谱线辨识是数字信号处理的一个重要课题，利用完全对称窗的实谱特性可以判定分立谱线的存在；相继两次ＤＦＴ分析（实为一次复时域信号分析）可精确求出诸分立谱线的频率、幅度与相位。本文提出的分立谱线辨识方法普遍用于各种周期性时域信号的精密谱分析工作。

The identification of spectral lines is an important topic of DSP(Digital Signal Processing).The occurrence of discrete spectral lines can be decided by means of real spectral characteristic of complete symmetrical window. The frequency, amplitude and phase of discrete spectral lines can be calculated through two DFT analyses one after another, which are one complex time domain signal analysis virtually. The method of discrete spectral line identification presented in this paper applies to the precise spectral analysis of all kinds of periodic time domain signals.

TN911.72