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）。
The algorithm of discrete system coupling matrix is analyzed comprehensively, and some useful results are obtained by the use of spectrum interpolation method.
较全面分析了藕联离散系统矩阵的计算方法，并利用频谱插值计算法，得出了几个较有意义的应用结果。
A robust correcting method for discrete spectrum in CW radar velocity measuring is proposed in this paper, t is named the method of triangle.
该文提出了一种适用于连续波雷达测速的、稳健的离散频谱校正方法，即三角形法。
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