(Solved): please comment to explain sections of the matlab code for better understanding please OBJECTIVE: In ...

OBJECTIVE: In this project, you are going to study and plot an FM modulated signal and various waveforms at the demodulator as shown below along with the corresponding magnitude spectra. SPECIFICATIONS: The message signal to be used is: $m(t)=\text{ triangl }((t?0.05)/0.05)\text{-triangl }((t?0.15)/.05)$ where the triangl. $\mathrm{m}$ function is defined in page 70 of the textbook. FM Carrier frequency $f_c=100\mathrm{Hz}$ For FFT: use $T0=1$ s, number of samples $N0=2048$ The following scheme should be assumed for FM demodulation: The rectifier blocks all negative samples and passes the positive samples. The low-pass filter (LPF) has a bandwidth equal to the bandwidth of the message signal $m(t)$. You need to choose appropriate parameters of the filter in MATLAB. TASKS: Write a MATLAB program that calculates and generates the following plots: [1] Plot-1: (a) The message signal $m(t)$ (use $\mathrm{x}$-axis limits $[0,0.25]$ ) (b) The frequency modulated signal $s(t)$ using $k_f=40$. Use the same axis limits as above. (c) The magnitude spectra of $m(t)$ and $s(t)$ [2] Plot-2: Repeat all parts of [1] from above using $k_f=60$ and explain the differences [3] Plot-3: For the frequency modulated signal $s(t)$ using $k_f=40$, plot (a) The FM derivative signal $x(t)$ and the rectified FM derivative signal $y(t)$ (b) The demodulated signal $m_d(t)$ and the magnitude spectrum of $m_d(t)$ [4] Plot-4: Repeat part [3] above using $k_f=60$ and explain the differences.