发布求助
文献互助 智能选刊 最新文献

Proceedings of 27th Asilomar Conference on Signals, Systems and Computers最新文献

筛选
英文 中文
Time-varying modulated lapped transforms 时变调制交叠变换
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342562
J. Kovacevic, M. Vetterli
{"title":"Time-varying modulated lapped transforms","authors":"J. Kovacevic, M. Vetterli","doi":"10.1109/ACSSC.1993.342562","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342562","url":null,"abstract":"We consider the problem of time-varying orthonormal tilings of the time-frequency plane. A very elegant way of obtaining such tilings is by using time-varying modulated lapped transforms. We offer ways of constructing these, by using either boundary or overlapping modulated lapped transforms The advantage of using modulated lapped transforms is that all the filters, both at transitions and within decompositions, are obtained by modulation.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"32 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132870889","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
Blind adaptation using maximin algorithm 采用极大极小算法进行盲自适应
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342596
D. Torrieri, K. Bakhru
{"title":"Blind adaptation using maximin algorithm","authors":"D. Torrieri, K. Bakhru","doi":"10.1109/ACSSC.1993.342596","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342596","url":null,"abstract":"The maximin algorithm blindly adapts the complex weights of an antenna array to provide interference suppression in a frequency-hopping communication system. In the paper, the algorithm is derived and a digital implementation is presented. A typical example illustrates the ability of the maximin algorithm to rapidly form deep nulls in the directions of interferers.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133506264","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: 9
Determination of the dimension of a signal subspace 确定信号子空间的维数
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342405
A. A. Shah, D. Tufts
{"title":"Determination of the dimension of a signal subspace","authors":"A. A. Shah, D. Tufts","doi":"10.1109/ACSSC.1993.342405","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342405","url":null,"abstract":"A nested sequence of constant false alarm rate (CFAR) hypothesis tests is presented for rank determination. The procedure is based on the interpretation of sum of squares of singular values as energy in a particular subspace. The CFAR thresholds are set up based on distributions derived from matrix perturbation ideas. Expressions for probability of overestimation and underestimation are presented.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126582434","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
On computing and implementing the running higher order statistics 运行高阶统计量的计算与实现
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342375
R. J. Ferry, M. Amin
{"title":"On computing and implementing the running higher order statistics","authors":"R. J. Ferry, M. Amin","doi":"10.1109/ACSSC.1993.342375","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342375","url":null,"abstract":"The paper considers recursive bispectrum estimation using LTI filtering for time-average estimation of the third order cumulants. It is shown that by interchanging the order of time-average and Fourier transform, one of the filter poles can be first used to map the newly arrived time sample from the time-domain to the bispectrum-domain, The single pole-based recursive bispectrum estimate is then applied to the remaining filter singularities. The bispectrum estimate changes its characteristics as it is processed by each pole and zero. It is shown that cascade implementation of the time-averaging filter allows an easy access to distinct bispectrum estimators with different temporal-spectral resolution tradeoff. Systolic array implementation and simulations of the proposed form of recursive estimation are presented.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128878026","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 equalization techniques for interference suppression in shallow water acoustic telemetry channels 浅水声遥测信道干扰抑制的自适应均衡技术
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342352
Z. Zvonar, D. Brady, J. Catipovic
{"title":"Adaptive equalization techniques for interference suppression in shallow water acoustic telemetry channels","authors":"Z. Zvonar, D. Brady, J. Catipovic","doi":"10.1109/ACSSC.1993.342352","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342352","url":null,"abstract":"Despite the severe propagation conditions in shallow water acoustic telemetry channels, coherent high speed data transmission may be established using adaptive receivers based on a decision feedback equalizer (DFE) structure. The performance of a DFE in shallow water acoustic networks is affected by substantial cochannel interference from acoustic modems, in addition to extended, time-varying ISI and large Doppler fluctuations. In this paper we address the interference suppression ability of a DFE by evaluating a channel-specific structure for reliable interference suppression and dynamic channel tracking. The DFE performance is compared to adaptive multiuser receiver which jointly performs adaptive equalization and multiple-access interference cancellation.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127058788","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
A novel algorithm for 2-dimensional frequency estimation 一种新的二维频率估计算法
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342499
Calyampudi R. Rao, L. Zhao, B. Zhou
