发布求助
文献互助 智能选刊 最新文献

Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.最新文献

筛选
英文 中文
Throughput Maximization In Multiple Antenna Communication Systems Through Quantized Rate Control 基于量化速率控制的多天线通信系统吞吐量最大化
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599828
M. Khojastepour, Xiaodong Wang, M. Madihian
{"title":"Throughput Maximization In Multiple Antenna Communication Systems Through Quantized Rate Control","authors":"M. Khojastepour, Xiaodong Wang, M. Madihian","doi":"10.1109/ACSSC.2005.1599828","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599828","url":null,"abstract":"In the recent years, we have witnessed an increasing demand for the high data rate wireless communication systems. While most of the research efforts has been focused on the minimization of the packet error probability through an adaptive transmission scheme, the overall optimization of the system throughput is not well addressed. We consider the problem of throughput maximization using a quantized feedback that is an appropriate model for practical systems with limited feedback capacity. We derive the optimal quantized rate control design for general multiple transmit and multiple receive antenna systems. Moreover, an adaptive stochastic gradient search algorithm has been proposed that can efficiently find the optimal solution. It is shown that the proposed quantized rate control design with only a few bits of feedback considerably improves the throughput of a system for a given average power","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129791808","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
Image Denoising by Adaptive Kernel Regression 基于自适应核回归的图像去噪
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1600051
H. Takeda, Sina Farsiu, P. Milanfar
{"title":"Image Denoising by Adaptive Kernel Regression","authors":"H. Takeda, Sina Farsiu, P. Milanfar","doi":"10.1109/ACSSC.2005.1600051","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1600051","url":null,"abstract":"This paper introduces an extremely robust adaptive denoising filter in the spatial domain. The filter is based on non-parametric statistical estimation methods, and in particular generalizes an adaptive method proposed earlier by Fukunaga [1]. To denoise a pixel, the proposed filter computes a locally adaptive set of weights and window sizes, which can be proven to be optimal in the context of non-parametric estimation using kernels. While we do not report analytical results on the statistical efficiency of the proposed method in this paper, we will discuss its derivation, and experimentally demonstrate its effectiveness against competing techniques at low SNR and on real noisy data.","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128717783","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: 7
Analysis of Cyclic-Prefix Correlation Statistics and their Use in OFDM Timing and Frequency Synchronization 循环前缀相关统计分析及其在OFDM定时和频率同步中的应用
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1600009
B. Krongold
{"title":"Analysis of Cyclic-Prefix Correlation Statistics and their Use in OFDM Timing and Frequency Synchronization","authors":"B. Krongold","doi":"10.1109/ACSSC.2005.1600009","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1600009","url":null,"abstract":"OFDM systems generally utilize a periodic extension, or cyclic prefix, to aid in equalization at the receiver. The cyclic prefix also incorporates a special autocorrelation structure into the signal that can be used for timing, carrier recovery, and delay-spread estimation. Central to these techniques is estimating the N-lag correlation function at the receiver, and in this paper, we analyze this function and its estimation error and discuss the resulting performance effects. Often overlooked is the dispersive nature of the channel, as many techniques are derived under a non-dispersive model out of convenience. The dispersive channel also results in correlated estimation error, which can significantly certain algorithms.","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129566659","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
Efficient Timing and Frequency Offset Estimation in OFDM Systems OFDM系统中有效的定时和频偏估计
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1600012
H. Huh, T. Pande, J. Krogmeier
{"title":"Efficient Timing and Frequency Offset Estimation in OFDM Systems","authors":"H. Huh, T. Pande, J. Krogmeier","doi":"10.1109/ACSSC.2005.1600012","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1600012","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is a bandwidth efficient modulation scheme used widely for high speed data communication. Fast and ro- bust synchronization algorithms are necessary for OFDM systems operating in burst mode like WLANs. In this paper, we propose an efficient timing and carrier frequency synchronization method for OFDM. The proposed scheme needs only one OFDM symbol for both symbol/frame timing and frequency offset estimation, while previous synchronization algorithms need more than two OFDM symbols as a training sequence. Numerical analysis shows that the proposed frequency estimator nearly achieves the Cramer-Rao lower bound for the variance of the frequency offset estimate, despite the reduction in the training sequence length.","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127223673","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
Sinusoidal Prediction for Waveform Coding 波形编码的正弦预测
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599884
W. Chu
{"title":"Sinusoidal Prediction for Waveform Coding","authors":"W. Chu","doi":"10.1109/ACSSC.2005.1599884","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599884","url":null,"abstract":"A novel prediction scheme referred to as sinusoidal prediction (SP) is described, which can be used for redundancy removal in audio signals. The scheme works by extracting a number of sinusoids from the input signal inside an interval, a subset of the extracted sinusoids is selected and used to oscillate toward the future to form a prediction. The performance of SP is measured under various conditions, with the design of an SP- based waveform coder presented. II. SINUSOIDAL PREDICTION","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128920608","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
Multiple Description Conjugate Vector Quantizers with Side Distortion Compensation 具有侧失真补偿的多重描述共轭矢量量化器
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599812
Yugang Zhou, W. Chan
