基于FFTW算法的MZ周界防护系统
FFTW algorithmbased MachZehnder perimeter protection systems
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MZ(马赫-曾德)周界防护系统定位的实时性。搭建了MZ周界防护实验装置,在6 km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21 m的定位精度,定位计算时间小于0.5 s。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。
Abstract
Fast crosscorrelation calculation of the signals received in two channels are realized by using the Fastest Fourier Transform in the West (FFTW) algorithm, realtime location of the MachZehnder (MZ) perimeter protection systems improved, MZ perimeter protection equipment set up and vibration signal location tests performed in a 6 kmlong 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.
廖俊, 张志勇, 邵理阳, 闫连山, 王鹏翔, 喻劼. 基于FFTW算法的MZ周界防护系统[J]. 光通信研究, 2015, 41(4): 37. Liao Jun, Zhang Zhiyong, Shao Liyang, Yan Lianshan, Wang Pengxiang, Yu Jie. FFTW algorithmbased MachZehnder perimeter protection systems[J]. Study On Optical Communications, 2015, 41(4): 37.