#6 · Spectral

Discrete Fourier Transform (Spectral)

Detecteaza componente periodice in domeniul frecventei. Testul tratat in profunzime aici.

Intrare

n biti, transformati in +/-1 si trecuti prin DFT.

Statistica

N1 = varfuri sub pragul T = sqrt(ln(20)n); d = (N1 - N0)/sigma; p = erfc(|d|/sqrt(2)).

Decizie

p < alpha => periodicitate, nealeator.

Minim recomandat

1,000 biti

Testul spectral este tratat in profunzime: referatul, controversa 46 vs 48 si figurile.

Ruleaza

metodaalpha100 biti

API

curl -s https://rngtests.danielwagner.ro/api/run/dft \
  -H 'Content-Type: application/json' \
  -d '{"bits":"1100100100001111110110101010001000100001011010001100001000110100110001001100011001100010100010111000"}'