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2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT)最新文献

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Adept spectral filter for fading nonisotropic channel model 适合于衰落非各向同性信道模型的光谱滤波
Ashish Francis, Riboy Cheriyan
In this paper a novel efficient spectrum shaping filter for fading nonisotropic channel model is being proposed. Wireless communication system's evaluation is hampered due to time consuming, complex and inaccurate testing phase. The evaluation can be made proficient and dependable by creating channel environment for testing phase based on filter approach. During transmission of information through free space signal has to overcome fading and scattering effects. Channel environs has to be created by considering statistical properties and power spectra to replicate the nature of fading and scattering. Envelope shaping and spectrum filter can be realized for estimating channel effects. Envelope shaping filter can be modelled as IIR filter and spectrum filter as a multirate filter. In this paper a spectrum filter based on HDL is being proposed and ASIC results for 130nm standard library is considered.
提出了一种适用于衰落非各向同性信道模型的高效频谱整形滤波器。由于测试阶段耗时、复杂且不准确,阻碍了无线通信系统的评估。基于滤波方法建立测试阶段的通道环境,使评估更加熟练和可靠。在通过自由空间传输信息时,信号必须克服衰落和散射效应。信道环境必须通过考虑统计特性和功率谱来创建,以复制衰落和散射的性质。可以实现包络整形和频谱滤波来估计信道效应。包络整形滤波器可以建模为IIR滤波器,频谱滤波器可以建模为多速率滤波器。本文提出了一种基于HDL的频谱滤波器,并考虑了130nm标准库的ASIC结果。
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引用次数: 0
Turbo coded double differential phase shift keying in aeronautical channels 航空信道的涡轮编码双差分相移键控
C. Neeraja, S. Nandan
In this paper, we present the results of using a turbo decoder to retrieve a serially encoded data stream, which has been transmitted over an aeronautical channel. The transmitted data streams are Double Differential Phase Shift Keying (DDPSK) modulated signals, which are encoded using two rate one-half (1/2) recursive systematic convolutional (RSC) encoders, and then transmitted over the channel. The aeronautical channels are more affected by multipath fading and Doppler shift. The DDPSK modulation scheme is a differential modulation scheme and it can withstand Doppler shift [9]. Also the DDPSK modulation scheme does not require a carrier recovery circuit at the receiving end. The DDPSK can be extended to an nth order differential PSK, i.e. DnPSK. Results show that the performance of the DDPSK signal can be increased by using Turbo code in aeronautical channels.
在本文中,我们提出了使用涡轮解码器检索已在航空信道上传输的串行编码数据流的结果。传输的数据流是双差分相移键控(DDPSK)调制信号,使用两个速率二分之一(1/2)递归系统卷积(RSC)编码器进行编码,然后在信道上传输。航空信道受多径衰落和多普勒频移的影响较大。DDPSK调制方案是一种差分调制方案,可以承受多普勒频移[9]。此外,DDPSK调制方案不需要在接收端使用载波恢复电路。DDPSK可扩展为n阶微分PSK,即DnPSK。结果表明,在航空信道中使用Turbo码可以提高DDPSK信号的性能。
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引用次数: 0
Modified PSO based PID sliding mode control for inverted pendulum 基于改进粒子群的倒立摆PID滑模控制
Kirtiman Singh, S. Nema, P. Padhy
Trajectory tracking and stabilization of a nonlinear single stage inverted pendulum is a complicated control problem, as nonlinearity is present inherently and external factors affect the equilibrium position. Sliding mode control (SMC) is a robust control technique, most popular for nonlinear system's controlling. In this paper, a new model based robust control law, called PID (Proportional-Integral-Derivative) sliding mode control is designed using modified particle swarm intelligent optimization (MPSO) for second order nonlinear inverted pendulum plant. This paper throws light on the sliding surface design and highlights the important features of sliding mode, such as robustness and higher convergence, through extensive mathematical modelling. Siding mode control law is derived using Lyapunov stability approach and its asymptotic stability is proved mathematically and simulations shows its validity. MPSO PID-SMC control will stabilize the highly nonlinear Inverted Pendulum system, will compensate disturbance and uncertainty and reduces tracking error. Simulations and experimental application is done on the system and are presented to make a quantitative comparison with PID, traditional SMC and MPSO PID-SMC.
