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2009 43rd Annual Conference on Information Sciences and Systems最新文献

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Analysis and optimization of distributed linear coding of Gaussian sources 高斯源分布式线性编码的分析与优化
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054680
I. Esnaola, J. Garcia-Frías
{"title":"Analysis and optimization of distributed linear coding of Gaussian sources","authors":"I. Esnaola, J. Garcia-Frías","doi":"10.1109/CISS.2009.5054680","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054680","url":null,"abstract":"Recent work has shown that compressed sensing can be successfully applied in distributed scenarios. In this framework, we study the exploitation of the correlation statistics in the encoding and recovery processes for independently transmitted Gaussian correlated sources, obtaining the optimal projection matrices in the MMSE sense. Encoding is performed separately for each source using either random or the aforementioned optimized projections. The effect of correlation and noise on the achievable rates obtained through MMSE estimation is studied analytically. Simulation results show a perfect match with the MMSE analysis.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130358989","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
An approximation of the capacity of a simple channel 一个简单信道容量的近似值
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054710
I. S. Moskowitz
{"title":"An approximation of the capacity of a simple channel","authors":"I. S. Moskowitz","doi":"10.1109/CISS.2009.5054710","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054710","url":null,"abstract":"We discuss the bounds for capacity of a binary-input binary-output discrete memoryless communication channel. We introduce a new lower bound that gives a very good and elementary approximation to the capacity","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134315667","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: 12
On the achievable rate of the fading dirty paper channel with imperfect CSIT 不完全CSIT条件下脏纸通道退色可达速率的研究
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054743
C. Vaze, M. Varanasi
{"title":"On the achievable rate of the fading dirty paper channel with imperfect CSIT","authors":"C. Vaze, M. Varanasi","doi":"10.1109/CISS.2009.5054743","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054743","url":null,"abstract":"The problem of dirty paper coding (DPC) over the (multi-antenna) fading dirty paper channel (FDPC) Y = H(X + S) + Z is considered when there is imperfect knowledge of the channel state information H at the transmitter (CSIT). The case of FDPC with positive definite (p.d.) input covariance matrix was studied by the authors in a recent paper, and here the more general case of positive semi-definite (p.s.d.) input covariance is dealt with. Towards this end, the choice of auxiliary random variable is modified. The algorithms for determination of inflation factor proposed in the p.d. case are then generalized to the case of p.s.d. input covariance. Subsequently, the largest DPC-achievable high-SNR (signal-to-noise ratio) scaling factor over the no-CSIT FDPC with p.s.d. input covariance matrix is derived. This scaling factor is seen to be a non-trivial generalization of the one achieved for the p.d. case. Next, in the limit of low SNR, it is proved that the choice of all-zero inflation factor (thus treating interference as noise) is optimal in the ‘ratio’ sense, regardless of the covariance matrix used. Further, in the p.d. covariance case, the inflation factor optimal at high SNR is obtained when the number of transmit antennas is greater than the number of receive antennas, with the other case having been already considered in the earlier paper. Finally, the problem of joint optimization of the input covariance matrix and the inflation factor is dealt with, and an iterative numerical algorithm is developed.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133312469","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: 13
Layered randomized cooperative multicast for lossy data: A superposition approach 有损数据的分层随机协同组播:一种叠加方法
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054740
Özgü Alay, Xin Pan, E. Erkip, Yao Wang
{"title":"Layered randomized cooperative multicast for lossy data: A superposition approach","authors":"Özgü Alay, Xin Pan, E. Erkip, Yao Wang","doi":"10.1109/CISS.2009.5054740","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054740","url":null,"abstract":"In this paper, we consider randomized distributed cooperation for multicasting a source signal with end-to-end distortion used as a performance metric. In order to provide differentiated quality to users with different channel strengths, we study layered cooperation where layers are transmitted simultaneously using superposition coding. We first formulate the problem and investigate the effect of power allocation of different layers on the distribution of end-to-end quality of users under a real-time delivery requirement. We then compare the proposed scheme with sequential layered transmission in which the layers are transmitted sequentially in time. Our results show that layered cooperation with superimposed layers outperforms sequential layered cooperation and provides a good alternative for multicast applications.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133713277","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
On the use of sample detectors in large distributed detection systems 样本检测器在大型分布式检测系统中的应用
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054825
Benedito J. B. Fonseca, J. A. Gubner
{"title":"On the use of sample detectors in large distributed detection systems","authors":"Benedito J. B. Fonseca, J. A. Gubner","doi":"10.1109/CISS.2009.5054825","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054825","url":null,"abstract":"This paper studies large distributed detection systems that are constrained to use local sample detectors in which sensors produce a binary output by comparing the measurement sample against a threshold. We focus on the problem of choosing between two system design options: spend resources to find optimum local thresholds or deploy additional sensors to compensate for non-optimum thresholds. To provide guidance for this decision, we determine sufficient conditions on the noise distribution to ensure that the overdeployment ratio required by the second option decreases to 1 as the signal-to-noise ratio decreases. We further illustrate that this conclusion is not reached by many noise distributions, including the uniform distribution.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130014338","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 sufficient condition for optimality of digital versus analog relaying in a sensor network 传感器网络中数字中继对模拟中继最优性的充分条件
