Pub Date : 2013-05-15DOI: 10.1109/ECTICON.2013.6559570
T. Limpiti, M. Krairiksh
This paper presents the design of a linearly polarized pattern reconfigurable antenna whose configuration employs a single feed and a low profile cavity backed slot antenna. The grounded coplanar waveguide feed is adopted to excite the slotted Yagi-Uda structure which is constructed on the substrate integrated waveguide (SIW). The whole antenna is thus completely constructed on a single layer of a printed circuit board (PCB) substrate. The concept of pattern reconfiguration is based on switching function between the director- and the reflector-parasitic slots of PIN diodes. This antenna is designed to operate at the frequency of 24 GHz that there are various applications, e.g., Doppler sensor in automotive and industrial applications, security applications, and communication applications. The simulation results show good matching and interesting performance in reconfiguring the radiation patterns.
{"title":"Design of a 24 GHz pattern reconfigurable slotted Yagi-Uda antenna on substrate integrated waveguide","authors":"T. Limpiti, M. Krairiksh","doi":"10.1109/ECTICON.2013.6559570","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559570","url":null,"abstract":"This paper presents the design of a linearly polarized pattern reconfigurable antenna whose configuration employs a single feed and a low profile cavity backed slot antenna. The grounded coplanar waveguide feed is adopted to excite the slotted Yagi-Uda structure which is constructed on the substrate integrated waveguide (SIW). The whole antenna is thus completely constructed on a single layer of a printed circuit board (PCB) substrate. The concept of pattern reconfiguration is based on switching function between the director- and the reflector-parasitic slots of PIN diodes. This antenna is designed to operate at the frequency of 24 GHz that there are various applications, e.g., Doppler sensor in automotive and industrial applications, security applications, and communication applications. The simulation results show good matching and interesting performance in reconfiguring the radiation patterns.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123367222","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559624
Wirote Buaklee, K. Hongesombut
In a smart distribution grid environment, the applications of Distributed Generation (DG) are widely employed. Using these applications can have both positive and negative impacts on the distribution system. The sizing and location of their installations are the issues that should be taken into consideration to gain the maximum benefit. This paper presents an application of the Cuckoo Search (CS) for the optimal sizing and siting of DG in a smart distribution power system in order to minimize real power losses by maintaining the fault level and the voltage variation within the acceptable limit. The CS is inspired by the obligate brood parasitism of some cuckoo species by putting their eggs in the nests of other species. To demonstrate the effectiveness of the proposed methodology, a simplify 9-bus radial distribution system of the Provincial Electricity Authority of Thailand (PEA) is selected for the computer simulation with DIgSILENT software to explore the benefit of the optimal DG placement and the performance of the CS.
{"title":"Optimal DG allocation in a smart distribution grid using Cuckoo Search algorithm","authors":"Wirote Buaklee, K. Hongesombut","doi":"10.1109/ECTICON.2013.6559624","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559624","url":null,"abstract":"In a smart distribution grid environment, the applications of Distributed Generation (DG) are widely employed. Using these applications can have both positive and negative impacts on the distribution system. The sizing and location of their installations are the issues that should be taken into consideration to gain the maximum benefit. This paper presents an application of the Cuckoo Search (CS) for the optimal sizing and siting of DG in a smart distribution power system in order to minimize real power losses by maintaining the fault level and the voltage variation within the acceptable limit. The CS is inspired by the obligate brood parasitism of some cuckoo species by putting their eggs in the nests of other species. To demonstrate the effectiveness of the proposed methodology, a simplify 9-bus radial distribution system of the Provincial Electricity Authority of Thailand (PEA) is selected for the computer simulation with DIgSILENT software to explore the benefit of the optimal DG placement and the performance of the CS.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121169243","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559576
T. Khongdeach, Wachira Chongburee
In this research, a method to analyze frequency response and rectangular pulse response of branched power line is proposed. Many existing methods analyze the power line response by modelling the signal reflection paths from the branches. Those methods need to specifications of the paths, hence, more or less suffer from over-simplified reflection paths, especially when used on complicated network configurations. Unlike the existing methods, the proposed method requires no propagation path modelling. It first shrinks the branched network to a simple one-source-one-load network by using microwave theories to backward transform the impedances terminated at the power line branches to voltage source. Then, the voltage at the terminated loads can be determined by the expansion. The rectangular pulse response can be found by using invert fast Fourier transform of the series of frequency response. Comparison of the pulse response to widely known methods is provided.
