Pub Date : 2009-07-09DOI: 10.1109/ISSCS.2009.5206169
C. Botan, M. Răţoi, F. Ostafi, V. Horga
Certain aspects referring to the energy consumptions and losses in the servo drive systems with permanent synchronous motors are presented. The optimal control from the energetic point of view is presented and a structure for suboptimal control is proposed. This structure allows a simple implementation.
{"title":"Optimal control of a servo drive system with a PMSM","authors":"C. Botan, M. Răţoi, F. Ostafi, V. Horga","doi":"10.1109/ISSCS.2009.5206169","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206169","url":null,"abstract":"Certain aspects referring to the energy consumptions and losses in the servo drive systems with permanent synchronous motors are presented. The optimal control from the energetic point of view is presented and a structure for suboptimal control is proposed. This structure allows a simple implementation.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130689700","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206167
D. Mic, A. Tisan, S. Oniga, C. Lung, Sebastian Sabau
The current paper is meant to display a development procedure for a Simulink/Matlab library with parameterized components which can be implemented in FPGA circuits. The usage of the library components shall ease and shorten the time for design and hardware implementation of a loop control for direct current motors. The System Generator Toolbox is to be used as a work environment in designing the parameterized blocks, due to its good fitting in the Matlab / Simulink environment, familiar to the control systems designers and which, together with the ISE Xilinx environment cover all the designing stages.
{"title":"The development of a Simulink library with FPGA compatible parametric components for electric machines control","authors":"D. Mic, A. Tisan, S. Oniga, C. Lung, Sebastian Sabau","doi":"10.1109/ISSCS.2009.5206167","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206167","url":null,"abstract":"The current paper is meant to display a development procedure for a Simulink/Matlab library with parameterized components which can be implemented in FPGA circuits. The usage of the library components shall ease and shorten the time for design and hardware implementation of a loop control for direct current motors. The System Generator Toolbox is to be used as a work environment in designing the parameterized blocks, due to its good fitting in the Matlab / Simulink environment, familiar to the control systems designers and which, together with the ISE Xilinx environment cover all the designing stages.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129338818","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206187
Adrian Lodin, S. Demea
The goal of this study is to present a system which use correlation between medical pathology and different sectors from the surface of the iris. A computerized iris texture and color analysis reveals texture regions which offer useful information. Locations of those regions upon a segmented iridology charts point out an interrelation between map sectors and the projection of the internal body system. The final automatically generated diagnosis needs user approval, thus making the system semi-automatic.
{"title":"Design of an iris-based medical diagnosis system","authors":"Adrian Lodin, S. Demea","doi":"10.1109/ISSCS.2009.5206187","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206187","url":null,"abstract":"The goal of this study is to present a system which use correlation between medical pathology and different sectors from the surface of the iris. A computerized iris texture and color analysis reveals texture regions which offer useful information. Locations of those regions upon a segmented iridology charts point out an interrelation between map sectors and the projection of the internal body system. The final automatically generated diagnosis needs user approval, thus making the system semi-automatic.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127778112","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206190
A. Nedelcu, Daniel Ghita, A. Enescu, C. Anghel
This paper represents an overview of the main sphere decoders used in MIMO (Multiple Input Multiple Output) spatial multiplexing communication systems. The family of sphere decoders addressed in this paper exhibits fixed throughput, regardless of the radio channel conditions. The algorithms are compared with respect to their complexity and performances when used with a soft Viterbi channel decoder. The paper concludes with the criteria for choosing the best algorithms in a given configuration and for specific modulation scheme.
