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Multi-path time delay estimation based on third order cross-moment 基于三阶交叉矩的多径时延估计
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1181038
Wen-kai Lu
{"title":"Multi-path time delay estimation based on third order cross-moment","authors":"Wen-kai Lu","doi":"10.1109/ICOSP.2002.1181038","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1181038","url":null,"abstract":"The cross-correlation is an effective tool for estimation of time delay between two signals. Unfortunately, in the practical world, there are always problems in multi-path time delay estimation (MTDE). The cross-correlation fails to deal with the MTDE case. In this paper, a novel technique for MTDE is proposed. The new method is based on the slice selection on the third order cross-moment (TOCM). It is well known that TOCM carries more information and is insensitive to additive Gaussian noise than does the second order statistics (SOS). This property leads to a robust and unique solution of MTDE by using our TOCM based approach.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128062304","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
Visualization of 3-D cerebral vascular tree from magnetic resonance angiography images 从磁共振血管造影图像中可视化三维脑血管树
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180078
Qin Zhongyuan, Mou Xuanqin, W. Ping, Cai Yuanlong
{"title":"Visualization of 3-D cerebral vascular tree from magnetic resonance angiography images","authors":"Qin Zhongyuan, Mou Xuanqin, W. Ping, Cai Yuanlong","doi":"10.1109/ICOSP.2002.1180078","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180078","url":null,"abstract":"This paper presents a general 3-D visualization method of cerebral vascular tree from Magnetic Resonance Angiography (MRA) images. First Gamma value and brightness are modified and each image is turned into binary ones. Then, vessels are extracted by the computation and then adaptive thresholding of region's areas. We stack the vessels to form 3-D volume data. The result is visualized in ANALYZE after linear interpolation using volume rendering. Satisfactory results to real angiographic data are obtained. It is helpful for analyzing and diagnosing the pathological changes of cerebral vessels.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124975309","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
Adaptive time-varying filter for linear FM signal in fractional Fourier domain 分数阶傅里叶域线性调频信号的自适应时变滤波器
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180060
Qi Lin, Tao Ran, Z. Siyong, Wang Yue
{"title":"Adaptive time-varying filter for linear FM signal in fractional Fourier domain","authors":"Qi Lin, Tao Ran, Z. Siyong, Wang Yue","doi":"10.1109/ICOSP.2002.1180060","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180060","url":null,"abstract":"The aim of the paper is to propose an adaptive method for filtering the linear FM signal embedded in white Gaussian noise. The proposed approach is based on the idea that the fractional Fourier transform for a signal is equivalent to rotating the signal on the time-frequency plane. The performance of the method is evaluated in terms of computational complexity and SNR improvement factor. Some theoretic analysis and simulation results are included to demonstrate the validity of the method. The results show that remarkable SNR improvement and tolerable signal distortion are obtained and, compared with two other dimension time-frequency filtering algorithms, the method is easy in computation and simple in implementation.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130842751","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: 17
Improved weighting vector selection method in maximum ratio transmission over flat Rayleigh fading channels 平坦瑞利衰落信道中最大传输比的改进加权矢量选择方法
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180025
Pingyi Fan, Z. Cao, X. Xia
{"title":"Improved weighting vector selection method in maximum ratio transmission over flat Rayleigh fading channels","authors":"Pingyi Fan, Z. Cao, X. Xia","doi":"10.1109/ICOSP.2002.1180025","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180025","url":null,"abstract":"We investigate the principle of maximum ratio transmission (MRT) for flat Rayleigh fading channels. Theoretical analysis indicates that the overall signal to noise ratio gain of MRT by using the multiple antennas for both transmission and reception can be maximized by selecting the weighting vector properly. It can be considered as an expansion of that presented by Lo (IEEE Trans. Comm. vol.47, no.10, p.1458-61, 1999).","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121640287","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
Novel preprocessing technique to improve harmonic distortion in airborne parametric array 一种改善机载参数阵列谐波失真的新型预处理技术
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180156
Young wook Kim, Sung il Kim
{"title":"Novel preprocessing technique to improve harmonic distortion in airborne parametric array","authors":"Young wook Kim, Sung il Kim","doi":"10.1109/ICOSP.2002.1180156","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180156","url":null,"abstract":"A novel modified preprocessing technique is proposed to reduce harmonic distortion in an airborne parametric array, which is designed to reproduce highly directed audible sound. This technique is based on the idea that the harmonic distortion is not fully canceled around 10 kHz because of the mismatch of phase and amplitude, even though previous simple preprocessing is activated. A digital filter is designed to compensate for this phase and amplitude mismatch. This linearization technique is verified by an experiment with an airborne parametric array for which the carrier frequency was 40 kHz. The results show that the second harmonic is reduced 11 dB and total harmonic distortion (THD) is improved 20% around 10 kHz compared to previous preprocessing. The proposed modified preprocessing is effective and good results render this technique suitable for the reproduction of high quality audible sound with high directivity.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122477844","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
