PL/M的单片机快速高精度频谱分析程序

在单片机运用系统中，常用 FFT算法对采样信息进行频谱分析，但其存在频谱系数周期性重复和混叠误差，而 FAFT算法能从根本上解决此问题，本文阐述了 PL/M语言的特点，对 FAFT进行了深入研究，给出了算法的流程图，分析了编程中的难点问题，结合单片机实时性的特点，给出了 PL/M的实用的解决方案。

In the utility system of monolithic processor,the algorithm of FFT is often used to analysis the spectrum feature of the sampling,but there exits errors of periodic resonance repetition and aliase in it, the algorithm of FAFT can resolve those problems easily.this paper studys the floaw－ process of FAFT ,pays high light on the difficulties in programming,what's more,it combines the charaterstic of real time of monolithic processor and provids practically setting scheme.