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2018 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET)最新文献

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FPGA Implementation of Space-Based AIS 天基AIS的FPGA实现
M. Adarsh, K. Adithya, Akshay Nimbal
The Automatic Identification System (AIS) is an automated tracking system used for exchanging static and dynamic vessel information between the AIS terminals. Data transmitted by the AIS station is received by other vessel or base station. But due to the range limitations in the ground-based network, we go for Space-based Universal ship-borne Automatic Identification System (S-AIS) wherein the AIS-Data is received by satellite for the global coverage. In this paper, we present the performance analysis of the space-based AIS system considering the Field of View (FoV) of the satellite spanning a large number of Self-Organizing Time Division Multiple Access (SOTDMA) clusters and implementation of AIS Modem using SOTDMA scheme with Gaussian Minimum Shift Keying (GMSK) modulation. The introduction of reconfigurable devices and high level hardware description languages have made the design of AIS modem to be implemented efficiently on Virtex5-xc5vlx110t FPGA. The system is optimized in terms of hardware utilization. The SOTDMA architecture is designed at the Behavioral level of abstraction with constraints as defined by International Telecommunication Union (ITU) and is implemented using Verilog Hardware Description Language (HDL) on the FPGA, GMSK modulator and demodulator is designed in Xilinx System Generator. The SOTDMA architecture implemented is tested by considering multiple users to verify the unique slot allocation within a SOTDMA cluster. The FPGA implementation results are presented.
自动识别系统(AIS)是一种自动跟踪系统,用于在AIS终端之间交换静态和动态船舶信息。AIS站发送的数据被其他船只或基站接收。但由于地面网络的范围限制,我们选择了天基通用舰载自动识别系统(S-AIS),其中ais数据由卫星接收,覆盖全球。本文在考虑卫星视场(FoV)跨越大量自组织时分多址(SOTDMA)集群的情况下,对天基AIS系统进行了性能分析,并采用高斯最小移位键控(GMSK)调制的SOTDMA方案实现了AIS调制解调器。引入可重构器件和高级硬件描述语言,使得AIS调制解调器的设计能够在Virtex5-xc5vlx110t FPGA上高效实现。系统在硬件利用率方面进行了优化。SOTDMA架构采用国际电信联盟(ITU)定义的约束在行为抽象层进行设计,在FPGA上使用Verilog硬件描述语言(HDL)实现,GMSK调制器和解调器在Xilinx System Generator中设计。通过考虑多个用户来验证SOTDMA集群内的唯一插槽分配,对实现的SOTDMA体系结构进行了测试。给出了FPGA实现结果。
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引用次数: 4
Enhanced Multi-Controller Placements in SDN SDN中增强的多控制器位置
G. Ramya, R. Manoharan
The proliferation of connected devices and data traffic leads to the design of “Software Defined Network” (SDN) that separates control logic from data forwarding logic for effective administration of the network through offering programmable interfaces. The control logic for a network is installed in SDN Controller, which may be placed in a few selected places of the network to effectively control network activities. There exist many research proposals to place the controllers in optimal locations of the network to improve the performances. However, a few attempts were made to identify the number of controllers required for a network and place them in optimal locations using meta-heuristic algorithms or mathematical models. Moreover, handling the fault tolerance in the event of controller problems due to heavy traffic has not been effectively addressed. Considering the aforementioned issues, this work proposes a Pareto based tabu search for optimal placement of controllers and a migration algorithm to handle controller overhead due to heavy traffic.
连接设备和数据流量的激增导致了“软件定义网络”(SDN)的设计,它通过提供可编程接口将控制逻辑与数据转发逻辑分离,从而有效地管理网络。网络的控制逻辑安装在SDN控制器中,它可以放置在网络的几个选定的地方,以有效地控制网络活动。目前已有许多研究建议将控制器置于网络的最优位置以提高性能。然而,我们尝试了一些方法来确定网络所需的控制器数量,并使用元启发式算法或数学模型将它们放置在最佳位置。此外,由于流量过大导致控制器出现问题时的容错处理还没有得到有效解决。考虑到上述问题,本工作提出了一种基于Pareto禁忌搜索的控制器最优位置和一种迁移算法来处理由于大流量引起的控制器开销。
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引用次数: 5
Standalone Heartbeat Extraction in SCG Signal Using Variational Mode Decomposition 基于变分模态分解的SCG信号独立心跳提取
Tilendra Choudhary, L. Sharma, M. Bhuyan
In this paper, a variational mode decomposition (VMD) based heartbeat extraction framework is proposed for seismocardiogram (SCG) signal. A reference cardiac signal such as ECG is not needed in our proposed method. The proposed method consists of four major steps: signal decomposition using VMD algorithm, heart rate (HR) envelope construction, low pass filtering of constructed envelope, and annotation of smoothed envelope. The method annotates the HR envelope in terms of characteristic points such as PZCI, NZCI, PI, and TI. Each of the characteristic points can be used for SCG cycle extraction. The proposed method is tested and validated with CEBS database available at the Physionet archieve. Based on the experimental results, it is observed that the proposed method with peak instances (PI) achieves consistent results with good accuracy among all. The qualitative analysis of performance results shows good performance of the proposed method for healthy subjects.
