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2018 International Conference on Information and Communication Technology Convergence (ICTC)最新文献

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Spectral asymmetry of EEG signals in transition from conscious to unconscious state 脑电信号从意识状态到无意识状态转换的频谱不对称性
Seong-Ho Park, I. Jung, Hyun-Chool Shin
We analyzed the electroencephalogram (EEG) spectral distribution during anesthesia. Especially, the spectral characteristics of alpha band(8~12Hz) at the frontal head were investigated. Using skewness and kurtosis, the asymmetry of spectral distribution was quantified. A set of EEG data from 10 subjects was obtained during general anesthesia with Propofol (dose rate of 12mg/kg/h). We observed distinct changes in spatial distribution of EEG spectrum near loss and recovery of consciousness. Also, spectral asymmetry was quantitatively measured in terms of skewness and kurtosis. These findings can be used for developing measures of the depth of anesthesia.
我们分析了麻醉期间脑电图(EEG)的频谱分布。重点研究了头部α波段(8~12Hz)的光谱特征。利用偏度和峰度对光谱分布的不对称性进行量化。采用异丙酚(剂量率12mg/kg/h)全身麻醉,获得10例患者的脑电图数据。我们观察到在意识丧失和恢复前后,脑电频谱的空间分布有明显的变化。此外,光谱不对称性在偏度和峰度方面进行了定量测量。这些发现可用于制定麻醉深度的措施。
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引用次数: 0
Analysis of Dual Connectivity Gain in Terms of Delay and Throughput 从延迟和吞吐量的角度分析双连接增益
Seongjoon Kang, S. Bahk
Dual connectivity is very important for gradual transition from LTE to 5G. Release 12 of the 3GPP specification introduced DC scheme, but what advantage we can get from DC is not evaluated yet. In this paper, we simulate the DC schemes (LTE – LTE DC, LTE-mmWave DC, mmWave – mmWave DC) using newly modified network simulator (NS3) for 5G and evaluate the DC gains in terms of throughput and delay. We demonstrate the DC would increase the throughput under the fast switching scheme and decrease the end-to-end delay a lot.
双连接对于从LTE逐步过渡到5G非常重要。3GPP规范的第12版引入了DC方案,但我们可以从DC中获得什么优势还没有评估。在本文中,我们使用新修改的5G网络模拟器(NS3)模拟了直流方案(LTE - LTE DC, LTE-毫米波DC,毫米波-毫米波DC),并从吞吐量和延迟方面评估了直流增益。我们证明了在快速交换方案下,DC可以提高吞吐量并大大降低端到端延迟。
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引用次数: 2
Beam Synthesis under Feasible Scenarios for Radar and Communications Combined Systems 雷达与通信组合系统可行方案下的波束合成
Hyeon-Jae Noh, Jungeun Lee, H. Yang
Spectrum sharing for radar and communications can maximize the utilization of frequency resource. Though several studies have considered the coexistence and joint transmission to accomplish the missions of radar target detection and wireless communications simultaneously, none of the previous studies have considered feasible scenarios. In this paper, we consider a feasible scenario under which all the multiple antennas at the base station are used for joint transmission of radar beams and communications signals. With a careful consideration of the channel models, a beam synthesis algorithm is reviewed for the shared antenna utilization for both radar and communications. Numerical evaluation is provided to investigate the trade-off between the radar and communications performance.
