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Digital Signal Processing ( week 2 )

Digital Signal Processing ( week 2 ). Preprocess. Insert CD (in your textbook) & Run Matlab File → Set Path Add path “CD/Matlab/spfirst” Click index.htm Click Getting Started → setup “ quicktime ” player. ⇒. ⇒. Review of Sine / Cosine Function. Definition of Sinusoidal signal.

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Digital Signal Processing ( week 2 )

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  1. Digital Signal Processing( week 2 )

  2. Preprocess • Insert CD (in your textbook) & Run Matlab • File → Set Path • Add path “CD/Matlab/spfirst” • Click index.htm • Click Getting Started → setup “quicktime” player

  3. ⇒ ⇒ Review of Sine / Cosine Function • Definition of Sinusoidal signal

  4. Review of Sine / Cosine Function • Basic properties of the sine and cosine functions (1)

  5. Review of Sine / Cosine Function • Basic properties of the sine and cosine functions (2)

  6. Sinusoidal Signal • A : amplitude • Φ : phase shift • w0 : radian frequency (unit : rad/sec) • f0 : cyclic frequency (= w0/2π) , (unit : 1/sec)

  7. Sinusoidal Signal • Relation of Frequency to Period • a periodic signal • T0 : the period of (sinusoidal) signal • f0 : the number of periods(cycles) per second (=1/T0) • if • cosine function은 주기가 2π 이므로 ,

  8. Sinusoidal Signal 예) 다음 신호의 f0를 변경하면서 그래프를 그리시오. • f0 = 10Hz, 5Hz, 0Hz • subplot 이용

  9. Sinusoidal Signal 예) 다음 신호의 f0를 변경하면서 그래프를 그리시오.

  10. Sinusoidal Signal 예) 다음 신호의 f0를 변경하면서 그래프를 그리시오.

  11. Sinusoidal Signal • Phase Shift & Time Shift • x(t) : s(t)의 time-shifted version • t1 is positive ⇒ delayed • t1 is negative ⇒ advanced • if ⇒ Φ 만큼 shift

  12. Sinusoidal Signal 예) EX 2-1 (p.12) • 다음 식을 그래프로 표현 • hold on / off 이용

  13. Sinusoidal Signal 예) EX 2-1 (p.12)

  14. Sinusoidal Signal 예) EX 2-1 (p.12)

  15. 과 제

  16. 과 제

  17. 과 제 • C-1.3 Laboratory • Manipulating Sinusoids with MATLAB (P.460) • 작성한 M 파일과 HWP(DOC) 파일 압축 • 파일명 : 04_학번_성명.zip • 수업시간 끝나기 전까지 • E-mail : young220 @ paran.com

  18. 수고 하셨습니다

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