Title :
Fourth-order spectra of mixture processes
Author_Institution :
US Naval Underwater Syst. Center, New London, CT, USA
Abstract :
The hypothesis for non-Gaussian processes higher-order spectra contain information that usually is not contained in second-order spectra is proved for a special case of the trispectrum using mixture processes. Specifically, the fourth-order cumulant spectrum is shown to differentiate between a Gaussian process and a non-Gaussian mixture process. Mixture processes often represent physical phenomena arising in sonar and radar applications. For example, the reflected components of an active transmission can be composed of a mixture of two sinusoids due to target resonances. It is demonstrated that the fourth-order cumulant spectrum can differentiate between a sum of sinusoids and a mixture of sinusoids
Keywords :
spectral analysis; fourth-order cumulant spectrum; higher-order spectra; mixture processes; radar; sonar; spectral analysis; target resonances; Acoustic scattering; Frequency; Gaussian processes; Radar applications; Radar scattering; Radio access networks; Resonance; Signal processing; Sonar applications; Underwater acoustics;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266934