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2007 Asia-Pacific Conference on Applied Electromagnetics最新文献

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The influence of different core arrangements on magnetic properties of electrical sheets under one-dimensional magnetizing system 一维磁化系统下不同磁芯排列对电片磁性能的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603857
A. H. Jahidin, W. Mahadi
{"title":"The influence of different core arrangements on magnetic properties of electrical sheets under one-dimensional magnetizing system","authors":"A. H. Jahidin, W. Mahadi","doi":"10.1109/APACE.2007.4603857","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603857","url":null,"abstract":"This paper is concerned with the measurement on the magnetic properties of electrical steels under one-dimensional magnetizing system at the frequency of 50 Hz. The magnetic properties were principally investigated by designing and developing magnetizing system, constructed by two laminated C-cores and wound with copper wire. The influence of different core arrangements, which are horizontal and vertical arrangement on magnetic properties of electrical steel, is analyzed in order to achieve the best performance in the magnetizing system. The magnetic characteristics of different types of electrical steels were also presented. The experimental results show that stress was introduced on the sample when vertical set-up was employed.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122533171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Target prediction in Forward Scattering Radar 前向散射雷达目标预测
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603914
R. Abdullah, M. Rasid, M. W. Azis, M. Khalafalla
{"title":"Target prediction in Forward Scattering Radar","authors":"R. Abdullah, M. Rasid, M. W. Azis, M. Khalafalla","doi":"10.1109/APACE.2007.4603914","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603914","url":null,"abstract":"This paper describes aspects of ground target detection using a Forward Scattering Radar (FSR). The problem of extracting the Doppler signature in different interference environments is addressed. Hilbert Transform and Wavelet have been used to predict the existence of target. The paper begins with a brief description of the system, followed by a more detailed analytical study of predicting the presence of target in FSR. A practical experimentation has been realised to evaluate the proposed algorithm.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130638402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Performance evaluation of multiple differential detection for third generation mobile communication system 第三代移动通信系统多差分检测性能评价
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603898
M. S. Johal, M. K. Suaidi, A. R. Othman
{"title":"Performance evaluation of multiple differential detection for third generation mobile communication system","authors":"M. S. Johal, M. K. Suaidi, A. R. Othman","doi":"10.1109/APACE.2007.4603898","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603898","url":null,"abstract":"Third generation mobile communication system is widely used nowadays. One of its parameter standard, which is QPSK modulation has been adopted by International Telecommunication Union (ITU) to be used in IMT-2000. However, due to amplitude variations introduced in QPSK, a rather robust and reliable data modulation technique, namely the pi/4-shift Differential QPSK is proposed. For detection purposes, two types of detectors are evaluated for their performance in AWGN and Rayleigh fading channels. A differential detection technique called multiple differential detection technique which uses maximum-likelihood sequence estimation (MLSE) of the transmitted phases is compared with conventional differential detection which uses symbol-by-symbol detection. By using some of the IMT-2000 standard parameters, the simulation results show that multiple differential detection scheme performs much better than conventional differential detection scheme.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126210844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
K-factor due to implementing of DC unbalanced/balanced of a transformer 由于变压器的直流不平衡/平衡实现的k因子
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603926
S. Hasan, I. Daut, S. Taib
{"title":"K-factor due to implementing of DC unbalanced/balanced of a transformer","authors":"S. Hasan, I. Daut, S. Taib","doi":"10.1109/APACE.2007.4603926","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603926","url":null,"abstract":"This paper presents the effects of harmonic distortion on loaded single phase two winding transformer.The impact on K-factor is studied by implementing DC unbalanced and balanced configurations. The measurements are done online from the primary side. The result shows that the current total harmonic distortion (THDi), power factor (PF) and K-factor not only depend on type of loads but also depend on the voltage level which supplies to primary winding. By determining the K-Factor which influence the heating effect, then an appropriate transformer can be designed.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127128202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Ray-tracing propagation prediction for wireless mesh networks (WMNs) 无线网状网络(WMNs)的射线追踪传播预测
