Optimized parametric bispectrum estimation
Chong Koo An, S.B. Kim, Edward J. Powers · 2003
When analyzing various signals produced by some nonlinear process, higher-order spectra are necessary to characterize the nonlinearity. For example, the bispectrum is very useful in analyzing three-wave nonlinear interaction data. An optimized parametric bispectrum estimation method is presented. It is shown to be particularly advantageous when estimating from either short duration records, or under poor signal-to-noise ratio conditions. The performance is compared to a nonoptimized parametric algorithm as well as the FFT (fast Fourier transform) approach.>