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Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)最新文献

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Active browsing with similarity pyramids 具有相似金字塔的主动浏览
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750864
Jau-Yuen Chen, C. Bouman, J. Dalton
{"title":"Active browsing with similarity pyramids","authors":"Jau-Yuen Chen, C. Bouman, J. Dalton","doi":"10.1109/ACSSC.1998.750864","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750864","url":null,"abstract":"Many approaches to content based retrieval of images have focused on query-by-example methods in which the database is searched for all images similar to an example image presented by the user. However query-by-example techniques tend to quickly converge to a small set of images that may not be of interest. In this paper we present an alternative method for content based search which is based on active browsing using a data structure called a similarity pyramid. The similarity pyramid organizes large databases into a three dimensional pyramid structure which the user can move through. During the browsing process, the user can give feed-back through the selection of a set of desirable images which we call a relevance set. Once selected the relevance set can be used to both prune and reorganize the similarity pyramid to best suit the user's task. A novel cross-validation method is also proposed for effectively performing pruning and reorganization operations.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133891897","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
The effect of mismatch on decision-feedback equalization and Tomlinson-Harashima precoding 错配对决策反馈均衡化和Tomlinson-Harashima预编码的影响
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.751623
Wei Shi, R. Wesel
{"title":"The effect of mismatch on decision-feedback equalization and Tomlinson-Harashima precoding","authors":"Wei Shi, R. Wesel","doi":"10.1109/ACSSC.1998.751623","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.751623","url":null,"abstract":"This paper examines the output SNR in decision-feedback equalizer (DFE) with channel mismatch at the receiver and under finite filter length constraints. A lower bound on the achievable rates for Tomlinson-Harashima (1971, 1972) precoding (THP) is also presented under mismatch and finite filter length constraints. With channel mismatch at both transmitter and receiver an asymptotic upper bound for a two-tap channel is derived when the input is i.i.d. uniform. Under finite filter length constraints, a four-tap maximum phase channel shows that the best solution is simply a linear equalizer (LE) for both DFE and THP systems. We derive the general conditions that a channel impulse response must satisfy to have LE as the optimal solution under a given finite length constraints and input SNR.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114152377","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
Adaptive data fusion processing: thoughts and perspectives 自适应数据融合处理:思想和观点
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750935
J. Llinas, T. Singh
{"title":"Adaptive data fusion processing: thoughts and perspectives","authors":"J. Llinas, T. Singh","doi":"10.1109/ACSSC.1998.750935","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750935","url":null,"abstract":"The focus of this paper is on stating the architecture of data fusion, revisiting the standard representation conceived of by the Data Fusion panels and describing the work carried out at the Center for Multisource Information Fusion (CMIF) at the State University of New York at Buffalo on the development of an adaptive fuzzy /spl alpha/-/spl beta/ target tracker. This paper discusses in detail, the /spl alpha/-/spl beta/-/spl gamma/ filter which is a sampled data target tracker, which can asymptotically track a constant acceleration target. The /spl alpha/-/spl beta/-/spl gamma/ filter is analyzed by determining the bounds on the /spl alpha/-/spl beta/-/spl gamma/ parameters for stability and for its noise filtering capability.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114376683","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 equalization via linearly constrained minimum variance processing 盲均衡通过线性约束最小方差处理
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.751574
L. Fertig, J. McClellan
{"title":"Blind equalization via linearly constrained minimum variance processing","authors":"L. Fertig, J. McClellan","doi":"10.1109/ACSSC.1998.751574","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.751574","url":null,"abstract":"A new cost function and a new adaptive structure for blind equalization of communications systems with FIR filters are proposed. It is first shown that the cost function of a previously proposed blind equalization algorithm can be expressed in a similar manner to that of the linearly constrained minimum variance (LCMV) problem (which arises in array processing). This new viewpoint permits a new understanding of the convergence behavior of the previously published technique, as well as the development of new approaches to blind equalization. In particular, a new \"RLS-like\" algorithm is developed that exhibits a convergence rate much faster than previously published algorithms of its class, with a modest increase in computational complexity.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114653780","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
Identification and removal of man-made transients from geomagnetic array time series: a wavelet transform based approach 地磁阵时间序列中人为瞬变的识别与去除:基于小波变换的方法
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.751548
T. T. Liu, A. Fraser-Smith
{"title":"Identification and removal of man-made transients from geomagnetic array time series: a wavelet transform based approach","authors":"T. T. Liu, A. Fraser-Smith","doi":"10.1109/ACSSC.1998.751548","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.751548","url":null,"abstract":"We address the problem of identifying and removing man-made transients from geomagnetic time series acquired with an array of magnetometers. We model the transients as scaling functions of unknown scales, amplitudes, and delays. We then use an undecimated discrete wavelet transform to identify the transients in the presence of the natural 1/f geomagnetic background. The identification criteria incorporate the temporal and spatial characteristics of the transients. Using maximum likelihood estimates of the transient parameters, we subtract the detected scaling functions from the original time series. The efficacy of the method is demonstrated with experimental data.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117153256","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
