光纤振动信号的二维二级检测算法

在光纤振动信号检测系统中，使用相位敏感光时域反射技术，可检测长距离的光纤振动信号，但反射回的光信号都有大量的振动杂波和噪声，导致振动检测信号的虚警率较高。提出采用单元平均恒虚警(CA-CFAR)和有序统计恒虚警(OS-CFAR)二级检测算法，保持虚警率稳定，既提高了运算速度，也改善了参考单元中存在多个目标的检测性能，并提出利用蒙特卡罗方法确定二级检测的门限系数，最后通过蒙特卡罗仿真及现场实验验证，对算法进行了性能分析，验证了算法的可行性以及有效性。

Abstract

In the detection system, the long distance optical fiber vibration can be detected by phase-sensitive optical time domain reflect technique. However, the reflected signals include clutters and noises, which leads to a high false alarm rate. A two- level detection algorithm, which can maintain constant false alarm rate, is proposed, including cell average constant false alarm rate (CA- CFAR) and ordered statistics constant false alarm rate (OS- CFAR) which work in serial ways, and the detection speed of CA- CFAR and the performance of OS-CFAR are conserved, respectively. Monte Carlo simulation is applied to determine the threshold of twolevel detection. Finally, Monte Carlo simulation and the experiment on the scene are applied to analyze the performance of the algorithm, which proves the feasibility and effectiveness.

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曲洪权, 任学丛, 毕福昆, 刘大年, 张常年. 光纤振动信号的二维二级检测算法[J]. 光学学报, 2015, 35(10): 1006004. Qu Hongquan, Ren Xuecong, Bi Fukun, Liu Danian, Zhang Changnian. Two-Level Detection Algorithm of Two-Dimensional for Vibration Signals Detected by Optical Fiber[J]. Acta Optica Sinica, 2015, 35(10): 1006004.

光纤振动信号的二维二级检测算法

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