Question: P 2 . Four signals x 1 , x 2 , x 3 , x 4 having bandwidths 1 , 2 , 2 , 4

P2. Four signals x1,x2,x3,x4 having bandwidths 1,2,2,4kHz respectively are sampled and TDM multiplexed. The TDM signal is PCM encoded using a 4-bit PCM encoder.
a) Construct a TDM commutator showing the number of nodes for each signal and the frequency of rotation.
b) Find the bit rate of this TDM system.
c) What is the minimum null bandwidth required to transmit this TDM signal using a sin(t)t pulse shape.
d) What is the minimum null bandwidth required to transmit this TDM signal using a rectangular pulse shape.
P 2 . Four signals x 1 , x 2 , x 3 , x 4 having

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