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Performance Analysis of MIMO-OFDM System Based on SVD scheme under multi path selective fading channel 基于SVD方案的MIMO-OFDM系统在多径选择性衰落信道下的性能分析
Q4 Computer Science Pub Date : 2019-09-01 DOI: 10.5875/AUSMT.V9I3.2049
B. Ali
We consider in this paper a MIMO-OFDM wireless communication system based on pre-coding and SVD techniques, which the system has the feedback of CSI to the transmitted side. The multi path channel, delay spread, Rayleigh fading and channel noise are assumed in the simulation of the proposed system. The zero forcing method is applied for detection the data received. The goal of our study is to evaluate the BER performance and see it with different case. The BER resulted shows the improvement by using the SVD decomposition for the associated system of MIMO-OFDM. Particularly in the complex conditions of wireless channel where we considered ten paths for propagation the signals between transmitter and receiver sides. And also the contribution is appeared when the system studied keeps a good BER performance when the data rate is increased by using more transmit antenna. As we evaluated the BER of MIMO-OFDM system done for various sub-carriers and in two guard interval lengths for the OFDM system
本文考虑了一种基于预编码和SVD技术的MIMO-OFDM无线通信系统,该系统将CSI反馈到发射侧。仿真中假设了多径信道、延迟扩展、瑞利衰落和信道噪声。强制归零方法用于检测接收到的数据。我们研究的目标是评估BER性能,并在不同的情况下进行观察。结果表明,在MIMO-OFDM相关系统中,使用SVD分解可以提高误码率。特别是在无线信道的复杂条件下,我们考虑了在发射机和接收机之间传播信号的十条路径。当使用更多的发射天线来提高数据速率时,当所研究的系统保持良好的误码率性能时,也会出现这种贡献。我们评估了MIMO-OFDM系统在不同子载波和两个保护间隔长度下的误码率
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引用次数: 0
Ethical Guidelines for Artificial Intelligence (AI) Development and the New “Trust” Between Humans and Machines 人工智能发展的伦理准则与人与机器之间的新“信任”
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.2178
Po-Jung Shih
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引用次数: 1
Intelligent Model for Improving the Capacity of Wireless Adhoc Network 提高无线自组网容量的智能模型
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.1707
Suresh Kurumbanshi
In Ad-Hoc network, devices make connection in the network through wireless medium. In these networks, each device have a unique IP address and it helps in identification of nodes for routing. Routing becomes difficult when the location of node changes. The IP address of every node should be updated, and there is a requirement of complex protocols to handle such changes. The challenges of IP addresses are many. In such wireless networks, connection is to be re-established with different IP address when a node moves from one access point to another .This will increase the latency of the network and provides interruption in service. This problem can be solved using mobile IP. It will maintain the same IP address even if the host node changes location .Hence it provides continuous connectivity in the network. In our proposed network, packets have been distributed using probabilistic approach i.e.pareto for grid and random topology & performance of the network is improved for DSR Routing protocol.
在Ad-Hoc网络中,设备通过无线媒介在网络中进行连接。在这些网络中,每个设备都有一个唯一的IP地址,这有助于识别路由节点。当节点位置发生变化时,路由变得困难。每个节点的IP地址都需要更新,需要复杂的协议来处理这种变化。IP地址的挑战有很多。在这种无线网络中,当一个节点从一个接入点移动到另一个接入点时,需要用不同的IP地址重新建立连接,这将增加网络的延迟,并造成服务中断。这个问题可以通过移动IP解决。即使主机节点改变了位置,它也会保持相同的IP地址,因此它在网络中提供了连续的连接。在我们所提出的网络中,数据包使用概率方法,即帕累托网格和随机拓扑进行分布,并通过DSR路由协议提高了网络的性能。
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引用次数: 1
A NEW SLIDING MODE CONTROLLER IMPLEMENTATION ON AN AUTONOMOUS QUADCOPTER SYSTEM 一种新型滑模控制器在自主四轴飞行器系统上的实现
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.1876
Jayson Piquero, Vincent Kyle Delica, Alfred Loue Orquia, Eloise Margarett Reynaldo, J. Ilao, M. A. Roque, E. Sybingco, A. Chua, J. Katupitya, H. Jayakody
This paper introduces Sliding Mode controller, a non-linear controller, for the implementation of an autonomous quadrotor platform, a non-linear system. The Sliding Mode controller was applied to a PixHawk Flight Controller using the Ardupilot firmware. The simulation testing using SITL shows the effectiveness of the controller before flight. The results imply the improvement when using Sliding Mode Control in comparison to PID controller. The results show that there is a reduction in attitude error when using Sliding Mode Control in comparison with PID control in all simulation and actual hardware results. The robustness of Sliding Mode Control was also tested by adding parameter uncertainties and disturbances to the system. In this study, the root-mean-square error obtained in the Sliding Mode Control is 1.546580%, 0.634243%, and 13.466256% for the roll, pitch, and yaw movements respectively, and the root-mean-square error obtained in the PID control is 2.588324%, 4.553838%, and 18.860183% for the roll, pitch, and yaw movements respectively. This shows that the quadrotor using Sliding Mode Control is less prone to attitude errors.
