Pub Date : 2007-07-11DOI: 10.1109/ICCCAS.2007.6250054
Xiao Yue, Xia Lei, Shaoqian Li
Multiple signal representation (MSR) is a promising distortionless technique to reduce the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, the drawback of MSR-OFDM system is the need of transmitting extra side information (SI) for informing the receiver the index of the transmitted signal, which may decrease the transmission efficiency. In this paper, a new blind detection technique is proposed for improving the transmission efficiency and the robustness of SI in MSR-OFDM system. The basic principle is to represent SI by PN sequences, then overlap the PN sequences on the data symbols for transmission. In the receiver, a blind detection algorithm is employed with moderate complexity. Simulation results show that the proposed new technique can efficiently improve the robustness of the SI by achieving large SNR gain but without loss of transmission efficiency.
{"title":"A novel blind detection technique for MSR-OFDM system","authors":"Xiao Yue, Xia Lei, Shaoqian Li","doi":"10.1109/ICCCAS.2007.6250054","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250054","url":null,"abstract":"Multiple signal representation (MSR) is a promising distortionless technique to reduce the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, the drawback of MSR-OFDM system is the need of transmitting extra side information (SI) for informing the receiver the index of the transmitted signal, which may decrease the transmission efficiency. In this paper, a new blind detection technique is proposed for improving the transmission efficiency and the robustness of SI in MSR-OFDM system. The basic principle is to represent SI by PN sequences, then overlap the PN sequences on the data symbols for transmission. In the receiver, a blind detection algorithm is employed with moderate complexity. Simulation results show that the proposed new technique can efficiently improve the robustness of the SI by achieving large SNR gain but without loss of transmission efficiency.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"157 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":"121731030","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.2007.4348131
Jiang Chaoshu, Chen Zhu-ming
Element-interpolation DPCA (Displaced Phase Center Antenna) employs a fractional delay filter to get good GMTI(Ground Moving Target Indication) performance while conventional DPCA conditions cannot be met. Its GMTI performance seriously depends on the adopted filter. This paper evaluates 4 fractional delay filters in element-interpolation DPCA, and provides guidelines for choosing an appropriate filter to get best GMTI performance (ICCCAS'07).
{"title":"Evaluation of Several FIR Fractional Delay Filters in Element-Interpolation DPCA","authors":"Jiang Chaoshu, Chen Zhu-ming","doi":"10.1109/ICCCAS.2007.4348131","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348131","url":null,"abstract":"Element-interpolation DPCA (Displaced Phase Center Antenna) employs a fractional delay filter to get good GMTI(Ground Moving Target Indication) performance while conventional DPCA conditions cannot be met. Its GMTI performance seriously depends on the adopted filter. This paper evaluates 4 fractional delay filters in element-interpolation DPCA, and provides guidelines for choosing an appropriate filter to get best GMTI performance (ICCCAS'07).","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"59 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":"133917453","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.2007.4348263
Xin Gao, Xingwen Liu, Shi-Quan Shao
In this paper, based on the stability theory, a nonlinear feedback control scheme is proposed to achieve projective synchronization of two coupled fractional order chaotic electronic oscillators. The advantage of this scheme is that the controller is designed analytically in detail, not only relying on the common numerical simulation. The numerical simulations are given to confirm the correctness and effectiveness of the control scheme and show that projective synchronization can exist in coupled fractional order chaotic electronic oscillators.
{"title":"Projective Synchronization in Coupled Fractional Order Chaotic Electronic Oscillators and its Control","authors":"Xin Gao, Xingwen Liu, Shi-Quan Shao","doi":"10.1109/ICCCAS.2007.4348263","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348263","url":null,"abstract":"In this paper, based on the stability theory, a nonlinear feedback control scheme is proposed to achieve projective synchronization of two coupled fractional order chaotic electronic oscillators. The advantage of this scheme is that the controller is designed analytically in detail, not only relying on the common numerical simulation. The numerical simulations are given to confirm the correctness and effectiveness of the control scheme and show that projective synchronization can exist in coupled fractional order chaotic electronic oscillators.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"13 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":"133947259","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.2007.4348212
Guohua Zhou, Jianping Xu, Mingzhi He, Zhongwen Zhou, Ni Chen
Digital peak voltage (DPV) control technique with single-edge and double-edge modulation methods is studied in this paper, and it is studied on buck converter. The different control laws for each modulation method are derived and compared. Small-signal analysis is further performed with comparison on the different modulation methods, and the corresponding Bode-graphs of ac small signal transfer functions are also given to show the difference among these different modulation methods.
