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2010 18th European Signal Processing Conference最新文献

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Relax-based estimation of Voigt lineshapes 基于松弛的Voigt线形状估计
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42185
Stefan Ingi Adalbjornsson, A. Jakobsson
{"title":"Relax-based estimation of Voigt lineshapes","authors":"Stefan Ingi Adalbjornsson, A. Jakobsson","doi":"10.5281/ZENODO.42185","DOIUrl":"https://doi.org/10.5281/ZENODO.42185","url":null,"abstract":"Most spectroscopic signals are well described as having either a Lorentzian or Gaussian lineshape, and the recent literature contains a variety of estimation approaches for such models. However, several experimental works indicate that such signals can be better described as having the more general Voigt lineshape, formed as the combination of the two. Due to the inherent complexity of this model, there exist few techniques to form estimates of the parameters of the Voigt model, with a numerical search of the multidimensional nonlinear least squares (LS) cost function being the typical solution. In this paper, we propose a parametric relax-based estimator that estimates the lineshape parameters recursively, one spectral line at a time. Numerical simulations using both simulated and real measurement data illustrate the performance gain of the proposed methods.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115797673","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
Flexible distributed wideband cognitive radio network with double threshold energy detector combining cooperative and spatial diversity 结合协同与空间分集的双阈值能量检测器柔性分布式宽带认知无线电网络
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42142
G. Ferré, Mickael Raoult
{"title":"Flexible distributed wideband cognitive radio network with double threshold energy detector combining cooperative and spatial diversity","authors":"G. Ferré, Mickael Raoult","doi":"10.5281/ZENODO.42142","DOIUrl":"https://doi.org/10.5281/ZENODO.42142","url":null,"abstract":"To improve the radio spectrum utilization, cognitive radio (CR) technology, which can dynamically use frequency bands detected as free, has been proposed. To provide this detection with sufficiently security for the licensed primary user (PU) and without a loss of CR capacity, spectrum sensing is a fundamental requirement in CR. Also, if this spectrum sensing is addressed for wideband, a current idea is to distribute it among all CRs in the network by dividing the wideband sensing into several sub-bands sensing. However, this physical spectrum division can be too wide to detect narrow band PU. In this paper, we propose to analyse digitally these sub-bands by using a numerical fast Fourier transform (FFT). This analysis is then made, in each sub-sub-bands, by a double threshold energy detection method. For a targeted probability of PU detection, simulation results show the possibilities of the proposed system when a multi-optimization problem is addressed.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115064445","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
Estimation of visual evoked potential latencies using Karhunen Loeve Transform method 基于Karhunen - Loeve变换的视觉诱发电位潜伏期估计
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42056
M. Yusoff
{"title":"Estimation of visual evoked potential latencies using Karhunen Loeve Transform method","authors":"M. Yusoff","doi":"10.5281/ZENODO.42056","DOIUrl":"https://doi.org/10.5281/ZENODO.42056","url":null,"abstract":"Estimating a signal which is buried inside colored noise is challenging since significant amount of the noise frequencies with considerable or higher power reside in the same band as that of the desired waveform. In this paper, an optimization- and Karhunen-Loeve Transform (KLT)-based approach has been investigated and tested to estimate the latencies of single-trial visual evoked potentials (VEPs) which are highly corrupted by colored electroencephalogram (EEG) noise. The normal voltage level for a VEP is around 10 μV and the background EEG is in the proximity of 100 μV, producing a signal-to-noise ratio (SNR) in the range of -10 dB. The studied method devices an explicit pre-whitening scheme aimed at producing a symmetric basis matrix, which eventually generates a unitary eigenvector matrix that simultaneously diagonalizes both the wanted signal and noise correlation matrices. The absolute diagonalization ensures full decorrelation of the observed signal, and permits the segregation of the transformed signal space into the \"signal plus noise subspace\" and \"noise only subspace.\" The performance of the KLT-based method in estimating VEP latencies has been assessed using comprehensively and realistically simulated data at SNR ranging from 0 to -10 dB, and real patient data gathered in a hospital. The technique produces reasonably high success rates, high accuracies and precisions, and narrow standard deviations in both experiments.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115128524","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
