(SEM V) THEORY EXAMINATION 2022-23 ANALOG AND DIGITAL COMMUNICATION

Course: B.Tech (Semester V)                                                           Subject Code: KEE-058

Subject Name: Analog and Digital Communication                      Duration: 3 Hours

Total Marks: 100

Section A — Short Questions (2 × 10 = 20 marks)

Students must answer brief questions such as:                Block diagram of a communication channel

Modulation index in AM                                                   Effect of noise on AM

Bandwidth in angle modulation                                       Nyquist criteria for sampling

Advantages of Pulse Amplitude Modulation (PAM)         Types of digital modulation techniques

Bit rate and bandwidth of FSK                                          Advantages of Time Division Multiplexing (TDM)

Entropy in information theory

Section B — Descriptive Questions (10 × 3 = 30 marks)

Attempt any three:

Superheterodyne receiver and its advantages          Mathematical representation of Frequency Modulation

Generation and detection of Pulse Amplitude Modulation

BPSK transmitter and balanced ring modulator        Time Division Multiplexing (synchronous and asynchronous)

Section C — Long Answer Questions (10 × 5 = 50 marks)

SSB-SC Wave: Generation and detection with diagram
or
FDM: Basic concept and hierarchy system                    FM Wave: Indirect method and slope detector
or
Mathematical expression of wideband FM using Bessel function

Delta Modulation: Adaptive delta modulation with block diagram
or
Generation and demodulation of PWM                         FSK: Transmitter and receiver explanation
or
8-bit QAM transmitter and calculation of baud rate, bandwidth, and efficiency

T1 Carrier System: Desirable features and PCM-TDM system
or
Huffman Coding: Design binary Huffman code for given symbol probabilities and calculate efficiency