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本文主要对正弦序列的离散傅里叶变换(DFT)进行了分析,研究了不同的截取长度对其DFT的频谱泄露的影响,并在此基础上成功提取了含噪声信号的主频信息。
In this paper, we mainly analyze the discrete Fourier transform (DFT) of sinusoidal sequences and study the influence of different cut lengths on the spectral leakage of their DFTs. Based on this, the dominant frequency information of noise signals is successfully extracted.