本文介绍了一种非线性控制器——滑模控制器,用于实现自主四旋翼平台这一非线性系统。滑模控制器应用于使用Ardupilot固件的PixHawk飞行控制器。通过仿真测试,验证了该控制器在飞行前的有效性。结果表明,与PID控制相比,采用滑模控制可以改善系统的性能。结果表明,与PID控制相比,采用滑模控制能有效地减小姿态误差。通过在系统中加入参数不确定性和干扰,验证了滑模控制的鲁棒性。在本研究中,滑模控制的横摇、俯仰和偏航运动的均方根误差分别为1.546580%、0.634243%和13.466256%,PID控制的横摇、俯仰和偏航运动的均方根误差分别为2.588324%、4.553838%和18.860183%。这表明,四旋翼使用滑模控制是不容易出现姿态误差。
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引用次数: 7
Hydraulic Servo System Control Using Differential Evolution Based Robust Structure Specified H∞ Controller 基于微分进化的鲁棒结构指定H∞控制器在液压伺服系统控制中的应用
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.1906
D. Maneetham
Synthesis of an H∞ controller usually produces a very high order of controller, and one which is much higher than the plant, causing difficulty in implementing the controller in practical applications, especially those using small microcontrollers. However, systems are always subject to disturbances and un-modeled dynamics. This research introduces modeling and simulations of lower order structures, specifically an H∞ robust controller, to control a hydraulic servo system. A low order controller shortens the gap between the complicated H∞ controllers to the practical embedded control system application. Simulation results show that the proposed controller gives satisfactory results with small settling times and no steady state error. The resulting controller also produced better responses than that of a full order H∞ controller generated using the Matlab Robust Control Toolbox.
H∞控制器的综合通常会产生非常高阶的控制器,并且其阶数远高于对象,这导致控制器在实际应用中难以实现,尤其是在使用小型微控制器的应用中。然而,系统总是受到扰动和未建模的动力学的影响。本文介绍了用于控制液压伺服系统的低阶结构,特别是H∞鲁棒控制器的建模和仿真。低阶控制器缩短了复杂H∞控制器与实际嵌入式控制系统应用之间的差距。仿真结果表明,该控制器具有稳定时间小、无稳态误差等优点,取得了满意的控制效果。所得到的控制器也比使用Matlab鲁棒控制工具箱生成的全阶H∞控制器产生更好的响应。
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引用次数: 0
An Efficient Technique for Double Faults Detection and their Locations Identification in Digital Microfluidic Biochip 一种有效的数字微流控生物芯片双故障检测及位置识别技术
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.1889
A. Saha, M. Majumder
Progress of digital microfluidic biochip (DMFB) confronts for the defective and specious electrodes. Not only these hinder the routing of droplets but also the completion time of assay is influenced by those defective electrodes. As Microfluidic-based biochips are broadly used in the revolution of medical diagnosis, gigantic parallel DNA analysis, automatic drug discovery and real-time biomolecular recognition including numerous safety-critical applications, this biochip definitely responsible for appropriate and accurate result. Prior accepting it for perceptive purposes the microfluidic biochip must confirm its precision and robustness. In this article, an aspect of fast fault diagnosis appliance for perceiving double faults and recognizing the fault locations within the biochip is introduced. If the biochip is defect free then the proposed approach computes the traversal time as well. The suggested result outpoured that the propound technique is competent, efficacious as well as delineate signifying improvement over the surviving method. Furthermore this paper added expedient reconfiguration contrivance.