雷达与通信频谱共享可以最大限度地利用频率资源。虽然有研究考虑了共存和联合传输,以同时完成雷达目标探测和无线通信的任务,但之前的研究都没有考虑可行的场景。在本文中,我们考虑了一种可行的场景,在这种情况下,基站的所有多天线都用于雷达波束和通信信号的联合传输。在仔细考虑信道模型的基础上,提出了一种用于雷达和通信共享天线利用的波束合成算法。对雷达与通信性能之间的权衡进行了数值评估。
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引用次数: 1
3D Beamforming for 5G Millimeter Wave Systems Using Singular Value Decomposition and Particle Swarm Optimization Approaches 基于奇异值分解和粒子群优化方法的5G毫米波系统三维波束形成
Osama Alluhaibi, Manish Nair, Amjed Hazzaa, Aza Mihbarey, Jiangzhou Wang
Millimeter wave (mmWave) systems are one of the proposed solutions for the fifth generation (5G) mobile network. However, mmWave system experiences strong path loss due to higher frequencies. To solve this problem, such a system demands a narrow beampattern to reduce the loss of the mmWave signal energy due to the high path loss. One of the significant challenges to be addressed before their deployment is designing three dimensional (3D) beamforming algorithms, which are required to be directional. In this paper, we first propose two 3D beamforming algorithms with aim of tracking users in both the azimuth and elevation planes. Our proposed beamforming algorithms operates based on the principles of singular value decomposition (SVD) and particle swarm optimization (PSO). Furthermore, these beam-forming algorithms are designed to have limited or negligible side lobes, which cause less interference to the other users operating in the same cell. In order to achieve this objective, Kaiser Bessel (KB) filter is adopted which helps in mitigating side lobes in the synthesized beampattern. Based on our analysis, we gain some valuable insights. The proposed algorithms are shown to perform well in achieving considerable capacity and lower side lobs.
毫米波(mmWave)系统是第五代(5G)移动网络的拟议解决方案之一。然而,由于频率较高,毫米波系统会经历强烈的路径损耗。为了解决这个问题,这种系统需要窄波束模式,以减少由于高路径损耗而导致的毫米波信号能量损失。在部署之前需要解决的一个重大挑战是设计三维(3D)波束形成算法,该算法需要具有方向性。在本文中,我们首先提出了两种三维波束形成算法,目的是在方位角和仰角平面上同时跟踪用户。我们提出的波束形成算法基于奇异值分解(SVD)和粒子群优化(PSO)的原理。此外,这些波束形成算法被设计成具有有限或可忽略的侧瓣,这对在同一小区中操作的其他用户造成的干扰较小。为了实现这一目标,采用了Kaiser Bessel (KB)滤波器,该滤波器有助于减轻合成波束图中的侧瓣。根据我们的分析,我们获得了一些有价值的见解。所提出的算法在实现相当大的容量和较低的侧波方面表现良好。
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引用次数: 8
A Positioning Accuracy Enhancement Method Based on Inter-Vehicular Communication and Self-Organizing Map 基于车际通信和自组织地图的定位精度提高方法
Shengjie Ma, Hyukjoon Lee, Hong Cheng
Traditional low-cost GPS installed on vehicles and other equipment has a tolerance of tens of meters. With the help of auxiliary devices and/or methodologies such as Differential GPSs (DGPSs), Assisted GPSs (AG-PSs), Real-Time Kinematic (RTK), computer vision and etc., the positioning accuracy of GPS receivers increased a lot, but a certain amount of cost increased at the same time. In this paper, we propose a new cooperative vehicular localization scheme for improving the accuracy of GPS fixes based on Vehicle-to-vehicle (V2V) communication. The proposed scheme first estimates the distances between neighboring vehicles using WLS-DD scheme [1] and uses a machine learning technique called Constrained Self-Organizing Map (C-SOM) with a set of GPS fixes collected over time to generate the final estimates of GPS locations with much lower errors. We present simulation results that demonstrate the superior performance of the proposed Constrained-SOM.
