Improvement of Wavelet Based Parameter Estimations of Nearly 1/f Processes(Digital Signal Processing)
スポンサーリンク
概要
- 論文の詳細を見る
Nearly 1/f processes are known as important stochastic models for scale invariant data analysis in a number of fields. In this paper, two parameter estimation methods of nearly 1/f processes based on wavelets are proposed. The conventional method based on wavelet transform with EM algorithm does not give the reliable parameter estimation value when the data length is short. Moreover, the precise parameter value is not estimated when the spectrum gap exists in 1/f processes. First, in order to improve the accuracy of the estimation when the data length is short, a parameter estimation method based on wavelet transform with complementary sampling is proposed. Next, in order to reduce the effect of spectrum gap, a parameter estimation method based on wavelet packet with EM algorithm is proposed. Simulation results are given to verify the effectiveness of the proposed methods.
- 社団法人電子情報通信学会の論文
- 2004-02-01
著者
-
WADA SHIGEO
Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University
-
Wada Shigeo
Department Of Electrical Engineering Tokyo Denki University
-
Wada Shigeo
Department Of Bioengineering And Robotics Graduate School Of Engineering Tohoku University
-
ITO Nao
Department of Electrical Engineering, Tokyo Denki University
-
Ito Nao
Department Of Electrical Engineering Tokyo Denki University
関連論文
- Computational Flow Dynamics in Abdominal Aortic Aneurysm Using Multislice Computed Tomography
- A Rule-Based Computational Study on the Early Progression of Intracranial Aneurysms Using Fluid-Structure Interaction: Comparison between Straight Model and Curved Model
- Simulation Study on Effects of Hematocrit on Blood Flow Properties Using Particle Method
- Quantitative Measurements on the Human Ascending Aortic Flow Using 2D Cine Phase-Contrast Magnetic Resonance Imaging(Bioengineering)
- Frame Operator Approach for Designing Discrete-Time Multiple Short-Time Fourier Transform and Its Time-Frequency Distribution (Special Section on Signal Processing for Nonstationary Processes Based on Modelling)
- Improvement of Wavelet Based Parameter Estimations of Nearly 1/f Processes(Digital Signal Processing)
- Growth of Intracranial Aneurysms Arised from Curved Vessels under the Influence of Elevated Wall Shear Stress : A Computer Simulation Study(Bioengineering)
- A Particle Method Computer Simulation of the Blood Flow(Micro- and Nano-biomechanics)
- A Computer Simulation on the Growth of Intracranial Aneurysms Arising From a Straight Artery(Cardiovascular flow Simulation)
- Effects of the Initial Orientation of Actin Fibers on Global Tensile Properties of Cells
- Automated Segmentation and Morphometric Analysis of the Human Airway Tree from Multidetector CT Images
- Eukaryotic Translation Elongation Factor (eEF1A) Serves as a Membrane Receptor Mediating Anti-Adhesive Effect of Peptide FNIII14