Effects of quantization on detrended fluctuation analysis

被引：0

作者：

朱松盛 ^{[1
,2
]}

徐泽西 ^{[3
]}

殷奎喜 ^{[1
]}

徐寅林 ^{[1
]}

机构：

[1] School of Physics Science and Technology,Nanjing Normal University

[2] Department of Biomedical Engineering,Nanjing Medical University

[3] School of Electrical and Computer Engineering,Purdue University,West Lafayette,Indiana 47907,USA

来源：

Chinese Physics B | 2011年 / 05期

关键词：

detrended fluctuation analysis; quantization;

D O I：

暂无

中图分类号：

TN911.6 [信号分析];

学科分类号：

080401 ; 080402 ;

摘要：

Detrended fluctuation analysis(DFA) is a method foro estimating the long-range power-law correlation exponent in noisy signals.It has been used successfully in many different fields,especially in the research of physiological signals.As an inherent part of these studies,quantization of continuous signals is inevitable.In addition,coarse-graining,to transfer original signals into symbol series in symbolic dynamic analysis,can also be considered as a quantization-like operation.Therefore,it is worth considering whether the quantization of signal has any effect on the result of DFA and if so,how large the effect will be.In this paper we study how the quantized degrees for three types of noise series(anti-correlated,uncorrelated and long-range power-law correlated signals) affect the results of DFA and find that their effects are completely different.The conclusion has an essential value in choosing the resolution of data acquisition instrument and in the processing of coarse-graining of signals.

引用

页码：157 / 162

页数：6

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