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ELE324hw3a

# ELE324hw3a - its magnitude spectrum iv Obtain x1(n = s(n...

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Due ?, 200? ELE 324 - TELECOM I HW 3 We study Quadrature Amplitude Modulation in this homework. i) Generate carrier waves c1(n) and c2(n) with (normalized) frequency fc=0.25 : c1(n) = cos(2 π fc n) and c2(n) = sin(2 π fc n) for n=1,2,…,256. Plot c1(n),c2(n) and their magnitude spectrum (use abs and dft or fft commands). ii) Generate modulating tone signals with frequency fm=0.01 : m1(n) = cos(2 π fm n) and m2(n) = sin(2 π fm n).Plot m1(n), m2(n) and their magnitude spectrum. iii) Obtain the modulated signal s(n) = m1(n) c1(n) + m2(n) c2(n). Plot s(n) and
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Unformatted text preview: its magnitude spectrum. iv) Obtain x1(n) = s(n) c1(n) and x2(n) = s(n) c2(n). Plot their magnitude spectrum. v) Desing a LowPass Filter using Matlab’s fir1 with N=8 and W=0.3. Plot the filters magnitude response. vi) Using conv command lowpass filter x1(n) and x2(n) to obtain v1(n) and v2(n). Plot v1(n), v2(n) and their spectrum. Compare with m1(n) and m2(n). vii) Repeat iv),v),vi) with c2(n) = sin(2 π fc n), fc=0.27 for x2(n) and v2(n). viii) Comment on the results....
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