Communication Systems - Modulation

Consider a real, narrowband signal $x(t) = A(t)\cos[2\pi f_c t + \theta(t)]$ where the maximum frequency components of $A(t)$ and $\theta(t)$ are $f_M$ and $f_c (= 1000 f_M)$, respectively. Which of the following stateme...

The baseband signal m(t) shown in the figure is phase-modulated to generate the PM signal $\varphi(t) = \cos(2\pi f_c t + k m(t))$. The time t on the x-axis in the figure is in milliseconds. If the carrier frequency is $...