发布求助
文献互助 智能选刊 最新文献

2007 International Symposium on Signals, Systems and Electronics最新文献

筛选
英文 中文
Antenna Bandwidth Optimization Using Transmission Line Matrix Modeling and Genetic Algorithms 基于传输线矩阵建模和遗传算法的天线带宽优化
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294418
N. Fichtner, U. Siart, P. Russer
{"title":"Antenna Bandwidth Optimization Using Transmission Line Matrix Modeling and Genetic Algorithms","authors":"N. Fichtner, U. Siart, P. Russer","doi":"10.1109/ISSSE.2007.4294418","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294418","url":null,"abstract":"The optimization of electromagnetic structures demands for a fast and efficient field solver in conjunction with a flexible and stable optimization method. In this work the time-domain based transmission line matrix (TLM) method is combined with the genetic algorithm (GA). The proposed technique is especially advantageous for the optimization of the operating bandwidth of EM structures and yields a reduced total optimization time compared to conventional frequency domain methods. The efficiency and flexibility of the combined TLM-GA optimization method is shown on the example of low profile patch antennas. The optimized antenna structures support multi-band operation over several Gigahertz. The direct connection of the GA algorithm to the TLM structure file enables a fast and efficient implementation of the optimization routine.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117352010","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: 7
Convergence Properties of Fixed-Point Harmonic Balance Algorithms 不动点调和平衡算法的收敛性
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294406
P. Blakey, S.P. Bates
{"title":"Convergence Properties of Fixed-Point Harmonic Balance Algorithms","authors":"P. Blakey, S.P. Bates","doi":"10.1109/ISSSE.2007.4294406","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294406","url":null,"abstract":"A necessary condition for the local convergence of Borich's fixed point harmonic balance algorithm is derived. The delineation of regions with different convergence properties is then performed using convergence maps. These maps explain the poor convergence and non-convergence that is exhibited by fixed point harmonic balance algorithms in practical applications. A connection between optimal fixed point harmonic balance and conventional harmonic balance is established. This provides a series of insights into ways of improving the generality and performance of fixed point harmonic balance algorithms.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"48 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120994716","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
Innovative Combline RF/Microwave Filter EM Synthesis and Design Using Neural Networks 基于神经网络的新型射频/微波组合滤波器EM合成与设计
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294399
V. Miraftab, Ming Yu
{"title":"Innovative Combline RF/Microwave Filter EM Synthesis and Design Using Neural Networks","authors":"V. Miraftab, Ming Yu","doi":"10.1109/ISSSE.2007.4294399","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294399","url":null,"abstract":"This paper presents a novel approach for the design of combline filters using multi stage artificial neural networks (ANN). The method takes advantage of direct synthesis of subsections of the filter using very fast and accurate neural models based on exact electromagnetic (EM) simulations using ANSOFT HFSS. The neural network synthesis approach takes into account the loading effects from adjacent resonators to achieve optimal results. The overall ANN system is capable of designing different filters at different center frequencies and bandwidths. This approach offers significantly reduced time in the design of filters within the validity range of the ANN system. The method has been proven to work efficiently for 4-pole elliptic and 6-pole Chebyshev examples for different center frequencies and bandwidths.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125786734","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: 7
Statistical Detection of NTSC Signals in an IEEE 802.22 Environment for Dynamic Spectrum Access IEEE 802.22动态频谱接入环境下NTSC信号的统计检测
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294414
Y. Karmalita, H. Leib
{"title":"Statistical Detection of NTSC Signals in an IEEE 802.22 Environment for Dynamic Spectrum Access","authors":"Y. Karmalita, H. Leib","doi":"10.1109/ISSSE.2007.4294414","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294414","url":null,"abstract":"The concept of next generation (xG) networks is a novel paradigm that attempts to mitigate spectrum overcrowding and inefficiencies. This objective is envisaged to be accomplished by allowing unlicensed users to utilize licensed parts of the spectrum opportunistically, without disrupting the quality of service (QoS) for licensed users. The cornerstone of xG networks lies in the ability of the device to sense the surrounding spectral environment and use this knowledge to alter its transceiver characteristics. This paper addresses the pertinent issue of determining whether the spectrum in a particular television band is occupied by a licensed national television standards committee (NTSC) signal or some other unlicensed signal. The differentiation between the two signals employs correlation detection based on a locally most powerful test.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126034000","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
