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A-A+ B-B+ C-C+ F. Week 11. Chapter 10 Fourier Transforms 1.The Four Fourier transforms CTFT DTFT FS DFT/S 2.Relationships 3.Important properties.

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Presentation on theme: "A-A+ B-B+ C-C+ F. Week 11. Chapter 10 Fourier Transforms 1.The Four Fourier transforms CTFT DTFT FS DFT/S 2.Relationships 3.Important properties."— Presentation transcript:

1 A-A+ B-B+ C-C+ F

2 Week 11. Chapter 10 Fourier Transforms 1.The Four Fourier transforms CTFT DTFT FS DFT/S 2.Relationships 3.Important properties

3 1.The Four Fourier transforms The signal spaces The transform definitions 2.Relationships 3.Important properties

4 The 4 Signal Spaces CTFT is defined for ContSignals DTFT is defined for DiscSignals FS is defined for ContPeriodic p DFT (DFS) defined for DiscPeriodic p

5 CTFT

6 CTFT Intuition

7 Properties 1 Sinusoids

8 Example FS & FT of periodic signals

9 Properties 2 Time change

10 Example

11 Properties 3 Symmetry

12 Properties 4 More symmetry

13 Example

14

15 Properties 5 Duality

16 Example

17

18 Properties 6 Convolution

19

20 Properties 7Delay

21 Properties 8Modulation

22 Discrete-time Fourier Transform (DTFT)

23 Example Rectangle

24 Example Upsampling

25 Fourier series 012 1

26 Discrete Fourier Transform (DFT) 07 1

27 Fourier series and DTFT

28 SummaryDefinitions CTFT InvCTFT DTFT InvDTFT

29 FS InvFS DFT InvDFT

30 Properties for CTFT Linearity Symmetry Duality Convolution Time-scale Multiplication Modulation Delay

31 Properties for DTFT Periodic Convolution Multiplication Delay Modulation Upsampling

32 Important signals Delta Complex exponentials, sinusoids Rectangular pulse, sinc Exponentials


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