Pub Date : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296290
V. Pirajnanchai, S. Luangphakorn, J. Nakasuwan, K. Janchitrapongvej
It has been known that a given single or more op-amps RC sinusoidal oscillator has four distinctly different, equivalent, and stable forms. [R. Senani, Sept. 1987] [N. Boutin, Dec. 1984]. This paper's different structure have been proposed to overcome the frequency limitations associated with uniformly distributed RC line (UR Cs) network and single pole amplifier based adjustable frequency sinusoidal oscillator. The simulation and experimental results are in reasonably good agreement with the theories and have very low harmonic distortion. This circuit can be suitable for LSI process fabrication.
已知给定的单个或多个运放RC正弦振荡器具有四种明显不同的等效和稳定形式。(R。[j]。Boutin, december 1984]。本文提出了一种不同的结构，以克服均匀分布RC线(UR c)网络和基于可调频率正弦振荡器的单极放大器的频率限制。仿真和实验结果与理论吻合较好，谐波失真很小。该电路可适用于大规模集成电路工艺制造。
{"title":"Novel technique using single pole amplifier in sinewave oscillator","authors":"V. Pirajnanchai, S. Luangphakorn, J. Nakasuwan, K. Janchitrapongvej","doi":"10.1109/ISCCSP.2004.1296290","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296290","url":null,"abstract":"It has been known that a given single or more op-amps RC sinusoidal oscillator has four distinctly different, equivalent, and stable forms. [R. Senani, Sept. 1987] [N. Boutin, Dec. 1984]. This paper's different structure have been proposed to overcome the frequency limitations associated with uniformly distributed RC line (UR Cs) network and single pole amplifier based adjustable frequency sinusoidal oscillator. The simulation and experimental results are in reasonably good agreement with the theories and have very low harmonic distortion. This circuit can be suitable for LSI process fabrication.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133553844","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296498
O. Benrhouma, A. Bouallègue, S. Houcke
Recently the space-time codes were introduced. They allow significant profits of performances (J. Foschini et al., March 1996) (V. Tarokh et al., 1998,1999). They consist in using several transmitting antennas and sending the signal on sensor network. The transmitted information is then coded differently on each of the sending antennas. Thus, relevant codes could be highlighted for Rayleigh channels. When the channel is very dispersive, it is impossible to use space-time codes developed within the framework of numerical communications on Rayleigh channel. In this paper, we propose a new method (without training sequence) allowing to take part of emission diversity in the numerical communication context on multipath channels. A communication system having 2 emitting antennas and P received antennas over a frequency selective channel is implemented. Each antenna send the same information but coded differently. The problem is then identified as a sensor blind separation problem : it consists in emitting the transmitted symbols sent by the first antenna and those sent by the second antenna.
