Ambiguity function Computes the ambiguity function of the input signal. An analytic signal generator is called if the input signal is real. This version takes advantage of the property K(n,-m)=K*(n,m) to increase calculation speed. Usage: af = ambf( signal, lag_res, window_length ) Parameters: af The computed ambiguity function representation. size(af) will return [a, b], where b is the next largest power of two above (2*window_length), and a is equal signal length. signal Input one dimensional signal to be analysed. An analytic signal is required for this function, however, if signal is real, a default analytic transformer routine will be called from this function before computing the ambiguity function. window_length The number of signal samples used for analysis. lag_res The number of lag to skip between successive slices of the analysis. See Also: analyt