非线性单级倒立摆的轨迹跟踪与稳定是一个复杂的控制问题,既有内在的非线性,又有外部因素影响平衡位置。滑模控制(SMC)是一种鲁棒控制技术,在非线性系统的控制中应用最为广泛。针对二阶非线性倒立摆装置,采用改进粒子群智能优化(MPSO)方法,设计了一种新的基于模型的鲁棒控制律——比例-积分-导数(PID)滑模控制。本文通过广泛的数学建模,阐明了滑模的设计,突出了滑模的鲁棒性和高收敛性等重要特征。利用李雅普诺夫稳定性方法推导了赛丁模控制律,并用数学方法证明了其渐近稳定性,并通过仿真验证了其有效性。MPSO PID-SMC控制能够稳定高度非线性的倒立摆系统,补偿扰动和不确定性,减小跟踪误差。对该系统进行了仿真和实验应用,并与PID、传统SMC和MPSO PID-SMC进行了定量比较。
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引用次数: 16
Accelerating XML mining using graphic processors 使用图形处理器加速XML挖掘
S. Rathi, C. A. Dhote, Vivek Bangera
Mining of association rules is an important research direction of data mining. Extensive use of XML on web makes it an interesting source for data extraction from large data sets. There is a growing demand for modern tools and technologies which can efficiently handle such large data. This paper proposes a collaborative approach to extract association rules from structured XML data with the help of cost effective and energy efficient Graphic Processors. The serial approach comprises of deserialization using XPath followed by parallel sorting. In the parallel model there is parallel deserialization of XML data with the help of graphic processor followed by sorting the converted XML data with the help of in-built multithreaded structure of GPU. An empirical performance study on synthetic data is given, demonstrating a remarkable speed increase on a GPU as compared with fully optimized CPU implementation.
关联规则挖掘是数据挖掘的一个重要研究方向。XML在web上的广泛使用使其成为从大型数据集中提取数据的有趣来源。人们对现代工具和技术的需求日益增长,这些工具和技术可以有效地处理如此大的数据。本文提出了一种协作的方法,在高效节能的图形处理器的帮助下,从结构化XML数据中提取关联规则。串行方法包括使用XPath进行反序列化,然后进行并行排序。在并行模型中,首先利用图形处理器对XML数据进行并行反序列化,然后利用GPU内置的多线程结构对转换后的XML数据进行排序。对合成数据的性能进行了实证研究,表明与完全优化的CPU实现相比,GPU上的速度有了显着的提高。
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引用次数: 0
Efficient vertical handovers with QoS and failure management 具有QoS和故障管理的高效垂直移交
A. Christopher, M. K. Jeyakumar
Vertical handoff (VHO) is a crucial mechanism for the architecture of the Fourth Generation (4G) heterogeneous wireless networks (HWN), because the users of 4G-HWN are capable of switching to any network in a seamless manner. The 4G-HWN should assure a few of QoS related facilities such as offering high data rates, seamless mobility, strong RSS, congestion free environment and admission control. When accomplishment and requisite of a user is acknowledged the system gets succeed in handoff and seamless connectivity. This paper introduces four kinds of VHO algorithms for 4G-HWN. The proposed algorithms are not only focused for the voice call handover and their objectives are different from each other. The simulation results shows that the efficiency of the QoS parameters achieved by these algorithms.
垂直切换(VHO)是第四代(4G)异构无线网络(HWN)架构的关键机制,因为4G-HWN的用户能够以无缝的方式切换到任何网络。4G-HWN应保证一些与QoS相关的设施,如提供高数据速率、无缝移动性、强RSS、无拥塞环境和准入控制。当用户的完成和需求得到确认时,系统在切换和无缝连接方面取得了成功。本文介绍了4G-HWN的四种VHO算法。所提出的算法不仅关注语音呼叫切换,而且它们的目标也各不相同。仿真结果表明,这些算法所获得的QoS参数是有效的。
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引用次数: 1
An improved sparse code representation using local matching for deterministic face authentication 基于局部匹配的确定性人脸认证改进稀疏代码表示
Raji Kurikese, R. M. S. Kumar
The new framework proposed in this paper provides an insight into the problem of face authentication (verification) in unconstrained environment. This unconventional method extracts and represents the microstructures and local features of a given face image by greedy approach and sparse code respectively. This gives a stable and discriminative local descriptor for each patch that hinge on the local patches and learned dictionary. Dictionary is learned from the local patches of each facial patch (component) selected using greedy approach and optimality check. Compared to the previous sparse representation based methods, new method is actually a fusion of local component and region approach. The proposed method outperforms the existing method and gives an accuracy of 99% which is demonstrated through extensive experiments conducted on publically available and challenging LFW dataset.
