Pub Date : 2003-07-10DOI: 10.1109/SCS.2003.1227060
G. Nenov
A method for determination of or network transfer function first-order sensitivity is described. It uses a modified Coates signal-flow graph representation of the passive part of the investigated network having in mind the influence of the ator-norator pairs of the network on the corresponding nodal equations. Then the first-order sensitivity of an arbitrary transfer function can be expressed by using some partial signal-flow graph transfer function. This approach avoids the canceling of each others terms in the transfer functions and simplifies the sensitivity expressions. An example illustrated the proposed method.
{"title":"Determination of first-order or network transfer function sensitivity by using Coates signal-flow graphs","authors":"G. Nenov","doi":"10.1109/SCS.2003.1227060","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227060","url":null,"abstract":"A method for determination of or network transfer function first-order sensitivity is described. It uses a modified Coates signal-flow graph representation of the passive part of the investigated network having in mind the influence of the ator-norator pairs of the network on the corresponding nodal equations. Then the first-order sensitivity of an arbitrary transfer function can be expressed by using some partial signal-flow graph transfer function. This approach avoids the canceling of each others terms in the transfer functions and simplifies the sensitivity expressions. An example illustrated the proposed method.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"10 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":"127785154","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.2003.1227129
M. Sadasivam, J. Wagholikar, Sangjin Hong Sangjin Hong
This paper presents low-complexity lookup based architecture for noise generation of different distribution. The noise generator is very efficient for VLSI implementation. It generates random addresses of the noise samples stored in ROM using LFSR. In this paper, we compare the complexity and performance of the proposed noise generator with those of the generators that are explained in the literatures. This noise generator is suitable for integration with complex filtering applications such as in particle filters.
{"title":"A look-up based low-complexity parallel noise generator for particle filter processing","authors":"M. Sadasivam, J. Wagholikar, Sangjin Hong Sangjin Hong","doi":"10.1109/SCS.2003.1227129","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227129","url":null,"abstract":"This paper presents low-complexity lookup based architecture for noise generation of different distribution. The noise generator is very efficient for VLSI implementation. It generates random addresses of the noise samples stored in ROM using LFSR. In this paper, we compare the complexity and performance of the proposed noise generator with those of the generators that are explained in the literatures. This noise generator is suitable for integration with complex filtering applications such as in particle filters.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"7 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":"124937807","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.2003.1227127
L. Fanucci, R. Grasso
In this paper, we present the successful application of prime factor algorithm FFT (Fast Fourier Transform) and pruning techniques to achieve low complexity UTRA-TDD joint detection. This approach has been applied to the Minimum Mean Square Error-Block Linear Equalizer (MMSE-BLE) receiver after proper reformulation in the frequency domain. A complexity reduction of 50% with respect to previous solutions has been demonstrated without any performance loss.
{"title":"Low complexity joint detection for UTRA-TDD receivers","authors":"L. Fanucci, R. Grasso","doi":"10.1109/SCS.2003.1227127","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227127","url":null,"abstract":"In this paper, we present the successful application of prime factor algorithm FFT (Fast Fourier Transform) and pruning techniques to achieve low complexity UTRA-TDD joint detection. This approach has been applied to the Minimum Mean Square Error-Block Linear Equalizer (MMSE-BLE) receiver after proper reformulation in the frequency domain. A complexity reduction of 50% with respect to previous solutions has been demonstrated without any performance loss.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"129 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":"123447684","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.2003.1227062
M. Iordache, L. Dumitriu, L. Mandache
The paper presents a new version of the modified nodal method for dynamic analysis of the linear and/or nonlinear large-scale analog circuits. The method is based on the semistate equations for circuit description. In essence the semistate encompasses those variables which are most convenient for a first description of a circuit, using KCL, KVL, and the constitutive equations of the circuit elements. In the paper, it is also presented a very simple method for the symbolic generation of the transfer function matrix. The algorithm to formulate and to solve the dynamic modified-nodal equations was implemented in a computer program, which constitutes a useful tool for symbolic analysis of a very large class of analog circuits.
