首页 > 最新文献

2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology最新文献

英文 中文
A frequency domain fractionally-spaced CG-MOE detection technique for MC-CDMA systems 一种用于MC-CDMA系统的频域分数间隔CG-MOE检测技术
Krongkarn Suebjakplong, P. Yuvapoositanon
In this paper, a frequency domain fractionally-spaced conjugate gradient minimum output energy (FDFS-CG-MOE) algorithm is proposed as a new detection technique for MC-CDMA systems. The proposed technique exploits the oversampled received signals in the frequency domain before detection with the CG-MOE algorithm. Simulation results show that the proposed technique has better performance to cope with the effect resulting from frequency offset, multipath channel and near-far problem caused by powerful interfering users than the conventional CG-MOE and MOE algorithms.
本文提出了一种频域分数间隔共轭梯度最小输出能量(FDFS-CG-MOE)算法,作为MC-CDMA系统的一种新的检测技术。该技术利用CG-MOE算法检测前接收信号在频域的过采样。仿真结果表明,与传统的CG-MOE和MOE算法相比,该算法在处理频偏、多径信道和强干扰用户引起的近远问题方面具有更好的性能。
{"title":"A frequency domain fractionally-spaced CG-MOE detection technique for MC-CDMA systems","authors":"Krongkarn Suebjakplong, P. Yuvapoositanon","doi":"10.1109/ECTICON.2012.6254296","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254296","url":null,"abstract":"In this paper, a frequency domain fractionally-spaced conjugate gradient minimum output energy (FDFS-CG-MOE) algorithm is proposed as a new detection technique for MC-CDMA systems. The proposed technique exploits the oversampled received signals in the frequency domain before detection with the CG-MOE algorithm. Simulation results show that the proposed technique has better performance to cope with the effect resulting from frequency offset, multipath channel and near-far problem caused by powerful interfering users than the conventional CG-MOE and MOE algorithms.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"87 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84046729","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}
引用次数: 0
On load balancing of hybrid OpenCL/Global Arrays applications on heterogeneous platforms 异构平台上OpenCL/Global Arrays混合应用的负载平衡研究
E. Kijsipongse, S. U-ruekolan
In the recent years, high performance computing (HPC) resources has grown up rapidly and diversely. The next generation of HPC platforms is assembled from resources of various types such as multi-core CPUs and GPUs. Thus, the development of a parallel program to fully utilize heterogeneously distributed resources in HPC environment is a challenge. A parallel program should be portable and able to run efficiently on all types of computing resources with the least effort. We combine the advantages of Global Arrays and OpenCL for such the parallel programs. We employ the OpenCL in implementing parallel applications at fine-grain level so that they can execute across heterogeneous platforms. At coarse grain level, we utilize the Global Arrays for efficient data communication between computing resources in terms of virtually shared memory. In addition, we also propose a load balancing technique based on the task pool model for hybrid OpenCL/Global Arrays applications on heterogeneous platforms to improve the performance of the applications.
