Question

14. The frequency-division multiplexing system shown below combines two messages for transmission across a shared channel. a) sketch the spectrum at point b for the case f 13000 Hz b) find the minimum value of fi that avoids interference between the messages c) What is the bandwidth required from the lowpass channel, for the value of f found in 2cos(8000T) m,(0) 44.00 m (r) 2cos(2n f t)

Answer 1

Given f_2 = 13000 H_2 minimum value of f_2 to avoid interface. (f_2 - 4) greaterthanorequalto 7 f_2 = 11 k H z so, min value is 11 K H z for no interference. Band width of low pass channel = 11 K H z + 4 K H z = 15 K H z

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