A configurable micro network kernel dedicated to real-time distributed embedded network sensor: telemedicine applications 一个可配置的微网络内核，专门用于实时分布式嵌入式网络传感器:远程医疗应用
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180140
Haiying Zhou, P. Palau, C. de Vaulx, Jianjin Li, Chengcheng Guo, A. Quilliot, K. Hou
{"title":"A configurable micro network kernel dedicated to real-time distributed embedded network sensor: telemedicine applications","authors":"Haiying Zhou, P. Palau, C. de Vaulx, Jianjin Li, Chengcheng Guo, A. Quilliot, K. Hou","doi":"10.1109/ICOSP.2002.1180140","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180140","url":null,"abstract":"The real-time embedded basic software including real-time kernel and Internet standard communication protocols (TCP/IP, PPP) is a key element to implement distributed embedded intelligent network sensors 'DEINS'. DEINS is a need of modem life and its application fields are diverse: telemedicine, remote home automation, distributed embedded process control etc. In fact, distributed embedded intelligent sensor is mass production, thus it must be cheap to realize and power efficient. However performance requirements as well as cost, power-consumption and real-time constraints may be satisfied by adequately tuning hardware and software. This article describes a configurable real-time micro network kernel 'C/spl mu/NEK' that combines tightly a super-small real-time micro kernel with a modular embedded Internet standard communication protocol such as TCP/IP stack and PPP. The defined system is implemented on a Spectrum EVM board based on TMS320C5410 and is used to implement a prototype of a DEINS dedicated to remote heart arythmia detection.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121365141","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
Locally regularised orthogonal least squares algorithm for the construction of sparse kernel regression models 局部正则化正交最小二乘算法构建稀疏核回归模型
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1180013
Sheng Chen
{"title":"Locally regularised orthogonal least squares algorithm for the construction of sparse kernel regression models","authors":"Sheng Chen","doi":"10.1109/ICOSP.2002.1180013","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1180013","url":null,"abstract":"The paper proposes to combine orthogonal least squares (OLS) model selection with local regularisation for efficient sparse kernel data modelling. By assigning each orthogonal weight in the regression model with an individual regularisation parameter, the ability for the OLS model selection to produce a very parsimonious model with excellent generalisation performance is greatly enhanced.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116411803","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: 29
Image classification for quality compression with wavelet filters based on image feature analysis 基于图像特征分析的小波滤波图像质量压缩分类
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1181207
R. Tjahyadi, Wanquan Liu
{"title":"Image classification for quality compression with wavelet filters based on image feature analysis","authors":"R. Tjahyadi, Wanquan Liu","doi":"10.1109/ICOSP.2002.1181207","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1181207","url":null,"abstract":"In this paper, we propose a method to extract features from images that may be related to their compression capability with wavelet filters - their fidelity. Based on these features, images are classified into three different classes corresponding to their fidelity: low, medium and high. We have found this classification schema is effective and can be used as a guideline for selecting wavelet filter for the images in the low fidelity class.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116528853","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 method of hand tracking based on articulated model 一种基于关节模型的手部跟踪方法
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1179947
Hang Zhou, Q. Ruan
{"title":"A method of hand tracking based on articulated model","authors":"Hang Zhou, Q. Ruan","doi":"10.1109/ICOSP.2002.1179947","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1179947","url":null,"abstract":"In this paper, we discuss hand modeling, constraint analysis and associated tracking. We take advantage of several correlations between joint rotations in the hand to reduce the number of degrees of freedom in the model and provide a simple and intuitive model. In the second step, an improved tracking algorithm is proposed to detect the region of the fingers. The temporal evolution of the probability density is achieved through sampling from the prior distribution, followed by local optimization of the sample positions to obtain updated modes. It is a good precondition for gesture recognition.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127076821","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
The beamforming for an adaptive antenna system in multi-vehicles TT&C environment 多车测控环境下自适应天线系统的波束形成
6th International Conference on Signal Processing, 2002. Pub Date : 2002-08-26 DOI: 10.1109/ICOSP.2002.1181064
Feng Wenjiang, Zhong Yuan-chang, Zhao Feng, Yang Shizhong
{"title":"The beamforming for an adaptive antenna system in multi-vehicles TT&C environment","authors":"Feng Wenjiang, Zhong Yuan-chang, Zhao Feng, Yang Shizhong","doi":"10.1109/ICOSP.2002.1181064","DOIUrl":"https://doi.org/10.1109/ICOSP.2002.1181064","url":null,"abstract":"In a multi-vehicle environment, a TT&C (tracking, telemetry and command) system is realized through a unified spread spectrum framework. Adaptive antenna digital beamforming technologies are used to track, measure and command objects. A constant modulus array (CMA) and an adaptive signal canceller estimate the direction of arrival (DOA) of every signal and use the optimum weighted vector to form the beams. The phase-weighted vectors estimated from the DOA improve the processing gain as well as being utilized in transmitting a tele-command signal to form the beam for a specified object. Its processing performance is researched and simulated.","PeriodicalId":159807,"journal":{"name":"6th International Conference on Signal Processing, 2002.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127132340","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
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