{"title":"A novel algorithm for 2-dimensional frequency estimation","authors":"Calyampudi R. Rao, L. Zhao, B. Zhou","doi":"10.1109/ACSSC.1993.342499","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342499","url":null,"abstract":"In this paper, an algorithm for 2-D frequency estimation is proposed. This algorithm consists of two parts. First, two sets of 1-D distinct frequencies are estimated separately. Then, the estimates of the 2-D frequencies are obtained by pairing the components in the two sets of estimated 1-D frequencies. The correct pairing is accomplished based on the fact that a vector in the signal subspace is orthogonal to the noise subspace of a 2-D signal. The capability of determining the number of signals is inherited in the proposed algorithm. Computer simulation results are provided to demonstrate the efficacy of the algorithm.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114440447","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: 11
A multiple-parameter generalization of the Tikhonov-Miller regularization method for image restoration 图像恢复中Tikhonov-Miller正则化方法的多参数泛化
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342448
C. Leung, W. Lu
{"title":"A multiple-parameter generalization of the Tikhonov-Miller regularization method for image restoration","authors":"C. Leung, W. Lu","doi":"10.1109/ACSSC.1993.342448","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342448","url":null,"abstract":"The Tikhonov-Miller regularization approach has long been utilized for restoring images that are contaminated by noise and are blurred due for example to camera defocusing or linear motion. It is posed as a least squares approximation problem in the l/sub 2/ space that provides a parameterized tradeoff between accuracy and smoothness of the restored image, with the tradeoff being controlled by a scalar regularization parameter. The authors generalize the Tikhonov-Miller method by incorporating multiple regularization parameters into the regularization process. As the regularization parameters can be chosen based on a frequency-domain criterion to better balance the approximation accuracy and solution smoothness, the proposed method leads to improved restoration of degraded noisy images as compared to the conventional regularization method.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116794224","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
A method for adaptive beamforming based on an inverse QR decomposition 基于逆QR分解的自适应波束形成方法
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342343
T. Ogunfunmi, Zhuobin Chen
{"title":"A method for adaptive beamforming based on an inverse QR decomposition","authors":"T. Ogunfunmi, Zhuobin Chen","doi":"10.1109/ACSSC.1993.342343","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342343","url":null,"abstract":"The inverse QR-based decomposition algorithm is applied to adaptive beamforming. The inverse QR algorithm employs orthogonal rotation operations to update the filter weights thereby preserving the inherent stability properties of the QR method for solving the recursive least squares (RLS) problem. The weight vector for the beamformer is updated in a recursive way while avoiding the highly serial backsubstitution step required in the QR algorithm for solving the RLS estimation problem. Furthermore, the inverse Cholesky factor of the inverse QR algorithm is always a full rank while the Cholesky factor of the direct QR algorithm may be of deficient rank. We have demonstrated the utility of the inverse QR algorithm in constrained (as well as unconstrained) adaptive filtering applications such as adaptive beamforming by modifying the recursive updates required in the algorithm for this application. Simulation results show that the inverse QR algorithm possesses rapid initial convergence typical of RLS-based algorithms and also maintains the long-term stability properties of the orthogonal rotation methods.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116879966","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
On the discrete wavelet transform and shiftability 离散小波变换及其可移性
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342297
F. Bao, N. Erdol
{"title":"On the discrete wavelet transform and shiftability","authors":"F. Bao, N. Erdol","doi":"10.1109/ACSSC.1993.342297","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342297","url":null,"abstract":"We analyze the relationship between the change that is observed in the wavelet coefficients when a signal is time shifted and the time and frequency distributions of the wavelet functions. We address the effects of shift variance and show how it can be useful.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117281794","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
Unbalanced non-binary tree-structured vector quantizers 非平衡非二叉树结构矢量量化器
Proceedings of 27th Asilomar Conference on Signals, Systems and Computers Pub Date : 1993-11-01 DOI: 10.1109/ACSSC.1993.342359
T. Schmidl, P. Cosman, R. Gray
{"title":"Unbalanced non-binary tree-structured vector quantizers","authors":"T. Schmidl, P. Cosman, R. Gray","doi":"10.1109/ACSSC.1993.342359","DOIUrl":"https://doi.org/10.1109/ACSSC.1993.342359","url":null,"abstract":"An established method for developing unbalanced binary tree-structured vector quantizers is greedy growing followed by optimal pruning. These algorithms can be extended to a hybrid binary/quaternary tree structure or to a pure quaternary tree structure. The trade-off of decreased distortion for increased rate is examined for the split into two or four children at each terminal node. The trees employing quaternary splits have smaller memory requirements for the codebook and provide slightly lower mean-squared-error on the test sequence as compared to a binary tree.<<ETX>>","PeriodicalId":266447,"journal":{"name":"Proceedings of 27th Asilomar Conference on Signals, Systems and Computers","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117313728","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
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