{"title":"Efficient symbolic analysis method for large-scale analog circuits","authors":"M. Iordache, L. Dumitriu, L. Mandache","doi":"10.1109/SCS.2003.1227062","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227062","url":null,"abstract":"The paper presents a new version of the modified nodal method for dynamic analysis of the linear and/or nonlinear large-scale analog circuits. The method is based on the semistate equations for circuit description. In essence the semistate encompasses those variables which are most convenient for a first description of a circuit, using KCL, KVL, and the constitutive equations of the circuit elements. In the paper, it is also presented a very simple method for the symbolic generation of the transfer function matrix. The algorithm to formulate and to solve the dynamic modified-nodal equations was implemented in a computer program, which constitutes a useful tool for symbolic analysis of a very large class of analog circuits.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"324 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":"123451621","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.2003.1226933
Y. Andreyev, E. Efremova
The problem of separation of an observed sum of chaotic signals into the individual components is considered in the presence of noise. A noise threshold is found above which high-quality separation is impossible. This effect is shown to be associated with the information content of chaotic signals and a theoretical estimate is given for the threshold. A method for signal separation is proposed, which uses iteration of the chaotic sources equations in reverse time.
{"title":"Separation of wideband chaotic signals","authors":"Y. Andreyev, E. Efremova","doi":"10.1109/SCS.2003.1226933","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226933","url":null,"abstract":"The problem of separation of an observed sum of chaotic signals into the individual components is considered in the presence of noise. A noise threshold is found above which high-quality separation is impossible. This effect is shown to be associated with the information content of chaotic signals and a theoretical estimate is given for the threshold. A method for signal separation is proposed, which uses iteration of the chaotic sources equations in reverse time.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"62 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":"131422897","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.2003.1226945
B. Reljin, I. Reljin, G. Jovanović
Climate data fields are characterized by a large amount of information (having, usually, many non-dominant patterns), multivariability, and non-linear nature. Several statistical and signal processing methods are applied in analyzing such of data - some of them are used here in analyzing of climate in the region of Serbia and Montenegro. The teleconnection with the two major generators of the global climate variability: the ENSO (El Nino Southern Oscillation) and the NAO (North Atlantic Oscillation) is approved.
{"title":"Signal processing methods in analyzing of spatial-temporal climate data","authors":"B. Reljin, I. Reljin, G. Jovanović","doi":"10.1109/SCS.2003.1226945","DOIUrl":"https://doi.org/10.1109/SCS.2003.1226945","url":null,"abstract":"Climate data fields are characterized by a large amount of information (having, usually, many non-dominant patterns), multivariability, and non-linear nature. Several statistical and signal processing methods are applied in analyzing such of data - some of them are used here in analyzing of climate in the region of Serbia and Montenegro. The teleconnection with the two major generators of the global climate variability: the ENSO (El Nino Southern Oscillation) and the NAO (North Atlantic Oscillation) is approved.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"49 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":"125448863","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.2003.1227099
C. Gordan, R. Reiz
In this paper is presented an original method used to estimate the signature of an AM-FM signal, which in this case represents the variation law of the signal's instantaneous frequency. The analysis was developed for linear AM-FM signals covered by a zero mean Gaussian noise.
{"title":"Ridges extraction method for the linear AM-FM modulated signals covered by a zero-mean Gaussian noise","authors":"C. Gordan, R. Reiz","doi":"10.1109/SCS.2003.1227099","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227099","url":null,"abstract":"In this paper is presented an original method used to estimate the signature of an AM-FM signal, which in this case represents the variation law of the signal's instantaneous frequency. The analysis was developed for linear AM-FM signals covered by a zero mean Gaussian noise.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"23 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":"122271712","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.2003.1227125
M. Mathew, Yoonhark Oh Yoonhark Oh, Jaeyoung Lee Jaeyoung Lee, Changhoon Yim Changhoon Yim, Kilsu Eo Kilsu Eo
Standardization of audio watermarking systems by SDMI has been a major step towards digital distribution of music. In this paper, we discuss the implementation of Verance-4C (SDMI Phase-I) audio watermarking scheme on ARM940T processor. It uses several multiply intensive signal processing algorithms such as IIR filtering and autocorrelation. Since multiplications take many cycles in ARM processor, it is challenging to optimize the extractor with minimal number of multiplications. Also, data loading, storing and cache miss issues are important since the target system doesn't use internal memory. We also discuss a "Minimum Load and Store using Parallel Computation" (MLS-PC) algorithm for reducing data load and store operations while implementing a signal processing algorithm. The optimized watermark detector can extract audio watermarks from 192kHz, 24 bit audio at 50 MIPS.
