Pub Date : 2008-12-16DOI: 10.1109/ICCT.2008.4716167
K. Kim, Young-Gon Kim, In-Bok Kim, Young-Ki Cho
A recently developed ultra-wideband (UWB) balun opens new possibilities for the low-cost, mass-producible, and surface mountable UWB components with 10psilas of GHz bandwidth. The balun is a simple microstrip-to-coplanar stripline transition structure, but a single balun can be designed to have operating frequency range from DC to over 40 GHz. The balun design is based on optimal impedance matching and smooth field transformations between adjacent transmission lines. Utilizing this uniplanar balun, new low-cost and mass-producible components-e.g., mixers, doublers, antennas, detectors, differential amplifiers, etc.-with 10psilas of GHz bandwidth are being developed. The new UWB components can also be designed in the form of low-cost surface-mountable chips, which may open new commercial UWB application areas. In this presentation, the design of the ultra-wideband balun will be described, and recent developments of new UWB components utilizing the balun will also be introduced.
{"title":"Keynote address VI A new ultra-wideband balun and its associated components","authors":"K. Kim, Young-Gon Kim, In-Bok Kim, Young-Ki Cho","doi":"10.1109/ICCT.2008.4716167","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716167","url":null,"abstract":"A recently developed ultra-wideband (UWB) balun opens new possibilities for the low-cost, mass-producible, and surface mountable UWB components with 10psilas of GHz bandwidth. The balun is a simple microstrip-to-coplanar stripline transition structure, but a single balun can be designed to have operating frequency range from DC to over 40 GHz. The balun design is based on optimal impedance matching and smooth field transformations between adjacent transmission lines. Utilizing this uniplanar balun, new low-cost and mass-producible components-e.g., mixers, doublers, antennas, detectors, differential amplifiers, etc.-with 10psilas of GHz bandwidth are being developed. The new UWB components can also be designed in the form of low-cost surface-mountable chips, which may open new commercial UWB application areas. In this presentation, the design of the ultra-wideband balun will be described, and recent developments of new UWB components utilizing the balun will also be introduced.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121688027","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716094
Aibing Qiu, Chenglin Wen, B. Jiang
An observer-based fault detection direct design method for multirate sampled-data systems (MSD) is investigated in this paper. Firstly, by use of the discrete lifting technique, the MSD fault detection problem is transformed into an equivalent slow rate pure discrete time problem based on the Hinfin optimal direct design method of single rate sampled-data systems. An Hinfin performance index is then optimized to make the obtained residuals sensitive to the faults and robust to the unknown inputs. An extend QR decomposition algorithm is put forward to ensure the residual generator satisfying the causality constraints. Finally the residual is inverse lifted to implement fast rate fault detection. Simulation results of a numerical example are provided to illustrate the efficiency of the proposed approach.
{"title":"A new fast rate fault detection approach for multirate sampled-data systems","authors":"Aibing Qiu, Chenglin Wen, B. Jiang","doi":"10.1109/ICCT.2008.4716094","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716094","url":null,"abstract":"An observer-based fault detection direct design method for multirate sampled-data systems (MSD) is investigated in this paper. Firstly, by use of the discrete lifting technique, the MSD fault detection problem is transformed into an equivalent slow rate pure discrete time problem based on the Hinfin optimal direct design method of single rate sampled-data systems. An Hinfin performance index is then optimized to make the obtained residuals sensitive to the faults and robust to the unknown inputs. An extend QR decomposition algorithm is put forward to ensure the residual generator satisfying the causality constraints. Finally the residual is inverse lifted to implement fast rate fault detection. Simulation results of a numerical example are provided to illustrate the efficiency of the proposed approach.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122590247","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716254
Y. Yokota, A. Mase, Y. Kogi, T. Tokuzawa, K. Kawahata, Y. Nagayama, H. Hojo
Reflectometry is widely used to measure plasma density profiles and density fluctuations in magnetically confined plasmas. When the electromagnetic wave is launched into the plasma, the wave is reflected at the corresponding cutoff layer. Higher frequency wave reflects at the higher density layer. Therefore wide frequency band system is needed to obtain whole density profile. Ultrashort-pulse as a source is one of the candidates to achieve this, which is called ultrashort-pulse reflectometry (USPR). An USPR has been applied to large helical device (LHD) at National Institute for Fusion Science (NIFS). The system can be controlled from remote site via Internet called Super-SINET. This paper describes the USPR system and the reconstruction method of density profiles.
