智能测试仪器中信号采样与频谱计算问题研究

Study of Signal Sampling and Spcetrum Calculations Used in Intelligent Instruments

对智能测试仪器中 FFT的一些优化实现方法进行了讨论 ,包括一种整型 FFT的实现方法及其 PL/ M语言程序、等效频域加窗、四分之一三角函数固化表、实序列 FFT的特殊处理等。还针对两种特殊情况 。

Some efficient implementations for the FFT algorithm used in intelligent instruments are studied.They include FFT algorithm for integer variables and an implementation with the PL/M language,equivalent windowing in frequency domain,one fourth period trigonometric function table stored in EPROM,and an efficient FFT algorithm for real data.At last,the over and down samplings are also discussed briefly.