This document discusses basic operations that can be performed on digital signals, including time shifting, time folding, time scaling, and amplitude scaling. Time shifting involves delaying or advancing a signal, time folding involves repeating a signal, and time scaling involves compressing or expanding the time axis of a signal. The document also briefly mentions performing arithmetic operations and multiple operations on dependent signal variables.

1. 15EE55C – DIGITAL SIGNAL PROCESSING AND ITS
APPLICATIONS
BASIC OPERATION ON SIGNALS
Dr. M. Bakrutheen AP(SG)/EEE
Mr. K. Karthik Kumar AP/EEE
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
NATIONAL ENGINEERING COLLEGE, K.R. NAGAR, KOVILPATTI – 628 503
(An Autonomous Institution, Affiliated to Anna University – Chennai)

2. TIME SHIFTING

3. TIME SHIFTING - DELAY

4. TIME SHIFTING - ADVANCEMENT

5. TIME SHIFTING – KEY POINT
If given signal is x(-n)
x(-n-N) – Advancement
x(-n+N) – Delay

6. TIME FOLDING

7. TIME FOLDING

8. TIME SCALING

9. TIME SCALING - COMPRESSION

10. TIME SCALING - EXPANSION

11. AMPLITUDE SCALING

12. ARITHMETIC OPERATIONS ON DEPENDENT VARIABLES

13. FOR MULTIPLE OPERATIONS