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A Mobility Based Approach to Strengthen the Network Lifetime ofWireless Sensor Networks in 3D Region 一种基于移动性的方法来增强三维区域无线传感器网络的网络寿命
Q3 Mathematics Pub Date : 2023-12-13 DOI: 10.2174/0122103279255197231020060356
Neha, Jasvinder Kaur
In this era of emerging technologies, Mobile Wireless Sensor Network(MWSN) has emerged as a powerful tool for many applications. Applications such as battlefield andtraffic surveillance, agriculture and environment monitoring, smart homes and smart cities require aspecific protocol to fulfill a specific purpose. WSN is composed of numerous tiny Sensor Nodes(SNs) along with one or more sinks, where sinks have unlimited sources of energy and SNs are battery-operated. SN tasks are to sense the data and transmit it to sink through the formation of dynamictopology. The SNs nearer to the sink rapidly exhaust their energy due to the heavy burden. Due tothis, SNs became dead affecting the performance of the network lifespan. To overcome this problem,the concept of MWSN has been proposed. In MWSN, the sink can move from one location to another,and collect data from SNs. With the help of MWSN, the problem of energy holes can be resolved.An energy hole is a problem in which nodes are alive but they are not able to send the data due tolow energy left. To overcome this problem, MWSN plays an important role. MSWN can movearound the region and collect the data from SNs.In this work, we have proposed a Mobile Sink (MS) that can move on fixed or random locationsfor data collection from SNs. The comparative analysis of various MS strategies such as MSon boundaries, 4 sojourn locations in the region, random position in the region and fixed path to collectthe data has been done.SNs become dead in 2246 rounds in static approach. In the MS boundary approach, all SNsare dead in 2593 rounds. In the sojourn location, it lasts up to 4827. But in MS random and fixed locationapproaches, all SNs are dead in 11568 and 11513 rounds, respectively.The simulation results depict that the MS strategies having fixed or random positions inthe region enhanced the network lifetime 4 to 5 times more than the static sink.
在这个新兴技术的时代,移动无线传感器网络(MWSN)已成为许多应用的有力工具。战场和交通监控、农业和环境监测、智能家居和智能城市等应用需要特定的协议来实现特定的目的。WSN 由无数微小的传感器节点(SN)和一个或多个汇集点组成,汇集点拥有无限的能源,而传感器节点则由电池驱动。传感器节点的任务是感知数据,并通过形成动态拓扑结构将数据传送到汇。由于负担沉重,靠近汇的 SN 很快就会耗尽能量。因此,SN 的死亡会影响网络寿命的性能。为了克服这一问题,人们提出了 MWSN 的概念。在 MWSN 中,Sink 可以从一个地点移动到另一个地点,并从 SN 收集数据。在 MWSN 的帮助下,能量洞问题可以得到解决。能量洞是指节点还活着,但由于能量不足而无法发送数据。为了克服这一问题,MWSN 发挥了重要作用。在这项工作中,我们提出了一种移动 Sink(MS),它可以在固定或随机位置移动,以便从 SN 收集数据。我们对各种 MS 策略进行了比较分析,如在边界上的 MS、区域内的 4 个停留位置、区域内的随机位置以及收集数据的固定路径。在 MS 边界方法中,所有 SN 在 2593 轮中死亡。在巡回定位中,死亡时间长达 4827 轮。仿真结果表明,在区域内采用固定或随机位置的 MS 策略比静态 sink 的网络寿命延长了 4 到 5 倍。
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引用次数: 0
Iterative Filtering PAPR Reduction Method for OFDM Modulation inFifth-Generation Cellular Networks 第五代蜂窝网络中用于 OFDM 调制的迭代滤波 PAPR 降低方法
Q3 Mathematics Pub Date : 2023-12-06 DOI: 10.2174/0122103279261469231019111616
H. Merah, Lahcene Merah, K. Tahkoubit, Larbi Talbi
Orthogonal Frequency Division Multiplexing (OFDM) is anordinarily used waveform in the fifth generation (5G) cellular networks for uplink links. However,there is a prominent disadvantage in the form of a high peak-to-average power ratio (PAPR) whichyields distortion in the timing signal generated at the output of the high-power amplifier (HPA).A new method called Iterative Filtering PAPR Reduction (IFP) has been suggested in thispaper and maintains backward compatibility. The basic concept behind this algorithm is to obtain afilter based on a constant-envelope signal that is intimate to the original signal as far as power is concerned. The constant-envelope signal is then compared to the output between the product of the convolution of the original signal with the filter in question, allowing for the calculation of the impulseresponse of the filter. Such a process can be repeated several times with different filters to realize thebest reduction in PAPR.The simulated results of the IFP method proved better performance in terms of PAPR reduction, Bit Error Rate (BER), and computational complexity requiring two iterations only. We cansee a gain of 3.1dB in terms of PAPR reduction, 17dB in terms of BER, and a factor of 33 times interms of computational complexity compared to the TR method. The Complementary CumulativeComplementary Density Function (CCDF) has assisted in measuring and improving the PAPR performance of the system.The theoretical analysis shows that a single iteration (NF=1) is sufficient, and the simulation results exposed in this paper show a gain of 3.1 dB in PAPR reduction.
