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。
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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