Investigations on Optimum Reference Signal Structure for Single-Carrier FDMA Radio Access in Evolved UTRA Uplink 演进UTRA上行单载波FDMA无线接入最佳参考信号结构研究
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294462
T. Kawamura, Y. Kishiyama, K. Higuchi, M. Sawahashi
{"title":"Investigations on Optimum Reference Signal Structure for Single-Carrier FDMA Radio Access in Evolved UTRA Uplink","authors":"T. Kawamura, Y. Kishiyama, K. Higuchi, M. Sawahashi","doi":"10.1109/ISSSE.2007.4294462","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294462","url":null,"abstract":"This paper presents the optimum reference signal (RS) structure for single-carrier (SC)-FDMA radio access using discrete Fourier transform (DFT)-spread OFDM to satisfy the requirements in the Evolved UTRA uplink. The simulation results shows that the optimum fast Fourier transform (FFT) block length, i.e., data block length, is approximately 66.7 -133.3 musec, corresponding to the FFT length of 1024 -2048 points assuming the sampling frequency of 15.36 Mega samples per second. Moreover, it is shown that an RS structure that comprises two RS blocks contained within the duration of a 1-msec sub-frame is the most promising candidate based on superior user throughput under low mobility conditions such as less than approximately 120 km/h and on a high degree of commonality of radio parameters such as that in the downlink, considering the fairly low applicability of 16QAM modulation under extremely high mobility conditions such as 350 km/h.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"250 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123671428","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
Passivity Enforcement for Method of Characteristics-based Multiconductor Transmission Line Macromodels 基于特性的多导体传输线宏模型方法的无源增强
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294405
Changzhong Chen, D. Saraswat, E. Gad, M. Nakhla, R. Achar, M. Yagoub
{"title":"Passivity Enforcement for Method of Characteristics-based Multiconductor Transmission Line Macromodels","authors":"Changzhong Chen, D. Saraswat, E. Gad, M. Nakhla, R. Achar, M. Yagoub","doi":"10.1109/ISSSE.2007.4294405","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294405","url":null,"abstract":"In the recent past, method of characteristics (MoC) has emerged as an efficient macromodeling and simulation technique for long high-speed transmission lines with low loss. However, one of the major limitations of this technique is that, the resulting interconnect macromodels are not guaranteed to be passive, which can lead to non-physical unstable transient responses during simulation. In order to address this problem, we present a new passivity compensation algorithm for non-passive MoC-based multiconductor transmission line (MTL) macromodels. The algorithm is based on the first-order perturbation of the non-passive macromodel and can handle single as well as coupled interconnects. A sample numerical example is presented to validate the efficiency of the algorithm.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114246953","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: 9
Passive CMOS UHF RFID Transponders: A Nonlinear Black-Box Model of the RF Frontend 无源CMOS超高频RFID应答器:射频前端的非线性黑盒模型
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294537
R. Weigel, K. Seemann
{"title":"Passive CMOS UHF RFID Transponders: A Nonlinear Black-Box Model of the RF Frontend","authors":"R. Weigel, K. Seemann","doi":"10.1109/ISSSE.2007.4294537","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294537","url":null,"abstract":"This paper presents a dynamic nonlinear behavioral model of the RF frontend of a passive RFID transponder for use in single-reader system simulations. By using this model the simulation time for antenna optimizations can be reduced considerably. In addition to the reduction of the simulation effort, the model hides the physical implementation and intellectual properties. A mixed time-domain/frequency-domain formulation is introduced for faster model parameter identification. Feedforward multi-layer-perceptron artificial-neural-networks have been used for the nonlinear multivariate system mapping.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122078747","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
Enhanced Modes of the Sensitivity Analysis for RF Design 射频设计灵敏度分析的增强模式
