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2007 Asia-Pacific Conference on Applied Electromagnetics最新文献

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Secured indoor powerline communication using CDMA technique 利用CDMA技术保护室内电力线通信
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603946
M. Abuelhassan, R. Ngah
{"title":"Secured indoor powerline communication using CDMA technique","authors":"M. Abuelhassan, R. Ngah","doi":"10.1109/APACE.2007.4603946","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603946","url":null,"abstract":"With the rapid growth of home networks, there is an ongoing need for an economical and reliable communications system that can be implemented in any building. Powerline channel has been considered as a medium not only for low-rate, control communications, but also for high-speed data communications, such as home networking and Internet access. Communication over the power line has become an opportunity for the power distributors to implement new services. The focus of this paper is to address the challenges in PLC such as noise and security. The techniques to overcome these challenges are presented.","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":"134414271","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
A fast shielding effectiveness calculation of rectangular enclosures with arbitrary shape apertures 任意形状孔径矩形围护结构屏蔽效能的快速计算
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603884
M. Khorrami, P. Dehkhoda, R. Moini, S. Sadeghi
{"title":"A fast shielding effectiveness calculation of rectangular enclosures with arbitrary shape apertures","authors":"M. Khorrami, P. Dehkhoda, R. Moini, S. Sadeghi","doi":"10.1109/APACE.2007.4603884","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603884","url":null,"abstract":"A fast method of moments (MoM) solution of surface electric field integral equation (EFIE) is employed to evaluate the electromagnetic wave coupling inside metallic enclosures, due to presence of arbitrary shape slots. In this paper, we propose an appropriate numerical integration technique in order to reduce the MoM impedance matrix calculation time without compromising accuracy. The technique is used to compute integrals resulting from MoM for the frequencies above the cavity first resonance. Within this frequency range, the wave penetration inside the enclosure is high and so one can avoid unnecessary high accuracy integrations. Regarding this new technique, the shielding effectiveness of an enclosure is evaluated efficiently in a wide range of frequency. The accuracy of the method is demonstrated by a number of examples.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"32 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":"133554322","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: 3
A comparative FDTD analysis of magnetized ferrites 磁化铁氧体的时域有限差分对比分析
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603879
K.A. Madanifar, M. Kamyab
{"title":"A comparative FDTD analysis of magnetized ferrites","authors":"K.A. Madanifar, M. Kamyab","doi":"10.1109/APACE.2007.4603879","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603879","url":null,"abstract":"The FDTD method is applied to the full-wave analysis of rectangular waveguides loaded with E-plane or H-plane ferrite slabs with transverse magnetization. The treatment of the ferrite material is based on the equation of motion using the Gilbertpsilas approximation of the damping term. A comparison between the accuracy of two discretization approaches is done through numerical examples.","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":"115226511","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: 1
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
RF receiver system design for Wireless Local Area Network bridge at 5725 to 5825 MHz 无线局域网网桥5725 ~ 5825 MHz射频接收系统设计
2007 Asia-Pacific Conference on Applied Electromagnetics Pub Date : 2007-12-01 DOI: 10.1109/APACE.2007.4603910
N. Shairi, T. A. Rahman, M. Aziz
{"title":"RF receiver system design for Wireless Local Area Network bridge at 5725 to 5825 MHz","authors":"N. Shairi, T. A. Rahman, M. Aziz","doi":"10.1109/APACE.2007.4603910","DOIUrl":"https://doi.org/10.1109/APACE.2007.4603910","url":null,"abstract":"In data communication system, the outdoor of Wireless Local Area Network (WLAN) technology can be implemented in bridge connection. It allows LANs in separated buildings to be connected over the distance ranging in several hundred meters. In RF system design level, the performance of the WLAN bridge also relies on the RF receiver system where it must be well designed to minimize distortions in the system. This paper presents a RF receiver system design for WLAN bridge at 5725 - 5825 MHz based on IEEE 802.11a standard. At 54 Mbps data rate, the receiver can receive minimum input power of -69.1 dBm with 19.84 dB SNR and 47.3 dB dynamic range which is comply with the standard. Beside that, the prototype of the RF receiver has been measured to verify with the simulation results in terms of gain compression and spurious responses.","PeriodicalId":356424,"journal":{"name":"2007 Asia-Pacific Conference on Applied Electromagnetics","volume":"47 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":"124799985","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: 14
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
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
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
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
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