{"title":"Ultra-wide band radar reflectometer for measurment of plasma density profiles","authors":"Y. Yokota, A. Mase, Y. Kogi, T. Tokuzawa, K. Kawahata, Y. Nagayama, H. Hojo","doi":"10.1109/ICCT.2008.4716254","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716254","url":null,"abstract":"Reflectometry is widely used to measure plasma density profiles and density fluctuations in magnetically confined plasmas. When the electromagnetic wave is launched into the plasma, the wave is reflected at the corresponding cutoff layer. Higher frequency wave reflects at the higher density layer. Therefore wide frequency band system is needed to obtain whole density profile. Ultrashort-pulse as a source is one of the candidates to achieve this, which is called ultrashort-pulse reflectometry (USPR). An USPR has been applied to large helical device (LHD) at National Institute for Fusion Science (NIFS). The system can be controlled from remote site via Internet called Super-SINET. This paper describes the USPR system and the reconstruction method of density profiles.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122662936","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716097
Zhao Zhijin, Wang Bai-chuan
In real uplink multicarrier CDMA (MC CDMA) communication system, the asynchrony of active userspsila signature is a key factor of multiple access interference(MAI). Considering users access randomly, not only the location of active users, but also their number varies with time. In typical analysis, multi-user detection theory for MC CDMA has been developed under the assumption that the number of active users is constant and known at the receiver, and coincides with the maximum number of users entitled to access the system. Since many users might be inactive at any given time, detection under the assumption of the number of users larger than the real one may impair performance. The main goal of this paper is to introduce a general approach to the problem of identifying active users and estimating their data in a MC CDMA random-access system where users are continuously and independently entering and leaving the system. The tool we advocate is random-set theory (RST) and we propose a new particle swarm optimization (PSO) algorithm for discrete multi-values with the similar properties of BPSO to reduce the computation, the simulation result prove the efficiency of the new algorithm.
{"title":"MC CDMA multiuser detection using random set theory and multi-value particle swarm optimization algorithm","authors":"Zhao Zhijin, Wang Bai-chuan","doi":"10.1109/ICCT.2008.4716097","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716097","url":null,"abstract":"In real uplink multicarrier CDMA (MC CDMA) communication system, the asynchrony of active userspsila signature is a key factor of multiple access interference(MAI). Considering users access randomly, not only the location of active users, but also their number varies with time. In typical analysis, multi-user detection theory for MC CDMA has been developed under the assumption that the number of active users is constant and known at the receiver, and coincides with the maximum number of users entitled to access the system. Since many users might be inactive at any given time, detection under the assumption of the number of users larger than the real one may impair performance. The main goal of this paper is to introduce a general approach to the problem of identifying active users and estimating their data in a MC CDMA random-access system where users are continuously and independently entering and leaving the system. The tool we advocate is random-set theory (RST) and we propose a new particle swarm optimization (PSO) algorithm for discrete multi-values with the similar properties of BPSO to reduce the computation, the simulation result prove the efficiency of the new algorithm.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125065061","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716289
Zhao Zhijin, Yao Yao, Pu Junjie
In mobile multiple-access communications, not only the location of active users, but also their number varies with time. In typical analysis, multiuser detection theory has been developed under the assumption that the number of active users is constant and known at the receiver, and coincides with the maximum number of users entitled to access the system. This assumption is often overly pessimistic, since many users might be inactive at any given time, and detection under the assumption of the number of users larger than the real one may impair performance. The main goal of this paper is to introduce a general approach to the problem of identifying active users and estimating their parameters and data in a random-access system where users are continuously entering and leaving the system. The tool we advocate is the combination of random-set theory (RST) and multi-valued particle swarm optimization (PSO) algorithm: applying this, we derive receivers in an environment where the set of transmitters comprises an unknown number of elements. In this paper we restrict ourselves to active user identification and data detection.
