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A new continuation power flow based on Q-limit points 一种新的基于q极限点的连续潮流
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354163
N. Yorino, K. Koeda, Hua-qiang Li, Y. Zoka, H. Sasaki
{"title":"A new continuation power flow based on Q-limit points","authors":"N. Yorino, K. Koeda, Hua-qiang Li, Y. Zoka, H. Sasaki","doi":"10.1109/MWSCAS.2004.1354163","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354163","url":null,"abstract":"This paper proposes a new continuation power flow method tracing QV constraint exchange points (CEP), at which generators regulating voltages hit the reactive power limits. The proposed method is based on a predictor/corrector scheme to obtain CEPs in succession. The condition for Q-limit immediate instability is derived and used in the algorithm, where the stability of the obtained CEP is checked in each iteration. The point of collapse method is also combined in the algorithm to detect a saddle node bifurcation. The effectiveness of the proposed method is demonstrated through numerical examinations in IEEE 118 bus systems.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"59 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":"114376446","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
Robust high-speed low input impedance CMOS current comparator 鲁棒高速低输入阻抗CMOS电流比较器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1142/S0218126608004770
V. Kasemsuwan, S. Khucharoensin
{"title":"Robust high-speed low input impedance CMOS current comparator","authors":"V. Kasemsuwan, S. Khucharoensin","doi":"10.1142/S0218126608004770","DOIUrl":"https://doi.org/10.1142/S0218126608004770","url":null,"abstract":"In this paper, a robust high speed low input impedance CMOS current comparator is proposed. The circuit uses modified Wilson current-mirror to perform a current subtraction. Negative feedback is employed to reduce input impedances of the circuit. The diode connected transistors of the same type (NMOS) are used at the output making the circuit immune to the process variation. HSPICE is used to verify the circuit performance and the results show the propagation delay of 1.67 nsec with an average power dissipation of 0.63 mW using a standard 0.5 /spl mu/m CMOS technology for an input current of /spl plusmn/0.1 /spl mu/A at the supply voltage of 3 V. The input impedances of the proposed current comparator are 123 /spl Omega/ and 126 /spl Omega/ while the maximum output voltage variation is only 1.9%.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"485 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":"122179138","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: 12
Analytic estimation of cell extension with finite relaying capacity of relay nodes 中继节点中继容量有限时小区扩展的解析估计
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354197
R. Panta, K. Nakano, M. Sengoku, N. Umeda, S. Shinoda
{"title":"Analytic estimation of cell extension with finite relaying capacity of relay nodes","authors":"R. Panta, K. Nakano, M. Sengoku, N. Umeda, S. Shinoda","doi":"10.1109/MWSCAS.2004.1354197","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354197","url":null,"abstract":"In a cellular system with mobile nodes having relaying capability, if a mobile node lies in a region where it cannot be directly connected to base station, it can communicate with the base station by multihop path consisting of other nodes. As a result, coverage area of a cell is increased. This paper estimates the degree of cell extension considering mobility and relaying capacity of relay nodes.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"25 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":"122213717","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
A complex sphere decoder for space-time codes 时空码的复杂球体解码器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354244
Chen Liu, Zhen-yang Wu, Wu Zheng
{"title":"A complex sphere decoder for space-time codes","authors":"Chen Liu, Zhen-yang Wu, Wu Zheng","doi":"10.1109/MWSCAS.2004.1354244","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354244","url":null,"abstract":"ln this paper, we present a new sphere decoder for space-time block code (STBC) decoding. Because the decoder is based on complex sphere decoding, it can be applied to STBC decoding of any modulation constellation. In the decoder, we give a method for obtaining an initial decoding solution and the initial sphere radius from the initial decoding solution, the obtained initial radius is relatively small. During the process of decoding, we define a metric for sorting all elements in the candidate symbol set of each component and the elements are searched in the sequence, which speeds up the shrinkage of the sphere and reduces the decoding average computational complexity. Simulation results verify the efficiency of the decoder.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"47 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":"116827663","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
An efficient contour-based algorithm for binary video shape coding 一种有效的基于轮廓的二进制视频形状编码算法
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1353977
Lih-Yang Wang, Ching-Hui Lai
{"title":"An efficient contour-based algorithm for binary video shape coding","authors":"Lih-Yang Wang, Ching-Hui Lai","doi":"10.1109/MWSCAS.2004.1353977","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1353977","url":null,"abstract":"In this paper, an efficient contour-based coding algorithm is proposed to handle arbitrarily shape video objects in MPEG-4. The proposed algorithm is based on the powerfulness of differential chain code, which is well-known for its simplicity and high coding efficiency. We improve it by considering the repeating groups of symbols, and use a run length coding strategy to further reduce the coding redundancy. Experimental results show that the proposed algorithm has an excellent coding efficiency.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"55 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":"117299179","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