本文提出的新框架对无约束环境下的人脸认证(验证)问题提供了深入的见解。该方法采用贪婪算法和稀疏编码分别对给定人脸图像的微观结构和局部特征进行提取和表示。这为每个补丁提供了一个稳定的判别局部描述符,该描述符依赖于局部补丁和学习字典。字典是通过贪婪方法和最优性检查,从每个面部补丁(组件)的局部补丁中学习到的。与以往基于稀疏表示的方法相比,新方法实际上是局部分量和区域方法的融合。该方法优于现有方法,准确率达到99%,并通过在公开可用和具有挑战性的LFW数据集上进行的大量实验证明了这一点。
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引用次数: 0
Bounding box based automatic segmentation of brain tumors using random walker and active contours from brain MRI 基于边界盒的脑MRI随机行走和活动轮廓自动分割脑肿瘤
P. S. Juhi, S. Sushanth Kumar
This paper reveals a computer aided system aimed at automatically segmenting brain tumors from MRI images is proposed, using bounding box-Active contour and Random walker algorithm. This method performs fast and accurate segmentation results by segmenting the most dissimilar regions of a tumor image. This paper overviews the benefits of automatic segmentation than the manual segmentation algorithms and we are proving that this algorithm is better than most of the segmentation.
本文提出了一种基于边界盒-主动轮廓和随机漫步器算法的脑肿瘤自动分割系统。该方法通过分割肿瘤图像中最不相似的区域来实现快速准确的分割结果。本文概述了自动分割算法相对于人工分割算法的优点,并证明了该算法优于大多数分割算法。
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引用次数: 3
GALS with CDMA based access scheduling for Wireless Internet of Things 基于CDMA的GALS无线物联网接入调度
M. Mohan, Sudhi Sudharman
Channel allocation and Channel access are considered to be the most important issues in Wireless Communication System. MAC protocols for wireless sensor networks based on CSMA/CA induce high overhead due to RTS/CTS packets and does not completely eliminate hidden terminal problems. A new technique, called Grid based Channel allocation and Access scheduling using Latin Squares (GAALS) can be effectively used for Channel allocation and Channel access. GAALS effectively increases the throughput and reduces end to end delay as well as jitter. Time division Multiple Access (TDMA) is used for both Channel allocation and Channel access in GAALS. In this paper, GAALS is modified to GALS, where grid based channel allocation using Latin Squares is done; but alternate techniques like Frequency Division Multiple Access (FDMA) and Code Division Multiple Access (CDMA) are considered for channel access and they are compared. Performance metrics which are used for comparison include throughput and delay. Simulation result shows that CDMA is a better channel access technique as compared to all the other techniques for channel access.
