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A comparative study of CMOS LC VCO topologies for wide-band multi-standard transceivers 宽带多标准收发器CMOS LC - VCO拓扑结构的比较研究
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354280
A. Fard, T. Johnson, M. Linder, D. Åberg
{"title":"A comparative study of CMOS LC VCO topologies for wide-band multi-standard transceivers","authors":"A. Fard, T. Johnson, M. Linder, D. Åberg","doi":"10.1109/MWSCAS.2004.1354280","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354280","url":null,"abstract":"In this paper a comparison between two widely used VCO topologies, in standard 0.35 /spl mu/m CMOS technology is presented. The VCOs, based on an NMOS and a complementary structure, are designed to operate in a wide band frequency range suited for future multi-standard WLAN radios. The comparisons are carried out from the perspectives of tuning range, power dissipation and phase noise. The results, which are based on simulations, show that both circuits are applicable for the targeted operation band of 4.5-6.5 GHz, while the complementary VCO shows less power consumption and lower phase noise levels.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"73 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":"131683282","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: 16
Blind signal recovery in multiuser MIMO-OFDM system 多用户MIMO-OFDM系统中的盲信号恢复
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354239
Bin Guo, Hai-Hsing Lin, K. Yamashita
{"title":"Blind signal recovery in multiuser MIMO-OFDM system","authors":"Bin Guo, Hai-Hsing Lin, K. Yamashita","doi":"10.1109/MWSCAS.2004.1354239","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354239","url":null,"abstract":"A blind signal recovery method for MIMO-OFDM system is proposed. This method is based on an application of existing blind source separation (BSS) algorithms to the detection of the signals in OFDM system with multiple transmit-and-receive antenna, where the transmission can be treated as a set of instantaneous mixtures from the frequency bin (FB) viewpoint. Although the BSS algorithm can successfully separate different user signals at FB level, the permutation indeterminacy nature of BSS algorithm hinder the signal recomposition from the separated signals. A method taking advantage of the statistic characteristics of the transmitted signals is proposed to overcome these obstacles. Also the validity of the proposed method is demonstrated by computer simulations.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"34 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":"128873328","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
A development of a spheroidal joint actuator using gyro principle 利用陀螺原理研制球面关节作动器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354314
M. Matsuda, Y. Yano, J. Tanaka, R. Kawabata, T. Sakabe
{"title":"A development of a spheroidal joint actuator using gyro principle","authors":"M. Matsuda, Y. Yano, J. Tanaka, R. Kawabata, T. Sakabe","doi":"10.1109/MWSCAS.2004.1354314","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354314","url":null,"abstract":"We propose a spheroidal joint actuator using gyroscopic principle. This actuator has two features, which are the wide-range mobility of the multi DOF and releasing the overloaded external torque softly. The humanoid robots today, use an axis turn motor and various sensors for the parts of each joint. In the way of present situations, it is difficult to realize the motion ability like a human shoulder. Spheroidal joint actuators are used for a part of shoulder. In this paper, we describe a kinematics model and performance characteristics of a two-DOF actuator made as experiment constructed by a ball-and-socket joint and gyroscope, and prove result of experiment and consideration of a one-DOF actuator of simple model. By the trial production of spheroidal joint actuators, and various characteristic examinations, verify that it could operate. The flywheel characteristic was in agreement with the application kinematics model. At the torque characteristic examination, the maximum value of output torque is 2 kgf-cm.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"10 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":"126379203","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
Structural learning of multilayer feed forward neural networks for continuous valued functions 连续值函数多层前馈神经网络的结构学习
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354295
Y. Manabe, B. Chakraborty, H. Fujita
{"title":"Structural learning of multilayer feed forward neural networks for continuous valued functions","authors":"Y. Manabe, B. Chakraborty, H. Fujita","doi":"10.1109/MWSCAS.2004.1354295","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354295","url":null,"abstract":"Multilayer feed forward networks with back propagation learning are widely used for function approximation but the learned networks rarely reveal the input output relationship explicitly. Structural learning methods are proposed to optimize the network topology as well as to add interpretation to its internal behaviour. Effective structural learning approaches for optimization and internal interpretation of the neural networks like structural learning with forgetting (SLF) or fast integration learning (FIL) have been proved useful for problems with binary outputs. In this work a new structural learning method based on modification of SLF and FIL has been proposed for problems with continuous valued outputs. The effectiveness of the proposed learning method has been demonstrated by simulation experiments with continuous valued functions.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"95 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":"125715909","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
14 b, 50 MS/s CMOS front-end sample and hold module dedicated to a pipelined ADC 14b, 50 MS/s CMOS前端采样和保持模块专用于流水线ADC
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354000
Y. Chouia, K. El-Sankary, A. Saleh, M. Sawan, F. Ghannouchi
{"title":"14 b, 50 MS/s CMOS front-end sample and hold module dedicated to a pipelined ADC","authors":"Y. Chouia, K. El-Sankary, A. Saleh, M. Sawan, F. Ghannouchi","doi":"10.1109/MWSCAS.2004.1354000","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354000","url":null,"abstract":"A high performance sample-and-hold (S/H) circuit intended a fast pipelined analog to digital converter was designed and implemented using a 0.18 /spl mu/m CMOS process, the sampling rate of the proposed S/H module is 50 MS/s with a bandwidth of 20 MHz and a power supply of 1.8 V. Using switched capacitor differential topology, double bootstrapped switches and several native transistors, we optimized with VerilogA models the amplifier and the switches to end up with the optimized high performance circuit. The post layout simulation allowed to reach an SFDR of 88.6 dB for 20 MHz input signal. The circuit was integrated to other building blocks to construct a pipelined ADC which is now under fabrication.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"23 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":"125915769","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