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603949
M. S. Zakaria, V. R. Gannapathy, M. Muhammad, N. M. Salleh, M. K. Suaidi, M. Johal, M. Aziz, M.R. Ahmad
{"title":"Ray-tracing propagation prediction for wireless mesh networks (WMNs)","authors":"M. S. Zakaria, V. R. Gannapathy, M. Muhammad, N. M. Salleh, M. K. Suaidi, M. Johal, M. Aziz, M.R. Ahmad","doi":"10.1109/APACE.2007.4603949","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603949","url":null,"abstract":"Nowadays, a lot of research efforts and technical papers are done on ad-hoc networks and wireless local area networks (WLAN). Recently, however wireless mesh networking is attracting significant interest from academia, industry, and standard organizations because it is offer several favorable characteristics such as dynamic self-organization, easy maintenance and reliable services. A network with several transmitters and receivers that communicate to each other will form a mesh network topology. Once the transmitter launches a ray, it will be reflected, refracted or diffracted to any kind of surfaces such as the concrete wall. That process will decrease the received signal strength at the receiver. So, ray-tracing technique can be used to analyze the network performance. It is a method that used to determine the ray paths that emanate from the transmitter (Tx) and arrive at the receiver (Rx), and also an efficient approach in determining the propagation issues in wireless environment. So, this paper will be focused on Ray-Tracing techniques and WMNs theories.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"102 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113945891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of SSN-induced PDN noise on a LVDS output buffer ssn诱导的PDN噪声对LVDS输出缓冲器的影响
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603878
J. Kho, C. I. Loh, B. Krsnik, Zhe Li, C. Fong, P. Boyle, M. Wong
{"title":"Effect of SSN-induced PDN noise on a LVDS output buffer","authors":"J. Kho, C. I. Loh, B. Krsnik, Zhe Li, C. Fong, P. Boyle, M. Wong","doi":"10.1109/APACE.2007.4603878","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603878","url":null,"abstract":"As the semiconductor nanotechnology process progresses, advanced devices achieve high performance by reducing parasitic effects, including logic variations caused by noise at SSN input and outputs (I/O), and output bufferpsilas timing variations caused by switching I/O banks (SSN-TV). This paper presents these timing variations by studying the LVDS output jitter of a 65-nm wire-bond FPGA device in the presence of SSN. By using differential signaling, the effect of inductive coupling can be significantly reduced, allowing the PDN effect to be observed more clearly. Due to the PDN resonance effect, the LVDS output jitter reaches maximum (peak) when the transient current in the PDN oscillates at the resonance frequency. This study shows that output jitter peaks not only when the SSN is at the resonance frequency but also when it is at half the resonance frequency.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114599225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Analysis of ionospheric models during ionospheric disturbances 电离层扰动期间电离层模式的分析
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603887
M. Abdullah, D. Mat, A. Zain, S. Abdullah, S. Zulkifli
{"title":"Analysis of ionospheric models during ionospheric disturbances","authors":"M. Abdullah, D. Mat, A. Zain, S. Abdullah, S. Zulkifli","doi":"10.1109/APACE.2007.4603887","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603887","url":null,"abstract":"This paper describes an analysis of ionospheric models compared with real data during the occurrence of travelling ionospheric disturbances. GPS data was taken from Parit Raja Station (1deg 52' N, 103deg 06' E) in Southern Malaysia. Comparison was made from collected data during the geomagnetic quiet and storm days. Ionospheric models i.e. IRI2001, NeQuick and real data as in IONEX format were used in this study. Results were compared with real TEC data from Parit Raja as reference value, which was obtained from a general dual frequency method. Data collected from IONEX showed that the occurrence of TID was less frequent when compared to the real data from Parit Raja. This was due to the few ground stations located at site of study. For both the empirical models, IRI2001 and NeQuick, the predicted TEC was affected by the value of sunspot number and was suitable for geomagnetic quiet conditions. It is recommended that IRI and NeQuick models that undergo improvement should include ionospheric disturbances for more reliable TEC calculations.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126726938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Mobile prayer times and Qiblat direction using GPS 移动祈祷时间和Qiblat方向使用GPS
