DIGITAL SIGNAL PROCESSING LABORATORY
Course Code:18ECL57
IA Marks:40
Exam marks:60
Number of Lecture Hours/Week:02Hr Tutorial (Instructions) + 02 Hours Laboratory
Exam Hours:03
CREDITS:02
Course Learning Objectives: This course will enable students to
• Compute the DFT for a discrete signal and verification of its properties using MATLAB.
• Find solution to the difference equations and computation of convolution and correlation along with the verification of properties.
1. Compute and display the filtering operations and compare with the theoretical values.
2. Implement the DSP computations on DSP hardware and verify the result.
Laboratory Experiments
Following Experiments to be done using MA TLAB / SCILAB / OCTAVE or equivalent:
1. Verification of sampling theorem (use interpolation function).
2. Linear and circular convolution of two given sequences, Commutative, distributive and associative property of convolution.
3. Auto and cross correlation of two sequences and verification of their properties
4. Solving a given difference equation.
5. Computation of N point DFT of a given sequence and to plot magnitude and phase spectrum (using DFT equation and verify it by built-in routine).
6. (i) Verification of DFT properties (like Linearity and Parseval’s theorem, etc.)
(ii) DFT computation of square pulse and Sinc function etc.
7. Design and implementation of Low pass and High pass FIR filter to meet the desired specifications (using different window techniques) and test the filter with an audio file. Plot the spectrum of audio signal before and after filtering.
8. Design and implementation of a digital IIR filter (Low pass and High pass) to meet given specifications and test with an audio file. Plot the spectrum of audio signal before and after filtering. Following Experiments to be done using DSP kit
9. Obtain the Linear convolution of two sequences.
10. Compute Circular convolution of two sequences.
11. Compute the N-point DFT of a given sequence.
12. Determine the Impulse response of first order and second order system.
13. Generation of Sine wave and standard test signals
CLICK HERE TO DOWNLOAD LAB MANUAL
Course Outcomes: On the completion of this laboratory course, the students will be able to:
• Understand the concepts of analog to digital conversion of signals and frequency domain sampling of signals.
• Modeling of discrete time signals and systems and verification of its properties and results.
• Implementation of discrete computations using DSP processor and verify the results.
• Realize the digital filters using a simulation tool and analyze the response of the filter for an audio signal.
Conduct of Practical Examination:
1. All laboratory experiments are to be included for practical examination.
2. Strictly follow the instructions as printed on the cover page of answer script for breakup of marks.
3. Change of experiment is allowed only once and Marks allotted to the procedure part to be made zero.
Reference Books:
1. Vinay K Ingle, John G Proakis, Digital Signal Processing using MATLAB, Fourth Edition, Cengage
India Private Limited, 2017.
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