正交频分复用(OFDM)是第五代(5G)蜂窝网络中用于上行链路的常用波形。然而,在高功率放大器(HPA)输出处产生的时序信号失真的高峰均功率比(PAPR)形式中存在一个突出的缺点。本文提出了一种新的方法,称为迭代滤波PAPR Reduction (IFP),并保持了向后兼容性。该算法的基本概念是基于与原始信号在功率上接近的恒定包络信号获得滤波器。然后将恒定包络信号与原始信号与所讨论的滤波器的卷积积之间的输出进行比较,从而计算滤波器的脉冲响应。这样的过程可以用不同的过滤器重复几次,以实现最佳的减少PAPR。仿真结果表明,IFP方法在PAPR降低、误码率(BER)和计算复杂度(只需两次迭代)方面具有更好的性能。我们可以看到,与TR方法相比,PAPR降低了3.1dB, BER降低了17dB,计算复杂度提高了33倍。互补累积互补密度函数(CCDF)有助于测量和改善系统的PAPR性能。理论分析表明,单次迭代(NF=1)就足够了,本文的仿真结果表明,PAPR降低的增益为3.1 dB。
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引用次数: 0
Multi-Objective Stochastic Gradient Based ADR Mechanism for Throughput and Latency Optimization in LoRaWAN 基于随机梯度的多目标 ADR 机制,用于优化 LoRaWAN 的吞吐量和延迟
Q3 Mathematics Pub Date : 2023-11-17 DOI: 10.2174/0122103279272388231026062241
Swathika R, S. M. D. Kumar
In Long Range Wide Area Networks (LoRaWAN), the goal of Adaptive Data Rate (ADR) is to allocate resources to End Devices (ED) like Transmission Power (TP) and Spreading Factor (SF). The EDs are designed in a way that they can choose optimal configuration resource parameters from a set of LoRa physical layer parameters. The SF parameter has to be chosen correctly, as an incorrect one may cause collisions and interference if multiple nodes have the same SF. This paper focuses on throughput and latency optimization using an effective ADR mechanism for LoRaWAN-based IoT networks. The objective of this study is to maximize the total throughput. SF should be used by multiple nodes as it will have less Time on Air (ToA), but it may cause collision, contention, and co-spreading factor interference problems. The idea is to find an optimal SF allocation to end devices and the optimal number of total devices using the same SF to avoid collision and interference. This paper proposes a multi-objective stochastic gradient descent method to solve the constrained optimization problem for optimizing throughput and latency. This work compares throughput and latency results for the static, quasi-static, and dynamic environments. Trade-offs between latency and throughput for the simulated scenarios are also presented. The simulation results show that the throughput obtained using this technique is higher than the naive ADR approach and the existing gradient descent methods.
