Pub Date : 2003-07-10DOI: 10.1109/SCS.2003.1226971
C. Grava, V. Buzuloiu, A. Grava
In this paper, a comparative study of the motion estimation methods in image sequences is presented. These methods are used with the aim to obtain the movement information as a dense field of movement vectors. This information can be used after that spatio-temporal interpolation of image sequences. The considerations regarding the particularities of the motion estimation methods, as well as their disadvantages and some alternative solutions will be presented.
{"title":"Comparative study of motion estimation methods for spatio-temporal interpolation","authors":"C. Grava, V. Buzuloiu, A. Grava","doi":"10.1109/SCS.2003.1226971","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226971","url":null,"abstract":"In this paper, a comparative study of the motion estimation methods in image sequences is presented. These methods are used with the aim to obtain the movement information as a dense field of movement vectors. This information can be used after that spatio-temporal interpolation of image sequences. The considerations regarding the particularities of the motion estimation methods, as well as their disadvantages and some alternative solutions will be presented.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115568147","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227137
D. Cafagna, G. Grassi
This paper deals with dynamic properties and generation of new multi-scroll attractors in two coupled Chua's circuits with sine-type nonlinearities. In particular, the proposed approach enables hyperchaotic nxm-scroll attractor to be systematically generated by combining the chaotic n-scroll attractor related to the first circuit with the chaotic m-scroll attractor related to second circuit. Finally, some examples are reported to illustrate the capability of the proposed technique.
{"title":"Dynamic properties and generation of new hyperchaotic multi-scroll attractors","authors":"D. Cafagna, G. Grassi","doi":"10.1109/SCS.2003.1227137","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227137","url":null,"abstract":"This paper deals with dynamic properties and generation of new multi-scroll attractors in two coupled Chua's circuits with sine-type nonlinearities. In particular, the proposed approach enables hyperchaotic nxm-scroll attractor to be systematically generated by combining the chaotic n-scroll attractor related to the first circuit with the chaotic m-scroll attractor related to second circuit. Finally, some examples are reported to illustrate the capability of the proposed technique.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116128130","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227000
L. Vornicu, L. Dimitriu
A method to enhance the data transmission performances in a real-time complex system is presented. It uses serial multiplexed buses that assure high performances in data transmission concerning a minimum rate of errors and a reduced latency according to L. Vornicu (2000) and R. Jurgen (1995). The reliability can be increased based on redundancy feature of bus system used. The method could be interesting from designer's point of view, but also could be useful for the users, giving a new approach in multiplex wiring real-time complex system analysis and design.
{"title":"A method to enhance data transfer performances in a real-time complex system using serial multiplexed bus","authors":"L. Vornicu, L. Dimitriu","doi":"10.1109/SCS.2003.1227000","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227000","url":null,"abstract":"A method to enhance the data transmission performances in a real-time complex system is presented. It uses serial multiplexed buses that assure high performances in data transmission concerning a minimum rate of errors and a reduced latency according to L. Vornicu (2000) and R. Jurgen (1995). The reliability can be increased based on redundancy feature of bus system used. The method could be interesting from designer's point of view, but also could be useful for the users, giving a new approach in multiplex wiring real-time complex system analysis and design.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125461557","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227082
A. I. Galarniotis, A. Tsakoumis, P. Fessas, S. Vladov, V. Mladenov
Finite impulse response (FIR) neural network and Elman neural network have been compared in electric load prediction. An FIR neural network has been trained with a temporal back-propagation learning algorithm and the results obtained showed that the effectiveness of the algorithm is more important than the applied network model. The comparison between both networks and the standard approach with Multilayer perceptron (MLP) network, demonstrates that the FIR network acts adequately. It performs better than the Elman network. Both networks perform better than the MLP network.