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294419
J. Dobes, Z. Kolka
{"title":"Enhanced Modes of the Sensitivity Analysis for RF Design","authors":"J. Dobes, Z. Kolka","doi":"10.1109/ISSSE.2007.4294419","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294419","url":null,"abstract":"The majority of standard tools for computer aided design can perform only limited types of the sensitivity analysis: Spice determines operating-point sensitivities, and Affirma RF contains a parametric sensitivity analysis that can be used for determining phase noise, for example. In the paper, some types of the sensitivity analysis in the frequency domain are described which are not present in the standard simulators-especially, a procedure is suggested for determining the sensitivities of noise figure. First, an improvement of the method for computing the noise figure is presented, which incorporates necessary circuit matching and eliminates the subtraction of output noise from load at each frequency. Second, a simple formula is derived for computing the sensitivities of the noise figure. The sensitivity analysis in the frequency domain is generally demonstrated by means of a distributed microwave amplifier first, and then using the sensitivity analysis of the noise figure for improving the noise properties of a monolithic microwave amplifier is described.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116750190","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
A Novel Switchable Microwave Filter Constructed with Inter-Coupled Split-Ring Resonators and Photosensitive Cadmium Sulfide 一种由间耦合分环谐振器和光敏硫化镉构成的新型可切换微波滤波器
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294506
J. Wu, I. Shih
{"title":"A Novel Switchable Microwave Filter Constructed with Inter-Coupled Split-Ring Resonators and Photosensitive Cadmium Sulfide","authors":"J. Wu, I. Shih","doi":"10.1109/ISSSE.2007.4294506","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294506","url":null,"abstract":"A novel construction of optically controlled microwave filter is proposed and studied. Inter-coupled split-ring resonators (SRR) were directly implemented on a microstrip transmission line to build a bandpass filter with a very large fractional bandwidth. Highly photosensitive cadmium sulfide (CdS) thin film was utilized to provide the capability of switching to the structure. A low sheet resistance of 300 ohms per square was achieved for CdS thin film under illuminated condition. When the photosensitive CdS thin film is deposited on the microstrip line, the filtering phenomenon induced by the inter-coupled SRR can be controlled optically. It has been demonstrated in both simulation and experimental measurement that the transmission coefficient is switched from 19 dB to 1.5 dB at 5 GHz while the passband region is centered at 14 GHz. Simulation results indicate that the insertion loss can be improved when the SRR cell number or the ring spacing is decreased.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127793654","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
SMF: A User-Friendly Software Engine for Space-Mapping-Based Engineering Design Optimization SMF:基于空间映射的工程设计优化的用户友好软件引擎
2007 International Symposium on Signals, Systems and Electronics Pub Date : 2007-08-27 DOI: 10.1109/ISSSE.2007.4294437
S. Koziel, J. Bandler
{"title":"SMF: A User-Friendly Software Engine for Space-Mapping-Based Engineering Design Optimization","authors":"S. Koziel, J. Bandler","doi":"10.1109/ISSSE.2007.4294437","DOIUrl":"https://doi.org/10.1109/ISSSE.2007.4294437","url":null,"abstract":"Although space mapping is a powerful optimization and modeling methodology, it is not always straightforward to implement, especially if one wants to use some advanced techniques and employ commercial simulators in the automatic optimization loop. The SMF system is a user-friendly space mapping software that is designed to make space mapping accessible to engineers inexperienced in this technology. SMF allows automatic or interactive space-mapping-based constrained optimization, modeling and statistical analysis. It incorporates most of the existing space mapping techniques including input, output, implicit, and frequency space mapping as well as the latest developments such as space-mapping based interpolation and advanced modeling techniques. SMF provides sockets to popular EM/circuit simulators including Sonnet em, MEFiSTo, ADS, and FEKO. In this paper we give a brief introduction to space mapping methodology as well as an exposition of the SMF system with special focus on its optimization interfaces. An SMF application example is given.","PeriodicalId":409155,"journal":{"name":"2007 International Symposium on Signals, Systems and Electronics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132561255","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: 23
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书