Pub Date : 1995-09-05DOI: 10.1109/CCECE.1995.526421
A. Grzeszczak, M. Mandal, S. Panchanathan
This paper presents a VLSI implementation of discrete wavelet transform (DWT). The architecture is systolic in nature and performs both high-pass and low-pass coefficient calculations with only one set of multipliers. The architecture is simple, modular, and cascadable, and has been implemented in VLSI. Simulation results show that real-time coefficient calculation on a 512/spl times/612 pixels monochrome video input can be achieved.
{"title":"VLSI implementation of discrete wavelet transform","authors":"A. Grzeszczak, M. Mandal, S. Panchanathan","doi":"10.1109/CCECE.1995.526421","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526421","url":null,"abstract":"This paper presents a VLSI implementation of discrete wavelet transform (DWT). The architecture is systolic in nature and performs both high-pass and low-pass coefficient calculations with only one set of multipliers. The architecture is simple, modular, and cascadable, and has been implemented in VLSI. Simulation results show that real-time coefficient calculation on a 512/spl times/612 pixels monochrome video input can be achieved.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"530 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124249681","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528088
C.J.B. Fayomii, M. Sawan, S. Bennis
A new approach for implementing a parallel VLSI architecture of a simplified Kalman filter (information filter) with unknown noise statistics is described. At the system level, the proposed approach is applied to a semi-systolic VLSI array to accelerate the matrix operations required in each iteration. In order to maximize the parallelism, a new architecture called the tri-trapezoidal array for implementing the Schur complement algorithm is proposed. The computations steps are decomposed into 2(m+1) parts executable in parallel. This decomposition decreases the computation time by 55%. The overall architecture exhibits a high performance and can be used for real time applications.
{"title":"Parallel VLSI implementation of a new simplified architecture of Kalman filter","authors":"C.J.B. Fayomii, M. Sawan, S. Bennis","doi":"10.1109/CCECE.1995.528088","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528088","url":null,"abstract":"A new approach for implementing a parallel VLSI architecture of a simplified Kalman filter (information filter) with unknown noise statistics is described. At the system level, the proposed approach is applied to a semi-systolic VLSI array to accelerate the matrix operations required in each iteration. In order to maximize the parallelism, a new architecture called the tri-trapezoidal array for implementing the Schur complement algorithm is proposed. The computations steps are decomposed into 2(m+1) parts executable in parallel. This decomposition decreases the computation time by 55%. The overall architecture exhibits a high performance and can be used for real time applications.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126163388","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528077
P. Sicard, S.M. Javad Sadr
Passivity based control laws have interesting features, such as robustness of stability and natural extension to passive controller-observer design. We present reduced and full state passive control laws for a flexible joint robot. We show that even though reduced state feedback guarantees global asymptotic stability, the dynamic performance is poor since it is driven by the natural modes of the mechanical structure. However, full state feedback can be used to inject damping and accelerate the link state behavior. The robustness of the control law permits the use of an approximate feedforward signal to reduce the complexity of the control algorithm.
{"title":"Comparison of reduced state and full state passive control laws for flexible joint robots","authors":"P. Sicard, S.M. Javad Sadr","doi":"10.1109/CCECE.1995.528077","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528077","url":null,"abstract":"Passivity based control laws have interesting features, such as robustness of stability and natural extension to passive controller-observer design. We present reduced and full state passive control laws for a flexible joint robot. We show that even though reduced state feedback guarantees global asymptotic stability, the dynamic performance is poor since it is driven by the natural modes of the mechanical structure. However, full state feedback can be used to inject damping and accelerate the link state behavior. The robustness of the control law permits the use of an approximate feedforward signal to reduce the complexity of the control algorithm.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126303768","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 : 1995-09-05DOI: 10.1109/CCECE.1995.526579
T. Wong, C. Rosu, J. Houle
This paper presents an analysis of a heuristic mapping method used in the scheduling of parallel real-time tasks. Tasks arise when an electrical network, targeted for simulation, is broken down into real-time schedulable objects with resource requirements and timing constraints. Also, tasks are characterized by their worst-ease execution times and their hard deadlines. Results from computer simulations show the dynamic behavior of the mapping method.