在长距离广域网(LoRaWAN)中,自适应数据速率(ADR)的目标是为终端设备(ED)分配资源,如传输功率(TP)和扩展因子(SF)。ED 的设计方式使其能够从一组 LoRa 物理层参数中选择最佳配置资源参数。SF 参数必须选择正确,因为如果多个节点具有相同的 SF,不正确的 SF 参数可能会导致碰撞和干扰。本文重点研究基于 LoRaWAN 的物联网网络如何利用有效的 ADR 机制优化吞吐量和延迟。 本研究的目标是最大化总吞吐量。SF 应由多个节点使用,因为它的通话时间(ToA)更短,但它可能会导致碰撞、争用和共播因子干扰问题。我们的想法是找到终端设备的最佳 SF 分配和使用同一 SF 的总设备数,以避免碰撞和干扰。 本文提出了一种多目标随机梯度下降法来解决约束优化问题,以优化吞吐量和延迟。 这项工作比较了静态、准静态和动态环境下的吞吐量和延迟结果。还介绍了模拟场景中延迟和吞吐量之间的权衡。 仿真结果表明,使用该技术获得的吞吐量高于简单的 ADR 方法和现有的梯度下降方法。
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引用次数: 0
Bandwidth-enhanced FSS-loaded Semi-Circular Patch Antenna for C-band Applications 用于 C 波段应用的带宽增强型 FSS 加载半圆形贴片天线
Q3 Mathematics Pub Date : 2023-11-17 DOI: 10.2174/0122103279267837231025113117
U. Akash, Sujith Rajan B, Kavya M Surapuramath, Manas Badanikai, Varun D
This study aimed to develop and analyse a bandwidth-enhanced C band antenna loaded with EBG and FSS Structures to improve the antenna performance. This paper illustrates the design of a semi-circular microstrip antenna with a modified circular ring Frequency Selective Surface (FSS) and an Electromagnetic Band Gap (EBG) structure for improved bandwidth and an omnidirectional pattern. The patch antenna is aimed at C-Band intersatellite communication links in a constellation. In literature, the application of EBG and FSS together is seldom used. The semicircular patch is aimed at retaining the omnidirectional antenna pattern at higher frequencies, as well as bandwidth, which is achieved through FSS and EBG structures. The modeling and simulation of the antenna have been carried out with 3D EM solvers. The simulated patch antenna operates in a wideband ranging from 4.1 GHz to 7.1 GHz with a gain of 1.9 dB at 5.33 GHz and 1.4 dB at 4.5 GHz. The proposed antenna design is vertically polarized. The simulation results are validated with measurement results. From the results obtained it is found that the antenna has broadband resonance from 4.04 GHz to 7.1 GHz with a nominal gain of 1.949 dB at 5.33 GHz and 1.433 dB at 4.5 GHz and impedance bandwidth of 78.4% (3.136 GHz).
本研究旨在开发和分析一种加载了 EBG 和 FSS 结构的带宽增强型 C 波段天线,以提高天线性能。 本文阐述了一种半圆形微带天线的设计,该天线具有改进的环形频率选择表面(FSS)和电磁带隙(EBG)结构,可提高带宽和全向模式。该贴片天线主要用于星座中的 C 波段卫星间通信链路。 在文献中,很少将 EBG 和 FSS 结合使用。半圆形贴片旨在保留较高频率下的全向天线图案以及带宽,而这是通过 FSS 和 EBG 结构实现的。天线的建模和仿真是通过三维电磁求解器进行的。仿真的贴片天线工作在 4.1 GHz 至 7.1 GHz 的宽带范围内,在 5.33 GHz 时增益为 1.9 dB,在 4.5 GHz 时增益为 1.4 dB。 拟议的天线设计为垂直极化。仿真结果与测量结果进行了验证。 从获得的结果可以发现,该天线在 4.04 GHz 至 7.1 GHz 范围内具有宽带谐振,在 5.33 GHz 和 4.5 GHz 的额定增益分别为 1.949 dB 和 1.433 dB,阻抗带宽分别为 78.4% (3.136 GHz)。
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引用次数: 0
Future Intelligent Communication with 6G Technology: A Review 基于6G技术的未来智能通信研究综述
Q3 Mathematics Pub Date : 2023-11-03 DOI: 10.2174/0122103279270825231023095946
Sharad Jain, Ashwani Kumar Yadav, Raj Kumar, Vaishali Yadav, Dilbag Singh
Abstract: With the exponentially increasing demand for wireless technology in the last few years, fifth-generation (5G) technology is in service at many places and soon will be deployed worldwide. But it might be complicated to address the escalating need for Internet of Things (IoT) connections using the conventional capabilities henceforward, so the proposal of a sixth generation (6G) communication network was introduced to upgrade the ongoing 5G networks and support to develop smart services additionally. The unexpected Internet of Everything applications having incredibly broad and complex needs are projected to be supported by 6G. With this, researchers in academics and industries have started research and development for 6G wireless network. 