{"title":"Analysis and Comparison on Digital Peak Voltage Control with Different Modulation Methods","authors":"Guohua Zhou, Jianping Xu, Mingzhi He, Zhongwen Zhou, Ni Chen","doi":"10.1109/ICCCAS.2007.4348212","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348212","url":null,"abstract":"Digital peak voltage (DPV) control technique with single-edge and double-edge modulation methods is studied in this paper, and it is studied on buck converter. The different control laws for each modulation method are derived and compared. Small-signal analysis is further performed with comparison on the different modulation methods, and the corresponding Bode-graphs of ac small signal transfer functions are also given to show the difference among these different modulation methods.","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":"131552905","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.2007.6251603
Yong Yang, Zhiguang Qin, H. Xiong, Yang Zhao, Tian Lan
We present a new e-voting scheme based on ring signature that satisfies three major properties: (1) "Everlasting anonymity" or unconditional voter-indistinguishability: even a computationally unbounded party does not gain any information about individual votes anytime, even after tally or in future. This is the first explicitly unconditional privacy discussion in e-voting schemes. (2)Uniform interface of ballots: it has no restriction on the form of ballots: "yes/no", k-out-of-m or adding their own candidates, all of which can be realized under uniform interface. (3)High-efficiency: the symmetric cryptography, which is fast and efficient, and the voting phase is only one-round. In addition, our scheme effectively prevents CTF cheating and overcomes the disadvantage in most existed solutions, which excessively dependent on the organization of voting. It not only protects benefits of voters, but also assures the fairness of voting, and can be suitable to all kinds' scales of electronic voting.
{"title":"A write-in electronic voting scheme based on ring signature","authors":"Yong Yang, Zhiguang Qin, H. Xiong, Yang Zhao, Tian Lan","doi":"10.1109/ICCCAS.2007.6251603","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6251603","url":null,"abstract":"We present a new e-voting scheme based on ring signature that satisfies three major properties: (1) \"Everlasting anonymity\" or unconditional voter-indistinguishability: even a computationally unbounded party does not gain any information about individual votes anytime, even after tally or in future. This is the first explicitly unconditional privacy discussion in e-voting schemes. (2)Uniform interface of ballots: it has no restriction on the form of ballots: \"yes/no\", k-out-of-m or adding their own candidates, all of which can be realized under uniform interface. (3)High-efficiency: the symmetric cryptography, which is fast and efficient, and the voting phase is only one-round. In addition, our scheme effectively prevents CTF cheating and overcomes the disadvantage in most existed solutions, which excessively dependent on the organization of voting. It not only protects benefits of voters, but also assures the fairness of voting, and can be suitable to all kinds' scales of electronic voting.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"74 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":"130783886","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.2007.4348242
Qishui Zhong, Yongbin Yu, Jingfu Bao, Songbai He
In this paper, we present an impulsive synchronization method for chaotic systems based on their Takagi-Sugeno (T-S) fuzzy models, using the comparison methods to determine the stability of error systems between the drive and response systems. Some sufficient conditions are derived to synchronize chaotic systems. A numerical example is given to illustrate the obtained results.
{"title":"Impulsive Synchronization for T-S Fuzzy Model-based Chaotic Systems","authors":"Qishui Zhong, Yongbin Yu, Jingfu Bao, Songbai He","doi":"10.1109/ICCCAS.2007.4348242","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.4348242","url":null,"abstract":"In this paper, we present an impulsive synchronization method for chaotic systems based on their Takagi-Sugeno (T-S) fuzzy models, using the comparison methods to determine the stability of error systems between the drive and response systems. Some sufficient conditions are derived to synchronize chaotic systems. A numerical example is given to illustrate the obtained results.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"18 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":"131257315","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.2007.6250055
Peng Cheng, Yue Xiao, L. Dan, Shaoqian Li
Selected mapping (SLM) technique is one of the promising peak-to-average power ratio (PAPR) reduction techniques for orthogonal frequency division multiplexing (OFDM). In SLM, the selection of phase sequence sets is an important factor for PAPR reduction. In this paper, a new criterion based on the correlationship between alternative signals is firstly proposed to examine the effects of different phase sequence sets in SLM scheme. According to the criteria, the chaotic phase sequence set is combined for optimizing the PAPR reduction performance. Simulation results show that the proposed technique could improve the PAPR reduction performance of SLM scheme more effectively compared with other phase sequence sets as introduced in the work of Bauml et al. (1996).
选择映射(SLM)技术是正交频分复用(OFDM)中最有前途的峰均功率比(PAPR)降低技术之一。在SLM中，相序集的选择是减小PAPR的一个重要因素。本文首次提出了一种基于备选信号间相关性的新判据，用于检测SLM方案中不同相序集的影响。根据该准则，结合混沌相序集对PAPR降噪性能进行优化。仿真结果表明，与Bauml et al.(1996)的工作中引入的其他相序集相比，所提出的技术可以更有效地提高SLM方案的PAPR消减性能。
{"title":"Optimized phase sequence set for SLM-OFDM","authors":"Peng Cheng, Yue Xiao, L. Dan, Shaoqian Li","doi":"10.1109/ICCCAS.2007.6250055","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250055","url":null,"abstract":"Selected mapping (SLM) technique is one of the promising peak-to-average power ratio (PAPR) reduction techniques for orthogonal frequency division multiplexing (OFDM). In SLM, the selection of phase sequence sets is an important factor for PAPR reduction. In this paper, a new criterion based on the correlationship between alternative signals is firstly proposed to examine the effects of different phase sequence sets in SLM scheme. According to the criteria, the chaotic phase sequence set is combined for optimizing the PAPR reduction performance. Simulation results show that the proposed technique could improve the PAPR reduction performance of SLM scheme more effectively compared with other phase sequence sets as introduced in the work of Bauml et al. (1996).","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"41 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":"132269628","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.2007.6250081
Hai Huang, Fei Lin, Changchuan Yin, Guangxin Yue
Accurate estimation of synchronization parameters is a fundamental issue in all digital communication systems, especially in the orthogonal frequency-division multiplexing (OFDM) systems. In this paper, we investigate a novel approach to estimation and tracking the symbol timing offset in unknown multi-paths fading channel based on the application of method called sequential Monte Carlo. The performance of the proposed technique is studied through computer simulations that illustrate the accuracy of timing recovery and particle filtering receiver outperforms extended Kalman filtering (EKF) for the considered SNR.
