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DIGITAL COMMUNICATION — Minor 1 2026 question paper

MMMUT Electronics and Communication Engineering previous year question paper for DIGITAL COMMUNICATION (BEC 301), semester 5, Minor 1 2026. All 8 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: DIGITAL COMMUNICATION (BEC 301)
  • Branch: Electronics and Communication Engineering
  • Semester: 5
  • Exam: Minor 1 2026
  • Questions: 8

Questions asked in DIGITAL COMMUNICATION Minor 1 2026

  1. Q1(a). Draw the block diagram of Digital Communication with proper explanation of each block. Let a message signal m(t) be the input to a delta modulator where m(t) = 6sin(2pi*10^3)t + 4sin(4pi*10^3)t volt with t in seconds. What is minimum pulse rate that will prevent slope overload? Step size is 0.314V. [3 marks]
  2. Q1(b). Explain in detail about Baseband Binary transmission Intersymbol interference and its effects? A communication channel of bandwidth 75KHz is required to transmit binary data at a rate of 0.1 Mbps using raised cosine pulses. Determine the roll-off-factor. [2 marks]
  3. Q1(c). Explain the working principle of transmitter and receiver of Differential pulse code modulation. [2 marks]
  4. Q2(a). Write different properties of cumulative distribution function. The PDF of a random variable X is given by f_X(x) = ae^(-xln(1-x)). Determine the relationship between a and b, CDF and probability that the output lies between -1 and 2. Assume -∞ < x < +∞ and a=3. [3 marks]
  5. Q2(b). Enlist the different properties of auto correlation function (ACF). The probability density function (PDF) of a continuous random variable is of the form f_X(x) = (1/λ_0)e^(-x/λ_0) for -∞ < x < +∞. Determine the mean of the random variables. [2 marks]
  6. Q2(c). Write short notes on (a) stationary random process (b) Binomial Distribution (c) Ergodic random process. [2 marks]
  7. QQ1.. Attempt Two parts of the following. Question 1(a) is compulsory.
  8. QQ2.. Attempt Two parts of the following. Question 2 (a) is compulsory.