6G with artificial intelligence support is planned to be introduced, with new dimensions between 2027 and 2030. The future of 6G technology is bright and vibrant; however, there are yet several obstacles in the way of implementing 6G networks like capacity of system, reliability, security, latency, data rate, high energy efficiency, ever-present intelligent connectivity, and recent theories. In this paper, various 6Genabled technologies are discussed like artificial intelligence, terahertz communications, wireless optical, free-space optical, backhaul network, and block chain along with associated challenges. We showcase the foundation of 6G in detail, the performance of the 6G network, and key enabling technologies that can upgrade the future of the smart world. The bibliometric analysis of recent research on 6G networks and related applications is also achieved. Finally, we illustrate key open research challenges and possible future directions toward the realization of 6G-enabled technologies.
摘要:随着近几年对无线技术的需求呈指数级增长,第五代(5G)技术已经在许多地方投入使用,并将很快在全球范围内部署。但是,使用传统功能来解决不断升级的物联网(IoT)连接需求可能会很复杂,因此提出了第六代(6G)通信网络的建议,以升级正在进行的5G网络并支持开发额外的智能服务。预计6G将支持意想不到的、有着极其广泛和复杂需求的万物互联应用。因此,学术界和产业界的研究人员开始了对6G无线网络的研究和开发。计划引入人工智能支持的6G, 2027年至2030年之间将出现新的维度。6G技术的未来是光明而充满活力的;然而,在实施6G网络的过程中还存在一些障碍,如系统容量、可靠性、安全性、延迟、数据速率、高能效、始终存在的智能连接以及最新的理论。本文讨论了人工智能、太赫兹通信、无线光学、自由空间光学、回程网络和区块链等各种6Genabled技术以及相关挑战。我们将详细展示6G的基础、6G网络的性能以及可以升级未来智能世界的关键使能技术。对6G网络及相关应用的最新研究进行了文献计量分析。最后,我们阐述了关键的开放研究挑战和实现6g支持技术的可能未来方向。
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引用次数: 0
Automated Patient Activity Identification in Cyber-Physical Systems Using A Unique Deep Learning Approach and Multi-Objective Optimization 在网络物理系统中使用独特的深度学习方法和多目标优化的自动患者活动识别
Q3 Mathematics Pub Date : 2023-10-27 DOI: 10.2174/0122103279274650231010053723
Gaikwad Rama Bhagwatrao, Ramanathan Lakshmanan
Aims and Background: For video understanding and analysis, human activity recognition (HAR) has emerged as a challenging field to investigate and implement. Patients can be monitored in real-time by a group of healthy individuals, and abnormal behaviors can be used to identify them later. Patients who do not engage in customary physical activities are more likely to suffer from stress, cardiovascular disease, diabetes, and musculoskeletal disorders. Thus, it is critical to collect, evaluate, and analyze data to determine their activities. Objectives and Methodology: Deep learning-based convolutional neural networks (CNNs) can be used to solve the problem of patient activities in the healthcare system by identifying the most efficient healthcare providers. Healthcare relies heavily on the integration of medical devices into cyberphysical systems (CPS). Hospitals are progressively employing these technologies to maintain a high standard of patient care. The CNN-CPS technique can be used by a healthcare organization to examine a patient's medical history, symptoms, and tests to provide personalized care. A network of medical devices must be integrated into healthcare. Hospitals are increasingly using these technologies to ensure that patients get the best possible care at all times. Healthcare automation can dramatically improve quality and consistency by reducing human errors and fatigue. The multiobjective