摘要
通过对基于最小均方(LMS)误差的自适应滤波算法进行研究和分析,分析了步长因子和滤波器阶数对滤波效果的影响。利用System Generator软件设计了适用于光纤水听器阵列信号的噪声消除LMS自适应滤波器,其无需加入额外参考探头,利用光纤传感器阵列中某一单元的相邻单元信号为参考信号,实现了该单元信号的降噪处理。试验结果表明,该自适应滤波器能够有效地降低噪声水平,对光纤传感信号的降噪处理有较高的应用价值。
The influence of the step-size and the filter order on the filtering effect is analyzed by analyzing the adaptive filtering algorithm based on the least mean square（LMS）error.Using the System Generator software,a LMS adaptive filter for the optical fiber hydrophone noise-reduction is designed.The filter doesn＇t need additional reference sensors and uses the signal in adjacent unit of one unit of the optical fiber sensor array as the reference signal,to realize the unit noise-reduction.The filter could effectively reduce noise level showed by experiments,so it has high application value in the optical fiber sensor signal noise-reduction.
出处
《光纤与电缆及其应用技术》
2016年第3期34-38,共5页
Optical Fiber & Electric Cable and Their Applications
基金
上海市科学技术委员会资助项目(13dz1204500)