{"title":"Multiuser detection based on random-set theory and multi-valued particle swarm optimization","authors":"Zhao Zhijin, Yao Yao, Pu Junjie","doi":"10.1109/ICCT.2008.4716289","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716289","url":null,"abstract":"In mobile multiple-access communications, not only the location of active users, but also their number varies with time. In typical analysis, multiuser detection theory has been developed under the assumption that the number of active users is constant and known at the receiver, and coincides with the maximum number of users entitled to access the system. This assumption is often overly pessimistic, since many users might be inactive at any given time, and detection under the assumption of the number of users larger than the real one may impair performance. The main goal of this paper is to introduce a general approach to the problem of identifying active users and estimating their parameters and data in a random-access system where users are continuously entering and leaving the system. The tool we advocate is the combination of random-set theory (RST) and multi-valued particle swarm optimization (PSO) algorithm: applying this, we derive receivers in an environment where the set of transmitters comprises an unknown number of elements. In this paper we restrict ourselves to active user identification and data detection.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125681996","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716111
Xiaowei Wang, Xin Li, M. Fei
In this paper the performance improvement of wireless networks caused by chirp spread spectrum (CSS) as PHY is addressed. Firstly, the bit error rate function is firstly derived theoretically. Then an OPNET modulation curve is created through EMA (external model access) programming using the BER result. By doing this, CSS is introduced into OPNET as an alternate modulation method. Furthermore, simulations are designed and carried out in OPNET, taking advantage of the new modulation curve. Simulation results show that networks using CSS have lower delay owing to the feature of CSS. This advantage becomes more evident when traffic increases under real-time circumstances.
{"title":"Performance evaluation of wireless networks based on chirp spread spectrum","authors":"Xiaowei Wang, Xin Li, M. Fei","doi":"10.1109/ICCT.2008.4716111","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716111","url":null,"abstract":"In this paper the performance improvement of wireless networks caused by chirp spread spectrum (CSS) as PHY is addressed. Firstly, the bit error rate function is firstly derived theoretically. Then an OPNET modulation curve is created through EMA (external model access) programming using the BER result. By doing this, CSS is introduced into OPNET as an alternate modulation method. Furthermore, simulations are designed and carried out in OPNET, taking advantage of the new modulation curve. Simulation results show that networks using CSS have lower delay owing to the feature of CSS. This advantage becomes more evident when traffic increases under real-time circumstances.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130503495","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716115
Zhang Hui, Dong Yu-ning, Yang Long-xiang, Zhu Hong-bo
According to the heterogeneous characteristics of wireless mesh networks and the QoS requirements of multimedia applications, we design a novel QoS adaptive architecture for WMNs that is cross-domain, cross-layer and cross-node. Furthermore, this architecture is mathematically described by using a bi-level programming model. This model uses the optimization results of subnets as the optimization parameters or optimization constraints of backbone networks, and combines the features of different network domains. Based on this bi-level programming model, we propose an ant colony optimization based routing algorithm. Simulation results show that the bi-level programming model, which fully optimizes various QoS parameters of paths, can effectively adapt to the heterogeneous characteristics of WMNs so as to obtain the optimal path; the proposed routing algorithm, which has both advantages of low complexity and fast convergence speed, can converge to the theoretical optimal solution of bi-level programming model.