optimization is achieved considering various factors like the time required to find emergency case identification, new disease prediction, and accuracy of data protection. Results: Consequently, patients are assured of receiving a consistent, attentive service at every visit. Data and orders can be stored and entered more easily via automation, market research suggests. The outcome of this article is obtained based on a comparison of various approaches in health monitoring systems, such as collection of patient data is 82.3%, new disease prediction is 80.14%, emergency case identification is 78.25%, data protection is 81.35%, immune to impersonation attack reduction is 78.36% and overall accuracy of data protection and transmission performance is 86.24% is achieved. Conclusion: Compared with existing methods DM-CC and HE-WSN for health monitoring and patient’s treatment process, the proposed method CNN-CPS is better in maintaining the data and proper information passed to the medical care is 92.56%. result: Consequently, patients are assured of receiving consistent, attentive service at every visit. Data and orders can be stored and entered more easily via automation, market research suggests. The outcome of this article is obtained based on a comparison of various approaches in health monitoring systems as Collection of patient’s data is 82.3%, new disease prediction is 80.14%, emergency case identification is 78.25%, Data protection is 81.35%, immune to impersonation attack reduction is 78.36% and overall accuracy of data protection and transm
目的和背景:对于视频理解和分析,人类活动识别(HAR)已经成为一个具有挑战性的研究和实施领域。病人可以被一群健康的人实时监测,异常行为可以用来识别他们。不从事常规体育活动的患者更容易患压力、心血管疾病、糖尿病和肌肉骨骼疾病。因此,收集、评估和分析数据以确定它们的活动是至关重要的。目标和方法:基于深度学习的卷积神经网络(cnn)可以通过识别最有效的医疗保健提供者来解决医疗保健系统中患者活动的问题。医疗保健严重依赖于将医疗设备集成到网络物理系统(CPS)中。医院正逐步采用这些技术来维持高水平的病人护理。CNN-CPS技术可以被医疗机构用来检查病人的病史、症状和测试,以提供个性化的护理。医疗设备网络必须集成到医疗保健中。医院越来越多地使用这些技术来确保患者在任何时候都能得到最好的护理。医疗保健自动化可以通过减少人为错误和疲劳来显著提高质量和一致性。考虑到发现紧急病例识别所需的时间、新疾病预测和数据保护的准确性等多种因素,实现了多目标优化。结果:因此,患者在每次就诊时都能得到一致、周到的服务。市场研究表明,通过自动化,数据和订单可以更容易地存储和输入。本文的结果是通过对健康监测系统中各种方法的比较得出的,如患者数据收集率为82.3%,新疾病预测率为80.14%,急诊病例识别率为78.25%,数据保护率为81.35%,免疫冒充攻击降低率为78.36%,数据保护和传输性能的总体准确性为86.24%。结论:与现有用于健康监测和患者治疗过程的DM-CC和hew - wsn方法相比,本文提出的CNN-CPS方法在数据维护和正确信息传递给医护人员方面具有更好的效果,准确率为92.56%。结果:因此,患者在每次就诊时都能得到一致、周到的服务。市场研究表明,通过自动化,数据和订单可以更容易地存储和输入。通过对健康监测系统中各种方法的比较,得出患者数据收集率为82.3%,新疾病预测率为80.14%,急诊病例识别率为78.25%,数据保护率为81.35%,抗冒充攻击降低率为78.36%,数据保护和传输性能的总体准确率为86.24%。结论:与现有用于健康监测和患者治疗过程的DM-CC和hew - wsn方法相比,本文提出的CNN-CPS方法能更好地保持数据的准确性和传递给医疗的信息的准确性为92.56%。
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引用次数: 0
A Study on Underwater Image Processing Techniques 水下图像处理技术研究
Q3 Mathematics Pub Date : 2023-10-27 DOI: 10.2174/0122103279259455231019092856
Nishant Choudhary, Neha Goel, Ravindra Kumar Yadav
Abstract: In recent years, a potential interest has been developed in exploring and enhancing the quality of underwater images. The captured underwater images often experience scattering and high levels of noise due to the properties of light transit within the water and the biotic movement that occurs inside the ocean bottom. Underwater cameras or devices were fitted inside the unmanned underwater vehicles (UUVs), autonomous underwater vehicles (AUVs), remotely operated vehicles (ROVs), ocean detector networks, etc to see the ocean bottom. Despite being a crucial detector for keeping an eye on underwater landscapes, modern underwater camera sensors