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Lecture 16: Sampling of Continuous-Time Signals Instructor: Dr. Ghazi Al Sukkar Dept. of Electrical Engineering The University of Jordan

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1 Lecture 16: Sampling of Continuous-Time Signals Instructor: Dr. Ghazi Al Sukkar Dept. of Electrical Engineering The University of Jordan Email: ghazi.alsukkar@ju.edu.jo ghazi.alsukkar@ju.edu.jo Spring 20141

2 Outline  Continuous-time processing of Discrete-time signals:  Sampling rate reduction by an integer factor (downsampling)  Increasing the sampling rate by an integer factor (upsampling)  Changing the sampling rate by Non-integer factor Spring 20142

3 Continuous-time processing of Discrete-time signals: Spring 2014 3 C/D D/C continuous-time system

4 Cont.. Spring 2014 4

5 Application: Non-integer delay Spring 2014 5

6 Cont.. Spring 2014 6 x[n] -3-223410 n -3-223410 n

7 Sampling rate reduction by an integer factor (downsampling) Spring 2014 7 compressor 0510 -5 -10 05 -5 -10 Down sampling

8 Cont.. Spring 2014 8

9 Cont.. Spring 2014 9

10 Cont.. Spring 2014 10 Decimator

11 Cont.. Spring 2014 11 No aliasing aliasing

12 Increasing the sampling rate by an integer factor (upsampling) Spring 2014 12 Expander interpolator 0510 -5 -10 0510 -5 -10 Up Sampling

13 Cont.. Spring 2014 13

14 Spring 2014 14

15 Cont.. Spring 2014 15

16 Changing the sampling rate by Non-integer factor: Spring 2014 16 Expander Decimator interpolator Expander Compressor

17 Cont.. Spring 2014 17

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