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2018 12th International Conference on Signal Processing and Communication Systems (ICSPCS)最新文献

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Frequency Utilization Efficiency Improvement by Using MLD in Spectrum Suppressed Transmission 利用MLD提高频谱抑制传输的频率利用效率
Motoi Shirai, Sumika Omata, T. Sugiyama
Spectrum suppressed transmission that increases the frequency utilization efficiency (throughput / required bandwidth) by suppressing the required bandwidth (3dB bandwidth) has been proposed to solve the frequency band exhaustion. However, in spectrum suppressed transmission, transmission quality degrades due to ISI (Inter Symbol Interference) caused by suppressing the required bandwidth to less than the Nyquist bandwidth. In this paper, in order to further improve transmission quality degradation and frequency utilization efficiency, we have proposed spectrum suppressed transmission applying MLD (Maximum Likelihood Detection) in addition to a powerful FEC (forward error correction). Then, we have quantitatively evaluated bit error rate performances and the frequency utilization efficiency in the proposed scheme by computer simulations.
频谱抑制传输通过抑制所需带宽(3dB带宽)来提高频率利用效率(吞吐量/所需带宽)来解决频段耗尽问题。然而,在频谱抑制传输中,由于将所需带宽抑制到小于奈奎斯特带宽而引起的码间干扰(ISI),导致传输质量下降。在本文中,为了进一步改善传输质量退化和频率利用效率,我们提出了采用最大似然检测(MLD)和强大的前向纠错(FEC)的频谱抑制传输。然后,通过计算机仿真定量评价了该方案的误码率性能和频率利用效率。
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引用次数: 0
Modeling and Evaluation of Pre-Copy Live VM Migration Using Probabilistic Model Checking 基于概率模型检查的预拷贝动态虚拟机迁移建模与评估
A. Bashar, Nazeeruddin Mohammad, Shahabuddin Muhammed
The proliferation of cloud technologies hosting complex applications has taken availability, scalability and affordabil-ity of IT services to the next level. Live VM migration is one of the core tools that automates the process of workload transfer without interfering with the applications running in dynamic cloud environments. In this paper we propose and implement a probabilistic model checking framework to study live VM migration process. In particular, we modeled well-known precopy live migration approach and evaluated the influence of various system parameters on the performance of live migration. The proposed implementation can be used as a stepping stone for modeling more complex live migration scenarios, and it can be a very beneficial tool for cloud service providers in predetermining various critical performance parameters of their cloud data centers in relation to the optimized utilization of the valuable IT resources.
托管复杂应用程序的云技术的激增将IT服务的可用性、可伸缩性和可负担性提升到了一个新的水平。实时VM迁移是自动化工作负载传输过程的核心工具之一,它不会干扰在动态云环境中运行的应用程序。本文提出并实现了一个概率模型检验框架来研究虚拟机迁移过程。特别是,我们对众所周知的预拷贝实时迁移方法进行了建模,并评估了各种系统参数对实时迁移性能的影响。建议的实现可以用作对更复杂的实时迁移场景进行建模的垫脚石,对于云服务提供商来说,它可以是一个非常有益的工具,用于预先确定其云数据中心的各种关键性能参数,以优化有价值的it资源的利用率。
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引用次数: 6
Using Deep Learning to Identify Potential Roof Spaces for Solar Panels 利用深度学习识别太阳能电池板的潜在屋顶空间
Dorian House, M. Lech, Melissa N. Stolar
Solar photovoltaic (PV) installation businesses frequently encounter problems with lead generation. A commonly used approach to identify credible customers involves cold-calling contacts from a purchased database containing very limited information or information that is inaccurate, out of date, and doesn't identify whether the building already has solar PV installed. This process of contacting potential customers, therefore, is often time-consuming, cost-ineffective, and inefficient, which results in increased costs for customers to account for these limitations. The objective of the current research project is to propose a method of automating this industry problem by applying Deep Neural Networks (DNNs). A Semantic Segmentation Network (SegNet) will be utilized, with a database of satellite images and corresponding pixel label images. The SegN et will seek to identify buildings from satellite imagery, and to in turn identify whether buildings have pre-existing solar installations, using a cascaded Convolutional Neural Network (CNN). Transfer learning on the CNN will fine-tune the network to classify roofs of buildings into two categories of having solar PV installed and not having solar PV installed. The CNN will be trained and tested on separate augmented databases to improve the classification accuracy with the output of the system recording a database of buildings without solar PV installed. By automating what was previously a time-consuming manual process, the savings incurred can be passed onto customers. Results of the current project demonstrate successful segmentation of buildings and identification of pre-existing solar PV installations. Implications of results are discussed.
