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2017 International Conference on Communication, Computing and Digital Systems (C-CODE)最新文献

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High SNR analysis of inter-body interference in Body Area Networks 体域网络中体间干扰的高信噪比分析
Furqan Jameel, Faisal, M. Haider, A. A. Butt
Wireless Body Area Networks (BANs) have drawn significant attention of research community all over the world due to their applications in healthcare. This paper adopts the cluster based approach to analytically model the implications of inter-body interference in BANs. To be specific, we derive exact closed-form expression for outage probability for co-channel interference under Rayleigh and Rician fading. We consider two cases, where in first case channel between sensors and cluster head is Rice distributed and channel between main and interfering cluster head is Rayleigh distributed. In second case, channel between sensors and cluster head is Rayleigh distributed and channel between main and interfering cluster head is Rice distributed. We also evaluate the significance of Rician-K factor for both cases. Extensive simulations are performed to validate our findings which clearly show the effect of inter-body interference on the performance of BANs.
无线体域网络(ban)由于在医疗保健领域的广泛应用,引起了世界各国研究界的广泛关注。本文采用基于聚类的方法对ban中体间干扰的影响进行了分析建模。具体地说,我们导出了瑞利衰落和瑞利衰落下同信道干扰中断概率的精确封闭表达式。我们考虑了两种情况,第一种情况下,传感器和簇头之间的信道是赖斯分布的,主簇头和干扰簇头之间的信道是瑞利分布的。在第二种情况下,传感器与簇头之间的信道为瑞利分布,主簇头与干扰簇头之间的信道为赖斯分布。我们还评估了两种情况下的Rician-K因子的显著性。我们进行了大量的模拟来验证我们的发现,这些发现清楚地显示了体间干扰对ban性能的影响。
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引用次数: 3
Performance analysis of VANETs under Rayleigh, Rician, Nakagami-m and Weibull fading Rayleigh、expert、Nakagami-m和Weibull衰落下VANETs的性能分析
Furqan Jameel, Faisal, M. Haider, A. A. Butt
Vehicular Ad-hoc Networks (VANETs) are considered as one of the promising technologies for reduction of accidents and provisioning of infotainment services on the road. Due to high mobility of vehicles, wireless channel response rapidly changes from time to time which results into random fading. Therefore, this paper provides in depth analysis of performance of VANETs under different fading channels. To be specific, we adopt the cluster based approach to analytically model VANETs. Closed-form expressions of packet loss probability for different fading (i.e. Rayleigh, Rician, Nakagami-m and Weibull channel) models have been provided considering both MAC and Physical Layer characteristics. The derived expressions also encompass the effect of decoding failure and packet collision based on signal to noise ratio (SNR) and back-off timer, respectively. Our results characterizes the impact of channel conditions, vehicle speed, and contention window on the performance of the cluster based VANETs. Extensive simulations are performed to verify our findings.
车辆自组织网络(VANETs)被认为是减少交通事故和提供信息娱乐服务的有前途的技术之一。由于车辆的高移动性,无线信道响应随时间变化很快,导致随机衰落。因此,本文对vanet在不同衰落信道下的性能进行了深入分析。具体而言,我们采用基于聚类的方法对vanet进行分析建模。在考虑MAC和物理层特性的情况下,给出了不同衰落模型(即Rayleigh、ician、Nakagami-m和Weibull信道)丢包概率的封闭表达式。推导出的表达式还分别包含了基于信噪比(SNR)和后退定时器的解码失败和包碰撞的影响。我们的结果表征了通道条件、车辆速度和争用窗口对基于集群的vanet性能的影响。进行了大量的模拟来验证我们的发现。
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引用次数: 21
Selection of EEG channels based on Spatial filter weights 基于空间滤波权值的脑电信号通道选择
Naveen Masood, Humera Farooq, Irfan Mustafa
Most of the Electroencephalography (EEG) based brain computer interfaces (BCIs) use large number of channels to capture the signals from subject's brain. This is one of the major issues in commercial and out of the lab usage of such systems. Common Spatial Pattern (CSP) algorithms are widely used for feature extraction in BCI systems for motor imagery. As the EEG signals have noise and overfitting issues, various regularized CSP algorithms are introduced to overcome these factors. In this work, a method is introduced to find the variant of CSP that achieves maximum classification accuracy with least number of EEG channels. The approach is based on firstly identify the spatial filter weights using complete set of channels. In the next step, the channels are selected based on the maximal filter weights. Channels with highest values are included to find the accuracy in next run and ultimately the optimum combination of number of channels, CSP variant and classification accuracy are reported. Multichannel data comprised of 60 electrodes from BCI Competition III dataset IIIa from three subjects who performed left hand, right hand, foot and tongue MI is considered for this purpose. For the data analyzed in this study, it is found that instead of using data from 60 electrodes only six can be used without significantly compromising the classification accuracy.
