Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.251950
M. A. Nassef, E. A. Hosny, M. Sobhy
Explicit forms of the state and output equations of lumped/distributed networks in inhomogeneous media are derived. No restriction on the network topology is required. Multicoupled structures in inhomogeneous media occur frequently in microwave circuits, especially in integrated circuits. The effect of different mode propagation can easily be taken into consideration. Illustrative examples of microstrip circuits are analyzed. The derived formulas have been incorporated in computer-aided procedures for the analysis of lumped/distributed networks in the frequency and time domain. The developed program incorporating the state and output equations can deal with any number of coupled transmission lines in inhomogeneous media.<>
{"title":"Computer aided analysis and design of lumped/distributed microstrip networks in inhomogeneous media","authors":"M. A. Nassef, E. A. Hosny, M. Sobhy","doi":"10.1109/MWSCAS.1991.251950","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.251950","url":null,"abstract":"Explicit forms of the state and output equations of lumped/distributed networks in inhomogeneous media are derived. No restriction on the network topology is required. Multicoupled structures in inhomogeneous media occur frequently in microwave circuits, especially in integrated circuits. The effect of different mode propagation can easily be taken into consideration. Illustrative examples of microstrip circuits are analyzed. The derived formulas have been incorporated in computer-aided procedures for the analysis of lumped/distributed networks in the frequency and time domain. The developed program incorporating the state and output equations can deal with any number of coupled transmission lines in inhomogeneous media.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"95 1","pages":"1069-1072 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79177623","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.251940
H. Baher, S. Zhuang
A novel technique for the design of switched-capacitor bandpass filters with amplitude selectivity and phase linearity in a significant portion of the passband is presented. The technique uses low-sensitivity structures employing lossless-discrete integrator building blocks. The design of a sixth-order bandpass filter is considered as an example.<>
{"title":"Design of wide-band switched-capacitor filters with arbitrary and linear phase responses","authors":"H. Baher, S. Zhuang","doi":"10.1109/MWSCAS.1991.251940","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.251940","url":null,"abstract":"A novel technique for the design of switched-capacitor bandpass filters with amplitude selectivity and phase linearity in a significant portion of the passband is presented. The technique uses low-sensitivity structures employing lossless-discrete integrator building blocks. The design of a sixth-order bandpass filter is considered as an example.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"43 1","pages":"1047-1048 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76396790","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252210
H. Oloomi
Sampled data systems having two frequency scale behavior are introduced. Properties of these systems are characterized in terms of their transfer matrices. An approximation theorem is given by which a two frequency scale sampled data (TFS-SD) system can be approximated in terms of its low and high frequency parts. The relationship between a TFS-SD system and its time domain counterpart, a two time scale sampled data (TTS-SD) system, is established.<>
{"title":"Frequency domain characterization of two time scale sampled data systems","authors":"H. Oloomi","doi":"10.1109/MWSCAS.1991.252210","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252210","url":null,"abstract":"Sampled data systems having two frequency scale behavior are introduced. Properties of these systems are characterized in terms of their transfer matrices. An approximation theorem is given by which a two frequency scale sampled data (TFS-SD) system can be approximated in terms of its low and high frequency parts. The relationship between a TFS-SD system and its time domain counterpart, a two time scale sampled data (TTS-SD) system, is established.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"67 1","pages":"467-470 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79543583","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252205
A. Ogunfunmi
The author analyzes the performance of a novel implementation of the frequency-domain LMS (least mean square) adaptive filter. This implementation is based on using the LMS adaptive algorithm to implement the DFT (discrete Fourier transform) part of the frequency-domain LMS adaptive filter. Numerical issues are also discussed. This is significant in this implementation because the performance of the frequency-domain LMS adaptive filter is dependent on the accuracy of the DFT computation obtained by using the LMS algorithm. The effects of inaccurate transform (DFT) computation of the performance of the transform-domain LMS adaptive filter are analyzed. The author also used a linear filter model to explain some of the observed nonideal effects. This indicated that, for large filter lengths, the accuracy of the DFTs computed diminishes.<>
{"title":"Performance analysis of a new implementation for the frequency-domain LMS adaptive filter","authors":"A. Ogunfunmi","doi":"10.1109/MWSCAS.1991.252205","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252205","url":null,"abstract":"The author analyzes the performance of a novel implementation of the frequency-domain LMS (least mean square) adaptive filter. This implementation is based on using the LMS adaptive algorithm to implement the DFT (discrete Fourier transform) part of the frequency-domain LMS adaptive filter. Numerical issues are also discussed. This is significant in this implementation because the performance of the frequency-domain LMS adaptive filter is dependent on the accuracy of the DFT computation obtained by using the LMS algorithm. The effects of inaccurate transform (DFT) computation of the performance of the transform-domain LMS adaptive filter are analyzed. The author also used a linear filter model to explain some of the observed nonideal effects. This indicated that, for large filter lengths, the accuracy of the DFTs computed diminishes.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"100 1","pages":"501-504 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77444959","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252138
L. D. Paarmann, M. Korenberg
A recent ARMA (autoregressive moving average) algorithm for the identification of stochastic systems and signal models is discussed, and empirical results are given. The ARMA identifier discussed includes inherent order estimation. In comparison with other ARMA stochastic system identifiers, the new procedure has been empirically shown to yield highly accurate, unbiased results.<>
{"title":"Accurate ARMA signal identification-empirical results","authors":"L. D. Paarmann, M. Korenberg","doi":"10.1109/MWSCAS.1991.252138","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252138","url":null,"abstract":"A recent ARMA (autoregressive moving average) algorithm for the identification of stochastic systems and signal models is discussed, and empirical results are given. The ARMA identifier discussed includes inherent order estimation. In comparison with other ARMA stochastic system identifiers, the new procedure has been empirically shown to yield highly accurate, unbiased results.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"40 1","pages":"110-113 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77550537","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.251953
