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2007 International Conference on Signal Processing, Communications and Networking最新文献

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A New Analytic Description of Short-Channel Effects in Fully Depleted Single Gate SOI MESFETs for Low Power VLSI Applications 低功耗VLSI应用中全耗尽单栅极SOI mesfet短通道效应的新解析描述
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350767
N. Balamurugan, K. Sankaranarayanan, M. Suguna, K. Balasubadra, Kalaivani
In this paper, the potential variation in the channel obtained from analytical solution of two-dimensional (2-D) Poisson's equation is used to calculate the drain induced barrier lowering (DIBL) and threshold voltage of SOI MESFETs with uniform doping profile. The two dimensional potential distribution in the active layer of SOI MESFET is approximated as a parabolic function with suitable boundary conditions to obtain the bottom potential at Si/oxide layer interface. The minimum bottom potential is used to monitor the DIBL effect. Further, the model for the bottom potential is extended to derive an analytical model for threshold voltage of SOI MESFET. This model can be used for low power VLSI applications
本文利用二维泊松方程解析解得到的沟道电位变化,计算了均匀掺杂的SOI mesfet的漏极诱导势垒降低(DIBL)和阈值电压。将SOI MESFET有源层的二维电位分布近似为具有合适边界条件的抛物线函数,可以得到Si/氧化物层界面处的底电位。最小底电位用于监测DIBL效应。进一步,对底电位模型进行了扩展,导出了SOI MESFET阈值电压的解析模型。该模型可用于低功耗VLSI应用
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引用次数: 0
ASIC Architecture for Implementing Blackman Windowing for Real Time Spectral Analysis 实现实时频谱分析Blackman窗口的ASIC体系结构
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350768
K. C. Ray, A. Dhar
Onus of this work is to propose a hardware efficient and flexible ASIC (application specific integrated circuit) architecture for Blackman windowing using CORDIC (co-ordinate rotation digital computer) as building block to minimize the spectral leakage and picket fence effect which are usual phenomena during spectral analysis by truncating input signals for finite length of FFT processor. A purely pipelined architecture has been adopted for the present design to ensure high throughput for real time applications with the latency equal to twice of the number of CORDIC stages plus two. The magnificence of this architecture is that window length can be changed by users for their specific applications and can be updated online for real time applications. The synthesized result of this 16 bit word size architecture with commercially available 0.18 mum CMOS technology using Synopsys Design Analyzer, shows that total estimated dynamic power to be 152 mW with an operating frequency of 125 MHz and total core area 8 mm2 (approx.)
本工作的重点是提出一种硬件高效、灵活的专用集成电路(ASIC)架构,以CORDIC(坐标旋转数字计算机)为基础,通过截断有限长度FFT处理器的输入信号,最大限度地减少频谱分析过程中常见的频谱泄漏和尖桩栅栏效应。本设计采用了纯流水线架构,以确保实时应用程序的高吞吐量,延迟等于CORDIC阶段数量的两倍加上2。这种架构的绝妙之处在于,用户可以根据自己的特定应用程序更改窗口长度,并且可以在线更新实时应用程序。采用Synopsys Design Analyzer的商用0.18 μ m CMOS技术的16位字长架构的综合结果显示,总估计动态功率为152 mW,工作频率为125 MHz,总核心区面积为8 mm2。
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引用次数: 6
A Novel and Fast Algorithm to Detect Moving Objects for Content Based Applications 一种基于内容的移动物体检测新算法
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350654
M. Dinesh Chandra, G. Kavitha
The new video coding standard MPEG-4 is enabling content-based functionalities as well as high coding efficiency considering shape information of moving objects. This paper presents a technique for detecting moving objects in a video. This technique consists of three stages-motion estimation, spatial segmentation and motion based region merging. Experimental results using traffic video sequence is presented to demonstrate the accuracy of our proposed algorithm
新的视频编码标准MPEG-4在考虑运动物体形状信息的情况下,实现了基于内容的功能和高编码效率。本文提出了一种检测视频中运动物体的技术。该技术包括三个阶段:运动估计、空间分割和基于运动的区域合并。用交通视频序列进行了实验,验证了算法的准确性
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引用次数: 0
An Efficient Time Domain Speech Compression Technique and Hardware Implementation on TMS320C5416 Digital Signal Processor 一种有效的时域语音压缩技术及其在TMS320C5416数字信号处理器上的硬件实现
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350674
A. Sanyal, S. Das, P. Venkateswaran, S. K. Sanyal, R. Nandi
