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2020 International Conference on UK-China Emerging Technologies (UCET)最新文献

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A Flexible and Compact Metamaterial UHF RID Tag for Remote Sensing in Human Health 一种用于人体健康遥感的柔性紧凑超材料超高频RID标签
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205380
A. F. M. Fazilah, M. Jusoh, T. Sabapathy, Q. Abbasi, K. Hossain, H. Rahim, M. Yasin, M. N. Osman, M. Kamarudin, H. Majid, P. Soh
This paper presents a miniaturized UHF RFID tag antenna with increased gain using meander line techniques and metamaterial (MTM). The designed tag operates in the UHF RFID frequency band ranging from 860 to 960 MHz. It comprises of meandered lines with two hexagonal split ring resonators (H-SRRs) MTM cells. It is designed on a photo paper as its substrate which is 0.27 mm thick, with a dielectric constant of 3.2 and loss tangent of 0.05. Next, an RFID tag (NXP SL381213 UCODE G2iL chip) with an impedance of 23-j224 $Omega$ is integrated with the proposed antenna to assess its performance in terms of reflection coefficient, antenna gain and maximum reading range. The overall size of the tag is 92 mm x26 mm.
本文提出了一种利用弯曲线技术和超材料(MTM)实现增益增加的小型化超高频RFID标签天线。所设计的标签工作在860到960兆赫的UHF RFID频段。它由弯曲的线条和两个六边形分裂环谐振器(H-SRRs) MTM细胞组成。其衬底为0.27 mm厚的相纸,介电常数为3.2,损耗正切为0.05。接下来,将阻抗为23-j224 $Omega$的RFID标签(NXP SL381213 UCODE G2iL芯片)与所提出的天线集成,从反射系数、天线增益和最大读取范围等方面评估其性能。标签整体尺寸为92mm × 26mm。
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引用次数: 2
Continuous User Authentication Based on Deep Neural Networks 基于深度神经网络的连续用户认证
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205446
A. T. Kiyani, A. Lasebae, Kamran Ali
A user authentication method consists of a username, password, or any other related credential. These methods are mostly used only once to validate the user’s identity at the start of session. However, one-time verification of user’s identity is not resilient enough to provide adequate security all over the session. Such authentication methods should be adopted which can continuously verify that only genuine user is using the system resources for entire session. This research work has implemented a true continuous authentication system, based on keystroke dynamics, which tends to validate the user on each action by using the proposed robust recurrent confidence model(R-RCM). Moreover, the recurrent neural network(RNN) has been used to exploit the sequential nature of keystroke data. System has been tested with two experimental approaches and results are reported in mean genuine actions (ANGA) and imposter actions (ANIA).
用户身份验证方法由用户名、密码或任何其他相关凭据组成。这些方法大多只在会话开始时用于验证用户身份一次。但是,一次性验证用户身份的弹性不足以在整个会话期间提供足够的安全性。应该采用能够在整个会话中持续验证只有真正的用户在使用系统资源的认证方法。本研究工作基于击键动力学实现了一个真正的连续认证系统,该系统倾向于使用所提出的鲁棒循环置信模型(R-RCM)对用户的每次操作进行验证。此外,递归神经网络(RNN)已被用于开发击键数据的顺序性质。系统已经用两种实验方法进行了测试,并报告了平均真实行为(ANGA)和冒名顶替行为(ANIA)的结果。
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引用次数: 1
Learning the Wireless Channel: A Deep Neural Network Approach 学习无线信道:一种深度神经网络方法
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205318
Guangjin Shen, Muhammad R. A. Khandaker, Faisal Tariq
In this paper, we propose a new deep neural network (DNN)-based channel estimation method for the Rayleigh fading channel model. While deep learning has been considered for estimating channels in many communication scenarios, direct estimation of the basic wireless single-input single-output (SISO) communication channel coefficients has not been considered. The proposed DNN-based method can efficiently estimate the channel in real time. Extensive simulation results demonstrate that the proposed channel estimator outperforms conventional least square (LS) estimators in terms of bit error rate (BER) and mean square error (MSE). In addition, the proposed channel does not need channel statistics information or complex matrix computation, thereby reducing the amount of calculation significantly.
