About this previous year paper
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