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054717
Chandrashekhar Thejaswi Pataguppe Suryanarayan Bha, D. Cochran, Junshan Zhang
{"title":"A sufficient condition for optimality of digital versus analog relaying in a sensor network","authors":"Chandrashekhar Thejaswi Pataguppe Suryanarayan Bha, D. Cochran, Junshan Zhang","doi":"10.1109/CISS.2009.5054717","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054717","url":null,"abstract":"This paper compares the efficacy of digital versus analog relaying in a sensor network when the ultimate goal is detection. A simplified scenario is considered in which a binary decision is to be made at a fusion center based on data it receives from a single sensor. The sensor computes a statistic corresponding to its observations and forwards it over a noisy channel to the fusion center. Two relay schemes: “estimate-and-forward” (analog relaying) and “detect-and-forward” (digital relaying) are compared, in terms of the ultimate detection performance they support at the fusion center. With this performance criterion, the relative merit of the two schemes is shown to depend on the observation SNR at the sensor and the SNR of the communication link connecting the sensor and the fusion center. A sufficient condition, in terms of these SNRs, for the superiority of digital relaying over analog relaying is derived for this simple network model.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130050684","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
Optimizing power allocation in analog joint source-channel coding 模拟联合信源信道编码中功率分配的优化
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054693
Yichuan Hu, J. Garcia-Frías
{"title":"Optimizing power allocation in analog joint source-channel coding","authors":"Yichuan Hu, J. Garcia-Frías","doi":"10.1109/CISS.2009.5054693","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054693","url":null,"abstract":"We propose an analog joint source-channel coding scheme for the transmission of analog Gaussian sources over AWGN channels. The key idea is the combination of a 1:1 uncoded system in which source symbols are directly sent through the noisy channel and a 2:1 non-linear system in which two source outputs are mapped to one channel symbol using spacefilling curves. By doing so, the proposed scheme can achieve any bandwidth reduction ratio between 1:1 and 2:1. The main contribution of this paper is the derivation of the optimal power allocation between the two constituent systems in order to maximize the overall signal-to-distortion ratio (SDR).","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130107073","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
Message transmission and state estimation over Gaussian broadcast channels 高斯广播信道上的消息传输和状态估计
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054707
W. Liu, Biao Chen
{"title":"Message transmission and state estimation over Gaussian broadcast channels","authors":"W. Liu, Biao Chen","doi":"10.1109/CISS.2009.5054707","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054707","url":null,"abstract":"Motivated by [1], we consider the problem of simultaneous message transmission and state estimation over Gaussian broadcast channels. In particular, two independent messages are transmitted over a state dependent Gaussian broadcast channel with noncausal side information at the transmitter. The receivers, in addition to decode their own messages, also try to estimate the state information. Using squared-error distortion, we provide in this paper an inner bound and an outer bound for the optimal rate distortion tradeoff.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"6 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113959882","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
Speech enhancement using the multistage Wiener filter 使用多级维纳滤波器的语音增强
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054690
M. Tinston, Y. Ephraim
{"title":"Speech enhancement using the multistage Wiener filter","authors":"M. Tinston, Y. Ephraim","doi":"10.1109/CISS.2009.5054690","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054690","url":null,"abstract":"In this paper we develop a subspace speech enhancement approach for estimating a signal which has been degraded by additive uncorrelated noise. This problem has numerous applications such as in hearing aids and automatic speech recognition in noisy environments. The proposed approach utilizes the multistage Wiener filter (MWF). This filter is constructed from a Krylov subspace associated with the Wiener filter for this problem. The principles and performance of this approach are described. The approach provides signals with higher quality compared to the fullWiener filter and the signal subspace method as evident from informal subjective listening tests, the commonly used PESQ objective test and improved speech recognition performance. In informal listening tests the listeners preferred the MWF enhancement over the other enhancement methods.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"67 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113983482","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
Generating nested sets by leveraging “Carry-along Sort” algorithm 利用“随进排序”算法生成嵌套集
2009 43rd Annual Conference on Information Sciences and Systems Pub Date : 2009-03-18 DOI: 10.1109/CISS.2009.5054733
P. Sethuraman, L. Rajamani
{"title":"Generating nested sets by leveraging “Carry-along Sort” algorithm","authors":"P. Sethuraman, L. Rajamani","doi":"10.1109/CISS.2009.5054733","DOIUrl":"https://doi.org/10.1109/CISS.2009.5054733","url":null,"abstract":"This paper studies the latest research concept in Database Tree Encoding namely leveraging Carry-along Sort in Nested Set. To start with, the paper gives an introduction to the concept called “Carry-along Sort” and then applies this concept in Nested Set for generating hierarchies dynamically. There is no algorithm provides a flexibility to generate Nested Set as well materialized path together except “Carry-along Sort” algorithm. The paper also highlights on the future work that can be carried over in this area. The implementation of this new algorithm was done in Oracle and the complete algorithm was tested.","PeriodicalId":433796,"journal":{"name":"2009 43rd Annual Conference on Information Sciences and Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131849584","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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