针对瑞利衰落信道模型,提出了一种基于深度神经网络的信道估计方法。虽然深度学习已被用于许多通信场景中的信道估计,但尚未考虑直接估计基本无线单输入单输出(SISO)通信信道系数。提出的基于深度神经网络的方法可以有效地实时估计信道。大量的仿真结果表明,该信道估计器在误码率(BER)和均方误差(MSE)方面优于传统的最小二乘(LS)估计器。此外,该信道不需要信道统计信息,也不需要复杂的矩阵计算,从而大大减少了计算量。
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引用次数: 2
Facile and Cost Effective Paper Based Triboelectric Nanogenerators for Self Powered Environmental Sensing System 用于自供电环境传感系统的纸张摩擦电纳米发电机
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205356
Muhammad Umaid Bukhari, M. Sajid, M. Q. Mehmood, M. Zubair, K. Riaz
Triboelectric nanogenerators (TENGs) have been introduced as a rational and effective way of powering the low consuming electronic devices and sensors. Mostly these nanogenerators are manufactured using costly materials and complex fabrication processes that restrict their usage especially in developing countries. In this paper, we have presented an inexpensive and facile TENG for powering the environmental sensor. Readily available and cost-effective materials were used for manufacturing TENG like paper, thread sealant PTFE tape, and pencil. The manufactured paper based TENG produced short circuit current and open circuit voltage of $110 mu mathrm{A}$ and 234 V respectively. The maximum power density of $96.22 mu mathrm{W} /$ cm2 was achieved at 5 M $Omega$. The rectified signal from TENG was used to charge a capacitor array of $300 mu mathrm{F}$ which was successively used to power the environmental sensor. Temperature and humidity can be measured by powering the environmental sensor with the help of the proposed TENG. This facile and cost-effective TENG can be easily manufactured and deployed in resource limited environment for self-powered sensing systems.
摩擦纳米发电机(TENGs)作为一种合理而有效的低功耗电子器件和传感器供电方式被引入。这些纳米发电机大多是使用昂贵的材料和复杂的制造工艺制造的,这限制了它们的使用,特别是在发展中国家。在本文中,我们提出了一种廉价和方便的TENG为环境传感器供电。制造TENG所用的材料包括纸张、螺纹密封剂、聚四氟乙烯胶带和铅笔。纸制TENG的短路电流和开路电压分别为$110 mu mathrm{A}$和234v。在5 M处达到$96.22 mu mathrm{W} /$ cm2的最大功率密度$Omega$。来自TENG的整流信号用于给$300 mu mathrm{F}$电容器阵列充电,该电容器阵列依次用于为环境传感器供电。温度和湿度可以通过在提出的TENG的帮助下为环境传感器供电来测量。这种简易和经济高效的TENG可以很容易地制造和部署在资源有限的环境中用于自供电传感系统。
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引用次数: 1
A Low Complexity Linear Precoding Method for Massive MIMO 大规模MIMO的低复杂度线性预编码方法
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205420
Salah Berra, M. Albreem, M. Abed
In massive multiple-input multiple-output (MIMO), the base-station (BS) is equipped with tens or hundreds of antennas to serve many users. The demand for a low complexity precoding algorithm is significantly increased. Linear precoding schemes, such as zero-forcing (ZF), are capable to obtain a quasi-optimum performance when a favourable channel propagation occurs in downlink massive (MIMO) systems. Particularly, conventional linear precoding techniques require to calculate a matrix inverse which increases the expenses of computational complexity. In this paper, a low complexity linear precoder based on a hybrid acceleration overrelaxation (AOR) method is proposed. The optimal relaxation, acceleration parameters, and the initial solution are selected to achieve an attractive balance between the performance and the computational complexity. Numerical results show that the proposed algorithm has greatly reduced the complexity from $mathcal{O}(K^{3})$ to $mathcal{O}(K^{2})$ (where K is the number of users). It also outperforms the up-to-date algorithms.