大多数基于脑电图(EEG)的脑机接口(bci)使用大量的通道来捕获来自受试者大脑的信号。这是此类系统在商业和实验室外使用中的主要问题之一。公共空间模式(CSP)算法被广泛应用于脑机接口系统中运动图像的特征提取。针对脑电信号存在噪声和过拟合问题,引入了各种正则化CSP算法来克服这些因素。本文提出了一种以最少脑电信号通道数获得最大分类精度的CSP变体的方法。该方法首先利用完整的信道集识别空间滤波器权值。在下一步中,根据最大滤波器权重选择通道。将值最高的信道加入到下次运行中寻找准确率,最终报告信道数、CSP变量和分类准确率的最佳组合。多通道数据由来自脑机接口大赛III数据集IIIa的60个电极组成,这些电极来自三名受试者,他们分别进行了左手、右手、脚和舌头的脑机接口。对于本研究中分析的数据,我们发现,在不显著影响分类精度的情况下,只使用6个电极的数据而不是使用60个电极的数据。
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引用次数: 9
Development of a low cost wireless IMU using MEMS sensors for pedestrian navigation 基于MEMS传感器的低成本无线IMU行人导航系统的开发
Naeem Mumtaz, Sana Arif, Nimra Qadeer, Z. Khan
This paper describes the design and development of a low cost Bluetooth based wireless inertial measurement unit (WIMU) for pedestrian navigation applications (PNS). Our aim is to use commercially available micro electromechanical system (MEMS) based inertial sensors to develop a miniature WIMU for GPS denied navigation applications including PNS. The challenging issues with noisy MEMS sensors and their integration to obtain attitude information is handled carefully by using sensor fusion algorithm while ensuring as minimum delay as possible for real time decision. The results have been compared with the sensor suite available in the Samsung Galaxy s5 smart phone and found to accurately following the trends in roll, pitch, yaw angles as well as x-y-z accelerations.
本文介绍了一种基于蓝牙的低成本行人导航无线惯性测量单元(WIMU)的设计与开发。我们的目标是使用商用微机电系统(MEMS)为基础的惯性传感器开发一个微型WIMU,用于GPS拒绝导航应用,包括PNS。采用传感器融合算法,在确保实时决策的最小延迟的同时,仔细处理了噪声MEMS传感器及其集成获取姿态信息的挑战性问题。结果与三星Galaxy s5智能手机的传感器套件进行了比较,发现可以准确地跟踪滚转、俯仰、偏航角以及x-y-z加速度的趋势。
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引用次数: 3
Enhancing the Nobel Prize schema 加强诺贝尔奖机制
Raabia Asif, M. A. Qadir
This paper describes the Nobel Prize schema available on the Nobel Prize official website. The Noble Prize schema only caters major facts regarding the prize data, a lot of details about the prize are still unstructured and stored in the form of html files. This research identifies some shortcomings in the schema and proposes additions in the schema to cater some of the html files.