最近介绍了空时码。他们允许演出获得可观的利润(J. Foschini et al.， 1996年3月)(V. Tarokh et al.， 1998,1999)。它们包括使用多个发射天线在传感器网络上发送信号。然后在每个发送天线上对传输的信息进行不同的编码。因此，对于瑞利信道，可以突出显示相关代码。当信道色散非常大时，在瑞利信道上使用数字通信框架内开发的空时码是不可能的。在本文中，我们提出了一种新的方法(不需要训练序列)，允许在多径信道上的数字通信环境中吸收部分发射分集。本发明实现一种在频率选择信道上具有2个发射天线和P个接收天线的通信系统。每个天线发送相同的信息，但编码不同。然后将该问题确定为传感器盲分离问题:它包括发射由第一天线发送的发射符号和由第二天线发送的发射符号。
{"title":"A new method of source separation problems: turbo deflation","authors":"O. Benrhouma, A. Bouallègue, S. Houcke","doi":"10.1109/ISCCSP.2004.1296498","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296498","url":null,"abstract":"Recently the space-time codes were introduced. They allow significant profits of performances (J. Foschini et al., March 1996) (V. Tarokh et al., 1998,1999). They consist in using several transmitting antennas and sending the signal on sensor network. The transmitted information is then coded differently on each of the sending antennas. Thus, relevant codes could be highlighted for Rayleigh channels. When the channel is very dispersive, it is impossible to use space-time codes developed within the framework of numerical communications on Rayleigh channel. In this paper, we propose a new method (without training sequence) allowing to take part of emission diversity in the numerical communication context on multipath channels. A communication system having 2 emitting antennas and P received antennas over a frequency selective channel is implemented. Each antenna send the same information but coded differently. The problem is then identified as a sensor blind separation problem : it consists in emitting the transmitted symbols sent by the first antenna and those sent by the second antenna.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132746100","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296269
A. Elloumi, Z. Lachiri, N. Ellouze
This paper proposes a new fetal electrocardiogram (FECG) extraction method using two pass pitch synchronous wavelet transform (PSWT). This representation is based on a modelling concept which is able to capture period to period fluctuations of the signal by means of basis elements that are comb-like in the frequency domain. The essence of the two pass approach involves first estimating the maternal ECG from a corrupted abdominal cutaneaous recording using a pitch synchronous decomposition. Based on this estimation, a second iteration is performed in order to recover the desired fetal ECG components. The performance of the proposed technique is evaluated on a variety of ECG signals. Experimental results show the accuracy of the proposed technique especially in low fetal ECG power circumstance.
{"title":"Pitch synchronous wavelet based fetal ECG extraction","authors":"A. Elloumi, Z. Lachiri, N. Ellouze","doi":"10.1109/ISCCSP.2004.1296269","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296269","url":null,"abstract":"This paper proposes a new fetal electrocardiogram (FECG) extraction method using two pass pitch synchronous wavelet transform (PSWT). This representation is based on a modelling concept which is able to capture period to period fluctuations of the signal by means of basis elements that are comb-like in the frequency domain. The essence of the two pass approach involves first estimating the maternal ECG from a corrupted abdominal cutaneaous recording using a pitch synchronous decomposition. Based on this estimation, a second iteration is performed in order to recover the desired fetal ECG components. The performance of the proposed technique is evaluated on a variety of ECG signals. Experimental results show the accuracy of the proposed technique especially in low fetal ECG power circumstance.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133891787","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296328
N. Benouzza, A. Benyettou, A. Bendiabdellah
This paper deals with the application of Park's and advanced Park's vectors approach for the detection of rotor cage faults in operating three phase induction motors. Both simulation and laboratory tests results demonstrate how the present of rotor cage faults can be effectively detected by these approaches.
{"title":"An advanced Park's vectors approach for rotor cage diagnosis","authors":"N. Benouzza, A. Benyettou, A. Bendiabdellah","doi":"10.1109/ISCCSP.2004.1296328","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296328","url":null,"abstract":"This paper deals with the application of Park's and advanced Park's vectors approach for the detection of rotor cage faults in operating three phase induction motors. Both simulation and laboratory tests results demonstrate how the present of rotor cage faults can be effectively detected by these approaches.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"406 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122924856","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296218
J. Roychowdhury
During the design of electronic circuits and systems, particularly those for RF communications, the need to abstract a subsystem from a greater level of detail to one at a lower level of detail arises frequently. One important application is to generate simple, yet accurate, system-level macromodels that capture circuit-level non-idealities such as distortion. In recent years, computational ("algorithmic") techniques have been developed that are capable of automating this abstraction process for broad classes of differential-equation-based systems (including non-linear ones). In this paper, we review the main ideas and techniques behind such algorithmic macromodelling methods.
