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2017 Fourth International Conference on Signal Processing, Communication and Networking (ICSCN)最新文献

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Design and verification of LTSSM in USB 3.0 link layer using system verilog 基于系统verilog的USB 3.0链路层LTSSM设计与验证
M. Sukhanya, T. Kumar, K. Gavaskar
The proposed design includes the Link Training and Status State Machine (LTSSM). The LTSSM has both the upstream port and downstream port. The transition between all the 12 link states has been designed and verified. Complex scenarios are covered with multiple cover groups with many cover points. The RTL behavior of the LTSSM in Link Layer is verified using System Verilog and its verification is carried out in Mentor Graphics tool. The proposed verification environment includes the constrained randomization, functional coverage and code coverage. In the proposed system, DUT is subjected to the verification with various coverage metrics such as code coverage, functional coverage, etc. The functional coverage obtained 87.5 percentage by using cover groups.
提出的设计包括链路训练和状态状态机(LTSSM)。LTSSM同时具有上行端口和下行端口。设计并验证了所有12种链路状态之间的转换。复杂的场景由多个掩体组和许多掩体点覆盖。使用System Verilog对链路层LTSSM的RTL行为进行验证,并在Mentor Graphics工具中进行验证。所建议的验证环境包括约束随机化、功能覆盖和代码覆盖。在建议的系统中,DUT受到各种覆盖度量(如代码覆盖、功能覆盖等)的验证。利用覆盖组的功能覆盖率达到87.5%。
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引用次数: 1
Effect of relaxation stimuli on mental task performance 放松刺激对心理任务表现的影响
P. Vardhini, B. Geethanjali, Mahesh Veezhinathan
Mental Stress is the psychological condition experienced when an individual confronts a situation, where the demands are beyond one's capabilities. Over the years, researchers analysed many relaxation techniques by which stress levels could be reduced. In this work, an attempt has been made to analyse the effect of one of the relaxation stimuli (Alpha music) in the mental task performance. The participants are identified as Normal or Stressed based on the Stress scores in Depression, Anxiety and Stress Scales (DASS). The Stroop task is provided to the participants and the reaction times for congruent and incongruent stimuli were calculated. The task performance measures such as Omission and Commission errors in the mental task were analysed, before and after providing Alpha music. Fourteen participants were identified as normal participants and fourteen participants were identified as stressed participants using DASS. The reaction time was found to be significantly higher (p<0.05) for incongruent stimuli than for the congruent stimuli for both group of participants. The Omission and Commission errors significantly reduced (p<0.05) after the provision of relaxation stimuli. This finding suggests that under the influence of alpha music, reduction in the feelings of stress and increased sense of relaxation is observed.
精神压力是当个体面对超出自身能力的需求时所经历的心理状态。多年来,研究人员分析了许多可以降低压力水平的放松技巧。在这项工作中,我们试图分析其中一种放松刺激(阿尔法音乐)对心理任务表现的影响。根据抑郁,焦虑和压力量表(DASS)的压力得分,将参与者确定为正常或紧张。实验向被试提供Stroop任务,计算被试对一致刺激和不一致刺激的反应时间。在提供Alpha音乐之前和之后,对心理任务中的遗漏和委托错误等任务绩效指标进行了分析。14名参与者被确定为正常参与者,14名参与者被确定为压力参与者。两组被试对不一致刺激的反应时间显著高于对一致刺激的反应时间(p<0.05)。给予放松刺激后,遗漏和委托错误显著减少(p<0.05)。这一发现表明,在阿尔法音乐的影响下,人们的压力感会减少,放松感会增强。
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引用次数: 1
Comparison of tunability and phase noise associated with injection locked three staged single and differential ended VCOs in 90nm CMOS 90nm CMOS中注入锁定三阶段单端和差分端vco的可调性和相位噪声的比较
J. Johnson, Maran Ponnambalam, P. Chandramani
This work explores the injection locked single and differential ended ring VCO (Voltage Controlled Oscillator) suitable for a frequency synthesizer to operating over a wide range of frequencies with reduced phase noise. Along with design, the comparisons between 3 stage single ended and differential ended injection locked ring VCO topologies were studied. Single ended VCO was observed to have a tuning range of 1.2 to 3.6 GHz with phase noise of −110.2 dBc/Hz at 10 MHz offset and differential ended design have a tuning range of 1.5 to 3.1 GHz with phase noise of −109.9 dBc/Hz at 10 MHz offset. The injection locked VCOs were designed using 90 nm CMOS technology in ADS (Advance Design System).
