Abstract:
An empirical investigation of detection performance for multiple harmonic components imbedded in controlled noise was performed using both spectral correlation and stationary bispectrum detection statistics. Conventional power spectral processing is used as a metric for detection gain obtained using the higher-order processing methods. Relative performance between power spectral and higher-order spectral methods will be presented as a function of both signal-to-noise ratio and harmonic ``falloff'' at fixed probability of false alarm. The empirical results will also be compared with analytic results obtained assuming asymptotic statistics [G. R. Wilson and K. R. Hardwicke, ``Nonstationary Higher Order Spectral Analysis,'' Appl. Res. Labs. Tech. Rep. ARL-TR-91-8, Applied Research Laboratories, University of Texas, Austin, TX (1991)]. [Work supported under the Independent Research and Development Program, Applied Research Laboratories, The University of Texas at Austin.]