首页> 外文期刊>Statistical Methods and Applications >On wavelet analysis of the nth order fractional Brownian motion
【24h】

On wavelet analysis of the nth order fractional Brownian motion

机译:关于n阶分数布朗运动的小波分析

获取原文
获取原文并翻译 | 示例
       

摘要

In this paper, we investigate the use of wavelet techniques in the study of the nth order fractional Brownian motion (n-fBm). First, we exploit the continuous wavelet transform's capabilities in derivative calculation to construct a two-step estimator of the scaling exponent of the n-fBm process. We show, via simulation, that the proposed method improves the estimation performance of the n-fBm signals contaminated by large-scale noise. Second, we analyze the statistical properties of the n-fBm process in the time-scale plan. We demonstrate that, for a convenient choice of the wavelet basis, the discrete wavelet detail coefficients of the n-fBm process are stationary at each resolution level whereas their variance exhibits a power-law behavior. Using the latter property, we discuss a weighted least squares regression based-estimator for this class of stochastic process. Experiments carried out on simulated and real-world datasets prove the relevance of the proposed method.
机译:在本文中,我们研究了小波技术在研究n阶分数布朗运动(n-fBm)中的用途。首先,我们在导数计算中利用连续小波变换的功能,以构造n-fBm过程的缩放指数的两步估计器。我们通过仿真显示,该方法提高了被大范围噪声污染的n-fBm信号的估计性能。其次,我们在时间尺度计划中分析了n-fBm过程的统计特性。我们证明,为了方便选择小波,n-fBm过程的离散小波细节系数在每个分辨率级别上都是固定的,而它们的方差表现出幂律行为。利用后者的属性,我们讨论了此类随机过程的基于加权最小二乘回归的估计量。在模拟和真实数据集上进行的实验证明了该方法的相关性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号