Speech compression is of paramount importance in modern day communications where bandwidth conservation is necessary to accommodate the ever increasing number of communication channels. Historically, LPC (linear predictive coding) is used for speech analysis for better results, and subband coding is used in audio compression methods, such as MPEG standards. In this paper, we combine a RELP (residual excited linear prediction) technique with subband coding to yield compression rates of upto 85% with acceptable distortion levels
语音压缩在现代通信中具有至关重要的意义,在现代通信中,带宽保护是适应不断增加的通信信道数量所必需的。从历史上看,LPC(线性预测编码)用于语音分析以获得更好的结果,子带编码用于音频压缩方法,如MPEG标准。在本文中,我们将残留激发线性预测(RELP)技术与子带编码相结合,以产生高达85%的压缩率和可接受的失真水平
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引用次数: 0
B-Tree Based Trust Model for Resource Selection in Grid 基于b树的网格资源选择信任模型
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350735
P. Varalakshmi, S. Thamarai Selvi, A. Ashraf, K. Karthick
Trust management is an important issue in a grid environment where consumers and service providers are distributed geographically across autonomous administrative domains. In this paper, we propose reputation-based trust management architecture through the use of intermediaries, brokers. This architecture insists on multiple brokers in each domain. The entities (Consumers and the SPs) are distributed across these brokers, with each of these entities being associated with more than one broker. This improves the redundancy of information maintained at the broker sites, thereby improving the reliability. This also eases the network traffic at the broker sites while handling consumer requests and feedbacks. The issues rising out of such an arrangement of multiple brokers, namely the distribution of entities among the brokers and maintenance of consistency of information across the brokers, are addressed well in this paper. Trust-indices of SPs and consumers are evaluated and updated dynamically after the completion of each transaction. This enables the consumer to receive the response from the broker significantly quicker compared to other reputation-based-trust models where the trust-indices are computed at the request-time. To further improve the response time of each transaction, a B-tree indexing scheme has been proposed. Trust parameters such as satisfaction-value, number, cost and criticality of transactions, and different weights for past and recent transactions are considered for the trust evaluation. Our model shows a marked improvement in job success rate for various percentages of malicious entities. The selection query cost for each transaction is reduced thereby improving the overall response time is show-cased in this model. The impact of broker's feedback on the computation of trust-indices is also presented
在网格环境中,信任管理是一个重要问题,在网格环境中,消费者和服务提供者在地理上分布在自治管理域之间。在本文中,我们提出了基于信誉的信任管理架构,通过使用中介,经纪人。这种体系结构坚持在每个域中使用多个代理。实体(消费者和服务提供商)分布在这些代理中,其中每个实体都与多个代理相关联。这提高了在代理站点上维护的信息的冗余性,从而提高了可靠性。在处理消费者请求和反馈时,这也减轻了代理站点的网络流量。本文很好地解决了这种多个代理的安排所产生的问题,即代理之间的实体分布和跨代理的信息一致性维护。在每笔交易完成后,对服务提供商和消费者的信任指数进行动态评估和更新。与其他基于声誉的信任模型(在请求时计算信任索引)相比,这使得使用者能够更快地接收来自代理的响应。为了进一步提高每笔交易的响应时间,提出了一种b树索引方案。信任评估中考虑了交易的满意值、交易数量、交易成本和交易关键度等信任参数,以及过去和最近交易的不同权重。我们的模型显示,针对不同百分比的恶意实体,工作成功率有了显著提高。每个事务的选择查询成本降低了,从而提高了总体响应时间,如该模型所示。本文还讨论了经纪人反馈对信任指数计算的影响
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引用次数: 16
Technique for Minimizing Power Consumption in Array Multipliers through Input Vector Ordering 通过输入向量排序最小化阵列乘法器功耗的技术
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350723
N. Vasanthal, M. Satyam, K. Subba Rao
It is known that, excessive power dissipation can cause over heating, which reduces the life time of the chip and degrades the circuit performance. Local hot spots occur due to large instantaneous power dissipation. We propose a methodology based on reordering the input vectors to reduce the power dissipated in combinational circuits. Experimental results indicate that the proposed technique achieves reduction in average power, reduction in peak power and reduction in difference between maximum and minimum instantaneous power. In this paper, the results obtained by applying this technique to a specific circuit, an array multiplier are reported. As array multipliers are extensively used in digital signal processing (DSP) applications, we feel that this technique will have far-reaching implications in the design of low power processors