近年来,高性能计算(high performance computing, HPC)资源增长迅速,种类繁多。下一代高性能计算平台是由多核cpu、gpu等多种资源组合而成的。因此,在高性能计算环境下,开发一种能够充分利用异构分布资源的并行程序是一个挑战。并行程序应该是可移植的,并且能够以最少的努力在所有类型的计算资源上有效地运行。我们结合了全局数组和OpenCL的优点来实现这种并行程序。我们使用OpenCL在细粒度级别实现并行应用程序,以便它们可以跨异构平台执行。在粗粒度级别,我们利用全局数组在虚拟共享内存的计算资源之间进行有效的数据通信。此外,我们还针对异构平台上的OpenCL/Global Arrays混合应用提出了一种基于任务池模型的负载均衡技术,以提高应用的性能。
{"title":"On load balancing of hybrid OpenCL/Global Arrays applications on heterogeneous platforms","authors":"E. Kijsipongse, S. U-ruekolan","doi":"10.1109/ECTICON.2012.6254344","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254344","url":null,"abstract":"In the recent years, high performance computing (HPC) resources has grown up rapidly and diversely. The next generation of HPC platforms is assembled from resources of various types such as multi-core CPUs and GPUs. Thus, the development of a parallel program to fully utilize heterogeneously distributed resources in HPC environment is a challenge. A parallel program should be portable and able to run efficiently on all types of computing resources with the least effort. We combine the advantages of Global Arrays and OpenCL for such the parallel programs. We employ the OpenCL in implementing parallel applications at fine-grain level so that they can execute across heterogeneous platforms. At coarse grain level, we utilize the Global Arrays for efficient data communication between computing resources in terms of virtually shared memory. In addition, we also propose a load balancing technique based on the task pool model for hybrid OpenCL/Global Arrays applications on heterogeneous platforms to improve the performance of the applications.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"20 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82361010","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}
引用次数: 1
Hybrid algorithm for training feed-forward neural networks using PSO-information gain with back propagation algorithm 利用pso -信息增益与反向传播算法训练前馈神经网络的混合算法
T. Sanguanchue, K. Jearanaitanakij
This paper proposes a hybrid algorithm for training a feed-forward neural network by combining both Particle Swarm Optimization (PSO) and Information Gain with Backpropagation (BP) algorithm. A conventional neural network training algorithm, i.e. BP, has several drawbacks in its slow convergence and local optima. Although PSO can be applied to search for the near optimal set of weights in the neural network, it may still stuck in the local optima because its fitness function depends merely on the error of the network. By combining the information gain of attributes in the dataset with the fitness function of PSO to train weights in the neural network, we find out that the resulting network has a significant improvement on its recognition rate. The comparisons among other training algorithm on two real-world datasets are provided and discussed.
本文提出了一种将粒子群算法(PSO)和信息增益与反向传播(BP)算法相结合的前馈神经网络混合训练算法。传统的神经网络训练算法BP存在收敛速度慢、局部最优等缺点。虽然粒子群算法可以在神经网络中搜索接近最优的权值集,但由于其适应度函数仅取决于网络的误差,因此仍然可能停留在局部最优。将数据集中属性的信息增益与粒子群算法的适应度函数相结合,对神经网络进行权值训练,得到的网络识别率有明显提高。并对其他训练算法在两个真实数据集上的比较进行了讨论。
{"title":"Hybrid algorithm for training feed-forward neural networks using PSO-information gain with back propagation algorithm","authors":"T. Sanguanchue, K. Jearanaitanakij","doi":"10.1109/ECTICON.2012.6254157","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254157","url":null,"abstract":"This paper proposes a hybrid algorithm for training a feed-forward neural network by combining both Particle Swarm Optimization (PSO) and Information Gain with Backpropagation (BP) algorithm. A conventional neural network training algorithm, i.e. BP, has several drawbacks in its slow convergence and local optima. Although PSO can be applied to search for the near optimal set of weights in the neural network, it may still stuck in the local optima because its fitness function depends merely on the error of the network. By combining the information gain of attributes in the dataset with the fitness function of PSO to train weights in the neural network, we find out that the resulting network has a significant improvement on its recognition rate. The comparisons among other training algorithm on two real-world datasets are provided and discussed.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"33 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87690052","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}
引用次数: 5
Independent rise and fall edge dead time generator based on monostable multivibrator circuit 基于单稳态多振子电路的独立升降沿死区发生器
K. Phothi, J. Koseeyaporn, P. Wardkein
In this paper, the independent rise and fall edge dead time generator for switching control signal is presented. The scheme of the proposed circuit is based on the monostable multivibrator circuit together with the toggle circuit that use JK flip-flop to operate, OR Gate, AND Gate and NOT Gate. The obtained results from simulation and experiment affirm that the dead time at rise and fall edge of switching obtained from the proposed scheme can be independently controlled. The control ability is achieved by adjusting the resistance of the resistor or capacitance of the capacitor that are combined in monostable multivibrator circuit. The proposed circuit is easily implemented and provides the precise dead time duration, at least in nanosecond level. Furthermore, it can operate effectively at high frequency condition. It hence can be employed in various applications.
