Gaussian-like forming method

Abstract

The invention discloses a Gaussian-like forming method, which is used for carrying out Gaussian-like forming filtering convolution processing on an input signal, comprises two times of convolution processing, and comprises the following steps: S1, carrying out first convolution processing on an input signal to realize bipolar forming; and S2, carrying out second convolution processing on the signal obtained in the step S1 to realize Gaussian-like forming. The method has the advantages of Gaussian forming and bipolar forming at the same time, has good anti-noise capacity while achieving high-resolution energy spectrum, and has baseline drift resisting capacity compared with a common digital forming method. Due to the fact that the method is fully digital, parameters of digital Gaussian shaping are easy to adjust compared with analog Gaussian shaping, and compared with a digital S-K filter, trailing of pulses is removed, the symmetry is better, the pulse is narrower, and the digital Gaussian shaping is suitable for energy spectrum measurement at a high counting rate. In order to improve the filtering effect, the digital Gaussian shaping method can be repeatedly used twice to achieve a better effect.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a Gaussian-like shaping method. Background technique [0002] Nuclear energy spectroscopy is one of the important methods for radioactivity measurement and material composition analysis. In the nuclear energy spectrum measurement system, the nuclear pulse signal output by the nuclear radiation detector rises quickly, but falls for a long time, which not only affects the energy resolution, but also affects the peak position of the energy spectrum curve. A common approach to this problem is to shape the nuclear pulse signal. Gaussian shaping has better comprehensive performance in terms of high energy resolution and ballistic loss, so Gaussian shaping is a main research direction of nuclear pulse shaping. The analog Gaussian shaping system is often implemented using an analog S-K filter, but on the one hand, the analog system has many deficiencies in stabili...

Images