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2016 18th International Conference on Advanced Communication Technology (ICACT)最新文献

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Experimental validation of multipoint joint processing of range measurements via software-defined radio testbed 软件无线电试验台多点联合处理距离测量的实验验证
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423356
G. Mashkov, E. Borisov, G. Fokin
In this paper we present an algorithm for multipoint joint processing of range measurements with trial results accumulation, evaluate its accuracy analytically in terms of range mean square error and finally validate it through an experiment. The methods used for analytical evaluation is matrix analysis and nonlinear least squares estimation theory. The approach for experimental validation is a software-defined radio (SDR) transceiver working on National Instruments (NI) Universal Software Radio Peripheral (USRP) hardware with LabVIEW software, performing transmission, reception and processing of signals. Presented solution was validated in static scenario and achieved position errors of several meters depending on the number of range measurement trials. The resulting error was substantially affected by synchronization uncertainty due to network organization of transceiver stations and measurement processing unit. However, in the conclusion we can state that joint processing of range measurements with trial results accumulation can substantially improve positioning accuracy and it was experimentally validated with software-defined radio testbed.
本文提出了一种基于试验结果积累的多点联合处理距离测量数据的算法,并从距离均方误差的角度对其精度进行了分析评价,最后通过实验对算法进行了验证。分析评价的方法是矩阵分析和非线性最小二乘估计理论。实验验证的方法是一个软件定义无线电(SDR)收发器,工作在美国国家仪器公司(NI)通用软件无线电外设(USRP)硬件上,使用LabVIEW软件,执行信号的发送、接收和处理。该方案在静态场景下进行了验证,根据距离测量试验次数的不同,得到了数米的位置误差。由于收发站的网络组织和测量处理单元的同步不确定度对测量结果的误差有很大影响。然而,在结论中我们可以指出,距离测量与试验结果积累的联合处理可以显着提高定位精度,并通过软件定义无线电试验台进行了实验验证。
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引用次数: 13
A flexible FPGA-to-FPGA communication system 灵活的FPGA-to-FPGA通信系统
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423482
Wu An, Xi Jin, Xueliang Du, Shuaizhi Guo
In high-performance computing systems, each computing node communicates via a high-speed serial bus to ensure sufficient data transfer bandwidth. However, each computing node of different bus protocols is very difficult to communicate directly, which is not conducive to the extensibility of HPC (High performance computing) clusters. In this paper, we propose UPI, a inter-node communication interface based on FPGA, which can transmit different bus protocols (PCIe protocol and Ethernet protocol) simultaneously. More importantly, many different bus-supported computing nodes can be connected to the same HPC system. We implemented our UPI system on "Gemini" prototype verification board with two Xilinx Virtex-6 FPGAs. The results show that the transmission speed of the UPI can reach 11.04Gpbs (PCIe Gen2 X4) and 4.32Gpbs (Gigabit Ethernet) when DMA payload sizes is greater than 260KB and 80KB, respectively.
在高性能计算系统中,每个计算节点通过高速串行总线进行通信,以保证有足够的数据传输带宽。然而,不同总线协议的计算节点之间的直接通信非常困难,不利于高性能计算集群的可扩展性。本文提出了一种基于FPGA的节点间通信接口UPI,它可以同时传输不同的总线协议(PCIe协议和以太网协议)。更重要的是,许多不同的总线支持的计算节点可以连接到同一个HPC系统。我们在使用两个Xilinx Virtex-6 fpga的“Gemini”原型验证板上实现了UPI系统。结果表明,当DMA有效载荷大小大于260KB和80KB时,UPI的传输速度分别达到11.04Gpbs (PCIe Gen2 X4)和4.32Gpbs(千兆以太网)。
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引用次数: 8
A design and implementation of 32-paths parallel 256-point FFT/IFFT for optical OFDM systems 光学OFDM系统32路并行256点FFT/IFFT的设计与实现
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423414
Hun-sik Kang, S. Chang, In-Ki Hwang, J. Lee
This paper presents the design and implementation of thirty-two paths parallel FFT/IFFT for optical OFDM systems. Employing OFDM over high speed optical transmission systems requires large hardware resources due to computational-intensive operations such as full-parallel FFT implementation. The proposed 256-point FFT/IFFT adopts 32-paths parallel architecture with mixed radix-23 and radix-25 algorithm to reduce large number of complex multipliers. With this architecture, 256 full parallel data signals can be divided into eight sequential groups. Each group, composed of 32 parallel signals, is pipeline-processed. As a result, the hardware resources for full parallel 256-point FFT operation can be reduced to as much as those of 32-point FFT resource plus 32-path 8-point single-path delay feedback (SDF). The proposed FFT architecture is implemented with field programmable gate array and integrated in 12 Gbps, 64-QAM encoded real-time optical OFDM system. The implementation result shows that an 86% complex multiplier reduction can be achieved in comparison with full parallel architecture. The attained error vector magnitude (EVM) is approximately up to -32 dB for 64-QAM OFDM signals.
