Peak of polynomial Wigner-Ville frequency estimation Estimates the instantaneous frequency of the input signal by extracting the peaks of the sixth order kernel polynomial Wigner-Ville distribution. Usage: ife = pwvpe( signal, lag_window_length, time_res, interpol [, fft_length] )) Parameters: signal Input one dimensional signal to be analysed. An analytic signal is required for this function, howver, if signal is real, a default analytic transformer routine will be called from this function before computing tfd. lag_window_length The size of the kernel used for analysis. window_length must be odd. The kernel used will be defined from -(lag_window_length+1)/2 to +(lag_window_length+1)/2 in both time and lag dimensions. time_res The number of time samples to skip between successive slices of the analysis. interpol The number of interpolating the input signal in time domain to get the proper time fractional time lags required to compute the sixth order kernel. fft_length Zero-padding at the fft stage of the analysis may be specified by giving an fft_length larger than normal. If fft_length is not specified, or is smaller than the lag_window_length, then the next highest power of two above lag_window_length is used. If fft_length is not a power of two, the next highest power of two is used. See Also: pwvd4, pwvd6