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Proceedings of IEEE 6th Digital Signal Processing Workshop最新文献

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Observed (mis)behavior of CMA with periodic sources: assessment and guidelines 观察到的(错误)CMA行为与定期来源:评估和指南
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379827
F.L. de Victoria, A. Bosser, I. Fijalkow, C. R. Johnson, J. Treichler
{"title":"Observed (mis)behavior of CMA with periodic sources: assessment and guidelines","authors":"F.L. de Victoria, A. Bosser, I. Fijalkow, C. R. Johnson, J. Treichler","doi":"10.1109/DSP.1994.379827","DOIUrl":"https://doi.org/10.1109/DSP.1994.379827","url":null,"abstract":"In the analysis of adaptive systems without training sequences, often termed \"blind\", a common assumption is to have a white source to excite the system. However, a condition which arises in practical systems is presented which does nor conform to the white source condition. A periodic symbol sequence at the input can steer the adaptation process to a solution which is not the desired solution. This (mis)behavior does arise when the equalizer is adapted with the constant modulus algorithm (CMA) and the periodic signal is nor constant modulus. The paper explores the conditions which lead to this (mis)behavior.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122627720","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
Multiscale synthesis and analysis of fractal renewal processes 分形更新过程的多尺度综合与分析
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379874
W. M. Lam, G. Wornell
{"title":"Multiscale synthesis and analysis of fractal renewal processes","authors":"W. M. Lam, G. Wornell","doi":"10.1109/DSP.1994.379874","DOIUrl":"https://doi.org/10.1109/DSP.1994.379874","url":null,"abstract":"A novel multiscale framework is introduced for the representation of a class of fractal point processes. Using this framework, efficient algorithms are developed for the synthesis of fractal point processes from a mixture of Poisson processes. Multiscale analysis algorithms are also developed within this framework for computing Maximum-Likelihood fractal dimension estimates of such processes from corrupted observations.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115936327","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
Higher order spectra and the trispectrum 高阶光谱和三阶光谱
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379870
W. Collis, P. White, J. Hammond
{"title":"Higher order spectra and the trispectrum","authors":"W. Collis, P. White, J. Hammond","doi":"10.1109/DSP.1994.379870","DOIUrl":"https://doi.org/10.1109/DSP.1994.379870","url":null,"abstract":"In this paper we discuss some of the theory behind the trispectrum and look at the methods used to display it. The trispectrum is normalised to form the tricoherence and the use of the tricoherence in detecting quadratic and cubic phase coupling is shown. Finally, an application of the trispectrum in detecting gas bubbles in water is discussed.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131589007","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
Decorrelation algorithm for blind decision feedback equalizer with lattice structures 格结构盲决策反馈均衡器的去相关算法
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379829
A. Bateman, Y. Bar-Ness, R. Kamel
{"title":"Decorrelation algorithm for blind decision feedback equalizer with lattice structures","authors":"A. Bateman, Y. Bar-Ness, R. Kamel","doi":"10.1109/DSP.1994.379829","DOIUrl":"https://doi.org/10.1109/DSP.1994.379829","url":null,"abstract":"A new algorithm was previously introduced for blind, adaptive equalization, known as the decorrelation algorithm. The algorithm is based on decorrelating the input to the decision or threshold device of a decision feedback equalizer to reduce the intersymbol interference at the equalizer's output. To increase the rate of convergence of this blind, adaptive, decision feedback equalizer, a fast Kalman structure was proposed, but not without a dramatic increase in complexity and limited numerical stability. In the present paper, more computationally efficient lattice-based structures are proposed. Using the decorrelation algorithm to control these structures, the authors maintain a high rate of convergence with better numerical stability in finite-precision environments.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115012917","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
Sigma delta modulation of a chaotic time series: a non-linear signal in a non-linear system 混沌时间序列的σ δ调制:非线性系统中的非线性信号
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379867
G. Ushaw, S. Mclaughlin
{"title":"Sigma delta modulation of a chaotic time series: a non-linear signal in a non-linear system","authors":"G. Ushaw, S. Mclaughlin","doi":"10.1109/DSP.1994.379867","DOIUrl":"https://doi.org/10.1109/DSP.1994.379867","url":null,"abstract":"Sigma delta modulators are a form of analogue to digital converter used in a broad range of signal processing environments. There has been speculation recently that such devices may be capable of chaotic modes of operation. The first section of this paper examines this possibility. There is also a greater concern that, due to the non-linear nature of these devices, sigma-delta modulation of a chaotic signal may affect the long-term predictability of that signal. This is examined by considering a range of invariant geometric properties of a signal before and after sigma delta modulation, including the Lyapunov exponents and the correlation dimension. It is shown that, although the sigma delta modulator is not in itself a chaotic system, it can affect these geometric properties and therefore the predictability of the signal being measured.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133344775","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
Methods for acoustic data synthesis 声学数据合成方法
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379849