{"title":"An overview of soft-output sphere decoders with constant throughput","authors":"A. Nedelcu, Daniel Ghita, A. Enescu, C. Anghel","doi":"10.1109/ISSCS.2009.5206190","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206190","url":null,"abstract":"This paper represents an overview of the main sphere decoders used in MIMO (Multiple Input Multiple Output) spatial multiplexing communication systems. The family of sphere decoders addressed in this paper exhibits fixed throughput, regardless of the radio channel conditions. The algorithms are compared with respect to their complexity and performances when used with a soft Viterbi channel decoder. The paper concludes with the criteria for choosing the best algorithms in a given configuration and for specific modulation scheme.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125325329","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206197
A. Djugova, J. Radic, M. Videnovic-Misic
In this paper a two-stage low noise amplifier (LNA) in 0.35 µm BiCMOS technology is presented. The first LNA stage is a common source amplifier in the cascode configuration where source inductor degeneration is used for narrowband input matching at 1.57542 GHz. Additional common source amplifier, as the second LNA stage, is added in order to increase total forward gain (S21) of the LNA. Optimized LNA has −12.01 dB input return loss (S11), high reverse isolation S12 = −39.19 dB, very high voltage gain S21 = 23.83 dB, output return loss S22 = −10.61 dB, noise figure of 2.035 dB and power consumption of 9.9 mA at 3.3 V. The presented LNA offers circuit stability parameters B1f = 953.3 m and Kf = 2.558 Significance of the process and mismatch variation and its influence on circuit performance has been demonstrated with Monte Carlo Analysis.
{"title":"Circuit and process parameters issue for 1.57542GHz low noise amplifier in 0.35µm BiCMOS technology","authors":"A. Djugova, J. Radic, M. Videnovic-Misic","doi":"10.1109/ISSCS.2009.5206197","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206197","url":null,"abstract":"In this paper a two-stage low noise amplifier (LNA) in 0.35 µm BiCMOS technology is presented. The first LNA stage is a common source amplifier in the cascode configuration where source inductor degeneration is used for narrowband input matching at 1.57542 GHz. Additional common source amplifier, as the second LNA stage, is added in order to increase total forward gain (S<inf>21</inf>) of the LNA. Optimized LNA has −12.01 dB input return loss (S<inf>11</inf>), high reverse isolation S<inf>12</inf> = −39.19 dB, very high voltage gain S<inf>21</inf> = 23.83 dB, output return loss S<inf>22</inf> = −10.61 dB, noise figure of 2.035 dB and power consumption of 9.9 mA at 3.3 V. The presented LNA offers circuit stability parameters B<inf>1f</inf> = 953.3 m and K<inf>f</inf> = 2.558 Significance of the process and mismatch variation and its influence on circuit performance has been demonstrated with Monte Carlo Analysis.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125507221","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206111
R. Matei, P. Ungureanu
This paper proposes an analytical design method for a class of 2D filters, namely elliptical-shaped zero-phase filters. These include as a particular case the circularly-symmetric filters, and also the orientation-selective filters with a narrow frequency response along a direction in the frequency plane specified by a given angle. These filters are based on zero-phase low-pass 1D prototypes. We consider here maximally-flat filters which introduce minimum errors in the pass-band, and also very selective prototypes. Using specific frequency transformations the desired 2D filters are obtained, which are very efficient and preserve the properties of their 1D counterparts. Simulation results on some test images are provided.
{"title":"Image processing using elliptically-shaped filters","authors":"R. Matei, P. Ungureanu","doi":"10.1109/ISSCS.2009.5206111","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206111","url":null,"abstract":"This paper proposes an analytical design method for a class of 2D filters, namely elliptical-shaped zero-phase filters. These include as a particular case the circularly-symmetric filters, and also the orientation-selective filters with a narrow frequency response along a direction in the frequency plane specified by a given angle. These filters are based on zero-phase low-pass 1D prototypes. We consider here maximally-flat filters which introduce minimum errors in the pass-band, and also very selective prototypes. Using specific frequency transformations the desired 2D filters are obtained, which are very efficient and preserve the properties of their 1D counterparts. Simulation results on some test images are provided.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125754409","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206161
G. Zaharia, V. Munteanu, D. Tarniceriu
This paper presents new results of the D-ary Huffman tree. These results are used to prove that the maximum value of the average codeword length is obtained for the uniform distribution. The upper bound computed in this paper is higher than the value obtained for Huffman codes with minimum redundancy.
