编写DFT子函数（计算并画出幅频特性）

资 源 简 介

1)编写DFT子函数（计算并画出幅频特性），以后可调用。2）N=32，M=32，128，256时，分析频率分辨率、频谱的光滑程度。3）N=64，256，512时，分析频率分辨率和频谱的光滑程度。

详 情 说 明

The following are the revisions to make the text longer while preserving the key ideas:

1) To begin with, we can further elaborate on the DFT subfunction. The subfunction is crucial as it computes and plots the amplitude-frequency characteristic. By doing so, we can easily call it whenever necessary, making the process more convenient and efficient.

2) Another aspect we can explore is the analysis of frequency resolution and the smoothness of the spectrum, specifically when N=32, M=32, 128, and 256. We can go into greater detail on these specific values and their impact on frequency resolution and spectrum smoothness. This will provide a more in-depth understanding of the topic and allow for a more comprehensive analysis.

3) Additionally, we can analyze the frequency resolution and spectrum smoothness further in relation to N=64, 256, and 512. By exploring these values in greater detail, we can gain a more expansive perspective on the topic and provide a more thorough analysis.

Overall, these revisions will provide a more comprehensive understanding of the topic, allowing for more detailed analysis and a more in-depth exploration of the concepts presented in the original document.