梯形成形算法中成形参数与成形脉冲波形关系研究

Study on the Relationship Between the Shaping Parameters of Trapezoidal Pulse Shaping Algorithm and the Trapezoidal Pulse Shape

在梯形成形算法理论基础上,利用模拟和实测核脉冲信号研究了梯形成形算法中衰减时间常数(τ_(trap))、达峰时间(n_a)与成形脉冲波形、滤波效果的关系,以及nb在分离堆积脉冲时的取值选择。研究表明,当且仅当τ_(trap)等于输入信号衰减时间常数时,成形脉冲对称;n_a值越大,滤波效果越好,脉冲宽度增加;n_b小于两个核脉冲信号发生的时间间隔时,采用梯形成形算法可分离堆积脉冲。

By using the simulated nuclear pulse signals and the measured ones,the relationship between the decay time constant of the algorithm（τ_（trap）） and the trapezoidal pulse shape was studied,and the peaking time of the trapezoidal pulse（n_a） was discussed with the filtering performance. Also,the law of n_b selection was produced for pile-up pulse separation. The results suggest that only the shaping parameter τ_（trap） equals to the decay time constant of input signal can the shaped pulse be symmetry. Besides,the filtering performs better as n_a increases and the pile-up pulse can be separated as long as the trapezoidal pulse width is less that the interval time of the two nuclear pulse signals.