本文介绍了开关控制信号的独立升降沿死区发生器。本文提出的电路方案是基于单稳态多振电路和使用JK触发器进行操作的切换电路,或门、与门和非门。仿真和实验结果表明,该方案得到的开关上升沿和下降沿死区时间是可以独立控制的。控制能力是通过调整单稳态多振器电路中组合的电阻的电阻或电容的电容来实现的。该电路易于实现,并提供精确的死区持续时间,至少在纳秒级。此外,它可以在高频条件下有效地工作。因此,它可以用于各种应用。
{"title":"Independent rise and fall edge dead time generator based on monostable multivibrator circuit","authors":"K. Phothi, J. Koseeyaporn, P. Wardkein","doi":"10.1109/ECTICON.2012.6254153","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254153","url":null,"abstract":"In this paper, the independent rise and fall edge dead time generator for switching control signal is presented. The scheme of the proposed circuit is based on the monostable multivibrator circuit together with the toggle circuit that use JK flip-flop to operate, OR Gate, AND Gate and NOT Gate. The obtained results from simulation and experiment affirm that the dead time at rise and fall edge of switching obtained from the proposed scheme can be independently controlled. The control ability is achieved by adjusting the resistance of the resistor or capacitance of the capacitor that are combined in monostable multivibrator circuit. The proposed circuit is easily implemented and provides the precise dead time duration, at least in nanosecond level. Furthermore, it can operate effectively at high frequency condition. It hence can be employed in various applications.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"125 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88029898","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}
引用次数: 3
Advanced distribution Transformer Load Monitoring 高级配电变压器负荷监测
A. Wornpuen, N. Charbkaew, T. Bunyagul
The Transformer Load Monitoring system (TLM) is a project aimed to reduce cost, increase efficiency and improve services to customers. The project was created by Metropolitan Electricity Authority (MEA) Thailand. The purpose was to build a monitoring system for medium voltage distribution transformers. These transformers have been installed on roadside electric poles around Bangkok. Transformers' data is significant to load management and research about transformers. An advanced distribution transformer load monitoring system is capable of measuring voltage, current and power. It separates transformers into small groups and communicates within the group using and radio frequency module operating at unlicensed 433 MHz band. All collected data are sent to a master unit using a GSM modem saved to a database server.
变压器负荷监测系统(TLM)是一个旨在降低成本、提高效率和改善客户服务的项目。该项目由泰国大都会电力局(MEA)创建。目的是建立一个中压配电变压器监测系统。这些变压器被安装在曼谷附近的路边电线杆上。变压器的数据对变压器的负荷管理和研究具有重要意义。一种先进的配电变压器负荷监测系统,能够测量电压、电流和功率。它将变压器分成小组,并在小组内使用未经许可的433 MHz频段的无线电频率模块进行通信。所有收集的数据通过保存在数据库服务器上的GSM调制解调器发送到主设备。
{"title":"Advanced distribution Transformer Load Monitoring","authors":"A. Wornpuen, N. Charbkaew, T. Bunyagul","doi":"10.1109/ECTICON.2012.6254365","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254365","url":null,"abstract":"The Transformer Load Monitoring system (TLM) is a project aimed to reduce cost, increase efficiency and improve services to customers. The project was created by Metropolitan Electricity Authority (MEA) Thailand. The purpose was to build a monitoring system for medium voltage distribution transformers. These transformers have been installed on roadside electric poles around Bangkok. Transformers' data is significant to load management and research about transformers. An advanced distribution transformer load monitoring system is capable of measuring voltage, current and power. It separates transformers into small groups and communicates within the group using and radio frequency module operating at unlicensed 433 MHz band. All collected data are sent to a master unit using a GSM modem saved to a database server.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"21 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82781388","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}
引用次数: 6
DeVise: A tool for visualizing and validating desynchronization protocols for multi-hop wireless sensor networks 用于可视化和验证多跳无线传感器网络的去同步协议的工具
S. Choochaisri, S. Aurburananont, A. Saowwapak-adisak, C. Intanagonwiwat
In recent years, there are several studies on desynchronization for wireless sensor networks. In order to propose new desynchronization protocols, unavoidably, researchers have to implement previous desynchronization works to compare with their own protocols. However, validating the implementations takes time and effort. In this paper, we propose DeVise, a visualizer for validating desynchronization protocols on multi-hop wireless sensor networks. DeVise reads configuration and trace files, and visualizes the protocol behavior. DeVise provides sufficient and useful information to help researchers reduce time and effort in the protocol validation process. We have evaluated DeVise with several desynchronization protocols. The result shows that DeVise helps researchers validate the implementations and effectively helps explore advantages and drawbacks when comparing different desynchronization protocols.
