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com_psd: Correct the special handling of dc and nyquist component in fftw branch

This commit is contained in:
dwarning 2017-08-26 17:20:19 +02:00
parent 2c0081e5c0
commit 0ef666ea26
1 changed files with 7 additions and 2 deletions
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9
src/frontend/com_fft.c
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@ -397,14 +397,19 @@ com_psd(wordlist *wl)
scaling = (double) length;
intres = (double)length * (double)length;
noipower = 0.0;
for (j = 0; j < fpts; j++) {
fdvec[i][0].cx_real = out[0][0]*out[0][0]/intres;
fdvec[i][0].cx_imag = 0;
noipower = fdvec[i][0].cx_real;
for (j = 1; j < fpts-1; j++) {
fdvec[i][j].cx_real = 2.* (out[j][0]*out[j][0] + out[j][1]*out[j][1])/intres;
fdvec[i][j].cx_imag = 0;
noipower += fdvec[i][j].cx_real;
if (!finite(noipower))
break;
}
fdvec[i][fpts-1].cx_real = out[fpts-1][0]*out[fpts-1][0]/intres;
fdvec[i][fpts-1].cx_imag = 0;
noipower += fdvec[i][fpts-1].cx_real;
#else /* Green's FFT */