The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.
数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。
In this paper, the disadvantages of standard arithmetic are pointed out, and a new method is given to improve inverse order for FFT with high efficiency, the standard arithmetic is also optimized.
文中指出了这个算法的缺陷，提出了改进方法，明显地提高了整序效率，使FFT标准整序算法得到优化。
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