{"title":"Analysis of a heuristic mapping method for parallel real-time simulation of electrical networks","authors":"T. Wong, C. Rosu, J. Houle","doi":"10.1109/CCECE.1995.526579","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526579","url":null,"abstract":"This paper presents an analysis of a heuristic mapping method used in the scheduling of parallel real-time tasks. Tasks arise when an electrical network, targeted for simulation, is broken down into real-time schedulable objects with resource requirements and timing constraints. Also, tasks are characterized by their worst-ease execution times and their hard deadlines. Results from computer simulations show the dynamic behavior of the mapping method.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130072785","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528166
J.H. Weigelt, M.H. Rahman
Investigates the feasibility of the addition of security services directly into the B-ISDN protocol stack. A complete design of a security system for B-ISDN based networks is proposed. This design is validated through simulation. Based upon the simulation results and the current standards, the addition of a security system within the B-ISDN protocol stack is demonstrated as a viable method of securing the ATM traffic.
{"title":"Securing asynchronous transfer mode based networks through the use of encryption","authors":"J.H. Weigelt, M.H. Rahman","doi":"10.1109/CCECE.1995.528166","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528166","url":null,"abstract":"Investigates the feasibility of the addition of security services directly into the B-ISDN protocol stack. A complete design of a security system for B-ISDN based networks is proposed. This design is validated through simulation. Based upon the simulation results and the current standards, the addition of a security system within the B-ISDN protocol stack is demonstrated as a viable method of securing the ATM traffic.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129511277","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528118
C. Nassar, M. Soleymani
We develop a general receiver for the detection of data in the presence of additive noise and other channel impairments. These impairments may be any channel effect which introduces unknown, possibly random parameters into the received signal. These include phase offset, frequency offset, complex channel gain, intersymbol interference, or any combination thereof. The proposed receiver uses a structure based on parallel processing; m demodulators are placed in parallel, followed by a decision unit which makes selections from the m demodulator outputs. We detail the components of this receiver for some important channels. Using an illustrative example, we demonstrate the ability of this receiver to achieve a performance closely matching optimal, while maintaining a low complexity.
{"title":"The general unknown parameter receiver","authors":"C. Nassar, M. Soleymani","doi":"10.1109/CCECE.1995.528118","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528118","url":null,"abstract":"We develop a general receiver for the detection of data in the presence of additive noise and other channel impairments. These impairments may be any channel effect which introduces unknown, possibly random parameters into the received signal. These include phase offset, frequency offset, complex channel gain, intersymbol interference, or any combination thereof. The proposed receiver uses a structure based on parallel processing; m demodulators are placed in parallel, followed by a decision unit which makes selections from the m demodulator outputs. We detail the components of this receiver for some important channels. Using an illustrative example, we demonstrate the ability of this receiver to achieve a performance closely matching optimal, while maintaining a low complexity.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130087011","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 : 1995-09-05DOI: 10.1109/CCECE.1995.526426
S.N. Subramanian, T. Le-Ngoc
Proposes a new model for characterizing the data traffic in a multi-media environment. The authors model the data traffic by a two-state doubly stochastic Poisson process, with sojourn times in each state having an independent and identical heavy tailed distribution, such as the Pareto distribution. The simulation results from the new data traffic model are presented. The new model is versatile in capturing the self-similar characteristics of traffic found in the traffic measurements. The authors also suggest that the other two types of multi-media traffic namely, voice and video may each be characterized by a 2-state doubly stochastic Poisson process with exponential sojourn times (i.e., a Markov modulated Poisson process or MMPP).
{"title":"Traffic modeling in a multi-media environment","authors":"S.N. Subramanian, T. Le-Ngoc","doi":"10.1109/CCECE.1995.526426","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526426","url":null,"abstract":"Proposes a new model for characterizing the data traffic in a multi-media environment. The authors model the data traffic by a two-state doubly stochastic Poisson process, with sojourn times in each state having an independent and identical heavy tailed distribution, such as the Pareto distribution. The simulation results from the new data traffic model are presented. The new model is versatile in capturing the self-similar characteristics of traffic found in the traffic measurements. The authors also suggest that the other two types of multi-media traffic namely, voice and video may each be characterized by a 2-state doubly stochastic Poisson process with exponential sojourn times (i.e., a Markov modulated Poisson process or MMPP).","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122527360","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528198
S. Huang
This paper discusses the importance of MPEG-2 video decoder compliance test and possible methods of implementing the test. According the features of MPEG-2 standard and its application requirements, three grades of compliance test configurations have been designed.