Computationally simple criteria for detecting a multi-target scenario in automotive radar array processing 汽车雷达阵列处理中检测多目标场景的简单计算准则
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42242
Philipp Heidenreich, David Stenmanns, A. Zoubir
{"title":"Computationally simple criteria for detecting a multi-target scenario in automotive radar array processing","authors":"Philipp Heidenreich, David Stenmanns, A. Zoubir","doi":"10.5281/ZENODO.42242","DOIUrl":"https://doi.org/10.5281/ZENODO.42242","url":null,"abstract":"The detection of a multi-target scenario in radar-array processing is a crucial step. When only a single source is present, the computationally efficient beamformer for direction-of-arrival (DOA) estimation is sufficient. When multiple sources are present, subspace-based DOA estimation is required to achieve high-resolution and unbiased estimation. To save computational cost, we propose computationally simple criteria for discriminating between a single-target and multi-target scenario in automotive radar-array processing. The suggested criteria can be applied with a single snapshot, and are therefore suitable for classic pulsed radar pre-processing. We present an empirical analysis of the proposed criteria, and show results with real-life data.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124876816","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: 5
Analysis of a multi-channel receiver: Wireless and PLC reception 多通道接收机的分析:无线和PLC接收
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41851
S. Güzelgöz, H. Çelebi, H. Arslan
{"title":"Analysis of a multi-channel receiver: Wireless and PLC reception","authors":"S. Güzelgöz, H. Çelebi, H. Arslan","doi":"10.5281/ZENODO.41851","DOIUrl":"https://doi.org/10.5281/ZENODO.41851","url":null,"abstract":"In line with the trend in wireless communications, power line communication (PLC) based systems recently draw considerable attention especially for wideband communication applications due to the advantages they offer. Parallel to the developments in communications and emergence of new concepts such as cognitive radio (CR), the ability to have access to both wireless and power line mediums might be of great value for future radios considering communication performance and reliability issues. In this study, performance of an ideal multi-channel receiver which is able to communicate thorough both wireless and PLC channels is considered. Two combining schemes that are selection combining (SC) and maximal ratio combining (MRC) are analyzed for fading compensation. Their statistics are derived and compared with the simulation results.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126257164","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: 26
Analysis of unknown velocity and target off the grid problems in compressive sensing based subsurface imaging 基于压缩感知的地下成像中未知速度和目标离网问题分析
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42198
A. Gurbuz
{"title":"Analysis of unknown velocity and target off the grid problems in compressive sensing based subsurface imaging","authors":"A. Gurbuz","doi":"10.5281/ZENODO.42198","DOIUrl":"https://doi.org/10.5281/ZENODO.42198","url":null,"abstract":"Sparsity of target space in subsurface imaging problem is used within the framework of the compressive sensing (CS) theory in recent publications to decrease the data acquisition load in practical systems. The developed CS based imaging methods are based on two important assumptions; namely, that the speed of propagation in the medium is known and that potential targets are point like targets positioned at discrete spatial points. However, in most subsurface imaging problems these assumptions are not always valid. The propagation velocity may only be known approximately, and targets will generally not fall on the grid exactly. In this work, the performance of the CS based subsurface imaging methods are analyzed for the above defined problems and possible solutions are discussed.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122144459","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: 5
A rejection sampling scheme for posterior probability distributions via the ratio-of-uniforms method 基于均匀比法的后验概率分布拒绝抽样方案
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.42189
Luca Martino, J. Míguez
