Module-1: Introduction

A. Block Diagram of Communication System. [5M]

(Definition, Diagram and Explanation)

B. Explain Wired and Wireless Communication. [5M-10M]

C. Explain Modulation and Need for Modulation. [5M-10M]

(Definition, Diagram{Demodulation and need for Demodulation} , Explanation)

Module-2: Noise and Fourier Representation of Signal and System

A. Explain Fourier Transform with following. [5M-10M]

- Definition
- Formula
- Use
- Condition for Existence
- Merits/Advantage
- Limitations
- Properties

B. Explain Inverse Fourier Transform with following. [5M] - Definition
- Formula
- Use
- Condition for Existence

C. State the Merits and Limitations of Fourier Transform. [5M]

D. Name the properties of Fourier Transform. [5M]

Define and State the formula:- - Time Shifting
- Frequency Shifting
- Time Scaling

E. State the Fourier Transform of Delta, Gate and Unit Step signal. [10M]

F. State Convolution Theorem. [5M]

G. Sums on Fourier Transform. [5M]

H. What is Noise? Explain different types of Noise (Internal And External). [10M]

I. Sums on Noise Factor, Noise Figure, Signal to Noise Ratio, Noise Temperature. [5M]

J. Sums on Frizz Formula. [5M]

Note:- From this module study only one i.e. Fourier or Noise.

Module 3: – Amplitude and Angle Modulation Techniques

A. Amplitude Modulation. [5M-10M]

Note:- This module is vast so its difficult to find out important topics, so study according to your knowledge.

Module-4: Pulse Analog Modulation and Digital Modulation

A. State and Prove the Sampling Theorem. [10M]

B. Explain Pulse Amplitude Modulation (PAM). [10M]

- Natural Sampling
- Flat top Sampling

(Block diagram {Generation and Demodulation}, Definition, graph, advantage, disadvantage)

C. Explain Pulse Width Modulation (PWM). [10M] - Natural Sampling
- Flat top Sampling

(Block diagram {Generation and Demodulation}, Definition, graph, advantage, disadvantage)

D. Explain Pulse Position Modulation (PPM). [10M] - Natural Sampling
- Flat top Sampling

(Block diagram {Generation and Demodulation}, Definition, graph, advantage, disadvantage)

Module-5: Multiplexing and Digital Band Pass Modulation Techniques

A. Explain Delta Modulation, Adaptive Delta Modulation and Pulse Width Modulation (Any 1). [10M]

(Block diagram, Definition, formula (if any), advantage, disadvantage)

B. State the drawback of Delta Modulation. [5M-10M]

(Slope overload noise, Granular noise)

C. State the difference between FDM and TDM. [5M]

D. State the difference between FDM and OFDM. [5M]

E. What are Line Codes? State the properties, types, advantages and disadvantages with given binary data. [10M]

F. State and Explain ASK,BPSK,PSK,FSK,QPSK (Any 1 or Any 2) [10M]

(Block diagram {Modulation and Demodulation}, Definition, Comparison Between them)

Module-6: Radiation and Propagation of Waves

A. Explain the types of Propagation. [5M]

B. In Ground Waves, explain what is Line of Sight (LOS) and MUF. [5M]

C. Explain the Sky Wave Propagation and State the following. [10M]

- Critical Frequency
- Virtual Height
- Skip Distance
- Skip Zone

D. Explain the Space Wave Propagation. [5M]