control method to control smooth nonlinear systems is proposed. The author gives a strict mathematical foundation containing some assumptions on which a nonlinear systems can be expressed as T-S fuzzy model and the followed analysis can proceed, and then proposes some methods and procedure for designing impulsive control laws, which can stabilize the original nonlinear system.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124024916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：