本文提出了一种基于变分模态分解(VMD)的地震心动图(SCG)信号心跳提取框架。该方法不需要参考心电图等心脏信号。该方法包括四个主要步骤:利用VMD算法对信号进行分解、构建心率包络、对构建的包络进行低通滤波、对平滑包络进行标注。该方法用PZCI、NZCI、PI、TI等特征点对HR包络进行标注。每个特征点都可以用于SCG循环提取。所提出的方法在Physionet存档的CEBS数据库中进行了测试和验证。实验结果表明,采用峰值实例(peak instance, PI)的方法得到的结果一致,且精度较高。定性分析结果表明,该方法对健康受试者具有良好的效果。
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引用次数: 8
On Fall Detection Using Smartphone Sensors 关于使用智能手机传感器进行跌倒检测
S. Biswas, Tanima Bhattacharya, Ramesh Saha
In today’s world there is rapid growth of technology in medical field. Body Sensor Networks are being used hugely for remote monitoring and support for people in need e.g. elderly, children, patients etc. Besides monitoring significant physiological parameters, posture and fall detection related to health monitoring has gained immense popularity. This work focuses on fall detection using accelerometer data as almost all people are nowadays carrying smartphones. A challenge lies in this field i.e. detecting sudden fall of an elderly or a patient because this needs immediate support. Delay can cause havoc to the person in need. This work basically aims to identify fall uniquely. An environment where the proposed algorithm can be deployed is proposed. Accuracy calculation of proposed technique is also given in support.
当今世界,医学领域的技术发展迅速。身体传感器网络被广泛用于远程监测和支持有需要的人,如老人、儿童、病人等。除了监测重要的生理参数外,与健康监测相关的姿势和跌倒检测也得到了广泛的普及。这项工作的重点是使用加速度计数据进行跌倒检测,因为现在几乎所有人都携带智能手机。这一领域存在一个挑战,即检测老年人或患者的突然跌倒,因为这需要立即支持。拖延会对有需要的人造成严重破坏。这项工作基本上是为了独特地识别秋天。提出了一种可部署该算法的环境。并给出了该方法的精度计算。
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引用次数: 5
Triple-band Compact Monopole Antenna Using Defected Ground Plane 利用缺陷地平面的三波段紧凑型单极天线
Saurabh Kumar, P. Suraj, Ritesh Kr. Badhai
In this paper, the design of a compact multiband antenna is proposed. The antenna is resonating at 2.4 GHz, 5.49 GHz and 7.83 GHz having band of operation 2.33–2.56 GHz for the IEEE 802.11b &g WLAN systems, 4.6–5.75 GHz for the IEEE 802.11a WLAN system.7.29–8.3 GHz for X band applications. The antenna has a compact size of 30 × 20 × 1.57 mm3. Concept of DGS is used in the proposed antenna for achieving the desired resonant frequency. Antenna parameters such as impedance bandwidth, current distributions, radiation patterns and antenna gain are studied using Ansoft HFSS. The antenna is found to have a peak gain of 6.06 dB at 7.83 GHz. The antenna is having an omni directional behavior throughout the range.
