中文说明： 上传的Matlab代码是在GUI界面下运行的，如果只需要在原始命令窗口下运行，可以选取GUI代码中的部分代码也可直接运行。内容是关于通信领域的滤波器，而且为高通、低通、带通、带阻滤波器仿真代码，所传代码可以经过本人操作，只要把代码贴在软件中，即可直接得出结果，保证没有报错问题，可放心使用。
English Description：
The uploaded matlab code is run in GUI interface. If you only need to run in the original command window, you can select part of the GUI code or run it directly. The content is about the filter in the field of communication, and it is the simulation code of high pass, low pass, band pass and band stop filter. The code can be operated by myself. As long as the code is pasted in the software, the result can be obtained directly, so as to ensure that there is no error problem, and it can be used safely.