I need the MATLAB code for this. please provide comments on functions.

If any additional information is needed, please specify what is needed and I will do my best to add information. But all information I have is in the post.

3A. General Background. Now that you have learned how to find Fourier transforms of simple time signals either by direct integration analytical or numerical) or by using trans- form theorems, it's time to let computer find transforms for you. For this purpose we we an algorithm (an efficient procedure to calculate) called FFT. To use FFT we must first discretise our time signal z(t), i.e., generate a sampled signal (n) = (t = n.), where T, is the sampling period. The sampling frequency f. -1/T, There are several factors that must be considered: a) Sampling period T, must be smaller than 1/2f... where for is the largest frequency in the signal spectra Equivalently, the sampling frequency f. = 1/T, > 2. This requires that you must have some idea of the spectral bandwidth of (t). For example, the RF pulse of computer exercise 3 (with fe = 10 Hz and pulse width of 1 second), we note that most of significant X(f) is restricted to less than 20 Hz. Thus you can choose fmax 20 Hz. That gives you T, 2. This requires that you must have some idea of the spectral bandwidth of (t). For example, the RF pulse of computer exercise 3 (with fe = 10 Hz and pulse width of 1 second), we note that most of significant X(f) is restricted to less than 20 Hz. Thus you can choose fmax 20 Hz. That gives you T,