{"title":"Using Elman and FIR neural networks for short term electric load forecasting","authors":"A. I. Galarniotis, A. Tsakoumis, P. Fessas, S. Vladov, V. Mladenov","doi":"10.1109/SCS.2003.1227082","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227082","url":null,"abstract":"Finite impulse response (FIR) neural network and Elman neural network have been compared in electric load prediction. An FIR neural network has been trained with a temporal back-propagation learning algorithm and the results obtained showed that the effectiveness of the algorithm is more important than the applied network model. The comparison between both networks and the standard approach with Multilayer perceptron (MLP) network, demonstrates that the FIR network acts adequately. It performs better than the Elman network. Both networks perform better than the MLP network.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126833564","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226980
G. Grassi, D. Cafagna
In this paper modeling, analysis and design of a class of Cellular Neural Networks (CNNs) are discussed. In particular, a discrete-time CNN model is introduced and the global asymptotic stability of its equilibrium point is analyzed. By taking into account such stability results, a novel technique for designing associative memories is developed. The objective is achieved by satisfying frequency domain stability criteria via feedback parameters related to circulant matrices. The approach, by generating CNN's conditions, enables both hetero-associative and auto-associative memories to be designed. Finally, two examples highlight the capabilities of the designed networks in storing and retrieving information.
{"title":"Modeling, analysis and design of a class of cellular neural networks","authors":"G. Grassi, D. Cafagna","doi":"10.1109/SCS.2003.1226980","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226980","url":null,"abstract":"In this paper modeling, analysis and design of a class of Cellular Neural Networks (CNNs) are discussed. In particular, a discrete-time CNN model is introduced and the global asymptotic stability of its equilibrium point is analyzed. By taking into account such stability results, a novel technique for designing associative memories is developed. The objective is achieved by satisfying frequency domain stability criteria via feedback parameters related to circulant matrices. The approach, by generating CNN's conditions, enables both hetero-associative and auto-associative memories to be designed. Finally, two examples highlight the capabilities of the designed networks in storing and retrieving information.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668933","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227103
M. Cinteza, I. Marghescu, A. Enescu
The initial search procedure in WCDMA is used to identify the scrambling code used by the base station that has the lowest path loss coefficient of the received signal, among all the other base stations. Before this action, the slot synchronization, frame synchronization and code-group identification must be performed. This paper deals with an optimized algorithm for the initial search procedure performed by a mobile station every time when it wants to access network services in UMTS. We have focused on the second step of the initial search procedure: frame synchronization and code-group identification. The algorithm minimizes the acquiring time of the scrambling code group, further used for identify the scrambling code of the selected base station.
{"title":"Initial cell search procedure in WCDMA - an improved algorithm for FDD","authors":"M. Cinteza, I. Marghescu, A. Enescu","doi":"10.1109/SCS.2003.1227103","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227103","url":null,"abstract":"The initial search procedure in WCDMA is used to identify the scrambling code used by the base station that has the lowest path loss coefficient of the received signal, among all the other base stations. Before this action, the slot synchronization, frame synchronization and code-group identification must be performed. This paper deals with an optimized algorithm for the initial search procedure performed by a mobile station every time when it wants to access network services in UMTS. We have focused on the second step of the initial search procedure: frame synchronization and code-group identification. The algorithm minimizes the acquiring time of the scrambling code group, further used for identify the scrambling code of the selected base station.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128018026","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227138
D. Cafagna, G. Grassi
This paper deals with hyperchaos synchronization via a scalar signal. By exploiting observer design and time-division multiplexing of the transmitted signal, a novel framework for synchronizing hyperchaotic circuits with one or several non-linearities is proposed. The approach is successfully applied to 8th order circuits with one non-linearity as well as to 6th order circuits with two non-linearities.
{"title":"Synchronizing hyperchaotic systems with several non-linearities: observer design and time-division multiplexing of the scalar signal","authors":"D. Cafagna, G. Grassi","doi":"10.1109/SCS.2003.1227138","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227138","url":null,"abstract":"This paper deals with hyperchaos synchronization via a scalar signal. By exploiting observer design and time-division multiplexing of the transmitted signal, a novel framework for synchronizing hyperchaotic circuits with one or several non-linearities is proposed. The approach is successfully applied to 8th order circuits with one non-linearity as well as to 6th order circuits with two non-linearities.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126121514","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226999
L. Dimitriu, M. Lucanu, C. Aghion, O. Ursaru
The paper presents the control principle for a PWM single-phase inverter, using the capabilities of 80C552 microcontroller. The basics of control program are described. How the characteristics of the presented inverter essentially depend on the features of control system, only few microcontrollers can match the necessities for high performances. One of them is Philips 80C552. The powerful T2 timer gives its useful feature in our application.
