发布求助
文献互助 智能选刊 最新文献

[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics最新文献

筛选
英文 中文
Image restoration using HOS and the Radon transform 基于HOS和Radon变换的图像恢复
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264593
E. Sayrol, C. Nikias, T. Gasull
{"title":"Image restoration using HOS and the Radon transform","authors":"E. Sayrol, C. Nikias, T. Gasull","doi":"10.1109/HOST.1993.264593","DOIUrl":"https://doi.org/10.1109/HOST.1993.264593","url":null,"abstract":"The authors propose the use of higher-order statistics (HOS) to study the problem of image restoration. They consider images degraded by linear or zero phase blurring point spread functions (PSF) and additive Gaussian noise. The complexity associated with the combination of two-dimensional signal processing and higher-order statistics is reduced by means of the Radon transform. The projection at each angle is an one-dimensional signal that can be processed by any existing 1-D higher-order statistics-based method. They apply two methods that have proven to attain good one-dimensional signal reconstruction, especially in the presence of noise. After the ideal projections have been estimated, the inverse Radon transform gives the restored image. Simulation results are provided.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115043712","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
Some results in the application of polyspectra to certain nonlinear communication systems 多光谱在非线性通信系统中的一些应用结果
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264601
N. Rozario, A. Papoulis
{"title":"Some results in the application of polyspectra to certain nonlinear communication systems","authors":"N. Rozario, A. Papoulis","doi":"10.1109/HOST.1993.264601","DOIUrl":"https://doi.org/10.1109/HOST.1993.264601","url":null,"abstract":"Polyspectral techniques are applied to model certain types of nonlinear systems frequently encountered in satellite communications. The power amplifier in such systems is usually operated close to saturation for best efficiency. Current practice is to model the amplifier as a memoryless nonlinearity. Such a model is inadequate if the transponder bandwidth is large. The RF sandwich model is considered. The identification of this model in the case of real signals has been done before. However, in communication systems, the signal is bandpass in nature, and AM/AM as well as AM/PM effects are observed. It is shown that a complex representation of the signal may be used to handle this case and extend the results reported by Brillinger (1977). In addition, by a further characterization of the sandwich model, the authors obtain its Weiner kernels and an extension of Bussgang's theorem.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123511202","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
Parametric signal analysis using the polynomial phase transform 参数信号分析采用多项式相变
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264577
B. Friedlander
{"title":"Parametric signal analysis using the polynomial phase transform","authors":"B. Friedlander","doi":"10.1109/HOST.1993.264577","DOIUrl":"https://doi.org/10.1109/HOST.1993.264577","url":null,"abstract":"Presents a tutorial discussion of the polynomial phase transform (PPT) and its application to estimating the parameters of complex signals with continuous phase and slowly varying amplitudes. The PPT-based algorithm provides suboptimal but computationally efficient estimates of the signal parameters. The performance of the algorithm on single-component signals is discussed in some detail. Preliminary results on estimating multicomponent signals are presently briefly. The PPT appears to be a practical approach to parametric modeling of a class of nonstationary signals.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124846351","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: 30
The bispectral aliasing test 双谱混叠测试
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264541
G. Frazer, A. Reilly, B. Boashash
{"title":"The bispectral aliasing test","authors":"G. Frazer, A. Reilly, B. Boashash","doi":"10.1109/HOST.1993.264541","DOIUrl":"https://doi.org/10.1109/HOST.1993.264541","url":null,"abstract":"Digital signal processing of continuous signals requires sampling of the continuous signal. When sampling continuous signals it is important to avoid the effect called aliasing. Aliasing causes signals at particular frequencies to appear, erroneously, as signals of different frequencies. Consequently, it is important that before any digital signal processing is performed, the sampled signal is known to be free of aliasing. A published test based on the bispectrum purports to be able to detect aliasing of an already sampled signal. The authors provide counter examples to demonstrate that this previously published test for aliasing is not valid in practice.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576370","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: 8
Edge detection using generalized higher-order statistics 基于广义高阶统计量的边缘检测
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264595
Sergio Carrato, G. Ramponi
{"title":"Edge detection using generalized higher-order statistics","authors":"Sergio Carrato, G. Ramponi","doi":"10.1109/HOST.1993.264595","DOIUrl":"https://doi.org/10.1109/HOST.1993.264595","url":null,"abstract":"A local operator is proposed which is able to extract the edges in an image through the evaluation of generalized higher-order statistical moments of the data. These moments are used for analyzing the asymmetry of the distribution of the data present in a small mask which scans the image. The advantage of the proposed algorithm is its robustness with respect to symmetrically distributed noise. Experimental results are reported which confirm the validity of the approach.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132485482","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: 10
Optimal linear quadratic detector for deterministic signals in impulsive noise 脉冲噪声中确定性信号的最优线性二次型检测器
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264547
V. P. Felix
