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Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.最新文献

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A novel technique for face recognition using range imaging 一种基于距离成像的人脸识别新技术
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224850
Curt Hesher, Anuj Srivastava, G. Erlebacher
{"title":"A novel technique for face recognition using range imaging","authors":"Curt Hesher, Anuj Srivastava, G. Erlebacher","doi":"10.1109/ISSPA.2003.1224850","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224850","url":null,"abstract":"We consider a novel technique for recognizing people from range images (RI) of their faces. Range images have the advantage of capturing the shape variation irrespective of illumination variabilities. We describe a procedure for generating RI effaces using data from a 3D scanner, and registering them in the image plane by aligning salient facial features. For statistical analysis of RI, we use standard projections such as PCA and ICA, and then impose probability models on the coefficients. An experiment describing recognition effaces using the FSU 3D face database is presented.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122008398","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: 285
Symmetric eigenfilters for partial shortening in ADSL DMT transceivers ADSL DMT收发器部分缩短的对称特征滤波器
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224898
C. Ribeiro, Vítor Silva, P. Diniz
{"title":"Symmetric eigenfilters for partial shortening in ADSL DMT transceivers","authors":"C. Ribeiro, Vítor Silva, P. Diniz","doi":"10.1109/ISSPA.2003.1224898","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224898","url":null,"abstract":"A partial shortening method of equalization for xDSL is presented. The novel method is suitable for FDD systems, shortening the effective channel impulse response and, additionally, achieving out-of-band noise reduction. A family of solutions based on linear phase FIR equalizers is described. The mathematical framework for all symmetric filters is developed. Channel shortening and bit rate simulation results for several VDSL test loops, show that the novel method yields a similar performance and reduces the out-of-band noise, with a considerably lower mathematical complexity and a simpler implementation.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124623912","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
Direction finding using spatial polarimetric time-frequency distributions 利用空间极化时频分布进行测向
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224658
Yimin D. Zhang, M. Amin, B. A. Obeidat
{"title":"Direction finding using spatial polarimetric time-frequency distributions","authors":"Yimin D. Zhang, M. Amin, B. A. Obeidat","doi":"10.1109/ISSPA.2003.1224658","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224658","url":null,"abstract":"In this paper, we introduce the spatial polarimetric time-frequency distribution (SPTFD) as a platform to process nonstationary array signals with two orthogonal polarization components, such as horizontal and vertical. The use of dual polarization empowers the STFDs and improves the robustness of the respective signal and noise subspaces. With the additional polarimetric information, improved direction finding performance can be achieved. To demonstrate such advantages, the polarimetric time-frequency MUSIC (PTF-MUSIC) method is proposed based on the SPTFD platform and is shown to outperform the MUSIC techniques based on the time-frequency, polarimetric, and conventional methods.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124773841","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 rotationally symmetric partially coherent light and the moments of its Wigner distribution 旋转对称部分相干光及其维格纳分布矩
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224665
M. J. Bastiaans, T. Alieva
{"title":"On rotationally symmetric partially coherent light and the moments of its Wigner distribution","authors":"M. J. Bastiaans, T. Alieva","doi":"10.1109/ISSPA.2003.1224665","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224665","url":null,"abstract":"The Wigner distribution of rotationally symmetric partially coherent light is considered and the constraints for its moments are derived. While all odd-order moments vanish, these constraints lead to a drastic reduction in the number of parameters that we need to describe all even-order moments. A way to measure the moments as intensity moments in the output planes of (generally anamorphic but separable) first-order optical systems is presented.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128304683","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
Maximum likelihood angle-frequency parameter estimation in unknown noise fields for low-elevation target tracking 未知噪声场下低海拔目标跟踪的最大似然角频参数估计
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224903
M. Djeddou, S. Aouada, A. Zoubir
{"title":"Maximum likelihood angle-frequency parameter estimation in unknown noise fields for low-elevation target tracking","authors":"M. Djeddou, S. Aouada, A. Zoubir","doi":"10.1109/ISSPA.2003.1224903","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224903","url":null,"abstract":"In radar applications, the received echo signals reach the array elements via a multiplicity of paths even though there exist only one target. So, it is often relevant to estimate the direction and the Doppler frequency of each path ray. We apply in this paper a 2D extension of the approximate maximum likelihood (AML) algorithm to estimate these parameters using a sensor array in an unknown additive noise field. We consider the case where the complex fading factor fluctuates from one pulse repetition interval (PRI) to another one. Numerical simulations are provided to assess the performance of the approach, which is compared to the standard stochastic maximum likelihood derived for a white Gaussian noise.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128178190","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
Blind separation of dependent sources using the "time-frequency ratio of mixtures" approach 利用“混合时频比”方法对依赖源进行盲分离
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224820
F. Abrard, Y. Deville