An adaptive state space segmentation for reinforcement learning using fuzzy-ART neural network 基于模糊- art神经网络的强化学习自适应状态空间分割
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354305
T. Kamio, S. Soga, H. Fujisaka, K. Mitsubori
{"title":"An adaptive state space segmentation for reinforcement learning using fuzzy-ART neural network","authors":"T. Kamio, S. Soga, H. Fujisaka, K. Mitsubori","doi":"10.1109/MWSCAS.2004.1354305","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354305","url":null,"abstract":"Reinforcement learning has been applied to a variety of physical control tasks. They include many purposive tasks with continuous state variables and discrete-valued actions. The state space segmentation is one of the most important problems for such tasks. However, if they are not given serious damages by \"a state-action deviation problem\", the conventional methods are unsuitable for them in terms of the cost-performance and the simplicity of the algorithm. To overcome this problem, we propose a new adaptive state space segmentation method based on fuzzy-ART neural network.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"50 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":"126609334","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: 17
Lossless coding of color quantized images based on pseudo distance 基于伪距离的彩色量化图像无损编码
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1353972
N. Kuroki, T. Yamane, M. Numa
{"title":"Lossless coding of color quantized images based on pseudo distance","authors":"N. Kuroki, T. Yamane, M. Numa","doi":"10.1109/MWSCAS.2004.1353972","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1353972","url":null,"abstract":"As pixels in quantized images such as GIF formatted images with 256 colors are usually represented by index numbers in a color palette, it is impossible to get high efficient compression by using conventional predictive coding to such images. In this paper, a novel predictive coding approach is proposed for images with quantized colors. In this approach, the prediction error is not an index number difference between an original color and its predicted color, but a value called as \"pseudo distance\" which is related to the Euclidian distance between these two colors in the 3-D color space. As the pseudo distance is small when the predicted color is perceptually close to the original color, the distribution of the pseudo distance is peak-like resulting in low entropy. Preliminary computer simulation results show that the proposed approach outperforms the index based linear prediction.","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":"126846236","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: 13
Pre-distortion-compensated up-converting OFDM power amplifier of 2W at 7GHz for digital TV broadcasting service 用于数字电视广播业务的2W预失真补偿上转换OFDM功率放大器
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354251
T. Abe, K. Haeiwa, I. Murasaki, T. Yoshida, J. Togashi
{"title":"Pre-distortion-compensated up-converting OFDM power amplifier of 2W at 7GHz for digital TV broadcasting service","authors":"T. Abe, K. Haeiwa, I. Murasaki, T. Yoshida, J. Togashi","doi":"10.1109/MWSCAS.2004.1354251","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354251","url":null,"abstract":"The linear- and temperature-compensated negative feedback loop of the GaAs FET SHF power amplifier operating at 7GHz greatly improved the non-linear distortion as well as the improved thermal stability in this class-A amplifier when used in the up-converting amplifier with an IF(37.5MHz) input port at -40dBm. The inter-modulation to the third harmonic frequency for the OFDM TV signals was improved by a factor of 15dB, and the equivalent CNR was improved by a factor of 9.6dB at 7GHz. The result was satisfactory. This up-converting amplifier of new type was designed to be employed in the OFDM digital TV broadcasting facilities for new terrestrial digital TV broadcasting service at 7GHz. It will be useful also for the wireless communication facilities.","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":"121068472","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 model of conversation exchange dynamics for detection of epidemic-style network attacks 用于检测流行型网络攻击的会话交换动态模型
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354334
S. Mylavarapu, J. Zachary, D. Ettlich, J. McEachen, D. Ford
{"title":"A model of conversation exchange dynamics for detection of epidemic-style network attacks","authors":"S. Mylavarapu, J. Zachary, D. Ettlich, J. McEachen, D. Ford","doi":"10.1109/MWSCAS.2004.1354334","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354334","url":null,"abstract":"Epidemic-style network attacks, such as worms, have increased in frequency over the past several years as computer networks have grown in bandwidth and scope. Mechanisms to contain these types of attacks depend on rapid and effective detection of their existence, which corresponds to anomalous network traffic behavior. These behaviors are typically associated with denial of service, probing, and buffer overflow attacks. We present a model called conversation exchange dynamics (CED) and analyze its ability to detect network anomalies by observing anomalous packets amongst traffic generated in a controlled test environment. We present configuration issues and show the successful ability of this model to detect anomalous packets and even network attacks that exhibit behavior pathologies similar to network worms.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"45 16 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":"121097706","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
Quadrature mirror filter design without transition specification 无过渡规范的正交镜滤波器设计
The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04. Pub Date : 2004-07-25 DOI: 10.1109/MWSCAS.2004.1354099
Y. Law, C. Kok
{"title":"Quadrature mirror filter design without transition specification","authors":"Y. Law, C. Kok","doi":"10.1109/MWSCAS.2004.1354099","DOIUrl":"https://doi.org/10.1109/MWSCAS.2004.1354099","url":null,"abstract":"The design of two channel linear phase quadrature mirror filter (QMF) banks is considered with constraints on the peaks of the reconstruction error and that of the subband filter ripple sizes. We further considered the design specification without explicitly specified transition band for the subband filters. An iterative algorithm is proposed to design QMF banks that can incorporate with various design constraints. We have suggested the possible design tradeoff between transition band bandwidth and the ripple size of the subband subband filter and/or the reconstruction error. Various design examples are presented to illustrate the versatility of the digital QMF banks obtained by the proposed design method. The algorithm is proved to converge and was found to converge efficiently in all the simulations.","PeriodicalId":185817,"journal":{"name":"The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04.","volume":"26 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":"116237133","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
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