基于 IIR 滤波器的核信号数字高斯成形方法

摘要

In order to meet the development trend of digital nuclear instruments, this paper studies a method of digital gaussian shaper.The digital gaussian filter index can be determined according to the frequency response of analog gaussian shaping circuits, then the IIR digital gaussian filter is designed.The experimental results with the actual sampling signal show that the digital nuclear pulse has been shaped into a pseudo-gaussian pulse when it goes through the digital gaussian filter, at the same time, noises have been removed.This method can not only replace the complex analog gaussian filter, but also can improve stability and anti-interference of the system.%为适应数字化核仪器发展的趋势，研究了一种数字高斯滤波成形的方法。根据模拟高斯成形电路的频率响应，确定数字高斯成形滤波器的指标，设计了IIR数字高斯成形滤波器。对实测核脉冲信号进行处理的结果显示，在滤除噪声的同时，可以将数字核脉冲信号成形为准高斯信号。该方法不仅可代替复杂的模拟滤波成形电路，而且能提高系统稳定性和抗干扰性。