N. T. Hung, H. Ikeda, K. Kenzi, N. Vogiatzis, Zin Lin
This paper presents a car navigation system for a future integrated transportation system as an intelligent transportation system-ITS. The system focuses on the mechanisms how to detect the current position of each vehicle and to navigate each vehicle. The individual vehicular data is collected using Global Positioning System-GPS for location data and then transmitted to the control center by the mobile phone. For the purpose of this paper, the device will be referred to "Reporting Equipment for current geographic Position" or REP. In the case where every vehicle within the transportation network is equipped with a REP it will be referred to as "Comprehensive REP Environment" or CREPE. If a great number of cars report their positions to the control center, it causes a heavy load of network. This paper proposes an algorithm to reduce the network load. If a car skips some reports, the control center cannot estimate its correct position. The algorithm aims to decrease the frequency of the reporting without sacrificing the proper level of accuracy for the position. The effectiveness is evaluated as 1/2 or 2/3 times compared to periodical reporting algorithms.
{"title":"An optimum algorithm for reporting of automobile position","authors":"N. T. Hung, H. Ikeda, K. Kenzi, N. Vogiatzis, Zin Lin","doi":"10.1109/CCE.2006.350886","DOIUrl":"https://doi.org/10.1109/CCE.2006.350886","url":null,"abstract":"This paper presents a car navigation system for a future integrated transportation system as an intelligent transportation system-ITS. The system focuses on the mechanisms how to detect the current position of each vehicle and to navigate each vehicle. The individual vehicular data is collected using Global Positioning System-GPS for location data and then transmitted to the control center by the mobile phone. For the purpose of this paper, the device will be referred to \"Reporting Equipment for current geographic Position\" or REP. In the case where every vehicle within the transportation network is equipped with a REP it will be referred to as \"Comprehensive REP Environment\" or CREPE. If a great number of cars report their positions to the control center, it causes a heavy load of network. This paper proposes an algorithm to reduce the network load. If a car skips some reports, the control center cannot estimate its correct position. The algorithm aims to decrease the frequency of the reporting without sacrificing the proper level of accuracy for the position. The effectiveness is evaluated as 1/2 or 2/3 times compared to periodical reporting algorithms.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128852254","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}
Carbon nanotube (CNT) integrated with biological functionalities is expected to be one of the most promising field in future biomedical applications. CNT material with prominent properties along with application of micro fabrication technology make possible enormous application potential sensors with high resolution, more accurate, higher sensitivity and micrometer size. One of these applications, introduced in this paper, is pH sensors using CNT as sensing material. Monitoring and evaluating the pH of the solution in a bioprocess is one of the key steps in the success of bioreactor operation. Our proposal based on the changes significantly in electrical property of CNT under different pH environment. This paper describes a method for designing a simple and fast response pH sensor employing single wall carbon nanotube (SWCNT) using a spray. The conductance and the typical amperometric response of SWCNT at room temperature at different hydroxyl ion concentrations were successfully demonstrated.
{"title":"pH Sensor Using Carbon Nanotubes as Sensing Material","authors":"T. Tran, J. Kwon, Kyongsoo Lee, Jinwoo Lee, B. Ju","doi":"10.1109/CCE.2006.350876","DOIUrl":"https://doi.org/10.1109/CCE.2006.350876","url":null,"abstract":"Carbon nanotube (CNT) integrated with biological functionalities is expected to be one of the most promising field in future biomedical applications. CNT material with prominent properties along with application of micro fabrication technology make possible enormous application potential sensors with high resolution, more accurate, higher sensitivity and micrometer size. One of these applications, introduced in this paper, is pH sensors using CNT as sensing material. Monitoring and evaluating the pH of the solution in a bioprocess is one of the key steps in the success of bioreactor operation. Our proposal based on the changes significantly in electrical property of CNT under different pH environment. This paper describes a method for designing a simple and fast response pH sensor employing single wall carbon nanotube (SWCNT) using a spray. The conductance and the typical amperometric response of SWCNT at room temperature at different hydroxyl ion concentrations were successfully demonstrated.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121618321","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}
We consider possible inclusion of quasi-cyclic low-density parity-check codes in the McEliece cryptosystem, in order to verify the joined security/error control action that this scheme can potentially achieve. As the linearity of the transformation from the private key to the public key exposes the system to the risk of a total break attack, suitable conditions tailored for this class of codes are presented and discussed.