Exact and pth order equalization and linearization of recursive polynomial systems 递归多项式系统的精确和p阶均衡和线性化
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750950
A. Carini, J. V. Mathews, G. Sicuranza
{"title":"Exact and pth order equalization and linearization of recursive polynomial systems","authors":"A. Carini, J. V. Mathews, G. Sicuranza","doi":"10.1109/ACSSC.1998.750950","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750950","url":null,"abstract":"This paper presents a theory for the exact and the pth order equalization or linearization of nonlinear systems with known recursive polynomial input-output relationships. The equalizing and linearizing filters have simple and computationally efficient structures. The theory we present is an extension of the standard equalization technique for linear systems.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116133941","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 time series of decisions approach in detection systems 检测系统中的一种时间序列决策方法
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750938
A. Ashraf Mamdouh, R. Cristi, M. Tummala
{"title":"A time series of decisions approach in detection systems","authors":"A. Ashraf Mamdouh, R. Cristi, M. Tummala","doi":"10.1109/ACSSC.1998.750938","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750938","url":null,"abstract":"Time series of decisions in detection systems enable us to integrate the individual sensor's decisions to improve the detection performance. This paper considers the problem of optimum fusion structure in time series of decisions detection systems. The optimum local fusion structure that minimizes the total risk is derived. It is found that the optimum local fusion structure is the majority logic fusion strategy. The proposed structure is applied in the case of a single sensor detection system with Gaussian and exponentially distributed observations. Monte Carlo simulation is provided to evaluate the system performance. Significant performance improvement is achieved using the proposed structure. This structure enables us to exploit the benefits of data fusion even when we use a single sensor detection system.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116220943","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
Error correcting codes for robust transmission of scalable video bit-stream over fading channels 衰落信道上可扩展视频比特流鲁棒传输的纠错码
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750825
V. Gaddam, S.S. Rao
{"title":"Error correcting codes for robust transmission of scalable video bit-stream over fading channels","authors":"V. Gaddam, S.S. Rao","doi":"10.1109/ACSSC.1998.750825","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750825","url":null,"abstract":"The transmission of low bit rate video signals over wireless channels is considered. Fading channels introduces burst errors which cannot be corrected using conventional error correcting techniques. Turbo codes have been proved to be capable of giving better performance for bursty channels. Turbo codes are presented for use with a scalable video coder. Error correcting codes improve the transmission performance at the cost of the data rate. The channel capacity is taken into consideration and the coder is regulated to operate either in the basic mode or in the enhancement mode. A rate 1/2 turbo encoder with an interleaver length of 10000 bits and a recursive MAP decoder has been considered. Simulation results indicate that low bit error rates (BER<10/sup -4/) can be obtained in transmitting low bit rate video sequences over a wireless channel using turbo codes.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"601 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123190931","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
Analog digits: bit level redundancy in a binary multiplier 模拟数字:二进制乘法器中的位级冗余
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.750861
A. Saed, M. Ahmadi, G. Jullien
{"title":"Analog digits: bit level redundancy in a binary multiplier","authors":"A. Saed, M. Ahmadi, G. Jullien","doi":"10.1109/ACSSC.1998.750861","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.750861","url":null,"abstract":"The overlap resolution number system (ORNS) employs bit level residue arithmetic, and opens up a powerful approach to digital computing with analog processing elements. This new redundant representation of signals, with continuous valued digits, makes the accuracy of time sampled signal processing independent from the accuracy of the analog circuitry itself. A new proposed methodology for interfacing with binary numbers applies analog digits to digital arithmetic and introduces carry free bit level operations. Refreshment circuits warrant the validity of the analog digits, and the necessity and location of these circuits chiefly determine the complexity of a binary multiplier.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123213702","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
Closed-form blind channel identification with MSK inputs 具有MSK输入的封闭式盲信道识别
Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284) Pub Date : 1998-11-01 DOI: 10.1109/ACSSC.1998.751590
INPUTSPierre Comon, O. Grellier, Bernard Mourrain
{"title":"Closed-form blind channel identification with MSK inputs","authors":"INPUTSPierre Comon, O. Grellier, Bernard Mourrain","doi":"10.1109/ACSSC.1998.751590","DOIUrl":"https://doi.org/10.1109/ACSSC.1998.751590","url":null,"abstract":"Blind equalization of non-minimum phase FIR channels requires prior identification, for stability reasons. We present a novel algorithm that is able to identify a channel in the presence of an unknown MSK modulated input (which can be viewed as an approximation of the GMSK modulation used in GSM mobile systems), by resorting only to output second order moments. Blind identification is made possible because the input is not circular. It is shown that this approach leads to a system of L quadrics in L unknowns, if L denotes the number of taps of the unknown FIR channel. This system is then solved with the help of an original algorithm based on the resultant techniques. The performances in terms of bit error rates are also reported.","PeriodicalId":393743,"journal":{"name":"Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123225746","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: 15
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