The transmitted signal Xt = Accos(2πfct+φ),

I know mathematical expression of complex envelope and its derivation,

  but how to find its complex envelope in MATLAB?

Assume that Ac = 3,carrier frequency fc = 1GHz,phase φ = 30 degrees.

Could somebody show me the MATLAB code that generates the complex envelope of signal Xt?

The transmitted signal $$x(t) = A_c \cos(2\pi f_c t+\phi),$$

I know mathematical expression of complex envelope and its derivation, but how to find its complex envelope in MATLAB?

Assume that $A_c = 3$, carrier frequency $f_c = 1$ GHz, phase $\phi = 30$ degrees.

Could somebody show me the MATLAB code that generates the complex envelope of signal $x(t)$?