Digital Signal Processing

Pre-Requisite: EC201
Contact Hours and Credits: (3 -0- 0) 3


The subject aims to introduce the mathematical approach to manipulate discrete time signals, which are useful to learn digital tele-communication.

Topics Covered:

Review of LSI system theory. DTFT. Frequency response of discrete time systems. All pass inverse and minimum phase systems.

DFT. Relationship of DFT to other transforms. FFT.DIT and DIF FFT algorithm. Linear filtering using DFT and FFT.

Frequency response of FIR filter types. Design of FIR filters. IIR filter design. Mapping formulas. Frequency transformations.

Direct form realization of FIR and IIR systems. Lattice structure for FIR and IIR systems. Finite-word length effects. Limit cycle oscillations.

Sampling rate conversion by an integer and rational factor. Polyphase FIR structures for  sampling rate conversion.

Course Outcomes :

Students will be able to

  • CO1: Analyze discrete-time systems in both time & transform domain and also through pole-zero placement.
  • CO2: Analyze discrete-time signals and systems using DFT and FFT.
  • CO3: Design and implement digital finite impulse response (FIR) filters.
  • CO4: Design and implement digital infinite impulse response (IIR) filters.
  • CO5: Understand and develop multirate digital signal processing systems.

Text Books:

  • J.G. Proakisetal, Digital Signal Processing, (4/e) Pearson, 2007.
  • A.V. Oppenheim & R.W. Schafer, " Discrete Time Signal processing", (2/e),Pearson Education, 2003.
  • S.K. Mitra, Digital Signal Processing (3/e), TMH, 2006.

Reference Books:

  • P.S.R. Diniz, E.A.B. da Silva and S.L. Netto, “Digital Signal Processing”, Cambridge,2002.
  • E.C. Ifeachor & B.W. Jervis : Digital Signal Processing, (2/e), Pearson Education, 2002.
  • J.R. Jhonson, Introduction to Digital Signal Processing, Prentice-Hall, 1989.