H.K. Kim
In filter design, the delay characteristic becomes flatter as the values of the pole-Q decrease. For elliptic filters there exists a method by which one may continuously decrease Q values by increasing a single parameter within the design specifications. It is demonstrated that the pole Q can be lowered by increasing omega /sub s/ (the stopband frequency where the stopband begins). As a consequence the step response in the time domain as well as the delay characteristic in the frequency domain improves.<>
{"title":"Enhancement of transmission characteristics in elliptic filter design","authors":"H.K. Kim","doi":"10.1109/MWSCAS.1991.251953","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.251953","url":null,"abstract":"In filter design, the delay characteristic becomes flatter as the values of the pole-Q decrease. For elliptic filters there exists a method by which one may continuously decrease Q values by increasing a single parameter within the design specifications. It is demonstrated that the pole Q can be lowered by increasing omega /sub s/ (the stopband frequency where the stopband begins). As a consequence the step response in the time domain as well as the delay characteristic in the frequency domain improves.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"27 2","pages":"1057-1060 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91454521","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252150
H. Moghbelli, M. Rashid
The authors survey the literature on the switched reluctance motor (SRM) and drives. They present a classification scheme for the SRM drives that permits the SRM to be categorized based on the characteristics of motor design, controller circuit, performance, and applications. This performance review provides useful guidelines for comparing the SRM with different AC motor drives.<>
{"title":"Performance review of the switched reluctance motor drives","authors":"H. Moghbelli, M. Rashid","doi":"10.1109/MWSCAS.1991.252150","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252150","url":null,"abstract":"The authors survey the literature on the switched reluctance motor (SRM) and drives. They present a classification scheme for the SRM drives that permits the SRM to be categorized based on the characteristics of motor design, controller circuit, performance, and applications. This performance review provides useful guidelines for comparing the SRM with different AC motor drives.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"41 1","pages":"162-165 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87716348","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252085
Gui-Xin Cheng, M. Ikegami, M. Tanaka
A novel constructive parallel path searching method is proposed. This method is based on selecting local maximum current in unity resistive mesh (URM) whose principle is to obtain the field expressed with the Poisson equation. A bottleneck detecting approach based on the proposed method is presented. The proposed method has been applied to the problems of LSI routing, communication path routing of a processor array, and path searching for a robot. Experimental results showed the efficiency of the proposed method.<>
{"title":"A resistive mesh analysis method for parallel path searching","authors":"Gui-Xin Cheng, M. Ikegami, M. Tanaka","doi":"10.1109/MWSCAS.1991.252085","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252085","url":null,"abstract":"A novel constructive parallel path searching method is proposed. This method is based on selecting local maximum current in unity resistive mesh (URM) whose principle is to obtain the field expressed with the Poisson equation. A bottleneck detecting approach based on the proposed method is presented. The proposed method has been applied to the problems of LSI routing, communication path routing of a processor array, and path searching for a robot. Experimental results showed the efficiency of the proposed method.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"21 1","pages":"827-830 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73545212","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252129
M. Obaidat, J.V. Walk
A comparative study of the artificial neural computing and traditional approaches to image processing is performed. The major goal is to determine the usefulness of artificial neural systems (ANSs) for such image processing applications as histogramming and image encoding. The paradigm used was developed from a C programming language model of a perceptron ANS with consideration of backpropagation attributes. It is found that the ANS approach produces results similar to those of traditional techniques.<>
{"title":"An evaluation study of traditional and neural network techniques for image processing applications","authors":"M. Obaidat, J.V. Walk","doi":"10.1109/MWSCAS.1991.252129","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252129","url":null,"abstract":"A comparative study of the artificial neural computing and traditional approaches to image processing is performed. The major goal is to determine the usefulness of artificial neural systems (ANSs) for such image processing applications as histogramming and image encoding. The paradigm used was developed from a C programming language model of a perceptron ANS with consideration of backpropagation attributes. It is found that the ANS approach produces results similar to those of traditional techniques.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"1 1","pages":"72-75 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74894127","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}
Pub Date : 1991-05-14DOI: 10.1109/MWSCAS.1991.252016
S. Chan, K. Ho
An efficient 2-D interpolation algorithm is presented which is a 2-D extension of the subsequence approach for 1-D interpolation introduced by K. Prasad and P. Satyanarayana (1986), which avoids the redundant operations in the inverse transform. An improved intermediate sequence is introduced to preserve the Hermitian symmetry when interpolating a real-valued signal. The resulting algorithm is significantly more efficient than the 2-D FFT method of J.W. Adams (1987). It is also more convenient, since it permits the use of the IFFT with a size that is the same as that of the original FFT.<>
{"title":"2-D signal interpolation using subsequence FFT","authors":"S. Chan, K. Ho","doi":"10.1109/MWSCAS.1991.252016","DOIUrl":"https://doi.org/10.1109/MWSCAS.1991.252016","url":null,"abstract":"An efficient 2-D interpolation algorithm is presented which is a 2-D extension of the subsequence approach for 1-D interpolation introduced by K. Prasad and P. Satyanarayana (1986), which avoids the redundant operations in the inverse transform. An improved intermediate sequence is introduced to preserve the Hermitian symmetry when interpolating a real-valued signal. The resulting algorithm is significantly more efficient than the 2-D FFT method of J.W. Adams (1987). It is also more convenient, since it permits the use of the IFFT with a size that is the same as that of the original FFT.<<ETX>>","PeriodicalId":6453,"journal":{"name":"[1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems","volume":"8 2 1","pages":"700-703 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1991-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77327598","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：