{"title":"A method to analyze communication bandwidth and pulse response of power lines with branches using backward impedance transform technique","authors":"T. Khongdeach, Wachira Chongburee","doi":"10.1109/ECTICON.2013.6559576","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559576","url":null,"abstract":"In this research, a method to analyze frequency response and rectangular pulse response of branched power line is proposed. Many existing methods analyze the power line response by modelling the signal reflection paths from the branches. Those methods need to specifications of the paths, hence, more or less suffer from over-simplified reflection paths, especially when used on complicated network configurations. Unlike the existing methods, the proposed method requires no propagation path modelling. It first shrinks the branched network to a simple one-source-one-load network by using microwave theories to backward transform the impedances terminated at the power line branches to voltage source. Then, the voltage at the terminated loads can be determined by the expansion. The rectangular pulse response can be found by using invert fast Fourier transform of the series of frequency response. Comparison of the pulse response to widely known methods is provided.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116374869","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559542
Charoenchai Lueang-on, C. Tantibundhit, S. Muengtaweepongsa
Transcranial Doppler (TCD), a non-invasive approach to measure blood flow velocities in brain arteries, can be used to detect emboli in cerebral circulation. Classification of a measured TCD as an embolic signal (ES) or artifact is usually performed by a well-trained physician referred to as a gold standard. However, human error and inter-rater reliability among physicians are unavoidable issues. Therefore, an automatic ES detection system is useful as a medical support system especially for the countries where a number of well-trained physicians are limited. However, in clinical application, the computation complexity of the automatic ES detection algorithm should have been considered. As an example, our previous work, the automatic embolic signal detection algorithm using adaptive wavelet packet transform (AWPT) and adaptive neuro-fuzzy inference system (ANFIS) (Lueang-on et al., Proc. of ISC, 2013), could provide impressive sensitivity and specificity, the algorithm is considerable complicated. In this study, we aim to develop further the algorithm that still provides high detection accuracy yet significantly reduces the processing time. To do so, a number of fuzzy rules in the ANFIS model are optimized. Two data sets, training and validation sets composed of 176 ESs and 484 artifacts were used to evaluate the algorithm resulting in a sensitivity of 95.5% and specificity of 95.4%. The processing time for classification can be reduced by 63% compared with our previous algorithm. The results suggested that the algorithm could be used as a medical support system more efficiently.
经颅多普勒(TCD)是一种测量脑动脉血流速度的无创方法，可用于检测脑循环中的栓塞。将测量的TCD分类为栓塞信号(ES)或伪信号通常由训练有素的医生执行，称为金标准。然而，医生之间的人为错误和评估者之间的可靠性是不可避免的问题。因此，自动ES检测系统作为一种医疗支持系统是有用的，特别是对于那些训练有素的医生数量有限的国家。但在临床应用中，应考虑ES自动检测算法的计算复杂度。例如，我们之前的工作，使用自适应小波包变换(AWPT)和自适应神经模糊推理系统(ANFIS)的栓塞信号自动检测算法(luang -on et al.， Proc. of ISC, 2013)可以提供令人满意的灵敏度和特异性，但算法相当复杂。在本研究中，我们的目标是进一步开发算法，在提供高检测精度的同时显著缩短处理时间。为此，对ANFIS模型中的一些模糊规则进行了优化。使用176个ESs和484个伪影组成的训练集和验证集对算法进行评估，结果表明该算法的灵敏度为95.5%，特异性为95.4%。与之前的算法相比，分类处理时间减少了63%。结果表明，该算法可以更有效地作为医疗支持系统使用。
{"title":"Processing time improvement for automatic embolic signal detection using fuzzy c-mean","authors":"Charoenchai Lueang-on, C. Tantibundhit, S. Muengtaweepongsa","doi":"10.1109/ECTICON.2013.6559542","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559542","url":null,"abstract":"Transcranial Doppler (TCD), a non-invasive approach to measure blood flow velocities in brain arteries, can be used to detect emboli in cerebral circulation. Classification of a measured TCD as an embolic signal (ES) or artifact is usually performed by a well-trained physician referred to as a gold standard. However, human error and inter-rater reliability among physicians are