Charles W. Therrien, Roberto Cristi, David E. Allison
{"title":"Methods for acoustic data synthesis","authors":"Charles W. Therrien, Roberto Cristi, David E. Allison","doi":"10.1109/DSP.1994.379849","DOIUrl":"https://doi.org/10.1109/DSP.1994.379849","url":null,"abstract":"The paper deals with the problem of synthesizing a given class of sounds from recorded original data. An analysis/synthesis procedure is used, but variation is deliberately introduced in the synthesis step to broaden the set of sounds that are produced. Two methods are described: one that treats the sound as a deterministic signal and one that treats it as a realization of a nonstationary stochastic process. The two methods can be applied separately or used together in a deterministic/stochastic decomposition of the data.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128393961","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
Wiener-optimum linear detectors for non-Gaussian channels 非高斯信道的维纳最优线性检测器
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379861
D.H. Johnson
{"title":"Wiener-optimum linear detectors for non-Gaussian channels","authors":"D.H. Johnson","doi":"10.1109/DSP.1994.379861","DOIUrl":"https://doi.org/10.1109/DSP.1994.379861","url":null,"abstract":"Optimal detectors for non-Gaussian channels are nonlinear, and are therefore sensitive to problem parameters. We describe a technique for designing linear detectors for arbitrary additive noise channels that takes into account dependence structure, amplitude distribution, and transmitted signals. This technique is based on Wiener's theory of nonlinear systems, and amounts to cross-correlating the optimal detector's output with its input when it is driven by white Gaussian noise. We have not proven this linear detector's optimality; simulations demonstrate that it has some of the properties required of optimal detectors in several cases.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133333726","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
Optimal least squares FIR multiband filter design 最优最小二乘FIR多带滤波器设计
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379838
C. Burrus
{"title":"Optimal least squares FIR multiband filter design","authors":"C. Burrus","doi":"10.1109/DSP.1994.379838","DOIUrl":"https://doi.org/10.1109/DSP.1994.379838","url":null,"abstract":"The paper presents three approaches to multiband FIR filter design. One is analytical, using spline transition band functions, but allows no error weighting. The second allows error weighting but requires solving simultaneous equations which may be ill conditioned. The third looks at the signal characteristics and poses a peak constrained least squares approximation with no zero weighted transition band as best suiting practical design specifications.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123787046","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
Polygon reconstruction from moments using array processing 使用数组处理从矩多边形重建
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379852
P. Milanfar, G. Verghese, W. Karl, A. Willsky
{"title":"Polygon reconstruction from moments using array processing","authors":"P. Milanfar, G. Verghese, W. Karl, A. Willsky","doi":"10.1109/DSP.1994.379852","DOIUrl":"https://doi.org/10.1109/DSP.1994.379852","url":null,"abstract":"We prove a set of results showing that the vertices of any simply-connected planar polygonal region can be reconstructed from a finite number of its complex moments using array processing. In particular, we derive and illustrate several new algorithms for the reconstruction of the vertices of simply-connected polygons from moments. These results find applications in a variety of apparently disparate areas such as computerized tomography and inverse potential theory, where in the former it is of interest in estimating the shape of an object from a finite number of its projections; while in the latter, the objective is to extract the shape of a gravitating body from measurements of its exterior logarithmic potentials at a finite number of points. The applications of the algorithms, we develop, to tomography hence expose a seemingly deep connection between the fields of tomography and array processing. This connection implies that a host of numerical algorithms such as MUSIC, Min-norm, and Prony are now available for application to tomographic reconstruction problems.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126284972","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
Application of a low-delay bank of filters to speech coding 低延迟滤波器组在语音编码中的应用
Proceedings of IEEE 6th Digital Signal Processing Workshop Pub Date : 1994-10-02 DOI: 10.1109/DSP.1994.379837
C. García-Mateo, L. Rodríguez-Liñares
{"title":"Application of a low-delay bank of filters to speech coding","authors":"C. García-Mateo, L. Rodríguez-Liñares","doi":"10.1109/DSP.1994.379837","DOIUrl":"https://doi.org/10.1109/DSP.1994.379837","url":null,"abstract":"Applies an FIR QMF filter bank to compute the long-term prediction in a CELP coder. By splitting the frequency spectrum of the past excitation signal, a different pitch lag and gain factor can be attached to each frequency band. This strategy improves the quality of the synthetic speech, providing much more natural sounding voice. The filter bank must be designed to abide by some requirements related to low and nearly-constant group delay and band aliasing, rather than to accomplish perfect reconstruction of the output signal. In the design, which employs two-band splitting, the authors have relaxed the usual condition of linear-phase in favor of achieving less aliasing between bands.<<ETX>>","PeriodicalId":189083,"journal":{"name":"Proceedings of IEEE 6th Digital Signal Processing Workshop","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121504121","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
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