Question 3 An analog signal contains frequencies up to 10 kHz. (a) What range of sampling frequen...

Question 3 An analog signal contains frequencies up to 10 kHz. (a) What range of sampling frequencies allows exact reconstruction of this signal from its samples? (b) Suppose that we sample this signal with a sampling frequency F, = 8 kHz. Examine what happens to the frequency F1 = 5 kHz. (e) Repeat part (b) for a frequency F2 = 9 kHz. Question 4 A digital communication link carries binary-coded words representing samples of an input signal Xa(t) = 3 cos 600x + + 2 cos 1800 t The link is operated at 10,000 bits/s and each input sample is quantized into 1024 different voltage levels. (a) What are the sampling frequency and the folding frequency? (b) What is the Nyquist rate for the signal Xa(!)? (e) What are the frequencies in the resulting discrete-time signal x(n)? (d) What is the resolution A?