{"title":"Algorithmic methods for bottom-up generation of system-level RF macromodels","authors":"J. Roychowdhury","doi":"10.1109/ISCCSP.2004.1296218","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296218","url":null,"abstract":"During the design of electronic circuits and systems, particularly those for RF communications, the need to abstract a subsystem from a greater level of detail to one at a lower level of detail arises frequently. One important application is to generate simple, yet accurate, system-level macromodels that capture circuit-level non-idealities such as distortion. In recent years, computational (\"algorithmic\") techniques have been developed that are capable of automating this abstraction process for broad classes of differential-equation-based systems (including non-linear ones). In this paper, we review the main ideas and techniques behind such algorithmic macromodelling methods.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122974774","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296227
M. Trimeche, F. Chebil
With the emergence of wide bandwidth wireless networks, mobile Internet is set to provide a significant channel of multimedia content distribution. In the absence of proper digital rights management (DRM) systems, there is a real risk for content owners and producers to lose important revenues due to their intellectual property rights. To avoid market fragmentation and ensure interoperability, the Open Mobile Alliance (OMA) has set to define open DRM specification in their standardization process. In this paper, we review the specified methods of DRM within OMA. We present a scheme that utilizes watermarking as complementary solution for DRM on mobile devices, and we discuss how it could enhance the security of copyrighted media distribution. We focus the attention on the application of DRM methods for visual content in mobile devices.
{"title":"Digital rights management for visual content in mobile applications","authors":"M. Trimeche, F. Chebil","doi":"10.1109/ISCCSP.2004.1296227","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296227","url":null,"abstract":"With the emergence of wide bandwidth wireless networks, mobile Internet is set to provide a significant channel of multimedia content distribution. In the absence of proper digital rights management (DRM) systems, there is a real risk for content owners and producers to lose important revenues due to their intellectual property rights. To avoid market fragmentation and ensure interoperability, the Open Mobile Alliance (OMA) has set to define open DRM specification in their standardization process. In this paper, we review the specified methods of DRM within OMA. We present a scheme that utilizes watermarking as complementary solution for DRM on mobile devices, and we discuss how it could enhance the security of copyrighted media distribution. We focus the attention on the application of DRM methods for visual content in mobile devices.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124538720","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296261
Yuan Zhao, A. Tewfik
The paper provides a technique that can successfully recover data when collision occurs in pseudocellular wireless local area networks (WLANs). Pseudocellular WLANs use beamforming at the access point (AP). Mobile users send multiple data packets at the same time using different signature waveforms as in CDMA cellular network. Each user randomly chooses a signature waveform during the contention frame. If the same signature waveforms is selected by more than one user, a collision occurs. The proposed successive multiuser detection scheme with orthogonal ID sequence design enables the system to recover the data from collision. This helps to prevent mobile users from starting back-off timing due to failure in contention for the channel. Hence the total delay is lowered and the capacity of the system improves by a large amount under heavy traffic.
{"title":"Collision resolution in pseudocellular WLANs with beamforming","authors":"Yuan Zhao, A. Tewfik","doi":"10.1109/ISCCSP.2004.1296261","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296261","url":null,"abstract":"The paper provides a technique that can successfully recover data when collision occurs in pseudocellular wireless local area networks (WLANs). Pseudocellular WLANs use beamforming at the access point (AP). Mobile users send multiple data packets at the same time using different signature waveforms as in CDMA cellular network. Each user randomly chooses a signature waveform during the contention frame. If the same signature waveforms is selected by more than one user, a collision occurs. The proposed successive multiuser detection scheme with orthogonal ID sequence design enables the system to recover the data from collision. This helps to prevent mobile users from starting back-off timing due to failure in contention for the channel. Hence the total delay is lowered and the capacity of the system improves by a large amount under heavy traffic.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115141521","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296230
T. D’orazio, C. Guaragnella
An automatic iterative unsupervised data analysis tool is presented as a modification of well known Isodata algorithm. The main feature is its complete blindness and repeatability of the obtained results. It automatically selects a suitable number of features able to describe the whole data set requiring only one input parameter. As an application, color vector quantization has been addressed, both on real and on synthetic data sets, showing good performances.