数字微流控生物芯片(DMFB)的发展面临着电极缺陷和似是而非的问题。这些缺陷不仅阻碍了液滴的流动,而且还影响了测定的完成时间。由于基于微流控技术的生物芯片广泛应用于医学诊断革命,巨大的并行DNA分析,自动药物发现和实时生物分子识别,包括许多安全关键应用,这种生物芯片绝对负责适当和准确的结果。在将其用于感知目的之前,微流控生物芯片必须确认其精度和鲁棒性。本文介绍了一种快速故障诊断装置,用于生物芯片内部的双故障感知和故障位置识别。如果所述生物芯片无缺陷,则所提出的方法也计算遍历时间。建议结果表明,该方法是有效的,而且比现存方法有明显的改进。此外,本文还增加了权宜之计的重构方法。
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引用次数: 2
A Novel Design of an Automation System for an Energy-Efficient Polygeneration Plant 一种新型高效多联产装置自动化系统的设计
Q4 Computer Science Pub Date : 2019-06-01 DOI: 10.5875/AUSMT.V9I2.1895
Vince William Carandang, Aaron Jules R. Del Rosario, Julius Ezra M. Gundran, A. Chua
Polygeneration plants are a leading means of increasing the efficiency and reducing the environmental impact of energy conversion. This study addresses the lack of studies on automation and control of systems that produce electricity, heating, cooling, and potable water. Mixed integer linear programming (MILP) optimization of the annualized total cost is used to select and size the plant components. The final layout consists of solar photovoltaic (PV) and thermal, an absorption chiller and a multi-effect desalination for electricity, heating, cooling and water, respectively. As auxiliary sources, boiler, gas turbine and grid connection are present. Storage units for electricity, heating, and water are also included in the proposed layout. The control and automation system are implemented using ladder logic. Sufficient supply, efficient resource use, and financial gain are considered in the control scheme design. Applying the methodology to a mixed industrial, commercial and residential zone in Southern Luzon, Philippines, the simulation results show successful implementation of all control scenarios. Economic analysis on the hourly cash flows of the system on a typical day show significant daily savings that outweigh the investment cost of the proposed control and automation system with monthly savings of ₱25,112.40 and payback period of 0.4 years.
多联产电厂是提高能源转换效率和减少对环境影响的主要手段。这项研究解决了缺乏对发电、供暖、制冷和饮用水系统自动化和控制的研究。年化总成本的混合整数线性规划(MILP)优化用于选择和确定工厂组件的大小。最终布局包括太阳能光伏(PV)和热能、吸收式制冷机和多效脱盐,分别用于电力、供暖、制冷和水。锅炉、燃气轮机和电网连接是辅助电源。拟建布局中还包括电力、供暖和水的存储单元。控制和自动化系统使用梯形逻辑实现。在控制方案设计中考虑了充足的供应、有效的资源利用和财务收益。将该方法应用于菲律宾吕宋岛南部的一个工业、商业和住宅混合区,模拟结果表明所有控制方案都得到了成功实施。对系统典型一天每小时现金流的经济分析显示,每天节省的费用显著超过了拟议控制和自动化系统的投资成本,每月节省的费用为₱25112.40,回收期为0.4年。
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引用次数: 0
Concept Development and Design of Self-Transfer Devices for Wheelchair Users 轮椅使用者自我转移装置的概念发展与设计
Q4 Computer Science Pub Date : 2019-03-01 DOI: 10.5875/AUSMT.V9I1.1621
R. Krishnan, S. Pugazhenthi
Movement disability not only affects mobility but also affects other daily activities of a person with disability which includes accessing toilet, moving to a chair, etc. A wide variety of mobility assistive devices are commercially available but, the devices that enable self-transfer of a wheelchair user from one surface to another, specifically addressing transfer to a toilet commode, is the need of the hour. In order to develop a manual and a powered self-transfer device, a methodical search of the entire solution space has been made by constructing a concept classification tree to decide on the choice of transfer posture, sequence of transfer motion, actuators, mechanisms and power source. Prior to this decision making, the procedure adopted for transferring a disabled person by a caregiver and the general techniques followed by the disabled people to transfer themselves in toilets are investigated. Later, after the conceptual design which is common to both manual and powered version is finalized, the design criteria and target specifications are put forward. Then, the self-transfer devices are developed that satisfy these design criteria and target specifications. This work is licensed under a  Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