{"title":"Tight bounds on the codeword lengths and average codeword length for D-ary Huffman codes - Part 1","authors":"G. Zaharia, V. Munteanu, D. Tarniceriu","doi":"10.1109/ISSCS.2009.5206161","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206161","url":null,"abstract":"This paper presents new results of the D-ary Huffman tree. These results are used to prove that the maximum value of the average codeword length is obtained for the uniform distribution. The upper bound computed in this paper is higher than the value obtained for Huffman codes with minimum redundancy.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126865398","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206202
L. Stanciu, C. Stanciu
In this paper a design method of the digital audio equalizers with small ringing impulse responses, by using symmetric B-spline functions and spline polynomials, is presented. It is important to have a flat frequency response for the audio equalizer. The solution is to approximate the response of each frequency band by using spline functions, that insures continuous superior order derivatives. These small ringings give a natural audition. A tradeoff between frequency band independence, small ringings of the impulse response and desired frequency response, must be made.
{"title":"Digital audio equalizers with flat frequency response","authors":"L. Stanciu, C. Stanciu","doi":"10.1109/ISSCS.2009.5206202","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206202","url":null,"abstract":"In this paper a design method of the digital audio equalizers with small ringing impulse responses, by using symmetric B-spline functions and spline polynomials, is presented. It is important to have a flat frequency response for the audio equalizer. The solution is to approximate the response of each frequency band by using spline functions, that insures continuous superior order derivatives. These small ringings give a natural audition. A tradeoff between frequency band independence, small ringings of the impulse response and desired frequency response, must be made.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127720973","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206085
A. Apatean, A. Rogozan, A. Bensrhair
We propose the information fusion of visible and infrared images for a pedestrian-vehicle SVM-based classification. Different types of fusion methods are presented: data fusion, feature fusion, matching score fusion and decision fusion. Data - level fusion assumes that the raw information is combined at the pixel level. The fusion at the feature level produces a feature vector integrating both visual and infrared information. Matching score fusion and decision fusion combine matching scores or decisions of individual obstacle recognition modules. Comparative results showed that fusion-based obstacle recognition techniques outperformed individual visual and infrared obstacle recognizers. An important advantage of these fusion-based systems is their possibility to adapt to the environmental illumination conditions due to a weighting parameter which also controls the system's final decision. Different feature extraction and feature selection algorithms have been investigated in order to retain the best suited features for the classification process.
{"title":"Information fusion for obstacle recognition in visible and infrared images","authors":"A. Apatean, A. Rogozan, A. Bensrhair","doi":"10.1109/ISSCS.2009.5206085","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206085","url":null,"abstract":"We propose the information fusion of visible and infrared images for a pedestrian-vehicle SVM-based classification. Different types of fusion methods are presented: data fusion, feature fusion, matching score fusion and decision fusion. Data - level fusion assumes that the raw information is combined at the pixel level. The fusion at the feature level produces a feature vector integrating both visual and infrared information. Matching score fusion and decision fusion combine matching scores or decisions of individual obstacle recognition modules. Comparative results showed that fusion-based obstacle recognition techniques outperformed individual visual and infrared obstacle recognizers. An important advantage of these fusion-based systems is their possibility to adapt to the environmental illumination conditions due to a weighting parameter which also controls the system's final decision. Different feature extraction and feature selection algorithms have been investigated in order to retain the best suited features for the classification process.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114328905","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 : 2009-07-09DOI: 10.1109/ISSCS.2009.5206212
I. Ciocoiu
Foveation enables the definition of a proper mask that will modulate the coefficients given by the Discrete Wavelet Transform of an ECG record. The mask is spatially selective and provides maximum accuracy around specific regions of interest. Subsequent denoising and coefficient quantization is further combined with a lossless compression technique in order to provide high compression ratios at low reconstruction errors. Experimental results reported on a number of MIT-BIH records show improved performances over existing solutions.
{"title":"ECG signal compression using wavelet foveation","authors":"I. Ciocoiu","doi":"10.1109/ISSCS.2009.5206212","DOIUrl":"https://doi.org/10.1109/ISSCS.2009.5206212","url":null,"abstract":"Foveation enables the definition of a proper mask that will modulate the coefficients given by the Discrete Wavelet Transform of an ECG record. The mask is spatially selective and provides maximum accuracy around specific regions of interest. Subsequent denoising and coefficient quantization is further combined with a lossless compression technique in order to provide high compression ratios at low reconstruction errors. Experimental results reported on a number of MIT-BIH records show improved performances over existing solutions.","PeriodicalId":277587,"journal":{"name":"2009 International Symposium on Signals, Circuits and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122649050","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}
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