{"title":"IDA - iterative data analysis applied to color vector quantization","authors":"T. D’orazio, C. Guaragnella","doi":"10.1109/ISCCSP.2004.1296230","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296230","url":null,"abstract":"An automatic iterative unsupervised data analysis tool is presented as a modification of well known Isodata algorithm. The main feature is its complete blindness and repeatability of the obtained results. It automatically selects a suitable number of features able to describe the whole data set requiring only one input parameter. As an application, color vector quantization has been addressed, both on real and on synthetic data sets, showing good performances.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128128707","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296273
S. Smaoui, H. Ghariani, A. Hamida, C. Mhiri, I. Feki
In this article, we propose to study and to conceive a programmable signal generator allowing inhibition of certain types of pain. This system would be provided with an electrode which could be applied in the periphery level of the patient's spinal cord in order to excite the nervous zone responsible for pain transmission. The conceived system would be commanded with variable voltages and piloted by a dedicated microcontroller. This would allow us to have different possibilities in conceiving various shapes of stimulating waves. The purpose is to offer flexibility during clinical adjustments especially when programming the various parameters of electrical stimuli. A PC connection was also provided in order to visualize and to adjust stimulating wave parameters. Our system could be then considered as an original one since it is enhanced by flexibility and maneuverability during clinical trials.
{"title":"Transcutaneous electrical nerve stimulation for pain relief","authors":"S. Smaoui, H. Ghariani, A. Hamida, C. Mhiri, I. Feki","doi":"10.1109/ISCCSP.2004.1296273","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296273","url":null,"abstract":"In this article, we propose to study and to conceive a programmable signal generator allowing inhibition of certain types of pain. This system would be provided with an electrode which could be applied in the periphery level of the patient's spinal cord in order to excite the nervous zone responsible for pain transmission. The conceived system would be commanded with variable voltages and piloted by a dedicated microcontroller. This would allow us to have different possibilities in conceiving various shapes of stimulating waves. The purpose is to offer flexibility during clinical adjustments especially when programming the various parameters of electrical stimuli. A PC connection was also provided in order to visualize and to adjust stimulating wave parameters. Our system could be then considered as an original one since it is enhanced by flexibility and maneuverability during clinical trials.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125827426","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 : 2004-09-27DOI: 10.1109/ISCCSP.2004.1296312
Y. Yu, Guohui Zhao, K. Teo, Y. Lim
Narrow band lowpass or highpass digital finite impulse response filters can be synthesized by using extrapolated impulse response techniques to achieve reduced complexity. However, the non-linear optimization problem of the extrapolated impulse response filters was simplified to a linear programming problem in previous literature leading to suboptimum. In this paper, a semi-infinite programming is proposed to jointly optimize the filter coefficients and the extrapolated scaling factors. A realization structure making use of the coefficient symmetry is also presented. An example taken from literature is included illustrating that the number of multipliers for the resulting filter is less than 65 percent of existing results.
{"title":"Optimization of extrapolated impulse response filters using semi-infinite programming","authors":"Y. Yu, Guohui Zhao, K. Teo, Y. Lim","doi":"10.1109/ISCCSP.2004.1296312","DOIUrl":"https://doi.org/10.1109/ISCCSP.2004.1296312","url":null,"abstract":"Narrow band lowpass or highpass digital finite impulse response filters can be synthesized by using extrapolated impulse response techniques to achieve reduced complexity. However, the non-linear optimization problem of the extrapolated impulse response filters was simplified to a linear programming problem in previous literature leading to suboptimum. In this paper, a semi-infinite programming is proposed to jointly optimize the filter coefficients and the extrapolated scaling factors. A realization structure making use of the coefficient symmetry is also presented. An example taken from literature is included illustrating that the number of multipliers for the resulting filter is less than 65 percent of existing results.","PeriodicalId":146713,"journal":{"name":"First International Symposium on Control, Communications and Signal Processing, 2004.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126558278","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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