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The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.最新文献

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The ultra-wideband signal propagation 超宽带信号传播
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354241
K. Y. Yazdandoost, R. Kohno
{"title":"The ultra-wideband signal propagation","authors":"K. Y. Yazdandoost, R. Kohno","doi":"10.1109/MWSCAS.2004.1354241","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354241","url":null,"abstract":"In the ultra-wideband (UWB) system the pulses are transmitted at a very low level, where the signal looks like low level noise to the other wireless system. Therefore, a good understanding of the UWB signal propagation is necessary. Moreover, UWB communications rely on an unusual wireless technology (a carrier free and huge bandwidth), so that designing of UWB system raises a number of questions. This paper describes a theoretical study of the UWB propagation and losses. This study is based on two ray model in the case of short range line of sight UWB transmission. The model takes into account both frequency dependent parameters and distance.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124433320","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 compact code for representing floorplans 表示平面图的简洁代码
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354020
Hua-An Zhao, Chen Liu, Y. Kajitani, K. Sakanushi
{"title":"A compact code for representing floorplans","authors":"Hua-An Zhao, Chen Liu, Y. Kajitani, K. Sakanushi","doi":"10.1109/MWSCAS.2004.1354020","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354020","url":null,"abstract":"A new compact code called EQ-sequence for representing a floorplan is presented. A floorplan decides the placement of modules in VLSI design. The EQ-sequence is developed from Q-sequence and it can preserve the adjacent relationships of rooms on a floorplan, but the Q-sequence cannot. The algorithms for encoding, moving and decoding of EQ-sequences are introduced, respectively. By the EQ-sequence, we can check whether two modules abut or not on a floorplan. It has been proved that any floorplan of n rooms is uniquely encoded by an EQ-sequence and any EQ-sequence is uniquely decoded to a floorplan, both are in O(n) time.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114818323","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
The theory and design of a class of perfect reconstruction modified DFT filter banks with IIR filters 介绍了一类带IIR滤波器的完美重构改进DFT滤波器组的理论与设计
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354327
S. Yin, S. Chan
{"title":"The theory and design of a class of perfect reconstruction modified DFT filter banks with IIR filters","authors":"S. Yin, S. Chan","doi":"10.1109/MWSCAS.2004.1354327","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354327","url":null,"abstract":"This paper proposes a theory and design method for a class of PR causal-stable modified discrete Fourier transform (MDFT) filter bank (FB) with IIR filters. The prototype filter of the MDFT FB is assumed to have identical denominator in order to simplify the PR condition. A new model reduction technique is proposed for deriving a nearly PR (NPR) MDFT FB from a PR MDFT FB with FIR prototype filter. With these NPR IIR MDFT FBs as initial guess, PR IIR MDFT FBs with very good frequency characteristics can be obtained by solving a constrained nonlinear optimisation problem. Because the location of the poles can be approximately determined through model reduction, the efficiency and reliability of the design method is significantly improved. Design examples are given to demonstrate the effectiveness of the proposed method.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114981952","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: 5
Rough segmentation of natural color images using fuzzy-based hierarchical algorithm 基于模糊层次算法的自然彩色图像粗分割
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1353936
J. Maeda, S. Saga, Yukinori Suzuki
{"title":"Rough segmentation of natural color images using fuzzy-based hierarchical algorithm","authors":"J. Maeda, S. Saga, Yukinori Suzuki","doi":"10.1109/MWSCAS.2004.1353936","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1353936","url":null,"abstract":"This paper proposes rough segmentation of natural color images using fuzzy-based hierarchical algorithm. Statistical geometrical features (SGF) are adopted as texture features and L*a*b* color space is used to represent a color feature. Fuzzy homogeneity decision makes a fusion of texture features and color features. Proposed hierarchical segmentation method based on the fuzzy homogeneity decision is performed in four stages: hierarchical splitting, local agglomerative merging, global agglomerative merging and pixelwise classification. Experiments on segmentation of natural color images are presented to verify the effectiveness of the proposed method in obtaining rough segmentation.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"495 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116170866","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
Multilevel interconnect-driven floorplanner 多层互连驱动的地板规划器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354024
Evangeline F. Y. Young, James Lau
{"title":"Multilevel interconnect-driven floorplanner","authors":"Evangeline F. Y. Young, James Lau","doi":"10.1109/MWSCAS.2004.1354024","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354024","url":null,"abstract":"As technology continues to scale down, the number of transistors on a chip has increased rapidly and interconnect delay has become a dominant factor of system performance. Scalability and routability are two major concerns in floorplanning. In this paper, we present a multilevel floorplanner that addresses these important issues: congestion estimation, buffer planning and scalability. Experimental results show that this integrated multilevel approach, not only can handle large size problems, but can also improve the routability of the solution significantly by considering the interconnect issues.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116485960","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
Automatic synthesis of IIR SC multistage decimators IIR SC多级分馏器的自动合成
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354350
Cheong Ngai, R. Martins
