Cross correlation

The cross correlation function (CCF) of the specified channels is calculated. If Autocorrelation is activated, the autocorrelation function of the channels is calculated. For normalising the ACF or CCF the following options are available

• biased: normalisation to the length of the input signals, so $R_{xy,biased} = \frac{1}{N} R_{xy}$ , with $N$ = length of input signals
• unbiased: The result is normalised as follows: $R(m)_{xy,unbiased} = \frac{1}{N - |m|} R_{xy}(m)$ , with $N$ = length of input signals
• coeff: normalisation to 1 for the centre of the ACFs
• none: without normalisation