Signal truncation, energy leakage, and window functions



The window function is used for signal truncation, so why energy leakage occurs after signal truncation, this blog is very clear

http://blog.csdn.net/xfortius/article/details/8909486

At the same time, the following supplements some basic knowledge about Fourier transform

 

Eh, there is no way out, the pictures drawn and the words written cannot be read! !