# Dcmplx wn twittle factors

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Unformatted text preview: " ! !" ! ∗! ! ! ! ! (! ! ) !" ! ! ∗ ! !(!! ! ) . Also at . If x(t) is of cos function, then the value ∗ ! !" . Also at frequency (N ­m)/N (Hz), the DFT value is ∗ ! !!" . Here N = 16, fs = 1600Hz, then we can get the corresponding non ­zero DFT outputs are shown as below: i): X[4] = 32∠ − 90°, X[12]= 32∠90° ii): X[3]=16∠ − 90°, X[13]=16∠90°, X[4]=8∠0°, X[12]=8∠0° iii): X[1]=4∠90°, X[15]=4∠ − 90° iv): X[1]=4∠90°, X[15]=4∠ − 90°, X[0]=48∠0 Q7. Answer: i): Code is as below: #include<complex> #include<iostream> #include<cmath> using namespace std; typedef complex<double> dcmplx; #define N 8 const dcmplx I = dcmplx(0,1); //i (or j if you prefer) const double PI = 4.0*atan(1.0); //3.14 etc. dcmplx W[N]; //twittle factors // initilize the twittle factors void initW(dcmplx W) { for(int n=0;n<...
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## This note was uploaded on 01/13/2014 for the course EECS 452 taught by Professor Staff during the Fall '08 term at University of Michigan.

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