基于FFTW算法的M-Z周界防护系统  

FFTW algorithm-based Mach-Zehnder perimeter protection systems

作　　者：廖俊[1,2] 张志勇[1,2] 邵理阳[1,2] 闫连山[1,2] 王鹏翔[1,2] 喻劼 

机构地区：[1]西南交通大学信息光子与通信研究中心,成都610031 [2]西南交通大学铁路发展有限公司,成都610031

出　　处：《光通信研究》2015年第4期37-38,75,共3页Study on Optical Communications

基　　金：铁路总公司重大课题(2013T002-A-2);教育部重大项目(313049)

摘　　要：采用FFTW(西方快速傅里叶变换)算法实现了两路接收信号的快速互相关计算,提高了M-Z(马赫-曾德)周界防护系统定位的实时性。搭建了M-Z周界防护实验装置,在6km光缆上进行了振动信号定位测试。在20 MHz采样率条件下实现了21m的定位精度,定位计算时间小于0.5s。实验结果表明,此算法与传统FFT(快速傅里叶变换)算法相比,计算速度显著提高。Fast cross-correlation calculation of the signals received in two channels are realized by using the Fastest Fourier Transform in the West (FFTW)algorithm,real-time location of the Mach-Zehnder (M-Z)perimeter protection systems im-proved,M-Z perimeter protection equipment set up and vibration signal location tests performed in a 6 km-long cable with an accuracy of 21 m at a sampling rate of 20 MHz with the location calculated in less than 0.5 s.The experimental results indicate that compared with the conventional Fast Fourier Transformer (FFT)algorithm,this algorithm calculates significantly faster.

关 键 词：西方快速傅里叶变换 周界防护 马赫-曾德 互相关算法 

分 类 号：TP915[自动化与计算机技术]