在大规模多输入多输出(MIMO)中,基站(BS)配备了数十或数百个天线来服务许多用户。对低复杂度预编码算法的需求显著增加。线性预编码方案,如零强迫(ZF),能够在下行链路大规模(MIMO)系统中获得有利的信道传播时获得准最佳性能。特别是传统的线性预编码技术需要计算矩阵逆,这增加了计算复杂度的开销。提出了一种基于混合加速超松弛(AOR)方法的低复杂度线性预编码器。选择最优松弛、加速度参数和初始解,以在性能和计算复杂度之间取得一个有吸引力的平衡。数值结果表明,该算法将复杂度从$mathcal{O}(K^{3})$大大降低到$mathcal{O}(K^{2})$ (K为用户数)。它也优于最新的算法。
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引用次数: 6
3D Mapping Methods and Consistency Checks to Exclude GNSS Multipath/NLOS Effects 排除GNSS多路径/NLOS影响的3D映射方法和一致性检查
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205423
Jasmine Zidan, Osama Alluhaibi, E. I. Adegoke, E. Kampert, M. Higgins, Col R. Ford
In urban canyons, the positioning accuracy obtainable from global navigation satellite systems (GNSS) is mainly impaired by signal interference due to multipath and non-lineof-sight (NLOS) effects. GNSS is one of the sensors used in connected autonomous vehicles (CAVs) for positioning, navigation and timing (PNT). Hence, it is essential that GNSS receivers in CAVs are robust and resilient. In this paper, a method consisting of two layers of GNSS observation checks is suggested to exclude these effects in order to improve the positioning accuracy. The first layer excludes all non-consistent measurements identified by a chi-square test threshold. The second layer uses a decision tree for the exclusion of any remaining multipath/NLOS affected measurements, based on a data set obtained from a ray tracer for a 3D mapped model environment. The simulation results show an enhancement in positioning accuracy greater than 95%.
在城市峡谷中,全球卫星导航系统(GNSS)的定位精度主要受到多径和非视距(NLOS)效应的信号干扰的影响。GNSS是用于联网自动驾驶汽车(cav)定位、导航和授时(PNT)的传感器之一。因此,cav中的GNSS接收器必须具有鲁棒性和弹性。为了提高定位精度,本文提出了一种由两层GNSS观测检查组成的方法来排除这些影响。第一层排除了由卡方检验阈值识别的所有不一致的测量。第二层使用决策树来排除任何剩余的多路径/NLOS影响的测量,基于从3D映射模型环境的光线追踪器获得的数据集。仿真结果表明,定位精度提高95%以上。
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引用次数: 2
A Compact Size Implantable Antenna for Bio-medical Applications 一种用于生物医学的紧凑型植入式天线
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205350
N. Malik, T. Ajmal, P. Sant, M. Rehman
Implantable antennas play a vital role in implantable sensors and medical devices. In this paper, we present the design of a compact size implantable antenna for biomedical applications. The antenna is designed to operate in ISM band at 915 MHz and the overall size of the antenna is $4 times 4 times 0.3 mm ^{3}$. A shorting pin is used to lower the operating frequency of the antenna. For excitation purpose a 50-ohm coaxial probe feed is used in the design. A superstrate layer is placed on the patch to prevent the direct contact between the radiating patch and body tissues. The antenna is simulated in skin layer model. The designed antenna demonstrates a gain of 3.22 dBi while having a -10 dB bandwidth of 240 MHz with good radiation characteristics at 915 MHz. The simulated results show that this antenna is an excellent candidate for implantable applications.
植入式天线在植入式传感器和医疗设备中起着至关重要的作用。在本文中,我们提出了一种紧凑尺寸的生物医学应用植入式天线的设计。天线设计工作在915 MHz的ISM频段,天线的总体尺寸为4 × 4 × 0.3 mm ^{3}$。短引脚用于降低天线的工作频率。为了激励目的,在设计中使用了一个50欧姆的同轴探头馈电。在贴片上放置一层上层,以防止辐射贴片与身体组织直接接触。采用皮肤层模型对天线进行了仿真。设计的天线增益为3.22 dBi,带宽为-10 dB,为240 MHz,在915 MHz时具有良好的辐射特性。仿真结果表明,该天线具有良好的可植入性。
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引用次数: 3
Recurrent Neural Network-based Channel Prediction in mMIMO for Enhanced Performance in Future Wireless Communication 基于递归神经网络的mimo信道预测,提高未来无线通信性能
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205452
Lemayian Joel Poncha, Jehad M. Hamamreh
Massive MIMO (mMIMO) has been classified as one of the high potential future wireless communication technologies due to its unique abilities such as high user capacity, increased spectral density, and diversity. Due to the exponential increase of connected devices, these properties are critical for the current 5G-IoT era and future telecommunication networks. However, outdated channel state information (CSI) causes major performance degradation in mMIMO systems. Nevertheless, channel prediction using neural networks (NN) has gained tremendous attention as a way of mitigating outdated CSI. Hence, combined mMIMO and NN-based channel prediction is a revolutionary technology of future wireless communications. In this work, we review the current recurrent neural network-based (RNN-based) mMIMO channel prediction schemes and propose a low complexity, low cost channel prediction scheme.