本文介绍了用于光OFDM系统的32路并行FFT/IFFT的设计与实现。在高速光传输系统中采用OFDM需要大量的硬件资源,因为计算密集型的操作,如全并行FFT的实现。所提出的256点FFT/IFFT采用32路并行架构,采用基数23和基数25混合算法,减少了大量的复数乘法器。在这种架构下,256个全并行数据信号可以被分成8个顺序组。每组由32个并行信号组成,采用流水线处理。因此,完全并行256点FFT操作的硬件资源可以减少到32点FFT资源加上32路8点单路延迟反馈(SDF)的硬件资源。所提出的FFT架构采用现场可编程门阵列实现,并集成在12gbps 64-QAM编码的实时光OFDM系统中。实现结果表明,与全并行架构相比,该架构可将复杂乘法器降低86%。对于64-QAM OFDM信号,获得的误差矢量幅度(EVM)大约高达-32 dB。
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引用次数: 4
A gateway based fog computing architecture for wireless sensors and actuator networks 一种基于网关的无线传感器和执行器网络雾计算架构
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423332
Wan-Seop Lee, Ki-dong Nam, Hak-Gyun Roh, Sang-Ha Kim
The technologies of Internet of Things have been wide used in many areas such as intelligent building, logistics, security, and health. One of the key elements of the Internet of Things is Wireless Sensors and Actuators Networks(WSANs). Fog computing, the new concept of the cloud at the edge of the network, is considered the appropriate platform for many Internet of Things services and applications. In this paper we present a gateway based fog computing architecture for WSANs and argue that the key requirements of this architecture. This architecture mainly consists of master nodes and slave nodes, and manages virtual gateway functions, flows, and resources.
物联网技术已广泛应用于智能建筑、物流、安防、健康等诸多领域。物联网的关键要素之一是无线传感器和执行器网络(wsan)。雾计算是网络边缘云的新概念,被认为是许多物联网服务和应用的合适平台。本文提出了一种基于网关的无线局域网雾计算体系结构,并讨论了该体系结构的关键要求。该架构主要由主节点和从节点组成,对虚拟网关的功能、流程和资源进行管理。
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引用次数: 70
Gathering user reviews for an opinion dictionary 为意见词典收集用户评论
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423474
Jun Kikuchi, V. Klyuev
Nowadays, people purchase a lot of products from online shopping sites. To support customers in decision making, some sites collect and provide user reviews on products. However, contents of the user reviews are too abundant for customers to analyze them in a short period of time. The automatic analysis of reviews is important to provide users with valuable information about goods of any category. The objective of this research is to improve the usefulness of reviews for consumers. This research focuses on an opinion dictionary as a collection of specific keywords and key phrases. This opinion dictionary models a standardized better review to extract patterns of trustworthy reviews. In this study, a simple corpus of three different categories of goods is composed. It consists of noun and adjective keywords. This research is successful to obtain essential features and relations among three different categories in the opinion dictionary. Moreover, this opinion dictionary will be applied to supervised learning methods, such as a support vector machine to create a review evaluation system. The findings from this study can contribute to assist users' decisions to evaluate reliable and useful reviews.
