Pub Date : 2009-11-01DOI: 10.1109/ICSCS.2009.5412251
S. Gaoua, S. Asadi, M. Yagoub
Widely used in RF/microwave systems, active devices like field effect transistors (FETs) need to be accurately modeled to achieve a reliable system design. In this paper, the authors proposed two techniques for efficient FET modeling. First, a fuzzy-neural frequency-domain approach was developed to allow selecting the most suitable electrical equivalent circuit model of a FET. Then, a time-domain approach was investigated to help developing enhanced distributed transistor models.
{"title":"Frequency- and time-domain modeling tools for efficient RF/microwave transistor characterization","authors":"S. Gaoua, S. Asadi, M. Yagoub","doi":"10.1109/ICSCS.2009.5412251","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412251","url":null,"abstract":"Widely used in RF/microwave systems, active devices like field effect transistors (FETs) need to be accurately modeled to achieve a reliable system design. In this paper, the authors proposed two techniques for efficient FET modeling. First, a fuzzy-neural frequency-domain approach was developed to allow selecting the most suitable electrical equivalent circuit model of a FET. Then, a time-domain approach was investigated to help developing enhanced distributed transistor models.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"2011 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134481716","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412610
M. Corinthios
A generalisation of the Dirac-delta function and its family of derivatives recently proposed as a means of introducing impulses on the complex plane in Laplace and z transform domains is shown to extend the applications of Bilateral Laplace and z transforms. Transforms of two-sided signals and sequences are made possible by a extending the domain of distributions to cover generalized functions of complex variables. The domains of Bilateral Laplace and z transforms are shown to extend to two-sided exponentials and fast-rising functions, which, without such generalized impulses have no transform. Applications include generalized forms of the sampling theorem, a new type of spatial convolution on the s and z planes and solutions of differential and difference equations with two-sided infinite duration forcing functions and sequences.
{"title":"Extended Bilateral transforms and their applications","authors":"M. Corinthios","doi":"10.1109/ICSCS.2009.5412610","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412610","url":null,"abstract":"A generalisation of the Dirac-delta function and its family of derivatives recently proposed as a means of introducing impulses on the complex plane in Laplace and z transform domains is shown to extend the applications of Bilateral Laplace and z transforms. Transforms of two-sided signals and sequences are made possible by a extending the domain of distributions to cover generalized functions of complex variables. The domains of Bilateral Laplace and z transforms are shown to extend to two-sided exponentials and fast-rising functions, which, without such generalized impulses have no transform. Applications include generalized forms of the sampling theorem, a new type of spatial convolution on the s and z planes and solutions of differential and difference equations with two-sided infinite duration forcing functions and sequences.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132954807","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412593
Heyfa Ammar, A. Benazza-Benyahia
In this paper, we are interested in detecting blotches in old movies using spatial and temporal information of the sequence. The contribution of our approach is three-fold. Firstly, unlike conventional methods, we proceed to the detection in the wavelet transform domain instead of the spatial domain. Secondly, the detection of the possible corrupted coefficients in each subband and at each resolution level involves a specific multiple outlier statistical test. Finally, a coarse-to-fine strategy is carried out to capture the interscale persistency of the coefficients in order to estimate the positions of the corrupted pixels in the full resolution image.
{"title":"A novel spatio-temporal method for blotch detection in the wavelet transform domain","authors":"Heyfa Ammar, A. Benazza-Benyahia","doi":"10.1109/ICSCS.2009.5412593","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412593","url":null,"abstract":"In this paper, we are interested in detecting blotches in old movies using spatial and temporal information of the sequence. The contribution of our approach is three-fold. Firstly, unlike conventional methods, we proceed to the detection in the wavelet transform domain instead of the spatial domain. Secondly, the detection of the possible corrupted coefficients in each subband and at each resolution level involves a specific multiple outlier statistical test. Finally, a coarse-to-fine strategy is carried out to capture the interscale persistency of the coefficients in order to estimate the positions of the corrupted pixels in the full resolution image.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132167125","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412330
J. Ferron, L. Anghel, R. Leveugle, A. Bocquillon, F. Miller, G. Mantelet
The interest for SRAM based FPGAs has increased in the last few years in embedded systems, due to cost and reconfigurability motivations. Such systems may operate in harsh environments with for example ionizing radiations, and the application may require a high level of dependability. When the FPGAs are not developed on radiation-hardened technologies, using them in critical applications requires evaluating the consequences of modifications in their configuration. This paper summarizes an approach to evaluate at design time the criticality of the various bits in the configuration file of such a FPGA. Results are given on an Atmel component and comparisons are made with experimental results based on laser fault injections and proton ground tests.