本文描述了诺贝尔奖官方网站提供的诺贝尔奖模式。诺贝尔奖模式只处理与奖项数据有关的主要事实,关于奖项的许多细节仍然是非结构化的,并以html文件的形式存储。这项研究发现了模式中的一些缺点,并提出了在模式中添加一些内容以满足某些html文件的需求。
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引用次数: 3
Interference reduction in Cognitive radio networks using Genetic and Firefly Algorithms 利用遗传和萤火虫算法减少认知无线电网络的干扰
A. Elahi, I. Qureshi, Mehreen Atif, N. Gul
Cognitive radio (CR) is the novel technology in wireless communication, which has an ability to use the vacant spectrum of primary user smartly. Non Contiguous orthogonal frequency division multiplexing (NCOFDM), a multicarrier system is considered as the appropriate candidate for CR physical layer, but due to its high sidelobes it suffers from high out of band (OOB) radiation, that can affect its spectrum sharing capability. In this paper, we proposed two search algorithms: Genetic Algorithm (GA) and Firefly algorithm (FFA) for estimating the amplitudes of the Cancellation subcarriers (CCs). These CCs are inserted on either side of the used NCOFDM signal to cancel the sidelobes. Simulation results show that better sidelobe reduction is achieved by the proposed algorithms as compared to the existing techniques in the literature.
认知无线电(CR)是一种新兴的无线通信技术,它能够巧妙地利用主用户的空闲频谱。非连续正交频分复用(NCOFDM)多载波系统被认为是CR物理层的合适候选,但由于其高副瓣,其高带外辐射(OOB)会影响其频谱共享能力。在本文中,我们提出了两种搜索算法:遗传算法(GA)和萤火虫算法(FFA)来估计抵消子载波(cc)的幅度。这些cc被插入到使用的NCOFDM信号的两侧以抵消旁瓣。仿真结果表明,与文献中已有的方法相比,本文提出的算法具有更好的旁瓣抑制效果。
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引用次数: 12
Extended color code and Automated Quantification of Islet cells 胰岛细胞的扩展颜色编码和自动定量
Muhammad Tariq Baloch, S. Zaman, F. Wahab
Alpha (α) and Beta (β) Islet cells in pancreas of Langerhans can be utilized for analyzing primitive diabetes of both types 1 and 2. Manual counting and conventional investigation of such histological tissues is quite laborious, time taking, less reliable, and subject to error. In order to achieve more accurate results as quickly as possible, the presented work devices a novel color scheme code (I4) from existing schemes (I1,I2,I3). Moreover the work offers an Automated Quantification technique for enumeration and segmentation of pancreatic mass from microscopic images. The technique includes five modules; (1) Segmentation to magnify Islet cells from the rest of mass, (2) Equalization uses Contrast-Limited Adaptive Histogram equalization method in order to enhance contrasts between different intensity levels, (3) Color Space Formation uses existing color spaces with proposed smart calculations to construct novel color space code, (4) Image Conversion applies novel color space code on the image followed by certain post processing (binarization, hole-filling, erosion), and (5) Cell Analysis uses connected component labeling to finally identify and label the cells. The technique is evaluated against a number of diverse microscopic images obtaining satisfactory empirical results with recognition confidence interval in terms of true positive, false positive, and false negative are respectively 97.75 ± 2.64, 1.79 ± 1.04, and 1.37 ± 0.84. The work offers two contributions: it devices a novel color scheme, and offers an automated quantification methodology.
