自适应噪声抑制器的设计和Simulink验证  

Design of an adaptive noise suppressor and its verification on Simulink

作　　者：雷文英[1] 党瑞荣[1] 牟明洋 戴乾军 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065 [2]中国石油集团测井有限公司长庆事业部,陕西高陵710020 [3]中国石油集团测井有限公司吐哈事业部,新疆鄯善838202

出　　处：《电子测试》2010年第8期70-76,共7页Electronic Test

摘　　要：在测井信号的处理中,经常会遇到非平稳噪声环境下的信号检测问题,此时很难用经典的滤波器系数固定的FIR滤波器或IIR滤波器来解决噪声背景下的信号提取问题。本文首先介绍了一种系数可变的FIR滤波器实现一种不需要参考噪声的自适应噪声抑制器的基本原理,然后在此基础上阐述了在Simulink环境中建模的具体方法,最后使用该模型对一个非平稳有色噪声信号进行抑制,仿真结果表明在不需要参考噪声源时通过该自适应噪声抑制器同样可以获得比较好的噪声抑制效果。It is common to face such problem that classic fixed coefficients FIR/IIR filters can not extract useful signals effectively in a non-stationary noise environment during the well logging signal processing.To solve the problem,this paper presents a design of a variable coefficients adaptive FIR filter not employing reference noise signal firstly.Then the detailed modeling process based on that design is given in Simulink.At last,a specific noise suppression simulation on a noisy signal contaminated by a non-stationary color noise is conducted and the simulation result have manifested that the design of the adaptive noise suppressor is feasible and effective,in cases where there is no reference noise source.

关 键 词：自适应滤波 非平稳 噪声抑制 SIMULINK 

分 类 号：TN713[电子电信—电路与系统]