{"title":"Optimal linear quadratic detector for deterministic signals in impulsive noise","authors":"V. P. Felix","doi":"10.1109/HOST.1993.264547","DOIUrl":"https://doi.org/10.1109/HOST.1993.264547","url":null,"abstract":"The detection of a known signal in additive noise consisting of a Poisson impulse process and an independent white Gaussian noise (WGN) is considered. Expressions for the fourth order cumulant of the Poisson impulse process is obtained in terms of the rate of the process and fourth moment of the impulse amplitudes. The linear quadratic detector (LQD) that maximizes the deflection is determined by the higher order moments of the combined noise. It is shown that the LQD consists of a matched filter and a quadratic filter which depends on the weighted signal correlation matrix, ss/sup T/. The performance of the LQD is evaluated by simulation.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129185191","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
On DOA estimation based on higher order statistics 基于高阶统计量的DOA估计
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264550
G. Scarano, A. Guidarelli Mattioli, G. Jacovitti
{"title":"On DOA estimation based on higher order statistics","authors":"G. Scarano, A. Guidarelli Mattioli, G. Jacovitti","doi":"10.1109/HOST.1993.264550","DOIUrl":"https://doi.org/10.1109/HOST.1993.264550","url":null,"abstract":"The authors present a DOA estimation procedure which is based on the assumption of highly correlated Gaussian noise contaminating nonGaussian sources, and which jointly employs second order statistics and higher order cumulants statistics. From second order statistics, they identify a set of candidate angles in which both true signal DOA's and spourious noise induced DOA's are present. Then, the signal DOA's are extracted by resorting to higher order statistics and to the nonGaussianity of the sources. Even though the estimates are biased when the noise is not fully correlated, simulation results show that, for SNR values below a certain threshold, this bias does not (significantly) affect the estimation accuracy and that the proposed approach outperforms the straight-forward application of Root-MUSIC to the matrix of fourth order cumulants.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123165808","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
On the robust estimation of cumulants 关于累积量的鲁棒估计
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264579
A. Nandi
{"title":"On the robust estimation of cumulants","authors":"A. Nandi","doi":"10.1109/HOST.1993.264579","DOIUrl":"https://doi.org/10.1109/HOST.1993.264579","url":null,"abstract":"Robust estimation of location algorithms are employed to estimate the third order cumulants of various lags from simulated signals representing the zero mean Uniform and Gaussian distributions (as examples of symmetric distributions). It is demonstrated that the biweight, wave, and median estimators provide consistent cumulant estimates of less variance than the (most common) mean estimator. This solves the problem with regard to symmetric distributions as these robust estimators have been designed for symmetric distribution. When these are applied to asymmetric distributions, biweight and wave estimators appear to give encouraging results. Further work with the particular emphasis on the estimation from asymmetric distributions is under way.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131233886","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
Quadratic phase coupling in auditory evoked potentials from healthy old subjects and subjects with Alzheimer's dementia 老年健康受试者与老年痴呆受试者听觉诱发电位的二次相耦合
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264535
V. Samar, K. Swartz, M. Raghuveer, A.L. Braveman, J.M. Centola, J.K. Jackson
{"title":"Quadratic phase coupling in auditory evoked potentials from healthy old subjects and subjects with Alzheimer's dementia","authors":"V. Samar, K. Swartz, M. Raghuveer, A.L. Braveman, J.M. Centola, J.K. Jackson","doi":"10.1109/HOST.1993.264535","DOIUrl":"https://doi.org/10.1109/HOST.1993.264535","url":null,"abstract":"Auditory evoked potentials (EPs) were recorded from healthy old (mean age 70) and Alzheimer's (mean age 75) subjects in four experimental oddball series. In three series, targets occurred randomly with global probabilities of 20, 50 and 80%. In the fourth series, targets occurred predictably every fifth tone (20% global probability). EPs were recorded at Fz, Cz, Pz, and left and right temporo-parietal sites. Bicoherence analyses revealed that quadratic phase coupling occurred in the EPs in the classic delta, theta, alpha, and beta EEG frequency bands. Quadratic phase coupling patterns displayed a fronto-central topography and varied directly with global stimulus probability. The data suggest an inverse relationship between P300 amplitude and degree of quadratic phase coupling in the delta band. Quadratic phase coupling patterns were altered in Alzheimer's patients. This is the first demonstration that task-dependent quadratic nonlinearities can be detected in transient evoked potentials.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125030176","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: 8
Gaussianity test for zero-skewed real and complex data 零偏斜实数据和复数据的高斯检验
[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI: 10.1109/HOST.1993.264542
A. Zoubir
{"title":"Gaussianity test for zero-skewed real and complex data","authors":"A. Zoubir","doi":"10.1109/HOST.1993.264542","DOIUrl":"https://doi.org/10.1109/HOST.1993.264542","url":null,"abstract":"Bispectrum based tests for Gaussianity of stationary processes such as Hinich's (1982) or Subba Rao and Gabr's (1980) test are not able to detect symmetric alternatives. Methods that use additionally the trispectrum have been proposed to decide whether a stationary process is Gaussian. Testing the trispectrum for zero is a complicated task from a computational as well as statistical point of view. Epps (1987) proposed a test for Gaussianity that is based on the differences between components of the sample and Gaussian characteristic functions of a real-valued stationary process. The aim of this paper is to extend Epps' idea to the complex case and to apply the test to the characterisation of backscattered clutter in over-the-horizon radar (OTHR). In OTHR, the complex signal is zero-skewed, and the amount of data available is small. In this case, a test for Gaussianity based on higher-order spectra is inappropriate.<<ETX>>","PeriodicalId":439030,"journal":{"name":"[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131419048","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: 10
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信