Modified sign Haar transform 修正符号哈尔变换
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354109
B. Falkowski, Shixing Yan
{"title":"Modified sign Haar transform","authors":"B. Falkowski, Shixing Yan","doi":"10.1109/MWSCAS.2004.1354109","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354109","url":null,"abstract":"Modified sign Haar transform with sign Walsh-like structure is introduced in this article. This nonlinear transform converts binary/ternary vectors into digital spectral domain and is invertible. Recursive definitions for the calculation of this transform have been developed. With its unique and isomorphic properties, this transform is suitable for security coding in a communication system.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"75 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":"117305324","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
Design of a 1.8 V high frequency CMOS variable gain amplifier with a novel dB-linear gain structure 1.8 V高频CMOS可变增益放大器的设计，具有新颖的db线性增益结构
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1353913
Wei Hu, Seunghyun Song, Bongryul Choi, Jae-Whui Kim
{"title":"Design of a 1.8 V high frequency CMOS variable gain amplifier with a novel dB-linear gain structure","authors":"Wei Hu, Seunghyun Song, Bongryul Choi, Jae-Whui Kim","doi":"10.1109/MWSCAS.2004.1353913","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1353913","url":null,"abstract":"In this paper, a novel dB-linear gain structure is introduced. Based on this structure, a high frequency and high dynamic range variable gain amplifier (VGA) is presented. The VGA circuit is designed for a satellite receiver application, operating from 950 MHz to 2.15 GHz. Simulation results were achieved using 0.18 /spl mu/m CMOS technology, and shown a good dB-linear control characteristic with dynamic gain range of 85 dB.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"76 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":"128385721","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
Parameter estimation of chirp signals in random noise using Wigner distribution 随机噪声中啁啾信号的维格纳分布参数估计
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354120
H. Ijima, A. Ohsumi, I. Djurović
{"title":"Parameter estimation of chirp signals in random noise using Wigner distribution","authors":"H. Ijima, A. Ohsumi, I. Djurović","doi":"10.1109/MWSCAS.2004.1354120","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354120","url":null,"abstract":"Incorporating with the realizations of Wigner distribution, an effective method of estimating unknown parameters of the received noisy chirp signals is proposed. The method is tested by simulations for superimposed chirp signals to show the efficacy.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"111 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":"128620032","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
Bifurcation sets of PLL equation with piecewise-linear PD characteristics 分段线性PD特征的PLL方程分岔集
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354229
W. Ohno, T. Endo
{"title":"Bifurcation sets of PLL equation with piecewise-linear PD characteristics","authors":"W. Ohno, T. Endo","doi":"10.1109/MWSCAS.2004.1354229","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354229","url":null,"abstract":"In this paper we investigate the practical significance of homoclinic points in the PLL equation. We obtained parameter regions of homoclinic points in the PLL equation in our previous papers. It is well-known that if a system has homoclinic points, flows of the system present chaotic behavior at least in its transient state. We confirm this fact concretely by drawing initial condition planes for various parameter values with and without homoclinic points. As a result, it is found that for parameters without homoclinic points, the basin boundary of each attractor is smooth, however for those with homoclinic points it is more or less fractal. Further, for initial conditions chosen in fractal regions flows present chaotic transient behavior before settling in an attractor.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"7 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":"130376332","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
Three-phase switching mode rectifier based on switch-clamped topology 基于开关钳位拓扑的三相开关整流器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354150
B. Lin, Yuan-An Ou
{"title":"Three-phase switching mode rectifier based on switch-clamped topology","authors":"B. Lin, Yuan-An Ou","doi":"10.1109/MWSCAS.2004.1354150","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354150","url":null,"abstract":"A three-phase two-leg switching mode rectifier is presented to achieve power factor correction, dc-link voltage regulation and harmonic reduction. The proposed rectifier is based on the conventional three-phase two-leg H-bridge rectifier with two ac switches to perform unipolar PWM waveform on the ac terminal voltage of the rectifier instead of bipolar PWM waveform on the conventional circuit. There are four active switches with voltage stress of dc bus voltage and two ac switches with voltage stress of half the dc side voltage in the proposed rectifier. The mathematical model of the rectifier is derived and the control scheme is provided in the paper. Computer simulations results are provided to verify the performance characteristics of the proposed control scheme.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"6 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":"130490410","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
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