Novel time-frequency techniques are proposed: the short time instantaneous higher-order spectra (HOS) with adjustment to measured or known a priori time variation of the instantaneous frequency of transient signals. It is shown that the proposed transforms are more effective than the non-instantaneous HOS (i.e. without adjustment to time variation of the instantaneous frequency) in recognizing a non-stationary nonlinearity.
|Number of pages
|International Journal of Adaptive Control and Signal Processing
|Early online date
|26 Nov 2008
|Published - 1 Mar 2010