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[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis最新文献

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New signal-space orthonormal bases via the metaplectic transform 通过变形变换得到新的信号空间标准正交基
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274169
Richard Baraniuk, Douglas L. Jones
{"title":"New signal-space orthonormal bases via the metaplectic transform","authors":"Richard Baraniuk, Douglas L. Jones","doi":"10.1109/TFTSA.1992.274169","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274169","url":null,"abstract":"The discretization of the metaplectic transform (MT) is considered, and it is shown that it can lead to completely new orthonormal bases (ONBs) for the signal space of square integrable functions. Two new classes of bases, the scale-and-shear bases and the translation-and-shear bases, are derived to demonstrate the discretization process. Besides generalizing the current methods of generating time-frequency-concentrated ONBs, MT bases possess extra degrees of freedom that can be used to match a wider variety of signals.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126817858","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}
引用次数: 18
Time-frequency analysis with temporal and spectral resolution as the human auditory system 时间-频率分析与时间和频谱分辨率作为人类听觉系统
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274127
F. Agerkvist
{"title":"Time-frequency analysis with temporal and spectral resolution as the human auditory system","authors":"F. Agerkvist","doi":"10.1109/TFTSA.1992.274127","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274127","url":null,"abstract":"The human perception of sound is a suitable area for the application of a simultaneous time-frequency analysis, since the ear is selective in both domains. A perfect reconstruction filter bank with bandwidths approximating the critical bands is presented. The orthogonality of the filter makes it possible to examine the masking effect with realistic signals. The tree structure of the filter bank makes it difficult to obtain well-attenuated stop-bands. The use of filters of different length solves this problem.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126847163","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}
引用次数: 3
Chemical shift MR imaging using oscillating gradient fields-an approach by the short-time Fourier transform 利用振荡梯度场的化学位移磁共振成像-一种短时傅里叶变换的方法
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274114
K. Takaya
{"title":"Chemical shift MR imaging using oscillating gradient fields-an approach by the short-time Fourier transform","authors":"K. Takaya","doi":"10.1109/TFTSA.1992.274114","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274114","url":null,"abstract":"The author describes an approach to the problem of chemical-shift imaging using the short-time Fourier transform and the wavelet. When point sources of different chemical-shift values are measured with varying gradient field, these points travel along different loci in the instantaneous frequency vs. time diagram. Following the locus of a chemical-shift component of interest, the spatial distribution of the component can be observed with a varying degree of confidence. Taking an average over the profiles obtained at different gradient field intensities, the spatial profile solely due to a chemical-shift component can be reconstructed if each profile is scaled to the same bandwidth.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124731876","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}
引用次数: 0
A VLSI-architecture for fast wavelet computations 快速小波计算的vlsi架构
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274131
M. Sauer, J. Gotze
{"title":"A VLSI-architecture for fast wavelet computations","authors":"M. Sauer, J. Gotze","doi":"10.1109/TFTSA.1992.274131","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274131","url":null,"abstract":"A VLSI architecture for fast wavelet computations, i.e., for the construction of wavelet bases of arbitrary order and for the fast wavelet transform (FWT) using this basis, is presented. For the construction of the wavelet bases, an algebraic approach requiring only orthogonal matrix decompositions of the moment matrices and matrix-matrix multiplications is used. The FWT is executed on a dyadic tree of shuffle-like interconnections between the computational stages. These types of computation can be executed on a linear array of processors containing only adders and multipliers supported by a permutation network suited to VLSI and functioning as a shared memory.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114633815","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}
引用次数: 4
Wavelets and fractals: overview of their similarities based on different application areas 小波和分形:基于不同应用领域的相似性概述
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274203
C. Akujuobi, A.Z. Barniecki
{"title":"Wavelets and fractals: overview of their similarities based on different application areas","authors":"C. Akujuobi, A.Z. Barniecki","doi":"10.1109/TFTSA.1992.274203","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274203","url":null,"abstract":"Wavelets and fractals can be used as analysis tools in many areas of sciences and engineering. Some of the application areas, established or potential, are common for both wavelets and fractals. Application areas analyzed include modeling and seismic studies, construction and reconstruction of images, graphics, and storage and transmission of information. It is concluded that application similarities really exist between wavelets and fractals.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129937441","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}
引用次数: 2
Mean value jump detection using wavelet decomposition 利用小波分解进行均值跳跃检测
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274207
F. Castanie, A. Denjean