本研究探索了适用于频率合成器的注入锁定单端和差分端环压控振荡器(VCO),该振荡器可在较宽的频率范围内工作,同时降低相位噪声。在设计过程中,对3级单端和差动端注入锁环VCO拓扑结构进行了比较研究。单端VCO的调谐范围为1.2至3.6 GHz,在10mhz偏移时相位噪声为- 110.2 dBc/Hz;差分端VCO的调谐范围为1.5至3.1 GHz,在10mhz偏移时相位噪声为- 109.9 dBc/Hz。在ADS (Advance Design System)中,采用90 nm CMOS技术设计了注入锁定vco。
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引用次数: 5
Efficient cooperative MIMO transmission clustering algorithm for wireless sensor networks 无线传感器网络高效协同MIMO传输聚类算法
M. Kanmani, M. Kannan, S. Devika
Wireless sensor network (WSN), a network of minute interconnected sensing element nodes communicating within themselves utilizing radio frequency signals and utilized in immensely enormous quantities to examine and realize the physical world. The communicating sensing element nodes are power-driven by batteries, which have a circumscribed lifetime. Hence managing the energy is a primary requisite for the design of WSN. In this paper, an efficient wireless sensor network utilizing a cooperative Multiple Input Multiple Output (MIMO) predicated on Space Time Trellis Code (STTC) is proposed. This STTC based cooperative MIMO technique is incorporated into Exclusive OR — Low Energy Adaptive Clustering Hierarchy (XOR-LEACH) protocol. For selection of cluster head, the last cluster head and a arbitrary binary vector are XORed together. The proposed system obtains amended performance and is compared with the existing LEACH protocol in terms of network lifespan and residual energy. This system performance in terms of Bit Error Rate (BER) has been analyzed for various detection techniques.
无线传感器网络(WSN)是一种由微小互连的传感元件节点组成的网络,它们利用射频信号相互通信,并大量用于检测和实现物理世界。通信传感元件节点由电池供电,电池寿命有限。因此,能量管理是无线传感器网络设计的首要条件。本文提出了一种基于空时格码(STTC)的多输入多输出(MIMO)协同无线传感器网络。这种基于STTC的协同MIMO技术被引入到排他性或低能量自适应聚类层次(XOR-LEACH)协议中。对于簇头的选择,最后一个簇头和任意一个二值向量一起xor。该系统获得了改进的性能,并在网络寿命和剩余能量方面与现有LEACH协议进行了比较。从误码率(BER)的角度分析了该系统在各种检测技术下的性能。
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引用次数: 1
Unimodality of MBType frame different metrics for efficient Key Frame Extraction in Video 基于MBType帧不同度量的单模性,实现视频中关键帧的高效提取
S. Vignesh, V. Vaidehi, M. Kannan
Key Frame Extraction (KFE) is an important block involved with any search process on large scale video logs. KFE has wide applications in fields like Content based retrieval systems, Video Summarization, compression and Video content management. The conventional algorithms exploit the pixel similarities or histogram distributions between frames of video, ignoring the key frame metric information in surveillance videos. The proposed Unimodality of MBType (UMB-KFE) method is motivated by the availability of frame difference metric information of Macro Blocks (I, P, B Frames) and ability to distribute them in a Unimodal distribution form. The difference metrics are further post processed with L2-norm upon the P-frames for efficient reduction. Real merit of the proposed system is that it does not need shot identification, segmentation or context information separation for KFE. Finally, experiments are performed by evaluating the proposed method upon benchmark video datasets and synthetic datasets. A comparison of the results obtained with ground truth information and with state-of-the-art techniques proves that the proposed method is at par in performance by extracting non-repetitive key frames.