unavoidable issues. Therefore, an automatic ES detection system is useful as a medical support system especially for the countries where a number of well-trained physicians are limited. However, in clinical application, the computation complexity of the automatic ES detection algorithm should have been considered. As an example, our previous work, the automatic embolic signal detection algorithm using adaptive wavelet packet transform (AWPT) and adaptive neuro-fuzzy inference system (ANFIS) (Lueang-on et al., Proc. of ISC, 2013), could provide impressive sensitivity and specificity, the algorithm is considerable complicated. In this study, we aim to develop further the algorithm that still provides high detection accuracy yet significantly reduces the processing time. To do so, a number of fuzzy rules in the ANFIS model are optimized. Two data sets, training and validation sets composed of 176 ESs and 484 artifacts were used to evaluate the algorithm resulting in a sensitivity of 95.5% and specificity of 95.4%. The processing time for classification can be reduced by 63% compared with our previous algorithm. The results suggested that the algorithm could be used as a medical support system more efficiently.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126525786","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559577
Weeraya Siriwatworasakul, N. Hoonchareon
Conventional protection system uses only electric signal from each device to detect fault and protect equipment. Thus, there are some weak points in the protection system. Wide Area Protection system (WAPs) can improve the performance of protection system because it uses the communication and transferred data between IED-relays to identify fault. This paper proposes the conceptual design structure of the WAPs, zone partitioning and detecting algorithm in order to improve the performance of the protection system. Analysis of the case study shows that the proposed concept of WAPs can eliminate some weaknesses of conventional protection system in transmission system such as reduce tripping equipment and outage area.
传统的保护系统仅利用来自各个设备的电信号来检测故障并保护设备。因此，在保护系统中存在一些薄弱环节。广域保护系统(Wide Area Protection system, wap)利用ied继电器之间的通信和传输数据来识别故障，可以提高保护系统的性能。为了提高保护系统的性能，本文提出了wap的概念设计结构、区域划分和检测算法。实例分析表明，所提出的wap概念可以消除传统输电系统保护系统的一些缺点，如减少跳闸设备和停电面积。
{"title":"Conceptual design of Wide Area Protection in transmission system","authors":"Weeraya Siriwatworasakul, N. Hoonchareon","doi":"10.1109/ECTICON.2013.6559577","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559577","url":null,"abstract":"Conventional protection system uses only electric signal from each device to detect fault and protect equipment. Thus, there are some weak points in the protection system. Wide Area Protection system (WAPs) can improve the performance of protection system because it uses the communication and transferred data between IED-relays to identify fault. This paper proposes the conceptual design structure of the WAPs, zone partitioning and detecting algorithm in order to improve the performance of the protection system. Analysis of the case study shows that the proposed concept of WAPs can eliminate some weaknesses of conventional protection system in transmission system such as reduce tripping equipment and outage area.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125664365","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559505
Pawat Phuaknoi, J. Buajarern, A. Tonmueanwai
A Michelson interferometer method for determining the variation in length of gauge blocks is presented. This method is based on phase shift interferometer measuring a fringe fraction of the interference fringes on a gauge block measuring surface and its auxiliary plate. The reference standard of measurement is the wavelength of stabilized He-Ne Laser at 633 nm which is traceable to the international standard of the metre. The system was also verified by the 543 nm stabilized He-Ne Laser. The interference fringe patterns are observed by a CCD camera and the images are processed by a Machine Vision system. This make the system run automatically and fulfill. The measurement results were compared with the standard method and they agree with comparable uncertainty.