近年来,人们对无线传感器网络的去同步进行了一些研究。为了提出新的非同步协议,研究人员不可避免地要将以前的非同步工作与自己的协议进行比较。然而,验证实现需要时间和精力。在本文中,我们提出了一个用于验证多跳无线传感器网络上的不同步协议的可视化工具。设计读取配置和跟踪文件,并可视化协议行为。设计提供了充分和有用的信息,以帮助研究人员减少在协议验证过程中的时间和精力。我们已经用几种非同步协议对设计进行了评估。结果表明,设计有助于研究人员验证实现,并在比较不同的去同步协议时有效地帮助探索优缺点。
{"title":"DeVise: A tool for visualizing and validating desynchronization protocols for multi-hop wireless sensor networks","authors":"S. Choochaisri, S. Aurburananont, A. Saowwapak-adisak, C. Intanagonwiwat","doi":"10.1109/ECTICON.2012.6254332","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254332","url":null,"abstract":"In recent years, there are several studies on desynchronization for wireless sensor networks. In order to propose new desynchronization protocols, unavoidably, researchers have to implement previous desynchronization works to compare with their own protocols. However, validating the implementations takes time and effort. In this paper, we propose DeVise, a visualizer for validating desynchronization protocols on multi-hop wireless sensor networks. DeVise reads configuration and trace files, and visualizes the protocol behavior. DeVise provides sufficient and useful information to help researchers reduce time and effort in the protocol validation process. We have evaluated DeVise with several desynchronization protocols. The result shows that DeVise helps researchers validate the implementations and effectively helps explore advantages and drawbacks when comparing different desynchronization protocols.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"8 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90190412","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}
引用次数: 1
All inkjet-printed chemical gas sensors based on CNT/polymer nanocomposites: Comparison between double printed layers and blended single layer 基于碳纳米管/聚合物纳米复合材料的全喷墨打印化学气体传感器:双打印层与混合单层的比较
P. Lorwongtragool, E. Sowade, T. Kerdcharoen, R. Baumann
Gas sensors based on carbon nanotube (CNT)/ polymer nanocomposite were fabricated by a fully inkjet-printing method. The CNT/polymer layers acting as sensing layer were prepared by 2 methods; (i) deposition of separated layer of CNT and polymer to form a composite-like structure at the interface and (ii) deposition of blend CNT and polymer to obtain completely composite layer. Difference of sensor responses was demonstrated. We have found that the sensor with a composite-like layer provides a good response to volatile organic compounds (VOCs) as compared to the sensor obtained from printing CNT/polymer composite. The results have also demonstrated that the capability of the CNT/polymer composite sensor allows detecting VOCs in broad range of concentration.
