一种中子脉冲序列信号实时频谱分析的研究

摘要

中子脉冲序列频谱分析是一种极为重要的核信息随机信号分析方法.论文针对中子脉冲序列信号本身所具有特殊的"0、1"结构特点,构造了旋转因子表,通过加法和寻址运算及SSE优化指令,实现了在1GHz采样率下基于PC平台的中子脉冲序列信号的FFT实时频谱分析.性能测试及仿真验算结果表明,在中子计数率为3×106 s-1时,该算法所需的计算时间较相应的FFTW提高了355.3%,满足了中子脉冲序列信号频谱分析的实时性要求,且还具有可扩展性强、维护方便等优点.%The frequency spectrum analysis of neutron pulse signal is a very important method in nuclear stochastic signal processing Focused on the special "0" and "1" of neutron pulse signal series, this paper proposes new rotation-table and realizes a real-time frequency spectrum algorithm under 1G Hz sample rate based on PC with add, address and SSE. The numerical experimental results show that under the count rate of 3×106 s-1, this algorithm is superior to FFTW in time-consumption and can meet the real-time requirement of frequency spectrum analysis.