{"title":"Variation in length of gauge blocks calibration using interferometry technique and machine vision","authors":"Pawat Phuaknoi, J. Buajarern, A. Tonmueanwai","doi":"10.1109/ECTICON.2013.6559505","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559505","url":null,"abstract":"A Michelson interferometer method for determining the variation in length of gauge blocks is presented. This method is based on phase shift interferometer measuring a fringe fraction of the interference fringes on a gauge block measuring surface and its auxiliary plate. The reference standard of measurement is the wavelength of stabilized He-Ne Laser at 633 nm which is traceable to the international standard of the metre. The system was also verified by the 543 nm stabilized He-Ne Laser. The interference fringe patterns are observed by a CCD camera and the images are processed by a Machine Vision system. This make the system run automatically and fulfill. The measurement results were compared with the standard method and they agree with comparable uncertainty.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"19 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125782576","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559548
J. Sartthong, S. Sittichivapak, A. Kaewpukdee, I. Boonpikum
Backoff algorithm is a technique to reduce packet collisions and to improve throughput efficiency in wireless local area network (WLAN). In this research, we propose a new backoff algorithm which is named Binary Exponential Increment Half Decrement (BEIHD) backoff algorithm. Furthermore, we introduce a new discrete Markov chain model for modeling the performance analysis of wireless local area network. A new model is called the Fixed Backoff stages and Fixed Contention windows (FBFC) technique. In FBFC scheme, the accuracy of the transmission probability parameter is derived from step by step procedure using the global balance equation concept in steady state condition. The saturated throughput efficiency of all backoff algorithms is compared under the same Physical layer (PHY) parameters and Medium Access Control (MAC) scheme in IEEE802.11a/b/g standards. Our numerical results show that the throughput performance of BEIHD backoff algorithm is better than the Binary Exponential Backoff (BEB) algorithm. Moreover, the distinction of BEIHD backoff algorithm is near the realistic system, and it can be implemented without to modify hardware in physical layer.
{"title":"Binary Exponential Increment Half Decrement backoff algorithm for IEEE802.11 wireless LANs","authors":"J. Sartthong, S. Sittichivapak, A. Kaewpukdee, I. Boonpikum","doi":"10.1109/ECTICON.2013.6559548","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559548","url":null,"abstract":"Backoff algorithm is a technique to reduce packet collisions and to improve throughput efficiency in wireless local area network (WLAN). In this research, we propose a new backoff algorithm which is named Binary Exponential Increment Half Decrement (BEIHD) backoff algorithm. Furthermore, we introduce a new discrete Markov chain model for modeling the performance analysis of wireless local area network. A new model is called the Fixed Backoff stages and Fixed Contention windows (FBFC) technique. In FBFC scheme, the accuracy of the transmission probability parameter is derived from step by step procedure using the global balance equation concept in steady state condition. The saturated throughput efficiency of all backoff algorithms is compared under the same Physical layer (PHY) parameters and Medium Access Control (MAC) scheme in IEEE802.11a/b/g standards. Our numerical results show that the throughput performance of BEIHD backoff algorithm is better than the Binary Exponential Backoff (BEB) algorithm. Moreover, the distinction of BEIHD backoff algorithm is near the realistic system, and it can be implemented without to modify hardware in physical layer.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121983735","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559490
N. Sakuna, R. Muanghlua, S. Niemcharoen, A. Ruangphanit, A. Poyai
This paper presents the temperature and devices dimension dependence on the threshold voltage, low field mobility and series parasitic resistance of PMOS over operating temperature range of 27 °C to 125 °C. The relation of IDS and VGS in linear region was used with a different of channel length and channel width. The parameters extraction procedure is based on the measurement of the transconductance characteristics of MOSFET in linear region. The results show that, the temperature coefficient for threshold voltage is around 1.7mV/K approximately. The low field mobility degradation parameter is decreased by the factor of 0.68. The temperature coefficient of source-drain series resistance per unit channel width (RDSW) is approximately 16.7 ohm-um/K. These data are necessary not only should be compared with the results of NMOS but also should be used for the circuit designer to understanding well in the elevated operating temperatures.
