离散稳恒信号的多重分形谱的计算及其应用  

Computation and Applications of Multi-fractal to Discrete Stationary Signals

作　　者：陈双平[1] 郑浩然[2] 刘金霞[2] 童庆[2] 王煦法[2] 

机构地区：[1]中国科学技术大学电子工程与信息系统系,合肥230027 [2]中国科学技术大学计算机科学与技术系,合肥230027

出　　处：《电子与信息学报》2007年第5期1054-1057,共4页Journal of Electronics & Information Technology

基　　金：中国科学院知识创新工程重要方向基金项目(KSCX2-SW-329);中国科学技术大学高水平大学建设重点项目资助课题

摘　　要：对于未知信号而言,一般将其视为稳恒信源的输出。因而,利用统计的方法计算信源输出信号的多重分形谱,与理论上计算的结果加以比较,据此就可以判断信源模型参数估计的合理性。该文给出了计算信号多重分形谱的一般方法,并且探讨了计算过程中的相关问题。并将该方法应用于染色体中碱基序列的分析中,实验结果表明,在某种程度上,碱基序列可视为某个离散稳恒信源的输出。。Unknown signals are always be treated as outputs of stationary information sources which are easy to be dealt with. So, it is possible to compute multi-fractal spectrum of the signals, which are compared with theoretical results to verify whether the estimation of parameters for a model is correct or not. This paper, describes how to compute the multi-fractal spectrum and other problems concerning the methods. Applying the methods to the analysis of DNA sequences shows that, in a sense, genomic sequence can be viewed as outputs of a stationary information source.

关 键 词：离散稳恒信源 多重分形谱 脱氧核糖核酸(DNA)序列 统计分析 

分 类 号：TN911.7[电子电信—通信与信息系统]