Digital Communication — Winter 2024

With the help of neat diagram explain the transmitter and receiver of Pulse Code Modulation

State and prove the sampling theorem for the low pass signal.

Explain companding process in PCM and state the different laws for companding

Derive the formula for signal to quantization noise ratio for PCM.

Explain Inter symbol interference in digital communication and how to achieve zero ISI.

Explain the working principle of 1-bit DPCM. List the problems associated with it.

Discuss the significance of Eye Diagram in the pulse detection technique

Describe frame structure of T1 system in brief

Explain the concept of scrambling with suitable example.

Discuss the effect of slope overloading in delta modulation .

Draw the block diagram of regenerative repeater and briefly explain the function of each block

List out different parameter that should be examined for the selection of the line codes? Explain each in brief .

Differentiate between RZ and NRZ line codes

Discuss the MSK modulation technique and list the merits of it

With the help of block diagram, waveforms and expressions explain the operation of DPSK transmitter

Explain Noise Figure (NF) in detail.

Discuss the advantages and disadvantages of MSK as compared to QPSK

Explain Quadrature Amplitude modulation. Compare 8-QAM with 8-PSK.

Differentiate between Coherent and Non Coherent detection

Discuss practical communication system in the light of Shannon theorem.

Explain central limit theorem and its significance in channel estimation.

Discuss and prove properties of CDF,

A Discrete Memory less Source Xhas four symbols x ,x ,x ,x with probabilities P(x )= 0.4, P(x )= 0.3, P(x )= 0.2, P(x )= 0.1. Calculate Entropy H(X).

Explain Cyclic code with suitable example.

List out types of random variable and explain them.