关键帧提取(KFE)是大规模视频日志搜索过程中的一个重要环节。KFE在基于内容的检索系统、视频摘要、压缩和视频内容管理等领域有着广泛的应用。传统算法利用视频帧之间的像素相似性或直方图分布,忽略了监控视频中的关键帧度量信息。提出的MBType (mb - kfe)方法的单峰性是由于宏块(I, P, B帧)帧差度量信息的可用性以及它们以单峰分布形式分布的能力。差分指标在p帧上进一步进行l2范数后处理,以达到有效约简的目的。该系统的真正优点是不需要对KFE进行镜头识别、分割或上下文信息分离。最后,在基准视频数据集和合成数据集上进行了实验。与地面真实信息和最新技术获得的结果进行比较,证明所提出的方法在提取非重复关键帧的性能上是相同的。
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引用次数: 1
Performance analysis of SPIHT algorithm for biomedical image transmission 生物医学图像传输SPIHT算法的性能分析
B. Panjavamam, P. Bhuvaneswari
Recent advancements in health care services demand reliable transmission of medical images such as MRI and CT for better diagnosis and treatment. The effective utilization of available spectrum is one of the requirements for stable transmission medical information. The proposed research work aims to increase the effective use of available spectrum for image transmission over Long Term Evolution (LTE) networks. Image compression techniques reduce the volume of data by removing redundancies, thereby resulting in effective storage and transmission. In this work, the wavelet based SPIHT algorithm is employed to compress the medical images without compromising on the image quality. The quality parameters, namely Peak Signal to Noise Ratio (PSNR), Mean Squared Error (MSE) and Compression Ratio (CR) are calculated. The suitability of this algorithm for different types of medical images is analyzed with variable bit rates.
医疗保健服务的最新进展要求可靠地传输医学图像,如核磁共振成像和CT,以更好地诊断和治疗。有效利用可用频谱是稳定传输医疗信息的要求之一。提出的研究工作旨在提高在长期演进(LTE)网络上有效利用可用频谱进行图像传输。图像压缩技术通过消除冗余来减少数据量,从而实现有效的存储和传输。本文采用基于小波变换的SPIHT算法在不影响图像质量的前提下对医学图像进行压缩。计算质量参数,即峰值信噪比(PSNR)、均方误差(MSE)和压缩比(CR)。分析了该算法对不同类型的可变比特率医学图像的适用性。
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引用次数: 4
A sub-band based CAC scheme using adaptive codec switching for improved capacity and GoS of cognitive VoIP users 一种基于子带的CAC方案,采用自适应编解码交换,提高了认知VoIP用户的容量和GoS
Sudipta Dey, T. Chakraborty, I. S. Misra
Cognitive Radio Network (CRN) is one of the emerging technologies to improve the spectrum utilization where Secondary Users (SUs) opportunistically uses the spectrum without creating significant interference to Primary Users (PUs). However, in CRN channel characteristics varies widely due to the random arrival of PUs which leads to call dropping/call blocking. Excessive call dropping reduces the quality of VoIP communication for SU's. Quality of Service (QoS) can be improved by exclusive channel reservation for SUs which involves policy formation and cost implication. To avoid the complexity, we have used sub-banding concept for Call Admission Control (CAC) scheme and utilized the scheme for VoIP applications using Adaptive Codec Switching Policy. Test bed analysis is performed to evaluate the behavior of some well known high/low bit rate codecs in CRN. Overall system performance is evaluated by using two dimensional Markov Model. Analysis shows that there is significant improvement in system capacity as probability of dropping and probability of blocking reduces. Finally Grade of Service (GoS) is considered as overall system performance metric which shows nearly 39% improvement under high SU traffic condition.