{"title":"Implementation of a real-time audio watermark extractor on ARM940T","authors":"M. Mathew, Yoonhark Oh Yoonhark Oh, Jaeyoung Lee Jaeyoung Lee, Changhoon Yim Changhoon Yim, Kilsu Eo Kilsu Eo","doi":"10.1109/SCS.2003.1227125","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227125","url":null,"abstract":"Standardization of audio watermarking systems by SDMI has been a major step towards digital distribution of music. In this paper, we discuss the implementation of Verance-4C (SDMI Phase-I) audio watermarking scheme on ARM940T processor. It uses several multiply intensive signal processing algorithms such as IIR filtering and autocorrelation. Since multiplications take many cycles in ARM processor, it is challenging to optimize the extractor with minimal number of multiplications. Also, data loading, storing and cache miss issues are important since the target system doesn't use internal memory. We also discuss a \"Minimum Load and Store using Parallel Computation\" (MLS-PC) algorithm for reducing data load and store operations while implementing a signal processing algorithm. The optimized watermark detector can extract audio watermarks from 192kHz, 24 bit audio at 50 MIPS.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"21 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":"129561953","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.2003.1227132
D. Abbasi-Moghadam, K. Keyghobad, M. Soleimani
Turbo codes have a performance that approaches the Shannon limit on the capacity of a band limited communication channel. The transmission performance of nongeo services is mainly impaired by rapid amplitude and phase fluctuations of the received signal (fading). In this paper, the performance of turbo codes with different code parameters in slow and fast fading is presented for this channel. Because of the interleavers these codes offer some immunity to the correlated signal disruptions effects. So, as will be shown the effect of code length increment is greater than other parameters.
{"title":"Turbo codes for nongeo satellite communications","authors":"D. Abbasi-Moghadam, K. Keyghobad, M. Soleimani","doi":"10.1109/SCS.2003.1227132","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227132","url":null,"abstract":"Turbo codes have a performance that approaches the Shannon limit on the capacity of a band limited communication channel. The transmission performance of nongeo services is mainly impaired by rapid amplitude and phase fluctuations of the received signal (fading). In this paper, the performance of turbo codes with different code parameters in slow and fast fading is presented for this channel. Because of the interleavers these codes offer some immunity to the correlated signal disruptions effects. So, as will be shown the effect of code length increment is greater than other parameters.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"21 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":"130975159","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.2003.1227087
R. Ubar
A uniform fault model for representing physical defects in components of digital circuits is introduced. Physical defects are modeled as parameters in generic Boolean differential equations. Solutions of the equations give the conditions at which defects are locally activated. The defect activation conditions are used as functional fault models on the logic level for fault simulation purposes. The functional fault model can be regarded also as an interface for mapping faults from one system level to another, helping to carry out hierarchical test generation or hierarchical fault simulation in digital systems. Experiments have shown the feasibility and efficiency of the method compared to the classical stuck-at fault based approaches.
{"title":"Mapping physical defects to logic level for defect oriented testing","authors":"R. Ubar","doi":"10.1109/SCS.2003.1227087","DOIUrl":"https://doi.org/10.1109/SCS.2003.1227087","url":null,"abstract":"A uniform fault model for representing physical defects in components of digital circuits is introduced. Physical defects are modeled as parameters in generic Boolean differential equations. Solutions of the equations give the conditions at which defects are locally activated. The defect activation conditions are used as functional fault models on the logic level for fault simulation purposes. The functional fault model can be regarded also as an interface for mapping faults from one system level to another, helping to carry out hierarchical test generation or hierarchical fault simulation in digital systems. Experiments have shown the feasibility and efficiency of the method compared to the classical stuck-at fault based approaches.","PeriodicalId":375963,"journal":{"name":"Signals, Circuits and Systems, 2003. SCS 2003. International Symposium on","volume":"30 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":"131990605","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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