采用全喷墨打印技术制备了基于碳纳米管/聚合物纳米复合材料的气体传感器。采用两种方法制备了碳纳米管/聚合物层作为传感层;(1)碳纳米管与聚合物分离层沉积,在界面处形成类似复合结构;(2)碳纳米管与聚合物共混层沉积,得到完全复合层。分析了不同传感器响应的差异。我们发现,与打印碳纳米管/聚合物复合材料获得的传感器相比,具有复合材料层的传感器对挥发性有机化合物(VOCs)提供了良好的响应。结果还表明,碳纳米管/聚合物复合传感器的能力可以在很宽的浓度范围内检测voc。
{"title":"All inkjet-printed chemical gas sensors based on CNT/polymer nanocomposites: Comparison between double printed layers and blended single layer","authors":"P. Lorwongtragool, E. Sowade, T. Kerdcharoen, R. Baumann","doi":"10.1109/ECTICON.2012.6254171","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254171","url":null,"abstract":"Gas sensors based on carbon nanotube (CNT)/ polymer nanocomposite were fabricated by a fully inkjet-printing method. The CNT/polymer layers acting as sensing layer were prepared by 2 methods; (i) deposition of separated layer of CNT and polymer to form a composite-like structure at the interface and (ii) deposition of blend CNT and polymer to obtain completely composite layer. Difference of sensor responses was demonstrated. We have found that the sensor with a composite-like layer provides a good response to volatile organic compounds (VOCs) as compared to the sensor obtained from printing CNT/polymer composite. The results have also demonstrated that the capability of the CNT/polymer composite sensor allows detecting VOCs in broad range of concentration.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83305613","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}
引用次数: 8
All-optical S-R flip-flop using dark-bright soliton conversion control 采用暗-亮孤子转换控制的全光S-R触发器
S. Soysouvanh, K. Luangxaysana, P. Phongsanam, S. Mitatha, M. Yoshida, N. Komine, P. Yupapin
We propose a new design for all-optical S-R flip-flop using optical technique namely dark-bright soliton conversion control within an optical add-drop filter. In operation, all-optical data input logic `0', `1' is formed by dark soliton (D) and bright soliton (B) pulses, respectively. The conversion behaviour between dark and bright soliton pulses can be obtained and formed the logic pulses by a π/2 phase shifted device (i.e. an optical coupler), in which the binary logic operation can be formed simultaneously at the thought and drop ports, respectively. In all-optical S-R flip-flop application can be recognized as a simple and flexible system for forming the logic switching system. Numerical simulation results are obtained and confirmed for the useful application, in which the advanced logical system can be operated.
我们提出了一种新的全光S-R触发器设计,该触发器采用光学技术,即在光学加降滤波器内进行暗-亮孤子转换控制。在工作中,全光数据输入逻辑“0”、“1”分别由暗孤子(D)和亮孤子(B)脉冲构成。利用π/2相移器件(即光耦合器)可以获得暗孤子脉冲与亮孤子脉冲之间的转换行为并形成逻辑脉冲,其中可以在思想口和丢口分别同时形成二进制逻辑运算。在全光S-R触发器的应用中,可以将其看作是构成逻辑开关系统的一个简单而灵活的系统。数值仿真结果验证了该系统的实际应用,证明了该系统的可行性。
{"title":"All-optical S-R flip-flop using dark-bright soliton conversion control","authors":"S. Soysouvanh, K. Luangxaysana, P. Phongsanam, S. Mitatha, M. Yoshida, N. Komine, P. Yupapin","doi":"10.1109/ECTICON.2012.6254110","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254110","url":null,"abstract":"We propose a new design for all-optical S-R flip-flop using optical technique namely dark-bright soliton conversion control within an optical add-drop filter. In operation, all-optical data input logic `0', `1' is formed by dark soliton (D) and bright soliton (B) pulses, respectively. The conversion behaviour between dark and bright soliton pulses can be obtained and formed the logic pulses by a π/2 phase shifted device (i.e. an optical coupler), in which the binary logic operation can be formed simultaneously at the thought and drop ports, respectively. In all-optical S-R flip-flop application can be recognized as a simple and flexible system for forming the logic switching system. Numerical simulation results are obtained and confirmed for the useful application, in which the advanced logical system can be operated.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"39 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83480279","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}
引用次数: 3
Subcarrier clustering for MISO-OFDM channels with quantized beamforming 量化波束形成的MISO-OFDM信道的子载波聚类
Kritsada Mamat, W. Santipach
We consider a transmit beamforming for an OFDM channel with multiple transmit antennas and single receive antenna. With channel information, a receiver selects and quantizes transmit beamforming vector for each subcarrier. The quantized beamformers are then relayed to the transmitter via a rate-limited feedback channel. We propose to reduce the required number of feedback bits by applying a common transmit beamformer for a cluster of adjacent subcarriers. The sum capacity over all subcarriers depends on a cluster size, the number of feedback bits, and the number of channel taps. Approximation of the optimal cluster size that maximizes the sum rates is derived and is shown to predict simulation results very well. Numerical results show that operating with the optimal cluster size can achieve significant performance gain.