{"title":"MPEG-2 video decoder compliance test methodology","authors":"S. Huang","doi":"10.1109/CCECE.1995.528198","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528198","url":null,"abstract":"This paper discusses the importance of MPEG-2 video decoder compliance test and possible methods of implementing the test. According the features of MPEG-2 standard and its application requirements, three grades of compliance test configurations have been designed.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124389434","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 : 1995-09-05DOI: 10.1109/CCECE.1995.526591
M. C. Ghanem, S.E. Morry, K. Al-haddad, G. Roy
This article proposes a new topology and control strategy to optimise the power factor of a parallel resonance AC/DC convertor of high power while retaining high efficiency. The static and dynamic characteristics determined by the phase-plane method and the results obtained from simulation with Matlab software are detailed and analysed with an example of design of a convertor operating at 33 kHz and 2.5 kW. With adjustment of the commutator control signal a line current of sinusoidal form can be created in phase with the network voltage while maintaining soft switching. The amplitude and phase of the current can be adjusted separately.
{"title":"Study of a modified parallel resonance AC-DC convertor with unity power factor and high efficiency","authors":"M. C. Ghanem, S.E. Morry, K. Al-haddad, G. Roy","doi":"10.1109/CCECE.1995.526591","DOIUrl":"https://doi.org/10.1109/CCECE.1995.526591","url":null,"abstract":"This article proposes a new topology and control strategy to optimise the power factor of a parallel resonance AC/DC convertor of high power while retaining high efficiency. The static and dynamic characteristics determined by the phase-plane method and the results obtained from simulation with Matlab software are detailed and analysed with an example of design of a convertor operating at 33 kHz and 2.5 kW. With adjustment of the commutator control signal a line current of sinusoidal form can be created in phase with the network voltage while maintaining soft switching. The amplitude and phase of the current can be adjusted separately.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127810128","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 : 1995-09-05DOI: 10.1109/CCECE.1995.528127
K. Sedraoui, K. Al-haddad, A. Chandra, C. Millet
A strategy to eliminate the vibrations generated by the harmonics of armature reaction in the stator of hydrogenerators is described in this paper. It consists of the verification and optimization of the stator winding configuration, considering that the three phase currents in the windings are sinusoidal and balanced, and that the induction is proportional to the magnetomotive force. Calculation of the coefficients dependent on winding configuration leads to the formulation of the vibration causing forces. Furthermore, this approach permits the determination of the relative amplitude of the radial efforts caused by the armature reaction on the magnetic circuit. The standard solutions, such as chording, are insufficient to solve all the different problems. A new method based on the rearrangement of the conductors distribution to neutralize the harmonics that cause the deformation of the space wave is experimented upon.
{"title":"A strategy to reduce the vibrations generated by the harmonics of armature reaction in hydro generators","authors":"K. Sedraoui, K. Al-haddad, A. Chandra, C. Millet","doi":"10.1109/CCECE.1995.528127","DOIUrl":"https://doi.org/10.1109/CCECE.1995.528127","url":null,"abstract":"A strategy to eliminate the vibrations generated by the harmonics of armature reaction in the stator of hydrogenerators is described in this paper. It consists of the verification and optimization of the stator winding configuration, considering that the three phase currents in the windings are sinusoidal and balanced, and that the induction is proportional to the magnetomotive force. Calculation of the coefficients dependent on winding configuration leads to the formulation of the vibration causing forces. Furthermore, this approach permits the determination of the relative amplitude of the radial efforts caused by the armature reaction on the magnetic circuit. The standard solutions, such as chording, are insufficient to solve all the different problems. A new method based on the rearrangement of the conductors distribution to neutralize the harmonics that cause the deformation of the space wave is experimented upon.","PeriodicalId":158581,"journal":{"name":"Proceedings 1995 Canadian Conference on Electrical and Computer Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129127284","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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