{"title":"A rejection sampling scheme for posterior probability distributions via the ratio-of-uniforms method","authors":"Luca Martino, J. Míguez","doi":"10.5281/ZENODO.42189","DOIUrl":"https://doi.org/10.5281/ZENODO.42189","url":null,"abstract":"Accept/reject sampling is a well-known method to generate random samples from arbitrary target probability distributions. It demands the design of a suitable proposal probability density function (pdf) from which candidate samples can be drawn. The main limitation to the use of RS is the need to find an adequate upper bound for the ratio of the target pdf over the proposal pdf from which the samples are generated. There are no general methods to analytically find this bound, except when the target pdf is log-concave. In this paper we introduce a novel procedure using the ratio of uniforms method to efficiently perform rejection sampling for a large class of target densities. The candidate samples are generated using only two independent uniform random variables. In order to illustrate the application of the proposed technique, we provide a numerical example.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127033152","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
Structured Gaussian mixture model based product VQ 基于结构化高斯混合模型的产品VQ
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41946
S. Chatterjee, M. Skoglund
{"title":"Structured Gaussian mixture model based product VQ","authors":"S. Chatterjee, M. Skoglund","doi":"10.5281/ZENODO.41946","DOIUrl":"https://doi.org/10.5281/ZENODO.41946","url":null,"abstract":"In this paper, the Gaussian mixture model (GMM) based parametric framework is used to design a product vector quantization (PVQ) method that provides rate-distortion (R/D) performance optimality and bitrate scalability. We use a GMM consisting of a large number of Gaussian mixtures and invoke a block isotropic structure on the covariance matrices of the Gaussian mixtures. Using such a structured GMM, we design an optimum and bitrate scalable PVQ, namely an split (SVQ), for each Gaussian mixture. The use of an SVQ allows for a trade-off between complexity and R/D performance that spans the two extreme limits provided by an optimum scalar quantizer and an unconstrained vector quantizer. The efficacy of the new GMM based PVQ (GM-PVQ) method is demonstrated for the application of speech spectrum quantization.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124208248","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
Cubic phase function for two-dimensional polynomial-phase signals 二维多项式相位信号的三次相位函数
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41882
I. Djurović, Pu Wang, C. Ioana, M. Simeunović
{"title":"Cubic phase function for two-dimensional polynomial-phase signals","authors":"I. Djurović, Pu Wang, C. Ioana, M. Simeunović","doi":"10.5281/ZENODO.41882","DOIUrl":"https://doi.org/10.5281/ZENODO.41882","url":null,"abstract":"A cubic phase function for two-dimensional polynomial-phase signals of the third order (CPF 2-D) is proposed. The CPF 2-D based estimator is able to obtain all unknown parameters by using reduced number of phase differences, compared to the classical Francos-Friedlander (FF) approach. Statistical analysis shows that the proposed CPF 2-D based estimator is asymptotically unbiased and gives low mean squared error (MSE). Simulation results demonstrate that the proposed approach outperforms the FF approach.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130368903","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
On the appearance of a positive real pole in the results of glottal closed phase linear prediction 关于声门闭合相位线性预测结果中正实极的出现
2010 18th European Signal Processing Conference Pub Date : 2010-08-23 DOI: 10.5281/ZENODO.41933
A. D. Cinnéide, David Dorran, M. Gainza, E. Coyle
{"title":"On the appearance of a positive real pole in the results of glottal closed phase linear prediction","authors":"A. D. Cinnéide, David Dorran, M. Gainza, E. Coyle","doi":"10.5281/ZENODO.41933","DOIUrl":"https://doi.org/10.5281/ZENODO.41933","url":null,"abstract":"Often when performing glottal closed phase covariance linear prediction, a positive real pole can appear in the resulting filter transfer function. The commonly adopted approach is to discard this pole, as it does not fit with the usual model of the all-pole vocal tract filter. However, this real pole describes some aspect of the speech signal; this paper provides a novel perspective on its occurrence. This viewpoint has a useful implication to the speech community, especially from the perspective of fitting a glottal pulse to the inverse filtered signal, as the real pole describes the return phase of the glottal flow for certain voice types that adhere to a reasonable criterion. Tests with synthetic signals are performed to validate this approach.","PeriodicalId":409817,"journal":{"name":"2010 18th European Signal Processing Conference","volume":"8 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130821140","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
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