数字化多道中双指数脉冲梯形成形算法研究

摘要

Based on the principle of double exponential pulse trapezoidal shaping algorithm, the filter characteristics and ballistic deficit characteristics of the algorithm are analyzed theoretically. The experimental results by MATLAB simulation and the digital multichannel pulse analyzer based on FPGA show that the longer the trapezoidal rising edge is,the better the filtering effect is,and when repairing the ballistic deficit,the trapezoidal flattening length is less than the detector charge collection time. In the design of digital multichannel pulse analyzer,the adjustment of the trapezoidal parameters on the basis of the above characteristics can be optimize,so as to minimize the system trapezoidal shaping time,reduce the pile-up pulse probability,improve the multichannel pulse analysis system pulse pass rate.%本文在双指数脉冲梯形滤波成形算法原理基础上,从理论上分析了算法的滤波特性和弹道亏损特性.通过MATLAB仿真和基于FPGA的实验验证,证明了该算法的梯形上升沿时间越长滤波效果越好,修复弹道亏损所需梯形平顶长度小于探测器电荷收集时间.在设计数字化多道时可根据上述特性对梯形参数进行优化调整,从而最大限度地减少系统脉冲成形时间,降低脉冲堆积概率,提高多道脉冲幅度分析系统的脉冲通过率.