安装在车辆和其他设备上的传统低成本GPS有几十米的误差。在差分GPS (dgps)、辅助GPS (ag - ps)、实时运动学(RTK)、计算机视觉等辅助装置和/或方法的帮助下,GPS接收机的定位精度大大提高,但同时也增加了一定的成本。为了提高GPS定位精度,提出了一种基于车对车(V2V)通信的车辆协同定位方案。所提出的方案首先使用WLS-DD方案[1]估计相邻车辆之间的距离,并使用一种称为约束自组织地图(C-SOM)的机器学习技术,结合一组随时间收集的GPS修复,以更低的误差生成GPS位置的最终估计。我们给出的仿真结果证明了所提出的约束som的优越性能。
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引用次数: 3
Two component data representation using piecewise approximation and specific points for IoT 使用分段逼近和物联网特定点的两分量数据表示
Hyunjae Park, Young-June Choi
In these days, concept of IoT is widely spread from individual devices to large industrial systems. However, data handling from IoT devices is on developing stage. Delivering large amount of data to server which mainly operates data analysis is required and it becomes a burden to network. Our work has focused on reducing volume of data to transmit with data approximation in the domain of time series data. We suggest a data representation method which separates data into specific data point and piecewise approximation values. In addition, we show the difference between raw data and reduced data in distance and in time series classification accuracy.
如今,物联网的概念从单个设备广泛传播到大型工业系统。然而,物联网设备的数据处理尚处于发展阶段。需要向主要进行数据分析的服务器传输大量数据,这给网络带来了负担。我们的工作重点是在时间序列数据领域中,利用数据逼近方法减少数据传输量。我们提出了一种数据表示方法,该方法将数据分离为特定的数据点和分段逼近值。此外,我们还展示了原始数据和简化数据在距离和时间序列分类精度方面的差异。
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引用次数: 0
Bayesian Deep Learning-based Confidence-aware Solar Irradiance Forecasting System 基于贝叶斯深度学习的自信感知太阳辐照度预测系统
HyunYong Lee, Byung-Tak Lee
For stable and successful use of grid-connected PV (photovoltaic) plants, it is quite necessary to know the expected power from PV plants in advance. However, forecasting PV output power accurately is difficult in practical cases where uncertainties are unavoidable. In this paper, we propose a confidence-aware forecasting system that produces a point forecast together with its confidence information. Our system classifies forecast outputs into confident forecasts and non-confident forecasts using the confidence information. Then, the confident forecast is used directly and the non-confident forecast is replaced by its lower bound, which is desirable for conservative scheduling of existing power plants. Through the experiments, we show that MAPE (maximum absolute percentage error) of the confident forecasts and the non-confident forecasts are 9.8% and 21.5%, respectively. We also show that the lower bound is lower than actual value in over 95% of the non-confident forecasts. The results show that our approach is good to classify forecasts into confident forecasts and non-confident forecasts and to produce effective lower bounds.
为了光伏并网电站的稳定和成功使用,提前了解光伏电站的预期功率是非常必要的。然而,在不确定性不可避免的实际情况下,准确预测光伏输出功率是很困难的。本文提出了一种具有置信度感知的预测系统,该系统在产生点预测的同时产生点预测的置信度信息。我们的系统使用置信度信息将预测输出分为可信预测和非可信预测。然后,直接使用置信预测,用置信预测的下界代替非置信预测,以满足现有电厂的保守调度要求。通过实验,我们发现自信预测和非自信预测的最大绝对百分比误差(MAPE)分别为9.8%和21.5%。我们还表明,在95%以上的非自信预测中,下限低于实际值。结果表明,我们的方法可以很好地将预测分为可信预测和非可信预测,并产生有效的下界。
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引用次数: 5
A Study on the ATSC 3.0 Service Following ATSC 3.0服务跟踪研究
Bongho Lee, Kyutae Yang, Sung-Ik Park, H. Kim, Soonchoul Kim
In ATSC 3.0 capable of mobile services, the functionality of service following is required when the user moves around the shadow area or travels to the adjacent broadcast network. This paper proposes a scheme of ATSC 3.0 service following by the definition of service following description format and the delivery and consumption behavior. With this proposed scheme, the user is able to continue the tuned service with keeping his eyes on the road wherever he enters the low signal strength area or travels to the edge of the broadcast zone.