认知无线网络(CRN)是一种提高频谱利用率的新兴技术,次要用户(su)可以在不对主用户(pu)产生明显干扰的情况下利用频谱。然而,在CRN中,由于pu的随机到达导致呼叫丢失/呼叫阻塞,信道特性变化很大。过多的掉线会降低SU的VoIP通信质量。服务质量(QoS)可以通过为SUs预留独占通道来提高,这涉及到策略的形成和成本的隐含。为了避免复杂性,我们在呼叫接纳控制(CAC)方案中使用了子带概念,并将该方案用于使用自适应编解码交换策略的VoIP应用。对CRN中一些知名的高/低比特率编解码器的性能进行了测试分析。利用二维马尔可夫模型对系统整体性能进行了评价。分析表明,随着跌落概率和阻塞概率的降低,系统容量显著提高。最后,服务等级(GoS)被认为是整体系统性能指标,在高SU流量条件下显示了近39%的改进。
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引用次数: 2
Ranking of hybrid algorithms for wavelet based denoising 基于小波去噪的混合算法排序
M. Abdurrahman, S. P. Kaarmukilan
Noise is an inevitable factor in an image. Several methods have been proposed to remove noise from an image. Of those wavelet transform based denoising is found to be remarkable since it works on different resolution levels. In this model different hybrid threshold have been proposed and experimented for Gaussian noise of different variance. These threshold algorithms are ranked based on their Signal to Noise Ratio(SNR) and Root Mean Square Error (RMSE) and the best threshold algorithm is suggested for denoising an image.
噪声是图像中不可避免的因素。已经提出了几种从图像中去除噪声的方法。其中,基于小波变换的去噪是显著的,因为它适用于不同的分辨率水平。在该模型中,对不同方差的高斯噪声提出了不同的混合阈值,并进行了实验。根据信噪比(SNR)和均方根误差(RMSE)对这些阈值算法进行了排名,并提出了用于图像去噪的最佳阈值算法。
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引用次数: 1
Multiple model filter based position tracking in CNC machines 基于多模型滤波的数控机床位置跟踪
H. Ramesh, S. Xavier, S. B. Kumar
A multiple model based Unscented Kalman Filter (MMUKF) approach for position tracking of CNC servo drives is presented in this paper. The motion controller in the CNC machine has to generate motion profile to drive servo motor based on the feed back from the Encoder. The output of the feed back is affected by measurement variations due to friction and non linear behavior of tool motion. The unscented kalman filter(UKF)gives better results in non-linear motion applications by deterministic sampling of sigma points. The MM algorithm gives good estimate by combining the individual estimates of parallel filters matched to different motion models of the CNC Tool. In this paper, an Unscented Kalman Filter is used inside the multiple model algorithm to improve the estimation accuracy of tool motion at different dynamic regions of motion profile. The motion profile of tool is simulated by including fixed velocity and turn model and the MM based UKF gives better results compared to traditional kalman filters.
提出了一种基于多模型的Unscented卡尔曼滤波(MMUKF)的数控伺服驱动器位置跟踪方法。数控机床中的运动控制器必须根据编码器的反馈生成运动轮廓来驱动伺服电机。反馈的输出受到由于摩擦和刀具运动的非线性行为引起的测量变化的影响。unscented卡尔曼滤波(UKF)通过对西格玛点的确定性采样,在非线性运动应用中获得了较好的结果。MM算法通过结合匹配不同运动模型的并行滤波器的单独估计,给出了较好的估计。本文在多模型算法中引入无气味卡尔曼滤波,提高了刀具在运动轮廓不同动态区域的运动估计精度。采用固定速度和转弯模型对刀具的运动轮廓进行了仿真,与传统的卡尔曼滤波相比,基于MM的UKF具有更好的效果。
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引用次数: 2
Survey on reconfigurable fir filter architecture 可重构fir滤波器结构研究综述
P. Dinesh, M. Manikandan
Finite impulse response (FIR) filters play a key role in most of the communication devices. Many methods have employed to improve the reconfigurability and to decrease its complexity. In this paper we will discuss in detail about three different reconfigurable FIR filter architectures. Although all those three FIR filter architectures are reconfigurable but each of them have different complexity based on the way processing elements are implemented. Each of them has its own merits and demerits compared with the other methods.
有限脉冲响应(FIR)滤波器在大多数通信设备中起着关键作用。为了提高系统的可重构性,降低系统的复杂性,已经采用了许多方法。在本文中,我们将详细讨论三种不同的可重构FIR滤波器架构。虽然这三种FIR滤波器体系结构都是可重构的,但根据处理元素的实现方式不同,它们的复杂度也不同。与其他方法相比,每种方法都有自己的优点和缺点。
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引用次数: 1
期刊
2017 Fourth International Conference on Signal Processing, Communication and Networking (ICSCN)
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