众所周知,过多的功耗会导致过热,从而降低芯片的使用寿命,降低电路的性能。瞬时功耗大,会产生局部热点。我们提出了一种基于输入向量重新排序的方法来降低组合电路中的功耗。实验结果表明,该方法可以降低平均功率,降低峰值功率,减小最大最小瞬时功率差。本文报道了将该技术应用于特定电路阵列乘法器的结果。由于阵列乘法器广泛应用于数字信号处理(DSP)应用,我们认为该技术将对低功耗处理器的设计产生深远的影响
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引用次数: 1
Selection of Mother Wavelet for Image Compression on Basis of Image 基于图像压缩的母小波选择
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350747
G. Kharate, Ashok A. Ghatol, P. Rege
Recently discrete wavelet transform and wavelet packet has emerged as popular techniques for image compression. This paper compares compression performance of Daubechies, Biorthogonal, Coiflets and other wavelets along with results for different frequency images. Based on the result, we propose that proper selection of mother wavelet on the basis of nature of images and improve the quality and compression ratio remarkably
近年来,离散小波变换和小波包已成为图像压缩的常用技术。本文比较了Daubechies、Biorthogonal、Coiflets等小波对不同频率图像的压缩效果。在此基础上,提出了根据图像的性质适当选择母小波的方法,可以显著提高图像的质量和压缩比
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引用次数: 22
Differentiated Bandwidth Allocation in Mobile Ad Hoc Networks (MANET) -A Profile Based Approach 移动自组网(MANET)中差异化带宽分配——基于配置文件的方法
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350692
R. Gunasekaran, V. Rhymend Uthariaraj
A major proliferating architecture, that extends its services globally in wireless networks, is ad hoc network, which endows more research areas to work with. In next generation networks, user can be accurately determined and maintained by the network on per-user basis. This paper investigates the design of ad hoc network architecture that exploits user profiles to maximize network efficiency and promote better quality of service by differentiated bandwidth reservation and resource allocation to different classes of users. A model called high-privileged and low-privileged architecture (HPLP) for the forthcoming ad hoc network is proposed through which differentiated services can be achieved for different class of users. A new MAC protocol named as D-MACAW, is also suggested for the proposed architecture. Among the various factors influencing the differentiated services, bandwidth reservation is only considered and different factors that can influence the efficiency of the bandwidth reservation are identified. Two classes of users are considered as high-privileged, a high-cost and efficient service users and low-privileged, low-cost and best effort service users. The differentiated service provided for the different classes of users is proved through simulation analysis. The results obtained using ns2 show that efficient quality of service is guaranteed to users who subscribe high-privileged profile
在无线网络中扩展其全球服务的一个主要的扩散架构是特设网络,它赋予了更多的研究领域。在下一代网络中,网络可以根据每个用户精确地确定和维护用户。本文研究了一种利用用户配置的自组织网络架构设计,通过对不同类型的用户进行差异化的带宽预留和资源分配,使网络效率最大化,提高服务质量。针对即将到来的自组织网络,提出了一种高特权和低特权架构(high-privileged and low-privileged architecture, HPLP)模型,通过该模型可以为不同类别的用户实现差异化的服务。本文还提出了一种新的MAC协议,称为D-MACAW。在影响差异化业务的各种因素中,只考虑带宽预留,识别影响带宽预留效率的各种因素。两类用户被认为是高特权、高成本和高效率的服务用户和低特权、低成本和尽最大努力的服务用户。通过仿真分析,验证了针对不同类别用户提供差异化服务的可行性。使用ns2的结果表明,对于订阅高特权配置文件的用户,有效的服务质量得到了保证
{"title":"Differentiated Bandwidth Allocation in Mobile Ad Hoc Networks (MANET) -A Profile Based Approach","authors":"R. Gunasekaran, V. Rhymend Uthariaraj","doi":"10.1109/ICSCN.2007.350692","DOIUrl":"https://doi.org/10.1109/ICSCN.2007.350692","url":null,"abstract":"A major proliferating architecture, that extends its services globally in wireless networks, is ad hoc network, which endows more research areas to work with. In next generation networks, user can be accurately determined and maintained by the network on per-user basis. This paper investigates the design of ad hoc network architecture that exploits user profiles to maximize network efficiency and promote better quality of service by differentiated bandwidth reservation and resource allocation to different classes of users. A model called high-privileged and low-privileged architecture (HPLP) for the forthcoming ad hoc network is proposed through which differentiated services can be achieved for different class