{"title":"A methodology and tool for predictive analysis of configuration bit criticality in SRAM-based FPGAS: Experimental results","authors":"J. Ferron, L. Anghel, R. Leveugle, A. Bocquillon, F. Miller, G. Mantelet","doi":"10.1109/ICSCS.2009.5412330","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412330","url":null,"abstract":"The interest for SRAM based FPGAs has increased in the last few years in embedded systems, due to cost and reconfigurability motivations. Such systems may operate in harsh environments with for example ionizing radiations, and the application may require a high level of dependability. When the FPGAs are not developed on radiation-hardened technologies, using them in critical applications requires evaluating the consequences of modifications in their configuration. This paper summarizes an approach to evaluate at design time the criticality of the various bits in the configuration file of such a FPGA. Results are given on an Atmel component and comparisons are made with experimental results based on laser fault injections and proton ground tests.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123035134","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412703
M. Baldi, F. Chiaraluce, Noureddine Boujnah, R. Garello
This paper investigates some theoretical issues related with the truncation of maximum length sequences. It is shown that truncation can have a significant impact on the autocorrelation properties, mining the applicability of these sequences in practical applications. First and second order statistics for the autocorrelation function are considered, and some new relations are presented that simplify computation. As an example of practical impairment, we focus on space communication links and we consider the changes that occur in the transmitted waveform power spectral density when truncated sequences are used for data randomization.
{"title":"Impact of truncation on the statistical properties of LFSR sequences","authors":"M. Baldi, F. Chiaraluce, Noureddine Boujnah, R. Garello","doi":"10.1109/ICSCS.2009.5412703","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412703","url":null,"abstract":"This paper investigates some theoretical issues related with the truncation of maximum length sequences. It is shown that truncation can have a significant impact on the autocorrelation properties, mining the applicability of these sequences in practical applications. First and second order statistics for the autocorrelation function are considered, and some new relations are presented that simplify computation. As an example of practical impairment, we focus on space communication links and we consider the changes that occur in the transmitted waveform power spectral density when truncated sequences are used for data randomization.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123875574","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412478
A. Rae, A. Khamis, O. Basir, M. Kamel
We present a method for audio-visual speaker detection and tracking in a smart meeting room environment based on bearing measurements and particle filtering. Bearing measurements are determined using the Time Difference of Arrival (TDOA) of the acoustic signal reaching a pair of microphones, and by tracking facial regions in images from monocular cameras. A particle filter is used to sample the space of possible speaker locations within the meeting room, and to fuse the bearing measurements from auditory and visual sources. The proposed system was tested in a video messaging scenario, using a single participant seated in front of a screen to which a camera and microphone pair are attached. The experimental results show that the accuracy of speaker tracking using bearing measurements is related to the location of the speaker relative to the locations of the camera and microphones, which can be quantified using a parameter known as Dilution of Precision.
{"title":"Particle filtering for bearing-only audio-visual speaker detection and tracking","authors":"A. Rae, A. Khamis, O. Basir, M. Kamel","doi":"10.1109/ICSCS.2009.5412478","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412478","url":null,"abstract":"We present a method for audio-visual speaker detection and tracking in a smart meeting room environment based on bearing measurements and particle filtering. Bearing measurements are determined using the Time Difference of Arrival (TDOA) of the acoustic signal reaching a pair of microphones, and by tracking facial regions in images from monocular cameras. A particle filter is used to sample the space of possible speaker locations within the meeting room, and to fuse the bearing measurements from auditory and visual sources. The proposed system was tested in a video messaging scenario, using a single participant seated in front of a screen to which a camera and microphone pair are attached. The experimental results show that the accuracy of speaker tracking using bearing measurements is related to the location of the speaker relative to the locations of the camera and microphones, which can be quantified using a parameter known as Dilution of Precision.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121251503","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412534
A. A. Baker, Boris Milanovic, Qi Wang
Parallel and distributed algorithms constitute an advanced topic in theoretical and practical computer science that has gained much interest recently. It is generally known that studying and teaching the fundamentals of parallel algorithm's concepts present a constant challenge to both learners and educators. Due to the additional abstract concepts applied in the implementation of parallel algorithms, designing visualisations of parallel algorithms is far more arduous than visualising sequential algorithms (single process). At the same time, the pedagogical gain of parallel algorithm visualisations is much higher than that of sequential ones. In this paper we introduce a new approach to minimising the effort needed to create effective visual simulations of parallel and distributed algorithms.
{"title":"An approach for facilitating the development of visual simulations of parallel and distributed algorithms","authors":"A. A. Baker, Boris Milanovic, Qi Wang","doi":"10.1109/ICSCS.2009.5412534","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412534","url":null,"abstract":"Parallel and distributed algorithms constitute an advanced topic in theoretical and practical computer science that has gained much interest recently. It is generally known that studying and teaching the fundamentals of parallel algorithm's concepts present a constant challenge to both learners and educators. Due to the additional abstract concepts applied in the implementation of parallel algorithms, designing visualisations of parallel algorithms is far more arduous than visualising sequential algorithms (single process). At the same time, the pedagogical gain of parallel algorithm visualisations is much higher than that of sequential ones. In this paper we introduce a new approach to minimising the effort needed to create effective visual simulations of parallel and distributed algorithms.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"28 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121015440","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412216
Yun-Qian Miao, A. Khamis, M. Kamel
This paper reviews coordinated motion control strategies of mobile sensors in mobile surveillance systems. Mobile surveillance systems include a vast array of mobile sensing nodes with varying sensing modalities that can sense continuously the volume of interest. These distributed nodes are capable of sensing, processing, mobilization and communication with other nodes. One of the fundamental problems of mobile surveillance systems is how to coordinate these distributed nodes in such a way that they can move together in concert. Based on the nature of the surveillance task, three coordinated motion control strategies are described. These strategies are direct control, intentional control and emergent control.
