An AM modulator operates with the message signal m(t) 9 cos (20t) 8 cos (60t) The unmodulated carrier is given by 110 cos(200t) and the system operates with an index of 0 8 (a) Write the equation for m n (t), the normalized signal with a minimum value of 1 (b) Determine m 2 n (t) , the power in m n...

a With mt 9 cos20t 8 cos60t we can use MATLAB and either plot the waveform or use a root finding alg ...

An AM modulator operates with the message signal m(t) = 9 cos (20t) - 8 cos (60t)

Question:

An AM modulator operates with the message signal

m(t) = 9 cos (20πt) - 8 cos (60πt)

The unmodulated carrier is given by 110 cos(200πt) and the system operates with an index of 0.8.

(a) Write the equation for m_n(t), the normalized signal with a minimum value of -1.

(b) Determine {m²_n(t)}, the power in m_n(t).

(d) Sketch the double-sided spectrum of x_c(t), the modulator output, giving the weights and frequencies of all components.

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Principles of Communications Systems, Modulation and Noise

ISBN: 978-8126556793

7th edition

Authors: Rodger E. Ziemer, William H. Tranter

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Question Posted: Sep 14, 2018 11:37 AM

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An AM modulator operates with the message signal m(t) = 9 cos (20t) - 8 cos (60t)

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a With mt 9 cos20t 8 cos60t we can use MATLAB and either plot the waveform or use a root finding alg...View the full answer

Principles of Communications Systems, Modulation and Noise

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