{"title":"A tracking algorithm for OFDM timing synchronization using particle filtering","authors":"Hai Huang, Fei Lin, Changchuan Yin, Guangxin Yue","doi":"10.1109/ICCCAS.2007.6250081","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6250081","url":null,"abstract":"Accurate estimation of synchronization parameters is a fundamental issue in all digital communication systems, especially in the orthogonal frequency-division multiplexing (OFDM) systems. In this paper, we investigate a novel approach to estimation and tracking the symbol timing offset in unknown multi-paths fading channel based on the application of method called sequential Monte Carlo. The performance of the proposed technique is studied through computer simulations that illustrate the accuracy of timing recovery and particle filtering receiver outperforms extended Kalman filtering (EKF) for the considered SNR.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"19 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":"134647651","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.2007.6247529
Minhan Zheng, Lin Wang, Yuliang Tang
In this paper shaping gains of regular (3,6) LDPC Coded-QAM transmitting systems with nonuniform QAM constellation are presented over AWGN channel. The influences of code rate, frame length, the order of non-uniform QAM constellation, and the finite fields GF(q) of LDPC codes on shaping gain are investigated. It is found that shaping gain of proposed system with non-uniform 64 QAM constellation for binary LDPC codes (R=l/2) can be obviously achieved by middle frame length, and can be improved further with the increase of frame length. Meanwhile it is found that under non-uniform 16 QAM constellation for binary LDPC code(R=l/2) there is no shaping gain improvement with the increase of frame length, but the shaping gains of nonuniform 16 QAM and 64 QAM both are increased, even the former is no less than the latter when we change the finite fields GF(q) of LDPC codes from 2 to 16. The shaping gain can disappear as the binary code rate increases to 3/4 in proposed system.
{"title":"Shaping gain of LDPC coded-QAM transmitting systems with non-uniform constellation","authors":"Minhan Zheng, Lin Wang, Yuliang Tang","doi":"10.1109/ICCCAS.2007.6247529","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6247529","url":null,"abstract":"In this paper shaping gains of regular (3,6) LDPC Coded-QAM transmitting systems with nonuniform QAM constellation are presented over AWGN channel. The influences of code rate, frame length, the order of non-uniform QAM constellation, and the finite fields GF(q) of LDPC codes on shaping gain are investigated. It is found that shaping gain of proposed system with non-uniform 64 QAM constellation for binary LDPC codes (R=l/2) can be obviously achieved by middle frame length, and can be improved further with the increase of frame length. Meanwhile it is found that under non-uniform 16 QAM constellation for binary LDPC code(R=l/2) there is no shaping gain improvement with the increase of frame length, but the shaping gains of nonuniform 16 QAM and 64 QAM both are increased, even the former is no less than the latter when we change the finite fields GF(q) of LDPC codes from 2 to 16. The shaping gain can disappear as the binary code rate increases to 3/4 in proposed system.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"232 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":"115453255","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.2007.6251612
Jin Jing, Qin Zhiguang, Ye-xiong Li
With the continuous increase of multicast nodes and the introduction of IPv6 technology, CERNET2 ultra-large-scale multicast applications and security will be facing greater challenges. Therefore, a new security framework for dynamic multicast, in which multicast key management domain is divided into the trunk and leaves domains, is presented to avoid the overall system cost about re-keying because of the frequent changes of the members in the group.
{"title":"CERNET2 super-scale dynamic multicast network-based security system framework principles","authors":"Jin Jing, Qin Zhiguang, Ye-xiong Li","doi":"10.1109/ICCCAS.2007.6251612","DOIUrl":"https://doi.org/10.1109/ICCCAS.2007.6251612","url":null,"abstract":"With the continuous increase of multicast nodes and the introduction of IPv6 technology, CERNET2 ultra-large-scale multicast applications and security will be facing greater challenges. Therefore, a new security framework for dynamic multicast, in which multicast key management domain is divided into the trunk and leaves domains, is presented to avoid the overall system cost about re-keying because of the frequent changes of the members in the group.","PeriodicalId":218351,"journal":{"name":"2007 International Conference on Communications, Circuits and Systems","volume":"19 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":"114445663","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}
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