大规模MIMO (Massive MIMO, mMIMO)由于其具有高用户容量、更高的频谱密度和多样性等独特能力,被归类为具有高潜力的未来无线通信技术之一。由于连接设备的指数级增长,这些属性对于当前的5G-IoT时代和未来的电信网络至关重要。然而,过时的信道状态信息(CSI)会导致mMIMO系统的主要性能下降。然而,使用神经网络(NN)进行信道预测作为一种缓解过时的CSI的方法已经受到了极大的关注。因此,结合mimo和基于神经网络的信道预测是未来无线通信的一项革命性技术。在这项工作中,我们回顾了目前基于递归神经网络(rnn)的mMIMO信道预测方案,并提出了一种低复杂度、低成本的信道预测方案。
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引用次数: 2
A Novel Approach for Classifying Diabetes’ Patients Based on Imputation and Machine Learning 一种基于归算和机器学习的糖尿病患者分类新方法
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205378
K. Driss, W. Boulila, Amreen Batool, Jawad Ahmad
Since the last decade, many research studies has been conducted on machine learning-based diabetes disease prediction using diagnostic measurement. However, the main challenge in machine learning-based diabetes disease prediction is the preprocessing of data, which contains, in most cases missing values and outliers. For data analytics and accurate prediction, data cleansing is highly desired and recommended. The goal of this study is to predict diabetic patients using realworld datasets. The proposed approach is based on three main steps: cleansing, modelling, and storytelling. In the first step, an imputation process is conducted to remove missing values. Then, k-nearest neighbor’s algorithm is applied to classify patients. To evaluate the performance of the proposed approach, two criteria, namely the F1 score and the Receiver Operating Characteristic (ROC) has been used. F1 score and ROC curve show a clear distinction between diabetic and nondiabetic patients.
近十年来,人们对基于机器学习的糖尿病疾病预测进行了大量的研究。然而,基于机器学习的糖尿病疾病预测的主要挑战是数据的预处理,在大多数情况下,数据包含缺失值和异常值。对于数据分析和准确预测,非常需要并建议进行数据清理。本研究的目的是使用真实世界的数据集来预测糖尿病患者。建议的方法基于三个主要步骤:清理、建模和讲故事。在第一步中,进行插值过程以去除缺失值。然后,应用k近邻算法对患者进行分类。为了评估所提出的方法的性能,使用了两个标准,即F1分数和接收者工作特征(ROC)。F1评分和ROC曲线显示糖尿病与非糖尿病患者有明显差异。
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引用次数: 13
High Precision Laser Ranging Based on STM32 Microcontroller 基于STM32单片机的高精度激光测距
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205377
Zongkang Li, J. Marsh, L. Hou
A miniature portable laser ranging system based on an STM32 microcontroller and VL53L0X time-of-flight laser ranging sensor was developed. An LCD display indicates the real time measured range value. Two working modes with different accuracy and detectable range were designed. These comprise high accuracy and long-distance modes which make the equipment very versatile for real applications. Following code optimization and verification by calipers, the relative measurement error is around 1% – 2% for both modes.
研制了一种基于STM32单片机和VL53L0X飞行时间激光测距传感器的小型便携式激光测距系统。LCD显示显示实时测量范围值。设计了两种不同精度和检测范围的工作模式。这些包括高精度和远距离模式,使设备非常通用的实际应用。经过代码优化和卡尺验证,两种模式的相对测量误差在1% - 2%左右。
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引用次数: 1
期刊
2020 International Conference on UK-China Emerging Technologies (UCET)
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