Solucionario Sistemas De Comunicaciones Electronicas 4ta Edicion Wayne Tomasi34 Direct

Solution:

Coherent digital modulation uses a reference carrier signal at the receiver to detect the transmitted signal, while noncoherent digital modulation does not use a reference carrier signal.

Solution:

where k_f is the frequency deviation constant and A_m is the amplitude of the modulating signal.

F(ω) = A * τ * sinc(ωτ/2)

S(f) = lim (T → ∞) [1/T * E^2]