In the equation x(t) = Re ([x_l (t) e^{j2 F_c t}] ), What is the lowpa – McqOptions

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1.	In the equation x(t) = R_e ([x_l (t) e^{j2 F_c t}] ), What is the lowpass signal x_l (t) is usually called the ___ of the real signal x(t).
A.	Mediature envelope
B.	Complex envelope
C.	Equivalent envelope
D.	All of the mentioned
Answer» C. Equivalent envelope

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