太阳能光伏(PV)安装企业经常遇到引线发电的问题。一种常用的识别可靠客户的方法是从购买的数据库中拨打电话联系,该数据库包含非常有限的信息或不准确、过时的信息,并且无法确定建筑物是否已经安装了太阳能光伏。因此,这种联系潜在客户的过程通常是耗时的,成本无效的,效率低下的,这导致客户增加了考虑这些限制的成本。当前研究项目的目标是通过应用深度神经网络(dnn)提出一种自动化这个行业问题的方法。将使用语义分割网络(SegNet),具有卫星图像数据库和相应的像素标签图像。SegN et将试图从卫星图像中识别建筑物,然后使用级联卷积神经网络(CNN)识别建筑物是否预先存在太阳能装置。CNN上的迁移学习将对网络进行微调,将建筑物的屋顶分为安装太阳能光伏和未安装太阳能光伏两类。CNN将在单独的增强数据库上进行训练和测试,以提高分类精度,系统的输出记录了没有安装太阳能光伏的建筑物的数据库。通过自动化以前耗时的手工流程,节省的费用可以传递给客户。目前项目的结果表明,建筑的成功分割和预先存在的太阳能光伏装置的识别。讨论了结果的含义。
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引用次数: 8
Performance Analysis of Compressive Sensing Based Physical Layer Authentication for AMI 基于压缩感知的AMI物理层认证性能分析
Yonggu Lee, E. Hwang, Jinho Choi
Advanced metering infrastructure (AMI) systems play a crucial role in smart grid, where smart meters have two-way communications to remotely send meter readings up on request. While wireless technologies are highly desirable for flexible, adaptable, and cost-effective smart metering deployments, there are a number of issues to be addressed in terms of security and privacy. In this paper, we study a compressive sensing (CS) based physical layer authentication scheme over a multicarrier system and analyze its security performance against impersonation attack. In particular, we derive conditional distributions for the hypothesis testing used in authentication. From them, we are able to guarantee security performances in terms of the probabilities of false alarm and authentication error.
先进的计量基础设施(AMI)系统在智能电网中发挥着至关重要的作用,智能电表具有双向通信功能,可以根据要求远程发送电表读数。虽然无线技术非常适合灵活、适应性强且经济高效的智能计量部署,但在安全性和隐私性方面仍有许多问题需要解决。本文研究了一种基于压缩感知(CS)的多载波系统物理层认证方案,并分析了其抗冒充攻击的安全性能。特别地,我们导出了用于认证的假设检验的条件分布。从虚警概率和鉴权错误概率两方面来保证安全性能。
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引用次数: 1
Spatially Constrained Anti-Aliasing Filter Using Slepian Eigenfunction Window on the Sphere 球面上基于Slepian特征函数窗口的空间约束抗混叠滤波器
U. Elahi, Z. Khalid, R. Kennedy
Spherical microphone arrays sample the sound field on the sphere in both space and time. The performance of spherical microphone arrays is typically limited by spatial aliasing which introduces side-lobes in the array beam pattern. In order to reduce the aliasing error, anti-aliasing filters, both ideal and spatially constrained, have been presented in the literature. In this paper, we propose a slepian eigenfunction window which spatially truncate the ideal anti-aliasing filter used in literature to design a spatially constrained anti-aliasing filter. We also provide an illustration to show that the aliasing on the beam pattern is reduced by the use of the proposed anti-aliaisng filter and compare the results with the spatially constrained filters obtained by applying rectangular and hamming windows. Robustness analysis such as measurement of the white noise gain and directivity index shows the superiority of the proposed filter over other spatially constrained anti-aliasing filters.
球形麦克风阵列对球体上的声场进行时空采样。球面传声器阵列的性能通常受到空间混叠的限制,这种混叠会在阵列波束方向图中引入旁瓣。为了减少混叠误差,文献中提出了理想的和空间约束的抗混叠滤波器。在本文中,我们提出了一个睡眠特征函数窗口,该窗口在空间上截断文献中使用的理想抗混叠滤波器来设计一个空间约束的抗混叠滤波器。我们还提供了一个例子,表明使用所提出的抗混叠滤波器可以减少光束图案上的混叠,并将结果与使用矩形窗和汉明窗获得的空间约束滤波器进行了比较。鲁棒性分析,如白噪声增益和指向性指数的测量表明,该滤波器优于其他空间约束抗混散滤波器。
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引用次数: 3
Exploiting Big Data Analytics for Urban Planning and Smart City Performance Improvement 利用大数据分析促进城市规划和智慧城市绩效改善
Bhagya Nathali Silva, Murad Khan, Jihun Seo, Diyan Muhammad, Yongtak Yoon, Jihun Han, K. Han
The smart city notion facilitate interoperation among multiple disciplines to improve the Quality of Life (QoL) of urban citizens. Unceasingly growing urban networks has significantly increased the data processing complexity. In consequence, real-time data processing and analysis has become a major concern in modern smart city designing and implementation. Considering the challenges of existing smart cities, in this work we propose a smart city architecture embedded with Big Data Analytics (BDA). The utmost goal of the proposed scheme is to enhance the quality of real-time decision-making through efficient Big Data (BD) processing. The proposed architecture is in three folds to manage data collection, data processing, and data application. We evaluate the proposed BDA embedded smart city using authentic datasets on water consumption, traffic congestion, parking management, and air pollution measurements. The analysis offer useful insights for the community development, while ensuring the performance improvement of the proposed framework in terms of processing time and throughput.