朗格汉斯胰腺的α (α)和β (β)胰岛细胞可用于分析1型和2型原始糖尿病。这种组织学组织的人工计数和常规调查相当费力,耗时,不太可靠,而且容易出错。为了尽快获得更准确的结果,本文提出的工作装置从现有的方案(I1,I2,I3)中获得了一种新的配色方案代码(I4)。此外,这项工作提供了一种自动量化技术,用于从显微镜图像中枚举和分割胰腺肿块。该技术包括五个模块;(1)分割将胰岛细胞从其他质量中放大;(2)均衡化使用对比度有限的自适应直方图均衡化方法来增强不同强度水平之间的对比度;(3)颜色空间形成使用现有的颜色空间并提出智能计算来构建新的颜色空间代码;(4)图像转换在图像上应用新的颜色空间代码,然后进行一定的后处理(二值化,填充孔,侵蚀)。(5)细胞分析(Cell Analysis)采用连通成分标记,最终对细胞进行识别和标记。该技术对多种显微图像进行了评估,获得了令人满意的经验结果,在真阳性、假阳性和假阴性方面的识别置信区间分别为97.75±2.64、1.79±1.04和1.37±0.84。这项工作提供了两个贡献:它设计了一种新的配色方案,并提供了一种自动化的量化方法。
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引用次数: 0
A community-centric access control scheme for Online Social Networks 以社区为中心的在线社交网络访问控制方案
Yousra Asim, Wajeeha Naeem, Ahmad Kamran Malik
Online Social Network facilitate its users to form groups for sharing their personal information, interests and activities with their friends, relatives and others. Such type of information disclosure can cause problems for people in terms of security. Access of different group members is controlled in Online Social Networks to minimize such security risks to personal information and user resources. Researchers have used social network actor-relationship graph to control the access based on relationship type, trust and attributes. This paper discusses available techniques in CBAC, ABAC and ReBAC to provide security to social network data and objects. A community-centric access control model using brokerage roles, attributes, and trust techniques is presented with its formal description.
在线社交网络方便用户组成小组,与他们的朋友、亲戚和其他人分享他们的个人信息、兴趣和活动。这种类型的信息泄露会给人们带来安全方面的问题。Online Social Networks对不同群组成员的访问进行了控制,将个人信息和用户资源的安全风险降到最低。研究者基于关系类型、信任和属性,利用社会网络角色关系图对访问进行控制。本文讨论了在CBAC、ABAC和ReBAC中可用的技术来为社交网络数据和对象提供安全性。本文给出了一个以社区为中心的访问控制模型,该模型使用代理角色、属性和信任技术,并给出了它的正式描述。
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引用次数: 0
Non-linear filtering techniques for high precision GPS applications 高精度GPS应用的非线性滤波技术
S. Nisar, Ihsan Ullah
Nonlinear family of Kalman filters is employed to a nonlinear dynamic system for the purpose of state estimation. Extended, unscented and cubature Kalman filters are formulated and deployed to the nonlinear estimation of Global Positioning System(GPS) model. The state dynamics and measurement model of GPS is illustrated. Performance of extended, unscented and cubature Kalman filter is presented through simulation results. The results prove that the proposed use of CKF for GPS navigation outperforms other nonlinear filters. Computation complexity of each filter is also computed for comparison.
将非线性卡尔曼滤波器族用于非线性动态系统的状态估计。提出了扩展卡尔曼滤波器、无气味卡尔曼滤波器和cubature卡尔曼滤波器,并将其应用于全球定位系统(GPS)模型的非线性估计。阐述了GPS的状态动力学和测量模型。仿真结果显示了扩展卡尔曼滤波器、无气味卡尔曼滤波器和培养卡尔曼滤波器的性能。结果表明,该方法在GPS导航中的应用优于其他非线性滤波方法。并对各滤波器的计算复杂度进行了比较。
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引用次数: 3
UWB BAN antennas: Recent trend and developments UWB BAN天线:最近的趋势和发展
Sajjad Hussain, Wajiha Munir
This paper provides a detailed review of Ultra Wide Band (UWB) antennas designed for Body Area Network (BAN) applications, published during last five years. Design parameters namely substrate, size, feeder, bandwidth, design structure (geometry) and use of Artificial Magnetic Conductor (AMC) are discussed. Performance in term of gain, radiation pattern, Specific Absorption Rate (SAR) of antennas near human body are reviewed.
本文详细回顾了近五年来为体域网络(BAN)应用设计的超宽带(UWB)天线。讨论了设计参数,即衬底、尺寸、馈线、带宽、设计结构(几何形状)和人工磁导体(AMC)的使用。从增益、辐射方向图、比吸收率(SAR)等方面综述了近人体天线的性能。
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引用次数: 3
期刊
2017 International Conference on Communication, Computing and Digital Systems (C-CODE)
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