行动障碍不仅影响行动能力,还影响残疾人的其他日常活动,包括上厕所、坐椅子等。市面上有各种各样的行动辅助设备,但这些设备可以让轮椅使用者从一个表面自行转移到另一个表面,特别是转移到马桶上,是当下的需要。为了开发手动和电动自转移装置,通过构建概念分类树来确定转移姿势、转移运动顺序、致动器、机构和电源的选择,对整个解决方案空间进行了系统的搜索。在做出这一决定之前,对护理人员转移残疾人所采用的程序以及残疾人在厕所转移自己所遵循的一般技术进行了调查。随后,在手动和电动版本通用的概念设计最终确定后,提出了设计标准和目标规范。然后,开发出满足这些设计标准和目标规范的自转移装置。本作品根据知识共享署名非商业NoDerivatives 4.0国际许可证获得许可。
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引用次数: 2
Smart Irrigation System Using Wireless Sensor Network with Cooja and Contiki 使用Cooja和Contiki无线传感器网络的智能灌溉系统
Q4 Computer Science Pub Date : 2019-03-01 DOI: 10.5875/AUSMT.V9I1.1859
Asir Antony Gnana Singh, Jebamalar Leavline, M. Sushmitha, E. Manjula
Automated irrigation systems are important for improving agricultural productivity, and such systems can be improved through the use of wireless sensor networks (WSN) for detecting and relaying critical information including location-specific temperature, humidity, light, etc. These measurements can then be used to produce more accurate data-driven decisions. This paper presents a smart irrigation system integrating wireless sensor network and using a low power and lossy network (RPL) protocol. Irrigation supply decisions are made in real time, based on data simulated using the Cooja simulator and Contiki operating system. This work is licensed under a  Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
自动化灌溉系统对于提高农业生产力非常重要,这种系统可以通过使用无线传感器网络(WSN)来检测和传递关键信息,包括特定位置的温度、湿度、光线等,从而得到改进。然后,这些测量可以用来产生更准确的数据驱动决策。提出了一种集成无线传感器网络,采用低功耗、低损耗网络(RPL)协议的智能灌溉系统。根据使用Cooja模拟器和Contiki操作系统模拟的数据,实时做出灌溉供应决策。本作品采用知识共享署名-非商业-非衍生品4.0国际许可协议。
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引用次数: 1
A Novel Approach to Optimize Numerical Control Codes Using a Systematic Block Management Method 一种利用系统块管理方法优化数控代码的新方法
Q4 Computer Science Pub Date : 2019-03-01 DOI: 10.5875/AUSMT.V9I1.1728
Leapheng Uon, C. Ng, Francis Gregory Ng, Sharaful-Ilmi Abdulkadir Paduman, A. Chua
The numerical control (NC) codes generated from Computer Aided Manufacturing (CAM) software follow the sequence of adding elements to the design. As an alternative, it would be quite beneficial in cost-reduction to optimize the manufacturing sequence to minimize the run time. Accordingly, this paper introduces a novel approach to optimize the numerical control codes generated from a CAM software package using a systematic block management method. To improve the drilling sequence, contours are also considered as block entities in a traveling salesman problem (TSP) with modifications to systematically manage the blocks of code that define the contours. A MATLAB program was created to automatically optimize the numerical codes from a CAM software translator. Because of easier usage and good performance, a partitioned approach for the λ-opt algorithm was implemented instead of the Lin-Kernighan Heuristic (LKH) that has been extensively proven to be effective in optimizing the traveling salesman problem. The new approach was simulated on sample designs and has been shown to achieve at least 15.52% reduction in airtime and 11.32% reduction in tool travel distance. Experimental data showed a 13.45% decrease in total milling time. This work is licensed under a  Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License .
从计算机辅助制造(CAM)软件生成的数控(NC)代码遵循向设计添加元素的顺序。作为替代方案,优化制造顺序以最小化运行时间在降低成本方面是非常有益的。因此,本文介绍了一种利用系统块管理方法优化CAM软件包生成的数控代码的新方法。为了改进钻孔顺序,在旅行商问题(TSP)中,轮廓也被视为块实体,并进行了修改,以系统地管理定义轮廓的代码块。创建了一个MATLAB程序来自动优化CAM软件翻译器中的数字代码。由于更容易使用和良好的性能,实现了λ-opt算法的分区方法,而不是Lin Kernighan启发式算法(LKH),该算法已被广泛证明在优化旅行商问题方面是有效的。新方法在样本设计上进行了模拟,并已被证明至少可减少15.52%的飞行时间和11.32%的刀具行程距离。实验数据显示,总铣削时间减少了13.45%。本作品根据知识共享署名非商业NoDerivatives 4.0国际许可证获得许可。
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引用次数: 0
期刊
International Journal of Automation and Smart Technology
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