智慧城市的概念促进了多学科之间的相互作用,以提高城市居民的生活质量。不断增长的城市网络使得数据处理的复杂性大大增加。因此,实时数据处理和分析已成为现代智慧城市设计和实施的主要关注点。考虑到现有智慧城市的挑战,在这项工作中,我们提出了一个嵌入大数据分析(BDA)的智慧城市架构。该方案的最大目标是通过高效的大数据处理来提高实时决策的质量。提出的体系结构分为三层,分别管理数据收集、数据处理和数据应用。我们使用有关用水量、交通拥堵、停车管理和空气污染测量的真实数据集来评估拟议的BDA嵌入式智慧城市。该分析为社区发展提供了有用的见解,同时确保拟议框架在处理时间和吞吐量方面的性能改进。
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引用次数: 6
The Impact of MIMO on IoT Network Coverage: Case Study with Smart-BEEM MIMO对物联网网络覆盖的影响:以Smart-BEEM为例
Lina Xu
Multiple-In-Multiple-Out (MIMO) technologies have been widely deployed in order to realise 5G communication goals. Due to the large coverage and fast speed, cellular involved IoT backhaul with MIMO capability is becoming a popular approach adopted by many Internet of Things (IoT) systems. With more communication interfaces available, it is easy to see that the system will consume more energy. If considering network coverage is the most critical metric for an IoT system, and then the problem is: is MIMO always necessary and beneficial? Our argument is that the answer is highly depending on the deployment and applications. Through the demonstration of the management of Smart-BEEM, this paper has investigated the impact of MIMO on the network coverage. The results have revealed that the gain that MIMO can bring to an IoT network coverage highly depends on the energy cost for idle listening. Without proper sleeping scheduling mode implemented on the devices, using MIMO may undermine the overall network coverage. In an IoT network with specific tasks, involving massive communication interfaces may cause redundant communication capability problem and waste energy from unnecessary idle listening.
多入多出(MIMO)技术已被广泛部署,以实现5G通信目标。由于覆盖范围大,速度快,具有MIMO功能的蜂窝参与物联网回程正成为许多物联网(IoT)系统采用的流行方法。随着更多的通信接口可用,很容易看到系统将消耗更多的能量。如果考虑网络覆盖是物联网系统最关键的指标,那么问题是:MIMO是否总是必要和有益的?我们的观点是,答案很大程度上取决于部署和应用程序。通过对Smart-BEEM管理的演示,研究了MIMO对网络覆盖的影响。结果表明,MIMO可以为物联网网络覆盖带来的增益在很大程度上取决于空闲侦听的能源成本。如果在设备上没有实现适当的睡眠调度模式,使用MIMO可能会破坏整个网络覆盖。在具有特定任务的物联网网络中,涉及大量通信接口可能会导致冗余通信能力问题,并因不必要的空闲侦听而浪费能量。
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引用次数: 1
The Smallest Critical Sets of Latin Squares 拉丁平方的最小临界集
Keith Hermiston
Latin squares are combinatorial constructions that have found widespread application in communication systems through frequency hopping designs, error correcting codes and encryption algorithms. In this paper, a new, lower bound on the cardinality of the critical sets of all Latin squares of order n is shown to be Ω(n!(n-3)!) where Ω is the summatory prime factorisation function (with multiplicities). The proof draws on the direct product of the symmetric groups Sn and Sn-3. The smallest critical set cardinalities of the new bound align with its known, calculated values and reduce previously proven bounds for n > 8. The proof refutes the long standing Nelder conjecture.