{"title":"Automatic synthesis of IIR SC multistage decimators","authors":"Cheong Ngai, R. Martins","doi":"10.1109/MWSCAS.2004.1354350","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354350","url":null,"abstract":"This paper presents an automated system for the design of IIR SC multistage decimators. Through the integration of different existing programs it provides a user-friendly interface that allows the implementation of IIR SC decimators from the top filter specifications down to the circuit layout. It allows the automated design of a cascade of decimator stages in order to obtain a sufficiently high ratio between the sampling frequency and the maximum signal frequency of interest, and also simplifies the circuit through the minimization of the silicon area. Two design examples are given to demonstrate the feasibility of this approach.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122157728","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
Active power filter with asymmetrical inverter legs for harmonic and reactive power compensation 具有非对称逆变腿的有源电力滤波器，用于谐波和无功补偿
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354149
B. Lin, Tsung-Yu Yang
{"title":"Active power filter with asymmetrical inverter legs for harmonic and reactive power compensation","authors":"B. Lin, Tsung-Yu Yang","doi":"10.1109/MWSCAS.2004.1354149","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354149","url":null,"abstract":"An asymmetrical voltage source inverter is proposed to operate as an active power filter to eliminate harmonics and compensate reactive power drawn from the nonlinear loads such that a sinusoidal line current is drawn from the ac source. Two inverter legs are used in the adopted circuit configuration. One inverter leg is operated in the line frequency and the other leg is operated in the high switching frequency to track the compensated current command. In the proposed control scheme a voltage compensator, a carrier-based current controller and a proportional integral based DC link controller are used to achieve balanced capacitor voltages, to track line current and to obtain a constant DC bus voltage, respectively. Based on the PWM control scheme a three-level voltage pattern is generated on the AC terminal of the inverter. Experimental results are provided to verify the effectiveness of the control scheme.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"89 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126110890","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
An effective floorplanning algorithm in mixed mode placement integrated with rectilinear-shaped optimization for soft blocks 结合直线形状优化的软块混合模式布局的有效平面规划算法
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354186
Changqi Yang, Xianlong Hong, H. Honghua Yang, Yongqiang Lu
{"title":"An effective floorplanning algorithm in mixed mode placement integrated with rectilinear-shaped optimization for soft blocks","authors":"Changqi Yang, Xianlong Hong, H. Honghua Yang, Yongqiang Lu","doi":"10.1109/MWSCAS.2004.1354186","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354186","url":null,"abstract":"Mixed mode placement (MMP) problem can be successfully solved by combining floorplanning and cell based placement according to circuit's hierarchy. Floorplanning is the key design stage for achieving optimum performance if virtual blocks (VB: Soft Block) in floorplanning are not restricted to only have rectangular shapes. In this paper, an effective floorplanning algorithm RSF used in MMP is presented to perform the rectilinear-shaped optimization for VBs. Our approach allows VBs to transform into rectilinear shapes without overlaps and selects the optimum shapes for them during topology optimization of normal floorplanning. It is based on the dead-space block assignment and pin allocation during the process of packing. It depends on the theoretic analysis on lower bound of net wire length in half perimeter mode which makes RSF result in shorter total wire length in floorplanning. Applied in MMP, RSF can improve the final performance of MMP.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126115484","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
Efficient comb-rotated sinc (RS) decimator with sharpened magnitude response 有效的梳状旋转sinc (RS)抽取器，具有锐化的幅度响应
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354105
G. Dolecek, S. Mitra
{"title":"Efficient comb-rotated sinc (RS) decimator with sharpened magnitude response","authors":"G. Dolecek, S. Mitra","doi":"10.1109/MWSCAS.2004.1354105","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354105","url":null,"abstract":"This paper presents a comb-rotated sine (RS) decimator with a sharpened magnitude response. The decimator is composed of two main sections. The first section is a cascaded comb decimator, while the second section is a cascade of a sharpened comb and a rotated sine (RS) decimator. Using the polyphase decomposition, the subfilters of the first section can be operated at lower rate, which depends on the down-sampling factor of the first section. Additionally, as the RS filter is in the second section, both multipliers of the RS filter work at the lower rate. The magnitude response of the proposed filter is improved by using the sharpened technique in the second section.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"372 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124656104","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: 11
Traveling control of the autonomous mobile wheel-chair DREAM-3 considering correction of the initial position 考虑初始位置修正的自主移动轮椅DREAM-3的行驶控制
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354330
M. Ohkita, R. Tamanaha, M. Okugumo, J. Tanaka, M. Ohki, A. Kimura
{"title":"Traveling control of the autonomous mobile wheel-chair DREAM-3 considering correction of the initial position","authors":"M. Ohkita, R. Tamanaha, M. Okugumo, J. Tanaka, M. Ohki, A. Kimura","doi":"10.1109/MWSCAS.2004.1354330","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354330","url":null,"abstract":"The aim to develop DREAM-3 is make it travel in indoor environments such as in hospitals and/or welfare facilities for their practical use and serve to take care of old people and physically handicapped person. The autonomous mobile robot DREAM-3 has loaded an environmental map for the safety driving, where various sensor information is integrated. In this paper, method to collect the initial position of the robot on the environmental map is described with the traveling control.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129906810","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
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