分数阶域最优滤波算法

随着社会发展,对于语音信号的增强愈显重要,本文通过对传统傅里叶变换与分数阶傅里叶变换对比研究,充分体现分数阶域的时频分析特性的优越性。并使用一段语音在以均方误差准则下,选取最佳变换阶次,并进行该阶次下的分数阶傅里叶变换。通过MATLAB仿真证明,在关于变换阶次的局部区间内存在着某最佳变换阶次,其增强效果明显优于传统谱减...

Algorithm of an optimal filter based on fractional domain

With the development of society, the greater importance can be see for the enhancement of speech signal , This article will use traditional speech enhancement algorithm into fractional domain, and contrast with Traditional Fourier transform, Fully embody the advantages and characteristicsthe of time and frequency domain analysis,Through the use of a voice,Based on the minimum mean square error rule,Select the best transform order times,and proceed the fractional Fourier transformation.Through the simulation of matlab is that, in The Times about transform order local interval exist a best transform order times, the enhancement effect was better than traditional the spectral subtraction effects, and can greatly improve the performance of the speech signal, voice has better clarity and the intelligibility.to prove the feasibility of the algorithm.