拉丁平方是一种组合结构,通过跳频设计、纠错码和加密算法在通信系统中得到了广泛的应用。本文证明了所有n阶拉丁平方的临界集的基数的一个新的下界是Ω(n!(n-3)!),其中Ω是求和质因数分解函数(具有多重性)。这个证明利用了对称群Sn和Sn-3的直积。新边界的最小临界集基数与其已知的计算值对齐,并减少先前证明的n > 8的边界。这个证明驳斥了长期存在的Nelder猜想。
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引用次数: 1
A Case for Frequency Domain Window Based Nyquist Filter Design 基于频域窗的奈奎斯特滤波器设计实例
Q. Chaudhari
In the digital domain, a Square-Root Raised Cosine Filter (SRRC) has historically been used in most of the wireless standards for shaping the spectrum at the Tx and matched filtering the signal at the Rx (the combination forms a Raised Cosine (RC) filter). However, the performance of an SRRC filter in terms of peak ISI and peak sidelobe attenuation is fairly average, to say the least. A transformed lowpass filter designed according to Parks-McClellan algorithm is an alternative pulse shaping technique which is generally believed to be optimal due to the lowpass filter coefficients being the optimal solution based on Remez exchange algorithm and Chebyshev approximation theory such that the maximum error between the desired and the actual frequency response is minimized. In this paper, we show that another technique proposed in [3] based on an optimized frequency domain window convolved with a rectangular spectrum matches fairly well against the lowpass filter based method at all instances in terms of peak ISI and sidelobe attenuation.
在数字领域,平方根上升余弦滤波器(SRRC)历来用于大多数无线标准中,用于在Tx处塑造频谱并在Rx处匹配滤波信号(组合形成上升余弦滤波器(RC))。然而,在峰值ISI和峰值旁瓣衰减方面,SRRC滤波器的性能至少可以说是相当平均的。根据Parks-McClellan算法设计的变换低通滤波器是一种替代脉冲整形技术,由于低通滤波器系数是基于Remez交换算法和Chebyshev近似理论的最优解,使得期望频率响应与实际频率响应之间的最大误差最小,因此通常被认为是最优的。在本文中,我们证明了[3]中提出的另一种基于优化的频域窗口与矩形频谱卷积的技术在峰值ISI和旁瓣衰减方面与基于低通滤波器的方法在所有实例中都相当匹配。
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引用次数: 0
ECG-Derived Respiration Using a Real-Time QRS Detector Based on Empirical Mode Decomposition 基于经验模态分解的实时QRS检测器的心电图衍生呼吸
Christina Kozia, R. Herzallah, D. Lowe
Respiration Rate (RR) is an important physiological indicator and plays a major role in health deterioration monitoring. Despite that, it has been neglected in hospital wards due to inadequate nursing skills and insufficient equipment. ECG signal, which is always monitored in a clinical setting, is modulated by respiration which renders it a highly enticing mean for the automatic RR estimation. In addition, accurate QRS detection is pivotal to RR estimation from the ECG signal. The investigation of QRS complexes is a continuing concern in ECG analysis because current methods are still inaccurate and miss heart beats. This paper presents a frequency domain RR estimation method which uses a novel real-time QRS detector based on Empirical Mode Decomposition (EMD). Another novelty of the proposed work stems from the RR estimation in the frequency domain as opposed to some of the current methods which rely on a time domain analysis. As will be shown later, the RR extraction in the frequency domain provides more accurate results compared to the time domain methods. Moreover, our novel QRS detector uses an adaptive threshold over a sliding window and differentiates large Q- from R-peaks, facilitating a more accurate RR estimation. The performance of our methods was tested on real data from Capnobase dataset. An average mean absolute error of less than 0.5 breath per minute was achieved using our frequency domain method, compared to 6 breaths per minute of the time domain analysis. Moreover, our modified QRS detector shows comparable results to other published methods. achieving a detection rate over 99.80%.
呼吸速率(RR)是一项重要的生理指标,在健康恶化监测中起着重要作用。尽管如此,由于护理技能不足和设备不足,它在医院病房中一直被忽视。在临床环境中经常监测的心电信号是由呼吸调节的,这使得它成为自动RR估计的一个非常诱人的方法。此外,准确的QRS检测对心电信号的RR估计至关重要。QRS复合体的研究一直是心电分析中关注的问题,因为目前的方法仍然不准确,遗漏了心跳。本文提出了一种基于经验模态分解(EMD)的实时QRS检测器的频域RR估计方法。提出的工作的另一个新颖之处源于频域的RR估计,而不是当前依赖于时域分析的一些方法。正如后面所示,与时域方法相比,频域的RR提取提供了更准确的结果。此外,我们的新型QRS检测器在滑动窗口上使用自适应阈值,并区分大Q-峰和r -峰,从而促进更准确的RR估计。在Capnobase数据集的实际数据上对我们的方法进行了性能测试。使用我们的频域方法实现的平均绝对误差小于每分钟0.5次呼吸,而时域分析为每分钟6次呼吸。此外,我们改进的QRS检测器显示出与其他已发表的方法相当的结果。检测率达到99.80%以上。
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引用次数: 4
期刊
2018 12th International Conference on Signal Processing and Communication Systems (ICSPCS)
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