or detectors contain a number of problems. Numerous solutions to the issues with conventional underwater photography have been put out during the last five years. With the help of the number of contributions and difficulties reported by more than 40 researchers in their research article, this study focused to mention the current underwater image processing methods. This article represents an overview of numerous underwater image-processing techniques utilized, including underwater picture de-scattering, underwater image colour refurbishment, and underwater image aspect evaluations. Also, the latest trends, problems, and challenges for creating and processing underwater image sensors were discussed. objective: analysis of underwater image processing using numerous techniques method: The two kinds of underwater picture de-scattering techniques—hardware-based and software-based—are initially reviewed in this work. Then, we list four common techniques for restoring the colour of underwater images. We then discuss reference-based indexes and non-reference indexes, two techniques for evaluating the quality of underwater images. We conclude by summarising this essay and discussing potential directions for this area. result: Experimental Results of Fluorescence Imaging Underwater Polarization Imaging Experimental Results of Traditional Physical Model-based Methods. Experimental Results of Traditional Non-physical Model-based Methods. Experimental Results of Color Restoration Methods conclusion: We provided a thorough analysis of underwater image processing in this study. According to the different imaging kinds, we separated the underwater image processing techniques into two groups. The two courses' cutting-edge methods were thoroughly debated and critiqued. The wavelength compensation technique, including physical model, non-physical model, and colour reconstruction approach are presented for software-based underwater image processing. Finally, a summary of future trends and quality evaluation techniques is provided
摘要:近年来,探索和提高水下图像质量已成为一个潜在的兴趣。由于光在水中传输的特性和海底发生的生物运动,捕获的水下图像经常经历散射和高水平的噪声。水下摄像机或设备被安装在无人水下航行器(uuv)、自主水下航行器(auv)、遥控航行器(rov)、海洋探测器网络等内部,以观察海底。尽管作为监视水下景观的关键探测器,现代水下相机传感器或探测器存在许多问题。在过去的五年中,人们提出了许多解决传统水下摄影问题的方法。本研究借助40多位研究者在其研究文章中报道的贡献数量和难点,重点提及目前的水下图像处理方法。本文概述了许多水下图像处理技术的应用,包括水下图像去散射、水下图像色彩翻新和水下图像方面的评估。讨论了水下图像传感器的最新发展趋势、存在的问题和面临的挑战。目的:分析水下图像处理的多种技术方法。本文对水下图像去散射的两种技术——基于硬件和基于软件进行了初步的综述。然后,我们列出了恢复水下图像颜色的四种常用技术。然后讨论了基于参考指标和非参考指标这两种评价水下图像质量的技术。最后,我们总结了本文并讨论了该领域的潜在方向。基于传统物理模型的水下偏振成像方法实验结果传统非物理模型方法的实验结果。结论:在本研究中,我们对水下图像处理进行了深入的分析。根据不同的成像类型,我们将水下图像处理技术分为两类。这两门课程的前沿方法受到了彻底的辩论和批评。提出了基于软件的水下图像处理的波长补偿技术,包括物理模型、非物理模型和颜色重建方法。最后,对未来的发展趋势和质量评价技术进行了总结
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引用次数: 0
Swarm Algorithm-based Power Optimization in Cooperative Communication Network 基于群算法的协同通信网络功率优化
Q3 Mathematics Pub Date : 2023-10-20 DOI: 10.2174/0122103279260104230929103737
Sonika Pahuja, Poonam Jindal
