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EC-601 RGPV B.Tech

Digital Signal Processing (DSP)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

5 papers, latest Jun 2025

Free
See all 5 papers

Syllabus, notes and important questions for EC-601

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 Discrete-Time Signals and Systems 8 topics
  • Discrete-time signals
  • Discrete-time systems
  • Analysis of discrete-time linear time-invariant systems
  • Discrete time systems described by difference equation
  • Solution of difference equation
  • Implementation of discrete-time systems
  • Stability and causality
  • Frequency domain representation of discrete time signals and systems
Unit 1 notes
Unit 2 The z-Transform 7 topics
  • The direct z-transform
  • Properties of the z-transform
  • Rational z-transforms
  • Inversion of the z transform
  • Analysis of linear time-invariant systems in the z-domain
  • Block diagrams and signal flow graph representation of digital network
  • Matrix representation
Unit 2 notes
Unit 3 Frequency Analysis of Discrete Time Signals 6 topics
  • Discrete Fourier series (DFS)
  • Properties of the DFS
  • Discrete Fourier transform (DFT)
  • Properties of DFT
  • Two dimensional DFT
  • Circular convolution
Unit 3 notes
Unit 4 Efficient Computation of the DFT 4 topics
  • FFT algorithms
  • Decimation in time algorithm
  • Decimation in frequency algorithm
  • Decomposition for ‘N’ composite number
Unit 4 notes
Unit 5 Digital filters Design Techniques 5 topics
  • Design of IIR and FIR digital filters
  • Impulse invariant and bilinear transformation
  • Windowing techniques rectangular and other windows
  • Examples of FIR filters
  • Design using windowing
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 5 past EC-601 papers.

Marks asked per paper, by unit

  • Unit 1 Discrete-Time Signals and Systems 24 marks
  • Unit 2 The z-Transform 22 marks
  • Unit 3 Frequency Analysis of Discrete Time Signals 22 marks
  • Unit 4 Efficient Computation of the DFT 18 marks
  • Unit 5 Digital filters Design Techniques 17 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

  1. Determine the 4-point circular convolution of two given length-4 sequences.

    Asked 4 times: 2025, 2024, 2022

  2. Compute the 8-point DFT using the radix-2 decimation-in-frequency FFT algorithm showing intermediate stages.

    Asked 4 times: 2024, 2022, 2020

  3. State and prove four properties of the DFT (e.g., linearity, circular time/frequency shifting, time reversal).

    Asked 3 times: 2025, 2024, 2020

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