{"title":"Control with microcontroller for PWM single-phase inverter","authors":"L. Dimitriu, M. Lucanu, C. Aghion, O. Ursaru","doi":"10.1109/SCS.2003.1226999","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226999","url":null,"abstract":"The paper presents the control principle for a PWM single-phase inverter, using the capabilities of 80C552 microcontroller. The basics of control program are described. How the characteristics of the presented inverter essentially depend on the features of control system, only few microcontrollers can match the necessities for high performances. One of them is Philips 80C552. The powerful T2 timer gives its useful feature in our application.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134575551","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 : 2003-07-10DOI: 10.1109/SCS.2003.1226939
J. L. Tecpanecatl-Xihuitl, M. Bayoumi
This paper presents an efficient multistage decimation filter using a specific decomposition multistage and pipeline/interleaving technique to reduce the amount of multiplications. The multistage decimator filter is an important block on digital IF receivers for advanced dedicated mobile data technology called Mobitex and Ardis networks. The results are presented and compared with current results in the literature. The frequency response shows that the requirements are reached and the amount of multiplications is highly reduced. In each case, we get results with an improvement of 55% and 45% just in the multistage decimation filter. Additionally, using PI techniques we just need a single filter to process the components I, and Q in the IF digital receiver.
{"title":"Efficient multistage decimation filter using pipeline/interleaving architectures for digital IF receiver","authors":"J. L. Tecpanecatl-Xihuitl, M. Bayoumi","doi":"10.1109/SCS.2003.1226939","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226939","url":null,"abstract":"This paper presents an efficient multistage decimation filter using a specific decomposition multistage and pipeline/interleaving technique to reduce the amount of multiplications. The multistage decimator filter is an important block on digital IF receivers for advanced dedicated mobile data technology called Mobitex and Ardis networks. The results are presented and compared with current results in the literature. The frequency response shows that the requirements are reached and the amount of multiplications is highly reduced. In each case, we get results with an improvement of 55% and 45% just in the multistage decimation filter. Additionally, using PI techniques we just need a single filter to process the components I, and Q in the IF digital receiver.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128765794","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 : 2003-07-10DOI: 10.1109/SCS.2003.1227131
N. Alexandru, C. Chatellier
Using the approaches of Calderbank by N.D. Alexandru and G. Morgenstern (1998), Cariolaro by G.L. Cariolaro et al. (1983) and Bilardi by G. Bilardi et al. (1983), we devised a general formula to calculate the autocorrelation function for 1I-nO alphabetic line codes using either the kernel D·Tk and the output or codeword matrix A or the kernel Tk-1 and the entry and departure vectors e and d. We checked its validity for a particular block code named PPM. The results perfectly match those found in the literature. We generalized the approaches found in the literature and derived specific formulae to perform the calculations.
{"title":"Extending the calculation of correlation function for 1I-nO block coded signals","authors":"N. Alexandru, C. Chatellier","doi":"10.1109/SCS.2003.1227131","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227131","url":null,"abstract":"Using the approaches of Calderbank by N.D. Alexandru and G. Morgenstern (1998), Cariolaro by G.L. Cariolaro et al. (1983) and Bilardi by G. Bilardi et al. (1983), we devised a general formula to calculate the autocorrelation function for 1I-nO alphabetic line codes using either the kernel D·Tk and the output or codeword matrix A or the kernel Tk-1 and the entry and departure vectors e and d. We checked its validity for a particular block code named PPM. The results perfectly match those found in the literature. We generalized the approaches found in the literature and derived specific formulae to perform the calculations.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132268345","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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