Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252)最新文献

A simple encodable/decodable OFDM QPSK code with low peak-to-mean envelope power ratio 一个简单的可编码/可解码的OFDM QPSK码，具有低峰值-平均包络功率比

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-11-01 DOI: 10.1109/ISIT.2001.936178

C. Chong, V. Tarokh

引用次数: 34

The effect of redundancy on measurement 冗余对测量的影响

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-11-01 DOI: 10.1109/ISIT.2001.935953

O. Collins, N. Vasudev

{"title":"The effect of redundancy on measurement","authors":"O. Collins, N. Vasudev","doi":"10.1109/ISIT.2001.935953","DOIUrl":"https://doi.org/10.1109/ISIT.2001.935953","url":null,"abstract":"The parameters of a mechanical or electrical system are usually determined by making as many measurements as there are degrees of freedom. This article demonstrates that increasing the number of measurements made on a system beyond this minimum can reduce the effect of measurement errors. The possible systems to which this technique may be applied are too diverse to be captured by a simple and compact analytical formulation. Thus, we discuss techniques for three different measurement models: scalar difference measurements, complex product measurements, and scalar additive measurements. All have both a compact mathematical formalization and wide practical applicability. A simple example of a measurement problem discussed is the generation of a binary ruler using a compass and a straight edge. Error is introduced whenever the mid-point of a line is found. The straight-forward approach to the ruler's construction is iterative bisection of the distance between two adjacent points till the required resolution is obtained. The maximum error introduced using this procedure scales logarithmically with the number of points. The accuracy may be improved by bisecting the distance from one of the end points to an already obtained point iteratively. Using this technique the error of any constructed point can be bounded by a constant, i.e., it does not scale with the number of points. We show, for three broad classes of measurements, that, as the measurement redundancy increases, the residual error falls to a small constant value. The overall effect is analogous to the improvements in communications reliability demonstrated by the coding theorem. Only scalar difference measurements are considered.","PeriodicalId":433761,"journal":{"name":"Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124699187","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

Identifiability of harmonic parameterization in N dimensions N维谐波参数化的可辨识性

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.936049

N. Sidiropoulos

引用次数: 0

On the Poor-Verdu conjecture for the reliability function of channels with memory 带存储器信道可靠性函数的穷verdu猜想

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.935987

F. Alajaji, Po-Ning Chen, Z. Rached

引用次数: 0

A Schur-saddle function property in CDMA CDMA中的schur -鞍函数性质

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.935991

P. Viswanath, V. Anantharam

引用次数: 1

A new modulation scheme using asymmetric error correcting code embedded in optical orthogonal code for optical CDMA 提出了一种在光正交码中嵌入非对称纠错码的光CDMA调制方案

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.936137

K. Kamakura, I. Sasase

{"title":"A new modulation scheme using asymmetric error correcting code embedded in optical orthogonal code for optical CDMA","authors":"K. Kamakura, I. Sasase","doi":"10.1109/ISIT.2001.936137","DOIUrl":"https://doi.org/10.1109/ISIT.2001.936137","url":null,"abstract":"Conventionally, optical CDMA systems with on-off keying (OOK) require a time duration equalling a signature sequence length to transmit only one bit. Since the crosscorrelation between the signature sequences results in multi-access interference (MAI), the signature sequences are designed so that their weight distribution is sparse for their long length, and then MAI rarely occurs. With this view, optical orthogonal codes (OOC) are investigated, which are characterized by a quadruple (L,W,/spl lambda//sub a/,/spl lambda//sub c/), where L and W are length and weight of sequences, respectively, and /spl lambda//sub a/, and /spl lambda//sub c/, are maximum off-peak autocorrelation and maximum crosscorrelation, respectively. Thus, the use of OOC makes the effect of MAI small, but has to spend a long duration for one bit. In this paper, we propose an embedded modulation scheme, where an asymmetric error correcting (AEC) code is embedded in an OOC used for identification in optical CDMA. We show that the proposed scheme achieves the same bit error rate (BER) as conventional systems, with less average number of photons.","PeriodicalId":433761,"journal":{"name":"Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115489989","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: 18

Vector MAC capacity region with covariance feedback 带协方差反馈的矢量MAC容量区域

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.935917

S. Jafar, S. Vishwanath, A. Goldsmith

引用次数: 30

Matrix CUSUM: a recursive multi-hypothesis change detection algorithm 矩阵CUSUM:一种递归多假设变化检测算法

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.935882

T. Oskiper, H. V. Poor

引用次数: 2

A blind delay estimation algorithm for long-code DS/CDMA systems 一种用于长码DS/CDMA系统的盲延迟估计算法

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.936036

S. Buzzi, M. Lops, H. Poor

引用次数: 2

Unified duality between channel capacity and rate distortion with state information 信道容量和速率失真与状态信息的统一对偶性

Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252) Pub Date : 2001-09-12 DOI: 10.1109/ISIT.2001.936164

M. Chiang, T. Cover

引用次数: 26