在支持移动业务的ATSC 3.0中,当用户在阴影区域周围移动或移动到邻近的广播网络时,需要具有跟随业务的功能。本文提出了一种ATSC 3.0服务遵循方案,定义了服务遵循描述格式以及服务的交付和消费行为。在此方案下,用户无论进入低信号强度区域或走到广播区的边缘,都可以继续收看调谐后的服务。
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引用次数: 2
Soft assignment and multiple keypoint analysis-based pedestrian counting method 基于软分配和多关键点分析的行人计数方法
C. Jeong, Mooseop Kim, Hyung-Cheol Shin
Pedestrian counting in videos is an active computer vision research topic that has wide ranging application. Existing pedestrian counting methods predominantly use features extracted from the foreground following subtraction of the background. However, accurately locating the foreground in real environments is difficult, and background subtraction is computationally expensive. The keypoint approach, which counts pedestrians without background subtraction, is limited owing to lack of sufficient features and no consideration for stationary pedestrians. This letter proposes an accurate keypoint-based pedestrian counting method. As no single keypoint detector can yield optimal counting results under all conditions, such as image resolution, frame rate, and illumination, we combine complementary keypoint detectors to enrich the features and thereby enhance pedestrian counting results. In addition, the proposed method considers stationary pedestrians by analyzing static keypoints information. Information loss during vector quantization is also reduced by applying soft assignment during feature extraction. The results of experiments conducted on public databases indicate that the proposed method outperforms the state-of-the-art methods on realistic outdoor and indoor public datasets.
视频中的行人计数是一个活跃的计算机视觉研究课题,具有广泛的应用前景。现有的行人计数方法主要使用从前景中提取的特征,然后减去背景。然而,在真实环境中准确定位前景是困难的,并且背景减法的计算成本很高。关键点法在没有背景减法的情况下对行人进行计数,由于缺乏足够的特征,并且没有考虑静止的行人,因此受到限制。本文提出了一种精确的基于关键点的行人计数方法。由于单一关键点检测器无法在图像分辨率、帧率和光照等所有条件下都产生最佳的计数结果,因此我们结合互补关键点检测器来丰富特征,从而增强行人计数结果。此外,该方法通过分析静态关键点信息来考虑静止行人。通过在特征提取过程中应用软赋值,减少了矢量量化过程中的信息丢失。在公共数据库上进行的实验结果表明,该方法在室外和室内公共数据集上的性能优于当前最先进的方法。
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引用次数: 0
Scheduling for Machine Type Communications in LTE Systems LTE系统中机器类型通信的调度
Yared Zerihun Bekele, Young-June Choi
To accommodate the massive connectivity of Internet-of-Things (IoT) such as a smart meter application for cellular networks, 3GPP has standardized Machine Type Communication (MTC) and cellular IoT. The data transmission of such IoT exhibits a time-controlled and an event-driven feature which delivers short messages with low data rate but supports massive connectivity. In MTC and its advanced system including eMTC and 5G-NR, legacy data and IoT data share radio resource; thus, any existing scheduler can handle both types of data separately. In this paper, we prove that existing schedulers that favor instantaneous channel quality do not work effectively for IoT data. Based on this property, we suggest a modified First Maximum Expansion (m-FME) algorithm that removes channel feedback. Through simulation, we confirm that m-FME outperforms existing schedulers.
为了适应物联网(IoT)的大规模连接,例如蜂窝网络的智能电表应用,3GPP标准化了机器类型通信(MTC)和蜂窝物联网。这种物联网的数据传输具有时间控制和事件驱动的特性,可以提供低数据速率的短消息,但支持大规模连接。在MTC及其先进系统(包括eMTC和5G-NR)中,传统数据和物联网数据共享无线电资源;因此,任何现有的调度器都可以分别处理这两种类型的数据。在本文中,我们证明了支持瞬时通道质量的现有调度器不能有效地用于物联网数据。基于这一特性,我们提出了一种改进的第一次最大扩展(m-FME)算法,该算法消除了信道反馈。通过仿真,我们证实了m-FME优于现有的调度程序。
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引用次数: 1
期刊
2018 International Conference on Information and Communication Technology Convergence (ICTC)
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