{"title":"Blind separation of dependent sources using the \"time-frequency ratio of mixtures\" approach","authors":"F. Abrard, Y. Deville","doi":"10.1109/ISSPA.2003.1224820","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224820","url":null,"abstract":"In this paper, we first briefly recall the principles of the \"time-frequency ratio of mixtures\" (TIFROM) approach that we recently proposed. We then show that, unlike independent component analysis (ICA) methods, our approach can separate dependent signals, provided there exist some areas in the time-frequency plane where only one source occurs. We achieve this attractive property because, whereas ICA methods aim at creating independent output signals, we use another concept, i.e. we directly estimate the mixing matrix by using the time-frequency information contained in the observations. Detailed results concerning mixtures of voice and music signals are presented and show that this approach yields very good performance for signals, which cannot be separated with traditional ICA methods.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127031514","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: 57
Phase reconstruction from intensity measurements in one-parameter canonical-transform systems 单参数正则变换系统中强度测量的相位重建
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224772
M. J. Bastiaans, K. Wolf
{"title":"Phase reconstruction from intensity measurements in one-parameter canonical-transform systems","authors":"M. J. Bastiaans, K. Wolf","doi":"10.1109/ISSPA.2003.1224772","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224772","url":null,"abstract":"In this paper, we consider the one-parameter canonical transform of an optical signal and derive the relationship between its local spatial frequency (signal phase derivative) and the derivative of the squared modulus of the one-parameter canonical transform with respect to the parameter. From this relationship we conclude that the phase of the signal can be reconstructed by letting the signal propagate in an appropriate one-parameter canonical-transform system and then measure two intensity profiles for two close values of the parameter.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129156531","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
Asymptotic analysis of optimum and sub-optimum CDMA downlink MMSE receivers 最优和次最优CDMA下行MMSE接收机的渐近分析
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224747
Jean-Marie Chaufray, P. Loubaton, W. Hachem
{"title":"Asymptotic analysis of optimum and sub-optimum CDMA downlink MMSE receivers","authors":"Jean-Marie Chaufray, P. Loubaton, W. Hachem","doi":"10.1109/ISSPA.2003.1224747","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224747","url":null,"abstract":"In this paper, we investigate the performance of linear receivers for CDMA downlink transmissions over frequency selective channels, the users having possibly different powers. For large spreading factors and under some technical conditions, signal to interference and noise ratios (SINR) at the output of these receivers have simple and easily interpretable expressions. Free probability, a theory which studies in particular the asymptotic behavior of some large random matrices, is used. Two linear receivers are considered and compared: the MMSE receiver and a chip equalizer.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129167435","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: 38
Memory reduction and image quality enhancement method for classified vector quantization 分类矢量量化的内存减少和图像质量增强方法
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224654
H. Dujmic, N. Rožić, M. Russo
{"title":"Memory reduction and image quality enhancement method for classified vector quantization","authors":"H. Dujmic, N. Rožić, M. Russo","doi":"10.1109/ISSPA.2003.1224654","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224654","url":null,"abstract":"This paper considers new memory reduction and image quality enhancement method for classified vector quantization (CVQ) using symmetry reflection, rotation and inversion of edge subimages. These are used to join appropriate edge classes thus reducing memory requirements for edge codebooks by 4(8) times. Besides the memory reduction and increases of PSNR for images outside the training set our method also relieves codebook generation for high bit rate by reducing the number of images that should be inside the training set. The proposed method has been tested with two different classification methods in order to ensure generality of the method.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"5 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132432694","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
Improvement of the complex Reed Solomon decoding with application to impulse noise cancellation in Hiperlan2 Hiperlan2中复杂里德索罗门解码的改进及其在脉冲噪声消除中的应用
Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings. Pub Date : 2003-07-01 DOI: 10.1109/ISSPA.2003.1224895
F. Abdelkefi, P. Duhamel, F. Alberge
{"title":"Improvement of the complex Reed Solomon decoding with application to impulse noise cancellation in Hiperlan2","authors":"F. Abdelkefi, P. Duhamel, F. Alberge","doi":"10.1109/ISSPA.2003.1224895","DOIUrl":"https://doi.org/10.1109/ISSPA.2003.1224895","url":null,"abstract":"In OFDM system, pilot tones are emitted for synchronization or channel estimation purposes. These pilot tones are generally scattered among the information ones. We have proved in [Fatma Abdelkefi et al., 2001] that pilot tones can be used as syndromes, in order to correct impulse noise. We propose in [Fatma Abdelkefi et al., 2001], a decoding algorithm in three steps: (1) estimate the number of impulse noise, (2) seek the location, and (3) correct the errors. Two control tests are introduced: the first is at the beginning of the decoding algorithm in order to detect the presence of impulsive noise and the second is introduced after the decoding operation in order to detect malfunction. In this paper, we explain these two tests which are based on the Bayes test and on syndrome vector. This approach is new in impulse noise cancellation in multi-carrier transmission. The efficiency of this technique is also corroborated with simulations in the practical context of Hiperlan2.","PeriodicalId":264814,"journal":{"name":"Seventh International Symposium on Signal Processing and Its Applications, 2003. Proceedings.","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132312167","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
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