{"title":"On the Usage of Quasi-Cyclic Low-Density Parity-Check Codes in the McEliece Cryptosystem","authors":"M. Baldi, F. Chiaraluce, R. Garello","doi":"10.1109/CCE.2006.350824","DOIUrl":"https://doi.org/10.1109/CCE.2006.350824","url":null,"abstract":"We consider possible inclusion of quasi-cyclic low-density parity-check codes in the McEliece cryptosystem, in order to verify the joined security/error control action that this scheme can potentially achieve. As the linearity of the transformation from the private key to the public key exposes the system to the risk of a total break attack, suitable conditions tailored for this class of codes are presented and discussed.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114204031","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}
We propose in this paper a simple receiver structure in which the radio frequency signal is directly digitized by the analog-to-digital converters (ADC) with a sampling frequency smaller than signal frequency. This structure is used for direction finding system by means of an antenna array. The direction of arrival (DOA) of RF signal is estimated using the proposed receiver architecture and the high resolution method MUSIC (multiple signal classification). The measurement system composed of a 4 quasi-Yagi antenna element uniform linear array and of 4 parallel digital receivers using a digital oscilloscope is built for validating this idea. The simulation results using ADS (Advanced Design System) software and the measurement results in anechoic chamber show that the DOA is accurately determined by this structure.
{"title":"A New Digital Receiver Architecture For Direction Finding Systems","authors":"V. Y. Vu, A.B. Delai","doi":"10.1109/CCE.2006.350863","DOIUrl":"https://doi.org/10.1109/CCE.2006.350863","url":null,"abstract":"We propose in this paper a simple receiver structure in which the radio frequency signal is directly digitized by the analog-to-digital converters (ADC) with a sampling frequency smaller than signal frequency. This structure is used for direction finding system by means of an antenna array. The direction of arrival (DOA) of RF signal is estimated using the proposed receiver architecture and the high resolution method MUSIC (multiple signal classification). The measurement system composed of a 4 quasi-Yagi antenna element uniform linear array and of 4 parallel digital receivers using a digital oscilloscope is built for validating this idea. The simulation results using ADS (Advanced Design System) software and the measurement results in anechoic chamber show that the DOA is accurately determined by this structure.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616085","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}
H. Nguyen, D. Nguyen, Hai-Minh Nguyen, Tung Le, Tuoi Dang, Q. Vu
In this paper, we report on our research and progress in Vietnamese Broadcast News transcription, with an emphasis on efficient modeling for more accurate recognition. In the acoustic modeling area, this was achieved through a re-alignment process, which considers all pronunciations for each word and outputs the pronunciation that best matches the acoustic data. The effectiveness of acoustic adaptation is greatly increased through unsupervised clustering of test data. In language modeling, we explored the use of non-broadcast-news training data as well as the adaptation to topic. Experimental results showed significant improvements in which the achieved WAR measured on a 1h test set was 84.2%, which gained absolutely 5.4% improvement over the baseline result (Nguyen and Vu, 2006 and Huynh et al., 2005).
