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InsemMar 20242019 patternSE E&TC

Principles of Communication Systems SPPU Insem Question Paper Mar 2024

This 2019-pattern Principles of Communication Systems paper is listed under Communication Engineering. All 4 questions are below, as printed.

Open the PDFMost repeated Communication Engineering questions
Subject code
204193
Pattern
2019 pattern
Exam
Insem
Session
Mar 2024
Max. marks
30
Time
1 Hour
Semester
IV
Paper code
[6268]-213

Printed for: S.E. (Electronics / E & TC/Electronics & Computer Engg.) (Insem)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4.
  2. Neat diagrams must be drawn whenever necessary.
  3. Figures to the right indicate full marks.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      This part has equations that don’t show as text. Open the PDF to read it.

      [5]
    2. b)

      With a neat block diagram explain the working of an eletronic communication system.

      [5]
    3. c)

      Define energy signal. Find the energy of the following signal, X(t) = 2e – 10t . u(t).

      [5]

  2. Q2

    1. a)

      Explain the following signals with an example i) Discrete time signal ii) Periodic signal iii) Digital signal iv) Odd signal, and v) Deterministic signal

      [5]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [5]
    3. c)

      Define fourier transform. State and explain any two properties of the Fourier transform. 2

      [5]

  3. Q3

    1. a)

      Compare DSB-FC AM and SSB-SC AM with respect to any five parameters.

      [5]
    2. b)

      An AM transmitter has carrier of 500W, which is modulated up to a depth of 40%. Find the total power in the transmitted wave and also the power efficiency in the following cases, i) Standard AM (DSBFC) ii) SSB-SC AM

      [5]
    3. c)

      Explain the working of the super heterodyne AM receiver with the help of neat block diagram.

      Also asked:Mar 2025

      [5]

  4. Q4

    1. a)

      Explain the working of envelope detector for detection of amplitude modulated signal with the help of neat waveforms and circuit diagram.

      [5]
    2. b)

      Explain vestigial sideband modulation.

      [5]
    3. c)

      Calculate the percentage power saving for a DSB-SC signal for the percent modulation of i) 100% and ii) 50% … … …

      [5]