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603863
A. Isa, Z. Zakaria, F. M. Johar, A.F. Othman
{"title":"Mobile prayer times and Qiblat direction using GPS","authors":"A. Isa, Z. Zakaria, F. M. Johar, A.F. Othman","doi":"10.1109/APACE.2007.4603863","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603863","url":null,"abstract":"This paper presented the development an innovative system to determine the Prayer Times and the current digital Qiblat (Kapsilabah) direction in real time using Personal Digital Assistant (PDA)/ Pocket PC with built-in Global Positioning System (GPS). The GUI-based software has been developed to help users determine their current Prayer Times and Qiblat direction automatically even if they are on the move or in any type of vehicles such as in airplanes, ships, trains etc. The GPS receiver will capture information with regards to the userpsilas current location. This information will then be synchronized by this software in order for the whole system to be operated correctly. Therefore, the determination of the prayer times and the Qiblat direction is done by the system automatically, without the requirement to select the current location where it is a standard practice for the existing conventional systems. The idea behind this software is to assist Muslims by providing them with accurate information that can help in their daily duty.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130033416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Obtaining translation from a 6-DOF MEMS IMU — an overview 从6自由度MEMS IMU获得平移-概述
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603861
Ashrani Aizzuddin Abd. Rahni, I. Yahya
{"title":"Obtaining translation from a 6-DOF MEMS IMU — an overview","authors":"Ashrani Aizzuddin Abd. Rahni, I. Yahya","doi":"10.1109/APACE.2007.4603861","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603861","url":null,"abstract":"In freehand 3D Ultrasound (3D-US) scanning one needs to track a B-mode scanner across a subject of interest to construct the 3D image. In this paper we use a compact IMU (inertial measurement unit), as an alternative method that have certain advantages compared to other conventional methods. However IMUs accumulate translational errors thus we study if we can overcome them by low pass filtering and making assumptions on the nature of the introduced drift. We also briefly expound on alternative methods of obtaining translation by only using either the acceleration output or the orientation output. We then interpret the results of our experiments and expound we finally conclude with further improvements that can be made. We hope that this paper would be a good introduction to research using 6-DOF (degrees of freedom) MEMS IMUs that are becoming more accessible and have a wide range of applications.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130170673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Quasi-static model of microelectromechanical cantilever 微机电悬臂梁的准静态模型
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603850
A. Lai, A.A. Rahman, W. Wong
{"title":"Quasi-static model of microelectromechanical cantilever","authors":"A. Lai, A.A. Rahman, W. Wong","doi":"10.1109/APACE.2007.4603850","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603850","url":null,"abstract":"The modeling of the microelectromechanical cantilever is governed by the Navierpsilas equation for elasticity and the Maxwellpsilas equation for electrostatic. The computational analysis comprised of the electrostatic analysis and the mechanical analysis [1]. The electric field is derived from the potential difference between the cantilever and the ground (reference plate). The surface force due to the potential difference is then fed to the mechanical analysis module to compute the deformation of the micromechanical structure. The analysis is done iteratively until an equilibrium state is reached. The deformation of the micromechanical structure as gives rise to the redistribution of the electric charges on the surface of the structure, hence a change in the electric field. Deformation of the microelectromechanical structure as well as the redistribution of the electric charges requires a re-meshing of the domains after each iterative step. The proposed model adopts an uncoupled quasi-static approach together with a dasiamoving meshpsila algorithm. The model is used to simulate the reaction of the cantilever due to the change in the electric field.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132552956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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