Background: Due to the environmental effects, the signal fades abruptly and is sometimes lost in the transmission path, which results in weak signal reception at the destination node. The Cooperative Communication Network (CCN) overcomes this problem and provides better spectral efficiency. The source node and the helper node both send the information to the receiver. In spite of many advantages, there are some limitations to such networks. Improving the system efficiency by power, energy, or relay selection optimization is quite desirable as multiple helper nodes are used in the network. Considering this crucial requirement of optimization, the proposed work presents optimal power allocation of the system. Methods: Here, tunicate-swarm optimization is implemented to improve the system parameters, symbol error rate (SER), outage probability, and bit error rate (BER). Two relaying protocols are used for analysis, i.e., Amplify-and-Forward (AF) and Differential AF (Diff-AF), with two combining schemes: Selection-Combining (SC) and Maximal-Ratio-Combining (MRC). Results: The results obtained are further compared with other metaheuristics algorithms, such as Particle-Swarm-Algorithm (PSO), Black-Widow-Optimization (BWO), and the traditional method of Equal-Power-Allocation (EPA). Conclusion: The simulation result shows that the proposed algorithm improves the system parameters compared to algorithms with less time.
背景:由于环境的影响,信号在传输路径中会突然消失,有时会丢失,导致目的节点接收到的信号较弱。协作通信网络(CCN)克服了这一问题,提供了更好的频谱效率。源节点和helper节点都将信息发送给接收者。尽管有许多优点,但这种网络也有一些局限性。由于网络中使用了多个辅助节点,因此通过功率、能量或中继选择优化来提高系统效率是非常可取的。考虑到这一关键的优化要求,所提出的工作提出了系统的最优功率分配。方法:采用被膜群优化方法提高系统参数、符号错误率、中断概率和误码率。分析采用两种中继协议,即放大转发协议(AF)和差分AF协议(difff -AF),并采用两种组合方案:选择组合(SC)和最大比例组合(MRC)。结果:将所得结果与粒子群算法(PSO)、黑寡妇优化算法(BWO)和传统的等功率分配方法(EPA)等元启发式算法进行了比较。结论:仿真结果表明,所提算法相对于时间更短的算法,提高了系统参数。
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引用次数: 0
Knowledge Mapping of Human Activity Recognition Techniques for Assistive Living (A Systematic Review) 辅助生活人类活动识别技术的知识图谱(系统综述)
Q3 Mathematics Pub Date : 2023-09-11 DOI: 10.2174/2210327913666230911113149
Preeti Agarwal, Mansaf Alam
Purpose: Human Activity Recognition (HAR) is a subject of research that identifies an individual’s activities for assistive living. The proliferation of ICT and sensor technology prompted HAR to flourish beyond unfathomable levels, having immense human-centric applications. The development of accurate HAR systems involves complex statistical and computational tasks from signal acquisition to activity classification. This research aims to conduct a systematic review of recent techniques proposed for each stage of HAR application development. Methodology: The review is conducted following Kitchenham principles, using Scopus and Web of Science databases. Firstly, research questions were formulated, followed by the search strategy definition. Based on assessment criteria, 193 papers are shortlisted and thoroughly analyzed to extract research-related information. Results: The techniques identified in 193 articles are comprehensively mapped from four aspects: data acquisition, data preprocessing and feature engineering, learning algorithm, and evaluation. Each technique is examined for its strengths and limitations to assist application developers in selecting the best one for their needs. The prevailing challenges and upcoming research opportunities are thoroughly explored. Conclusion: The ever-expanding literature in the field necessitated an update to the status of HAR literature. Compared to other reviews that focused on specific methods, fields of application, and datatypes, to the best of our understanding, this is the first evaluation of its kind that provides a broader mapping of HAR approaches. The findings of this analysis will provide researchers and newcomers in the field an up-to-date and holistic view of the complete body of work in this area.
