Problem .3 1. In the figure, a message signal is multiplied by a cosine signal x₁(t) to obtain the signal y (t). and y,

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Problem 3 1 In The Figure A Message Signal Is Multiplied By A Cosine Signal X T To Obtain The Signal Y T And Y 1 (70.95 KiB) Viewed 17 times

Problem .3 1. In the figure, a message signal is multiplied by a cosine signal x₁(t) to obtain the signal y (t). and y, (t) is passed through an ideal low-pass filter with cutoff frequency 10KHz to produce w(t). Then w(t) is multiplied by a cosine signal x₂(t) and the resulting signal y(t) is passed through an ideal low-pass filter with cutoff frequency 10KHz to obtain the output signal z(t). m(t). y(t) LPF at 20KHz. w(t) y₂ (1) M(f) s. 4 -4 LPF at 20 KHz. x₁ (t) = cos(2π20000+) x₂ (t) = 2 cos (2π20000t) a. If the message signal is m(t) = 4cos(272000f)+2 cos(274000f), find and sketch (ƒ), W(f), ₂(f), and Z(f). b. If the message signal spectrum M(f) is given as following, sketch Y₁(f), W (f), Y₂(f), and Z(f). z(t) f(KHz)