of users. A new MAC protocol named as D-MACAW, is also suggested for the proposed architecture. Among the various factors influencing the differentiated services, bandwidth reservation is only considered and different factors that can influence the efficiency of the bandwidth reservation are identified. Two classes of users are considered as high-privileged, a high-cost and efficient service users and low-privileged, low-cost and best effort service users. The differentiated service provided for the different classes of users is proved through simulation analysis. The results obtained using ns2 show that efficient quality of service is guaranteed to users who subscribe high-privileged profile","PeriodicalId":257948,"journal":{"name":"2007 International Conference on Signal Processing, Communications and Networking","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123844205","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
Determination of Angle of Arrival using Nonlinear Support Vector Machine Regressors 用非线性支持向量机回归量确定到达角
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350652
N. Chithra Raj, P. Aswathy, K. V. Sagar
A combination of optimization theory, statistical learning, and kernel theory labeled as "support vector machines" (SVMs) can be applied to electromagnetic problems. Recently, popular machine learning algorithms have successfully been applied to wireless communication problems, notably spread spectrum receiver design, channel equalization, and adaptive beam forming with direction of arrival estimation (DOA). The capacity of communication systems has limitations due to co channel interference. In code division multiple access (CDMA), users can share the same frequency at the same time, but the number of users is limited by the multi-user interference (MUI). This paper presents an implementation of determination of angle of arrival (AOA) estimation based on nonlinear SVM regressors (SVR), an important component of CDMA communication systems
优化理论、统计学习和核理论的组合被称为“支持向量机”(svm),可以应用于电磁问题。最近,流行的机器学习算法已经成功地应用于无线通信问题,特别是扩频接收机设计,信道均衡和自适应波束形成与到达方向估计(DOA)。由于同信道干扰,通信系统的容量受到限制。在码分多址(CDMA)技术中,用户可以同时使用同一频率,但受多用户干扰(MUI)的限制,用户数量有限。作为CDMA通信系统的重要组成部分,本文提出了一种基于非线性支持向量机回归量(SVR)的到达角估计确定方法
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引用次数: 7
Optimization of Behavioral Modeling for Codesign of Embedded System 面向嵌入式系统协同设计的行为建模优化
Pub Date : 2007-11-05 DOI: 10.1109/ICSCN.2007.350773
M. Sangeetha, J. RajaPaul Perinbam
Behavioral modeling for codesign system is transformed into internal model known as control/data flow graph and produces a register-transfer-level (RTL) model of the hardware implementation for a given schedule. The internal model for codesign system is partitioned after scheduling and its communication cost is evaluated. The communication between components is through the buffered channels, the size of the buffer is estimated by its edge cut-set and system delay for different models are achieved to measure the quality of partitioning as opposed to general partitioning approaches that use number of nodes in each partition as constraint. In this paper scheduling and allocation algorithm (SAA) discusses helpful optimization method for resource-constrained and time constrained system in high level synthesis tool. The approach is based on data path for CDFG model that capture the design information from the source file specified by VHDL language from its equivalent separate Control flow graph and data flow graph. The proposed algorithm is also compared with other algorithm through estimation of schedules with a benchmark example. The buffer size is calculated with different objectives in partitioning and optimum partitioning is proposed
将协同设计系统的行为建模转换为内部模型,即控制/数据流图,并生成给定调度的硬件实现的寄存器-传输级(RTL)模型。对协同设计系统进行了调度后的内部模型划分,并对其通信成本进行了评估。组件之间的通信是通过缓冲通道进行的,缓冲区的大小由其边缘切割集估计,并且实现了不同模型的系统延迟来衡量分区的质量,而不是使用每个分区中的节点数量作为约束的一般分区方法。本文讨论了高级综合工具中资源约束和时间约束系统的调度与分配算法优化方法。该方法基于CDFG模型的数据路径,从其等效的独立控制流图和数据流图中捕获由VHDL语言指定的源文件中的设计信息。并通过调度估计与其他算法进行了比较。计算了不同分区目标下的缓冲区大小,提出了最优分区方案
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引用次数: 1
期刊
2007 International Conference on Signal Processing, Communications and Networking
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