目的:人类活动识别(HAR)是一门研究识别辅助生活的个人活动的学科。信息通信技术和传感器技术的扩散促使HAR蓬勃发展到不可思议的水平,具有巨大的以人为中心的应用。精确HAR系统的开发涉及复杂的统计和计算任务,从信号采集到活动分类。本研究旨在对HAR应用开发的每个阶段提出的最新技术进行系统回顾。方法:本综述遵循Kitchenham原则,使用Scopus和Web of Science数据库。首先制定研究问题,然后定义搜索策略。根据评估标准,193篇论文入围,并进行深入分析,以提取与研究相关的信息。结果:从数据采集、数据预处理和特征工程、学习算法和评估四个方面全面映射了193篇文章中识别的技术。对每种技术的优点和局限性进行了研究,以帮助应用程序开发人员选择最适合他们需要的技术。深入探讨了当前的挑战和即将到来的研究机会。结论:该领域的文献不断扩大,需要更新HAR文献的地位。与其他侧重于特定方法、应用领域和数据类型的评论相比,据我们所知,这是第一次提供更广泛的HAR方法映射的此类评估。这一分析的结果将为该领域的研究人员和新手提供一个最新的、全面的观点,以了解该领域的全部工作。
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引用次数: 0
2.4 GHz Compact Textile Antenna for Body Wear Application and Monitoring of Health Parameters 用于人体磨损应用和健康参数监测的2.4 GHz紧凑型纺织天线
Q3 Mathematics Pub Date : 2023-08-25 DOI: 10.2174/2210327913666230825143456
A. Ghodake, B. Hogade
This paper has described a textile-based body-worn antenna. When compared to standard flat and stiff antennas and circuits, this technology delivers superior mechanical and radio frequency performance. Textile antennas have several advantages, including small size, lightweight, ease of fabrication, and low cost. As a result of these advantages, textile antennas are gaining popularity these days.There are different applications of textile antennas, but the main application or aim is to wear them comfortably and observe different body signals for analysis of different health parameters, like temperature, heart rate, blood pressure, etc., as the compactness of the antenna bending losses is less.In the design of an antenna, jeans fabric is employed as the substrate because this material is sturdy, stiff, of little density, accessible, and inexpensive with electromagnetic properties ℇr = 1.6 and tan ẟ = 0.01, and copper is used for the conducting patch and ground.This antenna operates in the industrial, scientific, and medical radio (ISM) band at 2.4 GHz with patch dimensions of 25 x 20 mm, making it proper for body-worn purposes. Because the antenna is so small, it can be readily mounted on an arm for health parameter monitoring with minimal bending. In sweaty conditions, it also operates in the ISM band.The simulation, fabrication, and body wear results are all included in the results section. As a result, these novel fibre antennas are useful to incorporate into shirts and coats for easy health monitoring with minimum loss.
本文描述了一种基于织物的体戴天线。与标准的平面和刚性天线和电路相比,该技术提供了卓越的机械和射频性能。纺织天线具有体积小、重量轻、易于制造和成本低等优点。由于这些优点,纺织天线最近越来越受欢迎。纺织天线有不同的应用,但主要的应用或目的是佩戴舒适,观察不同的身体信号,分析不同的健康参数,如体温、心率、血压等,因为天线的紧凑性弯曲损失较小。在天线的设计中,采用牛仔裤织物作为衬底,因为这种材料坚固,坚硬,密度小,易于获取,价格低廉,电磁性能ℇr = 1.6, tan ẟ = 0.01,铜用于导电片和接地。该天线工作在2.4 GHz的工业、科学和医疗无线电(ISM)频段,贴片尺寸为25 x 20 mm,适合人体佩戴。由于天线非常小,它可以很容易地安装在手臂上,以最小的弯曲进行健康参数监测。在出汗的情况下,它也在ISM波段工作。仿真、制造和车身磨损结果都包含在结果部分。因此,这些新型的光纤天线可以用于衬衫和外套,以最小的损失方便地进行健康监测。
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引用次数: 0
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International Journal of Sensors, Wireless Communications and Control
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