在本文中，我们报告了我们在越南广播新闻转录方面的研究和进展，重点是有效的建模以获得更准确的识别。在声学建模领域，这是通过重新校准过程实现的，该过程考虑每个单词的所有发音，并输出最匹配声学数据的发音。通过对测试数据进行无监督聚类，大大提高了声学自适应的有效性。在语言建模方面，我们探索了非广播新闻训练数据的使用以及对主题的适应。实验结果显示了显著的改进，在1小时测试集上测量的WAR达到84.2%，比基线结果绝对提高了5.4% (Nguyen and Vu, 2006和Huynh et al.， 2005)。
{"title":"Progress in Transcription of Vietnamese Broadcast News","authors":"H. Nguyen, D. Nguyen, Hai-Minh Nguyen, Tung Le, Tuoi Dang, Q. Vu","doi":"10.1109/CCE.2006.350827","DOIUrl":"https://doi.org/10.1109/CCE.2006.350827","url":null,"abstract":"In this paper, we report on our research and progress in Vietnamese Broadcast News transcription, with an emphasis on efficient modeling for more accurate recognition. In the acoustic modeling area, this was achieved through a re-alignment process, which considers all pronunciations for each word and outputs the pronunciation that best matches the acoustic data. The effectiveness of acoustic adaptation is greatly increased through unsupervised clustering of test data. In language modeling, we explored the use of non-broadcast-news training data as well as the adaptation to topic. Experimental results showed significant improvements in which the achieved WAR measured on a 1h test set was 84.2%, which gained absolutely 5.4% improvement over the baseline result (Nguyen and Vu, 2006 and Huynh et al., 2005).","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131104959","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}
In this paper a new effective optimization algorithm called genetical swarm optimization (GSO) is presented. This is a hybrid algorithm developed in order to combine in the most effective way the properties of two of the most popular evolutionary optimization approaches now in use for the optimization of electromagnetic structures, the particle swarm optimization (PSO) and genetic algorithms (GA). This algorithm is essentially, as PSO and GA, a population-based heuristic search technique, which can be used to solve combinatorial optimization problems, modeled on the concepts of natural selection and evolution (GA) but also based on cultural and social rules derived from the analysis of the swarm intelligence and from the interaction among particles (PSO). Preliminary analyses are here presented with respect to the other optimization techniques dealing with a classical optimization problem. The optimized design of a printed reflectarray antenna is finally reported with numerical results.
{"title":"Genetical Swarm Optimization (GSO): a class of Population-based Algorithms for Antenna Design","authors":"F. Grimaccia, M. Mussetta, P. Pirinoli, R. Zich","doi":"10.1109/CCE.2006.350871","DOIUrl":"https://doi.org/10.1109/CCE.2006.350871","url":null,"abstract":"In this paper a new effective optimization algorithm called genetical swarm optimization (GSO) is presented. This is a hybrid algorithm developed in order to combine in the most effective way the properties of two of the most popular evolutionary optimization approaches now in use for the optimization of electromagnetic structures, the particle swarm optimization (PSO) and genetic algorithms (GA). This algorithm is essentially, as PSO and GA, a population-based heuristic search technique, which can be used to solve combinatorial optimization problems, modeled on the concepts of natural selection and evolution (GA) but also based on cultural and social rules derived from the analysis of the swarm intelligence and from the interaction among particles (PSO). Preliminary analyses are here presented with respect to the other optimization techniques dealing with a classical optimization problem. The optimized design of a printed reflectarray antenna is finally reported with numerical results.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132589511","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}
We propose an efficient algorithm using 3D morphological filtering for rejecting clutters in ultrasound color flow images. It consists of mask generation, preprocessing, and 3D morphological filtering. In the filtering, 2D binary opening is performed in spatial domain, which is followed by 2D binary opening in lateral-temporal domain. The shape and size of a structuring element for 2D opening are determined according to the statistical characteristics of the clutters and vessels. Simulation results have shown that the proposed algorithm is efficient to remove clutters from color flow images.
{"title":"Clutter Rejection Using 3D Morphological Filtering in Ultrasound Color Flow Images","authors":"Thanh-Son Nguyen, N. Kim, S. H. Kim","doi":"10.1109/CCE.2006.350811","DOIUrl":"https://doi.org/10.1109/CCE.2006.350811","url":null,"abstract":"We propose an efficient algorithm using 3D morphological filtering for rejecting clutters in ultrasound color flow images. It consists of mask generation, preprocessing, and 3D morphological filtering. In the filtering, 2D binary opening is performed in spatial domain, which is followed by 2D binary opening in lateral-temporal domain. The shape and size of a structuring element for 2D opening are determined according to the statistical characteristics of the clutters and vessels. Simulation results have shown that the proposed algorithm is efficient to remove clutters from color flow images.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115585950","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}
Wireless infrared optical CDMA (W-OCDMA) is a new developing technique with some useful applications. Control and efficient use of optical power is a key issue in analysis and design of these systems. Also, multi user interference is a major source if impairment in these system. As a result, power control is a key issue in design and implementation of these systems. In this article we investigate a dynamic resource management algorithm (DRMA) as a framework, which employs power control to enable QoS in terms of reliability for multimedia traffic in W-OCDMA networks using optical orthogonal codes (OOC's). A numerical method is also proposed to overcome computational difficulties of call admission control in base station to control user's power variation for different service levels. The results demonstrate techniques that can be used to create a local area W-OCDMA network with differentiated service.