信道分配和信道接入是无线通信系统中最重要的问题。基于CSMA/CA的无线传感器网络的MAC协议由于RTS/CTS数据包的存在导致了较高的开销,并且不能完全消除终端隐藏问题。一种基于网格的信道分配和访问调度拉丁平方(GAALS)技术可以有效地用于信道分配和访问。GAALS有效地提高了吞吐量,减少了端到端延迟和抖动。时分多址(TDMA)用于GAALS中的信道分配和信道接入。本文将GAALS改进为GALS,利用Latin Squares实现基于网格的信道分配;但在信道接入方面考虑了频分多址(FDMA)和码分多址(CDMA)等替代技术,并对它们进行了比较。用于比较的性能指标包括吞吐量和延迟。仿真结果表明,与其他信道接入技术相比,CDMA是一种较好的信道接入技术。
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引用次数: 2
Era identification and recognition of Ganga and Hoysala phase Kannada stone inscriptions characters using advance recognition algorithm Ganga和Hoysala相卡纳达文石刻文字的时代识别与超前识别算法
H. Mohana, B. K. Rajithkumar
Kannada language has about 2000 year's history. Karnataka was ruled by many rulers like Kadambas, Western Ganga Dynasty, Rashtrakuta, Chalukya, Hoysala and Vijayanagara Empire. The inscriptions generally found are on stone or copper plates. The Kannada inscriptions found on historical hero Stone, coin and temple wall, pillar, tablet and rock edict. Analysis of any language with rich heritage and history is very important to understand the life and culture of that period. It is necessary to digitize Stone inscriptions by modern technique. Here in the present work, the images of stone inscription are captured from ordinary digital camera and images are pre-processed to remove noise. In this paper we presented a new approach called Advance Recognition algorithm (ARA) for recognition of characters and era identification of Kannada stone inscriptions belong Ganga and Hoysala period. Here in the present work, the alphabets of Ganga, Hoysala periods are stored in a Template. The character is identified by analyzing its shape and comparing its features that distinguish each character. Mean value and sum of absolute difference value analysis technique is implemented in matching the characters. Experimental results shows, it demonstrates relatively high accuracy in recognizing both stone inscriptions of Ganga and Hoysala period. Also it has demonstrated better time efficiency when compared to previous methods.
卡纳达语有大约2000年的历史。卡纳塔克邦由许多统治者统治,如Kadambas、西恒河王朝、Rashtrakuta、Chalukya、Hoysala和Vijayanagara帝国。碑文一般在石头或铜板上发现。在历史英雄石、钱币、寺庙墙、石柱、碑和石碑上发现的卡纳达文碑文。分析任何具有丰富遗产和历史的语言对于理解那个时期的生活和文化都是非常重要的。利用现代技术对石刻进行数字化处理是十分必要的。在本作品中,石刻的图像是从普通的数码相机上拍摄的,并对图像进行预处理去噪。本文提出了一种名为“超前识别算法”(ARA)的新方法,用于Ganga和Hoysala时期卡纳达文石刻碑文的文字识别和年代鉴定。在本作品中,恒河、霍萨拉时期的字母存储在模板中。通过分析汉字的形状和比较汉字的特征来识别汉字。采用绝对差值和均值分析技术进行特征匹配。实验结果表明,该方法对恒河时期和霍萨拉时期的石刻碑文都具有较高的识别准确率。与以往的方法相比,该方法具有更好的时间效率。
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引用次数: 2
Harmonic elimination in common arm three phase isolated H-Bridge multi level inverter 共臂三相隔离h桥多电平逆变器的谐波消除
Raja Basak, Paruchuri Nishita, Zaid Elias, S. Sreejith
Any system designed aims in achieving a maximized output with least resources and hence the efficiency. As known the traditional cascaded multilevel inverter consists of many number of dc sources. With the increase in switching frequency and levels of the inverter the switching losses increase. Thus this project aims in reducing the number of DC sources and also the switches that are used for the process of generation of a five level output from that of a traditional isolated cascaded multilevel inverter using the concept of common arm.This deals with an evolutionary algorithm based technique to eliminate the harmonics on a common arm three phase transformer multilevel inverter. This approach utilizes genetic algorithm as the optimization technique. In this inverter topology, the number of switches and transformers are reduced. The harmonics generated by the switching of the inverters is eliminated by GA algorithm. A comparison on the Total Harmonic Distortion (THD) between the proposed topology and the existing one is also carried out.
任何系统的设计目标都是用最少的资源获得最大的产出,从而提高效率。众所周知,传统的级联多电平逆变器由许多直流电源组成。随着逆变器开关频率和电平的增加,开关损耗也随之增加。因此,该项目旨在减少直流电源的数量,以及使用公共臂概念从传统隔离级联多电平逆变器产生五电平输出的过程中使用的开关。研究了一种基于进化算法的共臂三相变压器多电平逆变器谐波消除技术。该方法利用遗传算法作为优化技术。在这种逆变器拓扑中,减少了开关和变压器的数量。采用遗传算法消除逆变器开关产生的谐波。对所提出的拓扑与现有拓扑的总谐波失真(THD)进行了比较。
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引用次数: 3
期刊
2014 International Conference on Control, Instrumentation, Communication and Computational Technologies (ICCICCT)
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