现在,人们从网上购物网站购买很多产品。为了帮助客户做出决策,一些网站收集并提供用户对产品的评论。但是,用户评论的内容过于丰富,客户无法在短时间内进行分析。评论的自动分析对于为用户提供有关任何类别商品的有价值信息非常重要。本研究的目的是提高评论对消费者的有用性。本研究的重点是一个意见词典作为一个特定的关键字和关键短语的集合。该意见词典为标准化的更好的评论建模,以提取值得信赖的评论模式。在本研究中,一个简单的语料库由三个不同类别的商品组成。它由名词和形容词关键词组成。本研究成功地获得了意见词典中三个不同类别之间的本质特征和关系。此外,该意见词典将应用于监督学习方法,如支持向量机来创建复习评价系统。本研究的结果有助于帮助用户决定评估可靠和有用的评论。
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引用次数: 8
Iterative receiver algorithm for millimeter wave mobile hotspot network system 毫米波移动热点网络系统的迭代接收机算法
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423407
Dae-Soon Cho, Il-Kyu Kim
The need of high speed data rate services at mobile group vehicles moving at high speed has been on the increase. ETRI (Electronics and Telecommunications Research Institute) has been designing and developing a new moving wireless backhaul system, Mobile Hotspot Network (MHN) system, which can support over 1Gbps data rate services for mobile group vehicles running at high speed up to 500km/h such as KTX (Korea Train Express) express train. In this paper, the methods to adopt the iterative receiver algorithm are introduced to improve MHN system performance. One of the main characteristics of MHN system is to apply multi-flow structure, which may cause interferences between two data stream, therefore, this can degrade system performance. However, due to multi-flow characteristic, we can apply the iterative receiver algorithm. In this paper, we showed the possibility to improve system performance by applying iterative receiver algorithm. Currently, we have developed the MHN test-bed system and had a goal to demonstrate the real time performance of the MHN system in the outdoor environment by Feb., 2016. Outdoor demonstration will be shown at line 8 subway in Seoul, Korea.
高速移动的移动群组车辆对高速数据速率服务的需求一直在增加。ETRI(电子通信研究院)正在设计开发一种新的移动无线回程系统——移动热点网络(MHN)系统。该系统可以为KTX(韩国高速列车)等时速500公里的高速行驶的移动群组车辆提供1Gbps以上的数据速率服务。本文介绍了采用迭代接收机算法提高MHN系统性能的方法。MHN系统的主要特点之一是采用多流结构,这可能导致两个数据流之间产生干扰,从而降低系统性能。然而,由于多流特性,我们可以采用迭代接收算法。在本文中,我们展示了应用迭代接收机算法来提高系统性能的可能性。目前,我们已经开发了MHN试验台系统,目标是在2016年2月之前演示MHN系统在室外环境中的实时性能。将在首尔地铁8号线进行室外示范。
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引用次数: 0
An efficient detection method for unknown wireless devices using SDR receivers 一种利用SDR接收机对未知无线设备进行有效检测的方法
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423268
Hong-soon Nam, D. Kim, Jong Won Park
In this paper, we describe an efficient detection method for unknown wireless devices using software defined radio (SDR) receivers, which is to estimate the position of unknown devices and their transmission power by sensing carrier frequency and measuring the received signal strengths (RSSs). RSS based positioning techniques are attractive for their low implementation complexity, but they are very sensitive to the path loss exponent in field environment. Most RSS based techniques calculate the position and transmission power of unknown devices assuming that the value of the path loss exponent is known before. However, the position estimation accuracy largely depends on the discrepancy of the path loss exponent. To improve the accuracy, the proposed method introduces a new process for the path loss exponent estimation when calculating the position and transmission power of unknown devices. The simulation results show that the proposed method has better position estimation accuracy compared with existing ones.
本文描述了一种利用软件定义无线电(SDR)接收机对未知无线设备的有效检测方法,即通过感知载波频率和测量接收到的信号强度(RSSs)来估计未知设备的位置和发射功率。基于RSS的定位技术具有实现复杂度低的优点,但在野外环境中对路径损失指数非常敏感。大多数基于RSS的技术在计算未知器件的位置和发射功率时,都假定路径损耗指数的值是已知的。然而,位置估计的精度很大程度上取决于路径损失指数的差异。为了提高精度,该方法在计算未知器件的位置和发射功率时引入了新的路径损耗指数估计过程。仿真结果表明,与现有的位置估计方法相比,该方法具有更好的位置估计精度。
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引用次数: 1
Table based KNN for index optimization 用于索引优化的基于表的KNN
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423525
T. Jo
We concern this research with the table based KNN as the approach to the index optimization task. It may be interpreted into an instance of word classification, and the encoding scheme where words are encoded into tables improved the task word classification. In this research, words are encoded into tables and apply the table based KNN to the index optimization task. From this research, we expect the better and more stable performance than the traditional version, in this task. Therefore, this research is intended to provide the improved index optimization scheme.