{"title":"Temperature and devices dimension dependence on threshold voltage, the low field mobilty and the series parasitic resistance of PMOSFET","authors":"N. Sakuna, R. Muanghlua, S. Niemcharoen, A. Ruangphanit, A. Poyai","doi":"10.1109/ECTICON.2013.6559490","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559490","url":null,"abstract":"This paper presents the temperature and devices dimension dependence on the threshold voltage, low field mobility and series parasitic resistance of PMOS over operating temperature range of 27 °C to 125 °C. The relation of IDS and VGS in linear region was used with a different of channel length and channel width. The parameters extraction procedure is based on the measurement of the transconductance characteristics of MOSFET in linear region. The results show that, the temperature coefficient for threshold voltage is around 1.7mV/K approximately. The low field mobility degradation parameter is decreased by the factor of 0.68. The temperature coefficient of source-drain series resistance per unit channel width (RDSW) is approximately 16.7 ohm-um/K. These data are necessary not only should be compared with the results of NMOS but also should be used for the circuit designer to understanding well in the elevated operating temperatures.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121448255","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559544
Tanapong Khomyat, P. Uthansakul, M. Uthansakul
It is the fact that the bandwidth of wireless communication system is such a limited resource that several techniques are selectively applied to increase the bandwidth efficiency. The highest bandwidth efficiency can be taken by applying MU-MIMO technique. For this technique, the complexity of detection at receiving side is rapidly increased by increasing the number of users at transmitting side. Therefore the lower complex detection is necessarily required for MUMIMO system. Recently, the simple detection technique called hybrid-MIMO receiver scheme (HMRS) has been proposed by the authors. However, that study neglected the demands of multiple users for transmitting MIMO modes (STBC or SM) which are crucially unpredictable in practice. In this paper, the performance of MU-MIMO system using HMRS technique to support various types of user transmission modes is presented. The results indicate that the HMRS technique can significantly improve the error rate for any modes of transmission.
{"title":"Performance of MU-MIMO systems using HMRS technique for various transmission modes","authors":"Tanapong Khomyat, P. Uthansakul, M. Uthansakul","doi":"10.1109/ECTICON.2013.6559544","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559544","url":null,"abstract":"It is the fact that the bandwidth of wireless communication system is such a limited resource that several techniques are selectively applied to increase the bandwidth efficiency. The highest bandwidth efficiency can be taken by applying MU-MIMO technique. For this technique, the complexity of detection at receiving side is rapidly increased by increasing the number of users at transmitting side. Therefore the lower complex detection is necessarily required for MUMIMO system. Recently, the simple detection technique called hybrid-MIMO receiver scheme (HMRS) has been proposed by the authors. However, that study neglected the demands of multiple users for transmitting MIMO modes (STBC or SM) which are crucially unpredictable in practice. In this paper, the performance of MU-MIMO system using HMRS technique to support various types of user transmission modes is presented. The results indicate that the HMRS technique can significantly improve the error rate for any modes of transmission.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"358 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115881410","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 : 2013-05-15DOI: 10.1109/ECTICON.2013.6559575
Thanapat Chotprom, N. Hoonchareon
This paper shows impact of mutual coupling between circuits on accuracy of transmission line fault location using field data. Both one- and two-terminal test results are shown. Two- terminal test shows the test results with simulated and field data. Meanwhile, in case of one-terminal, the test emphasizes on showing test results with field data. The improved accuracy has been verified by comparing to those obtained from the standard algorithms. These tests were accomplished by using ATP-EMTP and applications which are developed on MATLAB.
{"title":"Improved transmission line fault location considering mutual coupling between circuits","authors":"Thanapat Chotprom, N. Hoonchareon","doi":"10.1109/ECTICON.2013.6559575","DOIUrl":"https://doi.org/10.1109/ECTICON.2013.6559575","url":null,"abstract":"This paper shows impact of mutual coupling between circuits on accuracy of transmission line fault location using field data. Both one- and two-terminal test results are shown. Two- terminal test shows the test results with simulated and field data. Meanwhile, in case of one-terminal, the test emphasizes on showing test results with field data. The improved accuracy has been verified by comparing to those obtained from the standard algorithms. These tests were accomplished by using ATP-EMTP and applications which are developed on MATLAB.","PeriodicalId":273802,"journal":{"name":"2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132563673","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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