{"title":"Coordinated motion control of mobile sensors in surveillance systems","authors":"Yun-Qian Miao, A. Khamis, M. Kamel","doi":"10.1109/ICSCS.2009.5412216","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412216","url":null,"abstract":"This paper reviews coordinated motion control strategies of mobile sensors in mobile surveillance systems. Mobile surveillance systems include a vast array of mobile sensing nodes with varying sensing modalities that can sense continuously the volume of interest. These distributed nodes are capable of sensing, processing, mobilization and communication with other nodes. One of the fundamental problems of mobile surveillance systems is how to coordinate these distributed nodes in such a way that they can move together in concert. Based on the nature of the surveillance task, three coordinated motion control strategies are described. These strategies are direct control, intentional control and emergent control.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125713717","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412351
N. B. Ameur, Maher Soyah, N. Masmoudi, M. Loulou
This paper describes a synthesis design from the MATLAB model into VHDL of a digital interpolation filter algorithm, used in a Δ-Σ Digital-to-Analog converter (DAC), intended for Professional digital audio system. The whole filter system simulation, VHDL implementation and Field Programmable Gate Array (FPGA) verification are processing. The Register Transfer Level (RTL) simulation result show an achieving a high resolution of a 22.5-bit at a switching rate of 8.192 MHz and a small area less than 50% of the total chip. Timing analysis indicates any violation of temporal constraints and the worst-case maximum clock speed of the design can attain a 500 MHz.
{"title":"FPGA implementation of polyphase decomposed FIR filters for interpolation used in Δ-Σ audio DAC","authors":"N. B. Ameur, Maher Soyah, N. Masmoudi, M. Loulou","doi":"10.1109/ICSCS.2009.5412351","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412351","url":null,"abstract":"This paper describes a synthesis design from the MATLAB model into VHDL of a digital interpolation filter algorithm, used in a Δ-Σ Digital-to-Analog converter (DAC), intended for Professional digital audio system. The whole filter system simulation, VHDL implementation and Field Programmable Gate Array (FPGA) verification are processing. The Register Transfer Level (RTL) simulation result show an achieving a high resolution of a 22.5-bit at a switching rate of 8.192 MHz and a small area less than 50% of the total chip. Timing analysis indicates any violation of temporal constraints and the worst-case maximum clock speed of the design can attain a 500 MHz.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123703608","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 : 2009-11-01DOI: 10.1109/ICSCS.2009.5412340
L. Meddeber, N. Berrached
We present in this article two complete procedures to solve some problems of the road networks. First, we must start with a process of road networks extraction based on the fuzzy clustering unsupervised approaches, and then we apply another approach for the local registration and deformation of a cartographic and a satellite road networks. For this aim, the idea is to segment first the sensed data and to recognize the basic urban classes (vegetation, roads, and other sectors). Then, starting from these classes, we extract the structures and the infrastructures interest by applying two algorithms of road network extraction (The Connectivity Weighted Hough Transform (CWHT), and the Regularised Shortest-Path Extraction (RSPE)), their different capabilities are applied for the characterization of streets with different width and shape. Finally, the proposed local registration method consists in translating the cartographic data into a graph model, and then defining Markov random fields (MRF) to fit the graph and the satellite image.
{"title":"Development of a fuzzy inference and Markovian system for the local registration of satellite and cartographic images","authors":"L. Meddeber, N. Berrached","doi":"10.1109/ICSCS.2009.5412340","DOIUrl":"https://doi.org/10.1109/ICSCS.2009.5412340","url":null,"abstract":"We present in this article two complete procedures to solve some problems of the road networks. First, we must start with a process of road networks extraction based on the fuzzy clustering unsupervised approaches, and then we apply another approach for the local registration and deformation of a cartographic and a satellite road networks. For this aim, the idea is to segment first the sensed data and to recognize the basic urban classes (vegetation, roads, and other sectors). Then, starting from these classes, we extract the structures and the infrastructures interest by applying two algorithms of road network extraction (The Connectivity Weighted Hough Transform (CWHT), and the Regularised Shortest-Path Extraction (RSPE)), their different capabilities are applied for the characterization of streets with different width and shape. Finally, the proposed local registration method consists in translating the cartographic data into a graph model, and then defining Markov random fields (MRF) to fit the graph and the satellite image.","PeriodicalId":126072,"journal":{"name":"2009 3rd International Conference on Signals, Circuits and Systems (SCS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121726980","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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