我们将基于表的KNN作为索引优化任务的方法。它可以被解释为单词分类的实例,并且将单词编码到表中的编码方案改进了任务单词分类。在本研究中,将单词编码到表中,并将基于表的KNN应用于索引优化任务。通过本次研究,我们期望在本次任务中,能有比传统版本更好、更稳定的性能。因此,本研究旨在提供改进的索引优化方案。
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引用次数: 2
Sounding reference signal measurement in LTE system LTE系统中测深基准信号的测量
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423547
Eunjeong Shin, Jeawook Shin
The SRS are physical signals transmitted in uplink to enable the eNB to estimate the CSI over a range of frequencies in LTE system. The estimation of the CSI assists the eNB scheduler to properly allocated radio resource to the UE. The SRS transmission can be also be used to support downlink beamforming. The sub-frame in which SRS is transmitted by any UE within the cell is signaled via cell specific broadcast signaling, there are 15 possible sets of subframe in which SRS may be transmitted within each radio frame. The SRS is based on the extended zadoff-chu sequence and transmitted in the last SC-FDMA symbol of an uplink subframe, the SRS transmitted by the UEs are multiplexed in the time and freq. domain through configuring SRS periodicity SRS, frequency comb pattern, and SRS bandwidth. Different sets of UE-specific sounding signals are independently allocated for SRS transmission, including transmission bandwidth, frequency comb pattern, cyclic shift. In this paper, transmission subframe, bandwidth, freq. comb pattern, for it suggests ways to reduce the measurement performance and HW complexity of the UE between the Sounding RS separated by a Cyclic shift value and Timing offset measurement method.
SRS是在上行链路中传输的物理信号,使eNB能够在LTE系统的频率范围内估计CSI。对CSI的估计有助于eNB调度器将无线电资源适当地分配给终端。SRS传输也可用于支持下行波束形成。由小区内的任何UE传输SRS的子帧通过小区特定的广播信令发出信号,在每个无线电帧内可以传输SRS的15个可能的子帧集。SRS基于扩展的zadoff-chu序列,在上行子帧的最后一个SC-FDMA码元上传输,通过配置SRS周期、频率梳型和SRS带宽,实现SRS在时频域的复用。不同组的ue专用探测信号独立分配用于SRS传输,包括传输带宽、频梳方向图、周期移位。本文从传输子帧、带宽、频梳模式等方面,提出了降低循环移位测量法和时序偏移测量法分离的探测RS之间UE的测量性能和HW复杂度的方法。
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引用次数: 0
A design of alias naming scheme for namespace in named data networking 命名数据网络中命名空间的别名命名方案设计
Pub Date : 2016-03-03 DOI: 10.1109/ICACT.2016.7423462
Euihyun Jung
Named Data Networking (NDN) has been considered as a promising networking technology that makes up for the limitation of current IP networking. However, due to its early stage, there are still a lot of open issues in NDN research. From the issues, the limitation of changing namespace keeps an application from modifying its namespace or adding additional namespace after once the namespace was fixed. In NDN, since the namespace of an application is tightly coupled with the routing paths of the application, this limitation is not easy to avoid. In order to resolve the issue, we suggest an alias naming scheme that enables several namespaces to coexist for the same application on NDN network. The evaluation showed the proposed scheme worked well as intended.
命名数据网络(NDN)被认为是一种很有前途的网络技术,它弥补了当前IP网络的局限性。然而,由于NDN的研究处于早期阶段,目前仍有许多未解决的问题。从问题来看,更改名称空间的限制使应用程序无法在名称空间固定之后修改其名称空间或添加其他名称空间。在NDN中,由于应用程序的名称空间与应用程序的路由路径紧密耦合,因此不容易避免这种限制。为了解决这个问题,我们建议采用别名命名方案,使同一应用程序在NDN网络上可以同时使用多个命名空间。评价表明所提议的方案按预期效果良好。
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引用次数: 2
期刊
2016 18th International Conference on Advanced Communication Technology (ICACT)
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