{"title":"Power Control to Enable QoS for Indoor Wireless Infrared CDMA Networks","authors":"A. Aminzadeh-Gohari, M. R. Pakravan","doi":"10.1109/CCE.2006.350826","DOIUrl":"https://doi.org/10.1109/CCE.2006.350826","url":null,"abstract":"Wireless infrared optical CDMA (W-OCDMA) is a new developing technique with some useful applications. Control and efficient use of optical power is a key issue in analysis and design of these systems. Also, multi user interference is a major source if impairment in these system. As a result, power control is a key issue in design and implementation of these systems. In this article we investigate a dynamic resource management algorithm (DRMA) as a framework, which employs power control to enable QoS in terms of reliability for multimedia traffic in W-OCDMA networks using optical orthogonal codes (OOC's). A numerical method is also proposed to overcome computational difficulties of call admission control in base station to control user's power variation for different service levels. The results demonstrate techniques that can be used to create a local area W-OCDMA network with differentiated service.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123297423","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}
In this paper we perform computer simulations of a 3-dimensional waveguide by the method of moment based on an electric field integral equation (EFIE). The EFIE is derived in the similar way to derive the guided-mode extracted integral equation for a 2-dimensional waveguide. The EFIE can be solved with no use of mode expansion technique. Concentric step discontinuity structures are simulated. The numerical results are compared with numerical and experimental results.
{"title":"Computer Simulation of 3-Dimensional Waveguide by Electrilc Field Integral Equation","authors":"M. Tanaka, K. Tanaka","doi":"10.1109/CCE.2006.350866","DOIUrl":"https://doi.org/10.1109/CCE.2006.350866","url":null,"abstract":"In this paper we perform computer simulations of a 3-dimensional waveguide by the method of moment based on an electric field integral equation (EFIE). The EFIE is derived in the similar way to derive the guided-mode extracted integral equation for a 2-dimensional waveguide. The EFIE can be solved with no use of mode expansion technique. Concentric step discontinuity structures are simulated. The numerical results are compared with numerical and experimental results.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122569986","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}
This paper proposes a new channel estimation method for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in the presence of intersymbol interference (ISI). The proposed method uses special training sequences (TS) mainly for two reasons. Firstly, to obtain a desirable crest-factor of the transmitted training signal. Secondly, to eliminate the influence of ISI on the channel estimation performance. By using the recommended training sequences, one can avoid the ill-conditioned least square (LS) problem. To illustrate the proposed method, we assume that the system does not use a guard interval (GI). Simulation results show that the proposed method outperforms conventional methods with respect to the mean square error (MSE) of the estimated channel by more than 20 dB if the signal-to-noise ratio (SNR) is high.
{"title":"Channel Estimation for MIMO-OFDM Systems in the Case of Insufficient Guard Interval Length","authors":"V. D. Nguyen","doi":"10.1109/CCE.2006.350810","DOIUrl":"https://doi.org/10.1109/CCE.2006.350810","url":null,"abstract":"This paper proposes a new channel estimation method for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in the presence of intersymbol interference (ISI). The proposed method uses special training sequences (TS) mainly for two reasons. Firstly, to obtain a desirable crest-factor of the transmitted training signal. Secondly, to eliminate the influence of ISI on the channel estimation performance. By using the recommended training sequences, one can avoid the ill-conditioned least square (LS) problem. To illustrate the proposed method, we assume that the system does not use a guard interval (GI). Simulation results show that the proposed method outperforms conventional methods with respect to the mean square error (MSE) of the estimated channel by more than 20 dB if the signal-to-noise ratio (SNR) is high.","PeriodicalId":148533,"journal":{"name":"2006 First International Conference on Communications and Electronics","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016570","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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