研究了一种具有多个发射天线和单个接收天线的OFDM信道的发射波束形成方法。利用信道信息,接收机为每个子载波选择并量化发射波束形成矢量。然后,量子化波束形成器通过速率受限的反馈信道中继到发射机。我们建议通过对相邻子载波集群应用公共发射波束形成器来减少所需的反馈比特数。所有子载波的总容量取决于簇大小、反馈位的数量和通道抽头的数量。导出了使和速率最大化的最优簇大小的近似值,并被证明可以很好地预测模拟结果。数值结果表明,以最优簇大小运行可以获得显著的性能增益。
{"title":"Subcarrier clustering for MISO-OFDM channels with quantized beamforming","authors":"Kritsada Mamat, W. Santipach","doi":"10.1109/ECTICON.2012.6254267","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254267","url":null,"abstract":"We consider a transmit beamforming for an OFDM channel with multiple transmit antennas and single receive antenna. With channel information, a receiver selects and quantizes transmit beamforming vector for each subcarrier. The quantized beamformers are then relayed to the transmitter via a rate-limited feedback channel. We propose to reduce the required number of feedback bits by applying a common transmit beamformer for a cluster of adjacent subcarriers. The sum capacity over all subcarriers depends on a cluster size, the number of feedback bits, and the number of channel taps. Approximation of the optimal cluster size that maximizes the sum rates is derived and is shown to predict simulation results very well. Numerical results show that operating with the optimal cluster size can achieve significant performance gain.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"17 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88627187","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}
引用次数: 3
High capacity frequency comb generated by a PANDA ring resonator 由PANDA环形谐振器产生的高容量频率梳
K. Luangxaysana, P. Phongsanam, S. Mitatha, M. Yoshida, N. Komine, P. Yupapin
This paper we propose a new system design for optical frequency comb generator (OFCG) using PANDA ring resonator over terahertz span. This scheme can be generated high capacity frequency comb signal tens to hundreds of frequencies by using a Dark-Bright soliton pulse driven, so that we can obtain high capacity comb signal at the through and drop port, respectively. Our system can tune the rate and pulse width by driving signal or the ring parameter. In application, the proposed scheme can be recognized as a simple flexible and more stable for apply in advance circuit system.
本文提出了一种利用PANDA环谐振器在太赫兹范围内实现梳状光发生器(OFCG)的系统设计。该方案利用暗-亮孤子脉冲驱动产生几十到几百个频率的高容量频梳信号,从而在通口和丢口分别获得高容量频梳信号。我们的系统可以通过驱动信号或环参数来调节速率和脉宽。在实际应用中,该方案简单、灵活、稳定,适用于超前电路系统。
{"title":"High capacity frequency comb generated by a PANDA ring resonator","authors":"K. Luangxaysana, P. Phongsanam, S. Mitatha, M. Yoshida, N. Komine, P. Yupapin","doi":"10.1109/ECTICON.2012.6254362","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254362","url":null,"abstract":"This paper we propose a new system design for optical frequency comb generator (OFCG) using PANDA ring resonator over terahertz span. This scheme can be generated high capacity frequency comb signal tens to hundreds of frequencies by using a Dark-Bright soliton pulse driven, so that we can obtain high capacity comb signal at the through and drop port, respectively. Our system can tune the rate and pulse width by driving signal or the ring parameter. In application, the proposed scheme can be recognized as a simple flexible and more stable for apply in advance circuit system.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90562658","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}
引用次数: 4
期刊
2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1