本文提出了一种小型多波段天线的设计方案。该天线谐振频率为2.4 GHz、5.49 GHz和7.83 GHz,工作频带为IEEE 802.11b和g WLAN系统的2.33-2.56 GHz, IEEE 802.11a WLAN系统的4.6-5.75 GHz, X频段应用的7.29 - 8.3 GHz。天线的尺寸为30 × 20 × 1.57毫米。为了达到期望的谐振频率,所提出的天线采用了DGS的概念。利用Ansoft HFSS对天线的阻抗带宽、电流分布、辐射方向图和天线增益等参数进行了研究。该天线在7.83 GHz时的峰值增益为6.06 dB。天线在整个范围内具有全向性能。
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引用次数: 0
A Comparative Analysis of Supervised Learning Techniques for Pixel Classification in Remote Sensing Images 遥感图像像素分类中监督学习技术的比较分析
R. Sivagami, R. Krishankumar, K. S. Ravichandran
Predicting the class labels for each pixel in a remote sensing image is a very challenging task. Due to the high spatial resolution of the remote sensing data, each pixel in a remote sensing image has a meaningful information. Therefore, identifying the homogeneous regions and annotating them with significant land cover information remains an open challenge. To handle this challenge supervised machine learning methods are adopted and they play a key role in dealing with these high dimensional data and understanding the landcover information of the geographical surfaces in a remote sensing image. The main aim of this study is to analyse the performance of different supervised learning algorithms for labelling each pixel for the images obtained from International Society for Photogrammetry and Remote Sensing (ISPRS) Vaihingen. From the comparative analysis it is concluded that the fine Gaussian support vector machine outperforms the other state of the art techniques with an overall classification Accuracy of about 75.1448%.
预测遥感图像中每个像素的类标签是一项非常具有挑战性的任务。由于遥感数据的高空间分辨率,使得遥感图像中的每个像元都具有有意义的信息。因此,识别同质区域并用重要的土地覆盖信息对其进行标注仍然是一个开放的挑战。为了应对这一挑战,采用了监督机器学习方法,它们在处理这些高维数据和理解遥感图像中地理表面的土地覆盖信息方面发挥了关键作用。本研究的主要目的是分析不同监督学习算法的性能,用于标记来自国际摄影测量与遥感学会(ISPRS) Vaihingen的图像的每个像素。对比分析表明,细高斯支持向量机的总体分类准确率约为75.1448%,优于其他先进的分类技术。
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引用次数: 2
A Broadband Circularly Polarized Microstrip Patch Antenna for X-Band Applications 用于x波段应用的宽带圆极化微带贴片天线
S. Bharathi, S. Natarajamani
This paper presents a broadband circularly polarized microstrip patch antenna. The proposed antenna is designed using an octagonal patch, finite ground plane with L shaped slot and two L shaped strips placed orthogonal to each other. By utilising the strips, Broadband, Axial Ratio bandwidth (ARBW) is achieved. From simulated results, impedance bandwidth (-10 dB) is 5.8 GHz (9.8 GHz–15.6 GHz) and AR bandwidth (3 dB) of the antenna is 7.3 GHz (8.7 GHz– 16 GHz). The antenna is proposed with a simple structure and broadband circularly polarized, which is used widely for X-Band applications.
提出了一种宽带圆极化微带贴片天线。该天线采用八角形贴片、带L形槽的有限地平面和两条互相正交的L形带进行设计。通过利用带材,实现了宽带、轴比带宽(ARBW)。仿真结果表明,天线的阻抗带宽(-10 dB)为5.8 GHz (9.8 GHz - 15.6 GHz), AR带宽(3 dB)为7.3 GHz (8.7 GHz - 16 GHz)。该天线结构简单,具有宽带圆极化特性,广泛应用于x波段。
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引用次数: 2
Estimating Pollution Contents in an Urban Area using Airborne Hyperspectral Thermal Data 利用机载高光谱热数据估算城市污染含量
J. George, J. Aravinth
The best remedy of pollution is its detection and control. The major pollutants in an urban area are asbestos and aerosol. This work introduces a technique to detect the pollutants in an area using hyperspectral data. Due to its enriched spectral information very minute contents are identified. The hyperspectral image is captured with the Telops' Hyper- Cam which contains thermal infrared bands which is used to create temperature map of that land surface thereby the different objects are classified according to different temperature ranges. The visible bands are also used to classify the image and the percentage of area under each class is calculated. To assess the accuracy of each classifier, confusion matrix is computed and identified that Support Vector Machine (SVM) classifier is the best other than Spectral Angle Mapper (SAM) and Spectral Information Divergence (SID) having accuracy of 94.89%. The amount of aerosol present in a locality is calculated with respect to a factor called $PM_{10}$ which gives the concentration of particles of dimension less than $10 mu mathrm {m}.$ Using the relation between $PM_{10}$ and atmospheric reflectance the value of $PM_{10}$ is obtained between $34 mu mathrm {g}/mathrm {m}^{3}mathrm {a}mathrm {n}mathrm {d}66mu mathrm {g}/mathrm {m}^{3}.$ It's level is above $15 mu mathrm {g}/mathrm {m}^{3}$which is the safe value according to Canadian jurisdiction so there is chance of hazardous health effects on human beings.
