ESS210B
Prof. Jin-Yi Yu
Bandwidth in Time-Lag Correlation Method
qWith the time-lag correlation method, the bandwidth of the power spectrum is determined by the maximum time lag (L) used in the calculation:
q                  Df = 1 cycle/(2LDt).
qNumber of frequency band = (Nyquist frequency – 0) / Df
q                                                 = (2 Dt)-1 / (2L Dt)-1 = L
qNumber of degrees of freedom = N/(number of bands)
q                                                       = N/L