{"title":"Mean value jump detection using wavelet decomposition","authors":"F. Castanie, A. Denjean","doi":"10.1109/TFTSA.1992.274207","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274207","url":null,"abstract":"The problem of detecting a mean value jump of a stationary random process by means of the wavelet transform (WT) is studied. This is significant for general nonstationarity detection. The properties of the continuous and discrete transforms are investigated, and the SNR expression is derived. It is shown that the Haar wavelet is optimum with respect to this criterion, but the discrete wavelet transform (DWT) is shown to have some major drawbacks for this application. Various detection strategies are described and illustrated, showing that the WT is a powerful tool, even with very small SNR.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128806797","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}
引用次数: 6
Computational accuracy and stability issues for the finite, discrete Gabor transform 有限离散Gabor变换的计算精度和稳定性问题
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274132
R. Balart, R. Orr
{"title":"Computational accuracy and stability issues for the finite, discrete Gabor transform","authors":"R. Balart, R. Orr","doi":"10.1109/TFTSA.1992.274132","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274132","url":null,"abstract":"A Gabor expansion may use highly nonorthogonal basis functions and consequently inherit accuracy and stability problems due to near singularity when computed digitally. Two methods to discretize the Gabor transform are studied from the viewpoint of controlling numerical properties: a Zak-transform-based method and a matrix method. Theoretical issues relating to the singular behavior of each are cited, and stabilization techniques are proposed. The validity of each technique is demonstrated by results of numerical experiments. It is concluded that stability and accuracy can usually be achieved in a digitally implemented Gabor transform by proper choice of algorithm and stabilization mechanism.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133855898","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}
引用次数: 7
Detection of multiple chirp signals based on a slice of the instantaneous higher-order moments 基于瞬时高阶矩切片的多重啁啾信号检测
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274188
A. Petropulu
{"title":"Detection of multiple chirp signals based on a slice of the instantaneous higher-order moments","authors":"A. Petropulu","doi":"10.1109/TFTSA.1992.274188","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274188","url":null,"abstract":"A time-frequency (T-F) representation is proposed that is useful in the detection of multicomponent chirp signals. This representation is defined in terms of a slice of instantaneous higher-order moments of the signal, and forces the contribution of the auto terms to appear at fixed positions on the (T-F) plane, while the cross terms appear at positions that vary depending on the particular slice. The choice of the moment slice is not unique as long as it satisfies certain conditions. The consideration of different moment slices yields different T-F representations. The distributions corresponding to different moment slices cause only the parts due to the auto terms to add up, since their positions depend only on the signal parameters.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130101337","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}
引用次数: 1
A technique for estimating the parameters of multiple polynomial phase signals 多多项式相位信号参数估计技术
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274221
S. Peleg, B. Friedlander
{"title":"A technique for estimating the parameters of multiple polynomial phase signals","authors":"S. Peleg, B. Friedlander","doi":"10.1109/TFTSA.1992.274221","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274221","url":null,"abstract":"An iterative algorithm for estimating the parameters of multiple superimposed polynomial phase signals is presented. The algorithm is based on the ability of the discrete polynomial transform (DPT) to estimate the parameters of a polynomial phase signal in the presence of other interfering signals. The parameters of one of the signals having been estimated, it can be filtered out from the composite signal. The procedure is then applied to the remainder, which contains a smaller number of components. In extensive testing it was found that the algorithm works very well in general. It is able to reliably separate multiple signals and to accurately estimate their parameters.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115464686","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}
引用次数: 16
The ambiguity function of a linear signal space and its application to maximum-likelihood range/Doppler estimation 线性信号空间的模糊函数及其在最大似然距离/多普勒估计中的应用
[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI: 10.1109/TFTSA.1992.274153
F. Hlawatsch, G. Edelson
{"title":"The ambiguity function of a linear signal space and its application to maximum-likelihood range/Doppler estimation","authors":"F. Hlawatsch, G. Edelson","doi":"10.1109/TFTSA.1992.274153","DOIUrl":"https://doi.org/10.1109/TFTSA.1992.274153","url":null,"abstract":"The concept of the ambiguity function (AF) is extended to linear signal spaces. Some properties of the AF of a linear signal space, its relations with other space representations, and the results obtained for some specific signal spaces are discussed. It is shown that the AF of a signal space describes the performance of the maximum likelihood (ML) range/Doppler estimator for a slowly fluctuating point target when a series of orthogonal signal pulses are transmitted. This multipulse estimator is more accurate than a conventional signal-pulse estimator since the AF of a linear signal space may have arbitrarily good thumbtack shape.<<ETX>>","PeriodicalId":105228,"journal":{"name":"[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124503552","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}
引用次数: 6
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