治理污染的最好办法是检测和控制污染。城市地区的主要污染物是石棉和气溶胶。本文介绍了一种利用高光谱数据检测某一区域污染物的技术。由于其丰富的光谱信息,非常微小的内容被识别。高光谱图像是由Telops的Hyper- Cam捕获的,其中包含热红外波段,用于创建陆地表面的温度图,从而根据不同的温度范围对不同的物体进行分类。可见光波段也被用来对图像进行分类,并计算每个类别下的面积百分比。为了评估每个分类器的准确性,计算了混淆矩阵,并确定支持向量机(SVM)分类器是除光谱角映射器(SAM)和光谱信息发散器(SID)之外的最佳分类器,准确率为94.89%。一个地区存在的气溶胶量是根据一个称为$PM_{10}$的因子来计算的,该因子给出了尺寸小于$10 mu mathm {m}的颗粒浓度。利用PM_{10}$与大气反射率之间的关系,得到PM_{10}$的值在$34 mu mathm {g}/ mathm {m}^{3} mathm {a} mathm {n} mathm {d}66mu mathm {g}/ mathm {m}^{3}之间。它的水平高于$15 mu mathm {g}/ mathm {m}^{3}$,这是根据加拿大司法管辖区的安全值,因此有可能对人类健康产生有害影响。
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引用次数: 1
Configuration of Aerial Mesh Networks with Internet of Things 基于物联网的空中网状网络配置
Manali Gupta, Vikash, S. Varma
Nowadays, Aerial Mesh Network is widely used in many areas by the tradition ways. We face some problem related to self configuration and controlled configuration. In this paper we propose a method which provides a feasible solution for some issue like intermittent link connectivity and mobility. For that we propose Middleware technology using Internet of Things (IoT) technology to configure Aerial Mesh Networks. So each device is configured with the IoT and work together as an Aerial Mesh Network. By using this methodology we have centralized controlled system to application, which can be applicable in different areas.
目前,航空网状网络以传统的方式广泛应用于许多领域。我们面临着一些与自配置和受控配置有关的问题。本文提出了一种方法,为解决链路间歇性连通性和移动性等问题提供了可行的解决方案。为此,我们提出了使用物联网(IoT)技术来配置空中Mesh网络的中间件技术。因此,每个设备都配置了物联网,并作为空中网状网络一起工作。这种方法使集中控制系统得以应用,可以适用于不同的领域。
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引用次数: 2
Analytical Study on Data Transmission in WBAN With User Mobility Support 支持用户移动性的WBAN数据传输分析研究
Ramesh Saha, S. Biswas
Mobility management plays a vital role in seamless data transmission for providing timely support to WBAN users. Health data should be transmitted without any interruption in with mobility of BAN user for monitoring and support in e-healthcare system. In this paper we illustrate different scenarios considering mobility of BAN user. We consider data transfer from patient to medical server using Internet technology, cloud services, vehicular ad-hoc network (VANET) and satellite communication for different scenarios. We propose a health monitoring framework and develop an analytical model for determining throughput of WBAN. Our numerical analysis reveals the throughput of different scenarios when throughput increases, end -to-end packet loss probability decreases with increase in nested communication links between sink node and medical server.
移动性管理对于实现数据的无缝传输,为WBAN用户提供及时的支持起着至关重要的作用。在电子医疗保健系统中,卫生数据的传输应不受任何干扰,并随BAN用户的移动性进行监测和支持。本文在考虑BAN用户移动性的情况下,给出了不同的场景。我们考虑使用互联网技术、云服务、车载自组织网络(VANET)和卫星通信在不同场景下从患者到医疗服务器的数据传输。我们提出了一个健康监测框架,并开发了一个确定无线宽带网络吞吐量的分析模型。我们的数值分析揭示了不同场景下的吞吐量,当吞吐量增加时,端到端丢包概率随着汇聚节点与医疗服务器之间嵌套通信链路的增加而降低。
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引用次数: 4
期刊
2018 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET)
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