wave sum of sin wave and cos wave Slides: 33 Download presentation 전자통신연구실 신호 해석 신호란 ? wave sum of sin wave and cos wave 3 전자통신연구실 Fourier series For the periodic signals. 4 전자통신연구실 Fourier series 5 전자통신연구실 Fourier series 6 전자통신연구실 Fourier series Example s(t) cos(t) t 7 전자통신연구실 Required Equations 8 전자통신연구실 Required Equations 9 전자통신연구실 Required Equations 10 전자통신연구실 Complex Fourier Spectrum Example Find t 11 전자통신연구실 Fourier Transform 시간 함수 주파수 함수 Fourier Transform Inverse Transform 12 전자통신연구실 Fourier Transform 1. 5 1 1 0. 5 -4 -2 - 0. 5 2 4 13 전자통신연구실 특이 함수 Unit step function 1 0 t 20 전자통신연구실 특이 함수 Relations between Unit step function and Sgn function 1/2 (1/2)sgn(t) 1 1/2 + U(t) = -1/2 22 전자통신연구실 Convolution x(t) h(t) 24 전자통신연구실 Convolution Example -1 Find r(t) s(t) 1 1 1 t -2 t 2 25 전자통신연구실 Convolution Example Find r(t) s(t) 1 -1 1 1 t 3 26 전자통신연구실 Convolution when 27 전자통신연구실 Fourier Transform의 특성 Example Find F[s(t)] |t| < 1 = 0 elsewhere Example Find F[s(t)] s(t) = 1, = 2, = 1, = 0, -1 < t < 0 0<t<1 1<t<2 elsewhere 30 8 sin 22 5° cos 112 5°Nyatakan cos 2a. sin5a dalam bentuk penjumlahanSum and difference formulasSum0Triangle sin cos tanQuadrants of sin cos tanSine cosine tangent quadrantsCosine ratioExact value trianglesCo function identitiesJika sin 5 derajat = pCos c -cos d formulaSen a cos b sen b cos aLa fabulaStruttura narrativa di un testoCos-1a + cos-1b formula(270° < x < 360°) terletak pada kuadranSin cos tan quadrantSin cos radianCos sin lenteleUnit circle sin cos tanTan pi/6Contoh soal sudut depresiTan cot sin cosTrig circleIdentidades trigonometricasE^iwt=cos wt+sin wtTangens tabelaCos squared x formulaTabel sin cos tanSin cos tan graphChapter 6 trigonometryTrigonometric definitionsDiketahui tan 20°=p+1