{"title":"A novel ant colony based cross-layer QoS routing algorithm for wireless mesh networks","authors":"Zhang Hui, Dong Yu-ning, Yang Long-xiang, Zhu Hong-bo","doi":"10.1109/ICCT.2008.4716115","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716115","url":null,"abstract":"According to the heterogeneous characteristics of wireless mesh networks and the QoS requirements of multimedia applications, we design a novel QoS adaptive architecture for WMNs that is cross-domain, cross-layer and cross-node. Furthermore, this architecture is mathematically described by using a bi-level programming model. This model uses the optimization results of subnets as the optimization parameters or optimization constraints of backbone networks, and combines the features of different network domains. Based on this bi-level programming model, we propose an ant colony optimization based routing algorithm. Simulation results show that the bi-level programming model, which fully optimizes various QoS parameters of paths, can effectively adapt to the heterogeneous characteristics of WMNs so as to obtain the optimal path; the proposed routing algorithm, which has both advantages of low complexity and fast convergence speed, can converge to the theoretical optimal solution of bi-level programming model.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133869428","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716084
F. Zhou, Tianhao Tang, Chenglin Wen
To diagnose multiple faults of multivariate system, DCA (designated component analysis) is introduced to avoid the pattern compounding problem of PCA (principal component analysis). In this paper and a DCA based multi-level small fault diagnosis method is developed for multiple faults diagnosis when small faults are involved in the system. Simulation for observation data involved 4 faults shows its efficiency.
{"title":"DCA based multi-level small fault diagnosis","authors":"F. Zhou, Tianhao Tang, Chenglin Wen","doi":"10.1109/ICCT.2008.4716084","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716084","url":null,"abstract":"To diagnose multiple faults of multivariate system, DCA (designated component analysis) is introduced to avoid the pattern compounding problem of PCA (principal component analysis). In this paper and a DCA based multi-level small fault diagnosis method is developed for multiple faults diagnosis when small faults are involved in the system. Simulation for observation data involved 4 faults shows its efficiency.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132876180","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716086
Jianzheng Zuo, Guangyi Wang, Xulei Bao
This paper introduces a method to solve the fractional calculus problem and proposes a new fractional chaotic system for generating complex carrier wave signals of chaos-based communications. Numerical simulations show that the lowest order we found for chaos to exist in the system is 2.31. Based on the system, a fractional chaotic signal generator is designed using virtual instrument technology and the experimental results are observed.
{"title":"Design and implementation of a fractional chaos generator based on virtual instrument technology","authors":"Jianzheng Zuo, Guangyi Wang, Xulei Bao","doi":"10.1109/ICCT.2008.4716086","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716086","url":null,"abstract":"This paper introduces a method to solve the fractional calculus problem and proposes a new fractional chaotic system for generating complex carrier wave signals of chaos-based communications. Numerical simulations show that the lowest order we found for chaos to exist in the system is 2.31. Based on the system, a fractional chaotic signal generator is designed using virtual instrument technology and the experimental results are observed.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131006450","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 : 2008-12-16DOI: 10.1109/ICCT.2008.4716262
Wenjin Wu, Pengjun Wang, Xiao-ying Zhang, Lingli Wang
Based on the investigation of the fixed polarity Reed Muller (FPRM) expression, the propagation algorithm of signal probability, decomposition algorithm of multi-input AND/XOR gate of RM circuits and quantum genetic algorithm (QGA), this paper proposes a new algorithm based on QGA to search for the best polarity of RM circuits in terms of the power and area. Experimental results of eight large circuits from MCNC benchmark show that the best polarity obtained by the proposed algorithm can achieve average power and area savings by 86.2% and 66.8% respectively, compared with polarity 0.
{"title":"Notice of RetractionSearch for the best polarity of fixed polarity Reed Muller expression base on QGA","authors":"Wenjin Wu, Pengjun Wang, Xiao-ying Zhang, Lingli Wang","doi":"10.1109/ICCT.2008.4716262","DOIUrl":"https://doi.org/10.1109/ICCT.2008.4716262","url":null,"abstract":"Based on the investigation of the fixed polarity Reed Muller (FPRM) expression, the propagation algorithm of signal probability, decomposition algorithm of multi-input AND/XOR gate of RM circuits and quantum genetic algorithm (QGA), this paper proposes a new algorithm based on QGA to search for the best polarity of RM circuits in terms of the power and area. Experimental results of eight large circuits from MCNC benchmark show that the best polarity obtained by the proposed algorithm can achieve average power and area savings by 86.2% and 66.8% respectively, compared with polarity 0.","PeriodicalId":259577,"journal":{"name":"2008 11th IEEE International Conference on Communication Technology","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134125399","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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