针对光纤电流传感器由于环境因素的变化，从而导致传感器输出信号噪声较大的问题，提出了一个基于频域窄带加窗理论的信号处理系统。文中详细描述了频域窄带加窗算法的特性，并对其进行了Ｆｏｕｒｉｅｒ分析。该系统能实现１Ｈｚ的窄带滤波，实验中对普通光纤电流传感器的采集数据进行了窄带加窗信号处理，结果表明该系统能够有效地提高光纤电流传感器的输出信噪比。The output of optical fiber current sensor may be suffered from variation of ambient perturbations. A novel signal processing system based on the theory of windowed narrow band function is proposed in this paper for current detection. Both the function's property and analysis based on Fourier transform are discussed in details. The system can achieve 1Hz bandwidth. Results of experience show that the system can enhance the signal-to-noise ratio of OFCS efficiently