{"title":"Multiple Description Conjugate Vector Quantizers with Side Distortion Compensation","authors":"Yugang Zhou, W. Chan","doi":"10.1109/ACSSC.2005.1599812","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599812","url":null,"abstract":"Conjugate vector quantizer (CVQ), a joint source channel coding scheme robust to channel bit errors, is used in various popular speech coders such as ITU-T G.729 and ISO/IEC MPEG4 audio. We propose two multiple description CVQ (MD-CVQ) schemes for combating channel erasure errors. MD-CVQ offers an advantage of moderate computational complexity and storage over conventional MD vector quantizers (MDVQs). Experiments are performed for both i.i.d. Gaussian source and speech/audio signals. Results show that for low channel loss rates, a tradeoff exists between choosing MD-CVQ for its low complexity and MDVQ for its higher signal-to-noise ratio (SNR) performance. For medium to high channel loss rates, MD-CVQ is preferred for its low complexity and comparable SNR performance to MDVQ","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129050371","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
Reversible Integer-to-Integer Wavelet Transforms With Improved Approximation Properties 改进近似性质的可逆整数到整数小波变换
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599742
P. van Vugt, M. Adams
{"title":"Reversible Integer-to-Integer Wavelet Transforms With Improved Approximation Properties","authors":"P. van Vugt, M. Adams","doi":"10.1109/ACSSC.2005.1599742","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599742","url":null,"abstract":"Reversible integer-to-integer (ITI) transforms that approximate linear wavelet transforms have proven extremely useful in signal coding applications. The coding efficiency achievable with such reversible transforms, however, depends on how well they approximate their parent linear transforms. In this paper, a simple but effective method for constructing reversible ITI wavelet transforms which better approximate their parent linear transforms is proposed. Furthermore, the transforms obtained with this new method are shown to have superior performance for signal coding applications","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130933947","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
On the Probability Distribution of the Outputs of the Diagonally Loaded Capon-MVDR Processor 对角加载Capon-MVDR处理器输出的概率分布
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1600063
R. Nadakuditi, A. Edelman
{"title":"On the Probability Distribution of the Outputs of the Diagonally Loaded Capon-MVDR Processor","authors":"R. Nadakuditi, A. Edelman","doi":"10.1109/ACSSC.2005.1600063","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1600063","url":null,"abstract":"The Capon-MVDR algorithm has been widely studied by several authors. The famous Capon-Goodman result on the probability distribution of the Capon-MVDR spectral estimator was also used to accurately predict the bias and variance of the Capon-MVDR algorithm due to finite sample effects. The goal of this present analysis is to extend these results to compute the probability distribution, and hence the bias and variance, of the output of the Capon-MVDR processor when the sample covariance matrix is diagonally loaded. Of particular interest is the computation, for the first time, in the snapshot deficient scenario where the diagonal loading is used to combat the ill-conditioned or rank deficient sample covariance matrix.","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123323954","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
Improvements on Accelerating Iterative Decoding Using Eigenmessages 利用特征信息加速迭代译码的改进
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599819
T. Moon, J. S. Crockett, J. Gunther
{"title":"Improvements on Accelerating Iterative Decoding Using Eigenmessages","authors":"T. Moon, J. S. Crockett, J. Gunther","doi":"10.1109/ACSSC.2005.1599819","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599819","url":null,"abstract":"The eigenmessage decoder has been shown to reduce the number of decoding iterations required for LDPC and other iteratively-decoded codes by introducing a degree of nonlocality into the decoding algorithm. In this paper, the multiple loop eigenmessage approach is extended using normalized matrices. Performance is examined via EXIT charts, showing that eigenmessage algorithms have wider channels in the chart. Performance as a function of the girth of the graph is examined, showing the performance to be largely invariant to girth. Finally, performance on matrices denser than typical \"low density\" parity check matrices is examined, showing that eigenmessage methods perform better than message passing, but still break down as the matrix density increases","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121324324","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 robust transmit CSI framework with applications in MIMO wireless precoding 一种鲁棒传输CSI框架及其在MIMO无线预编码中的应用
Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005. Pub Date : 1900-01-01 DOI: 10.1109/ACSSC.2005.1599825
M. Vu, A. Paulraj
{"title":"A robust transmit CSI framework with applications in MIMO wireless precoding","authors":"M. Vu, A. Paulraj","doi":"10.1109/ACSSC.2005.1599825","DOIUrl":"https://doi.org/10.1109/ACSSC.2005.1599825","url":null,"abstract":"Transmit channel side information (CSIT) can improve performance of MIMO wireless systems by means of precoding. More complete and reliable CSIT provides more precoding gain. Instantaneous channel measurements provide the most potential gain, but suffer from delay-induced error due to channel temporal variation. Statistical channel knowledge provides less gain, but is reliable. In this paper, we propose a framework combining a possibly outdated channel measurement with the channel statistics - the mean and the covariance - to create a dynamic CSIT form, as a function of a correlation factor between the measurement and the current channel. The CSIT consists of an estimate of the current channel and the associated estimation error covariance, which function effectively as the channel mean and covariance. We apply a precoder design exploiting these channel statistics to illustrate the achievable gain and the robustness of the new CSIT framework","PeriodicalId":326489,"journal":{"name":"Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126106968","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: 20
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