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matlab 10

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matlab 10

  1. 1. Lab No.10 Discrete time Fourier transform (Frequency response) Designed by : Dawar Awan dawar@cecos.edu.pk CECOS College of Engineering and IT March – July 2012
  2. 2. DTFT : Example CECOS College of Engineering and IT March – July 2012
  3. 3. DTFT : Example CECOS College of Engineering and IT March – July 2012
  4. 4. DTFT : Example CECOS College of Engineering and IT March – July 2012
  5. 5. DTFT : Example CECOS College of Engineering and IT March – July 2012
  6. 6. DTFT : Example CECOS College of Engineering and IT March – July 2012
  7. 7. DTFT : Example CECOS College of Engineering and IT March – July 2012
  8. 8. Task 1. Repeat DTFT_example for three other values of frequency CECOS College of Engineering and IT March – July 2012
  9. 9. DTFT Properties  Time Shifting(Program12_2) x[n-no] ↔ e-jωn0X(ejω) CECOS College of Engineering and IT March – July 2012
  10. 10. DTFT Properties  Time Shifting(Program12_2) CECOS College of Engineering and IT March – July 2012
  11. 11. Task 1. Run Program12_2, and comment on your results 2. Run the program for some other values of time shift 3. Run the program for some other sequences CECOS College of Engineering and IT March – July 2012
  12. 12. DTFT Properties  Frequency Shifting(Program12_3) ejω0nx[n] ↔ X(ej(ω-ω0)) CECOS College of Engineering and IT March – July 2012
  13. 13. DTFT Properties  Frequency Shifting(Program12_3) CECOS College of Engineering and IT March – July 2012
  14. 14. Task 1. Run Program12_3, and comment on your results 2. Run the program for some other values of frequency shift 3. Run the program for some other sequences CECOS College of Engineering and IT March – July 2012
  15. 15. DTFT Properties  Convolution(Program12_4) x[n]*h[n] ↔ X(ejω) H(ejω) CECOS College of Engineering and IT March – July 2012
  16. 16. DTFT Properties  Convolution(Program12_4) CECOS College of Engineering and IT March – July 2012
  17. 17. Task 1. Run Program12_3, and comment on your results 2. Run the program for some other sequences CECOS College of Engineering and IT March – July 2012
  18. 18. DTFT Properties  Time reversal(Program12_5) x[-n] ↔ X(e-jω) CECOS College of Engineering and IT March – July 2012
  19. 19. DTFT Properties  Time reversal(Program12_5) CECOS College of Engineering and IT March – July 2012
  20. 20. Task 1. Run Program12_3, and comment on your results 2. Run the program for some other sequences CECOS College of Engineering and IT March – July 2012

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