A study of information included in FOC of harmonic signal
Fan Yang · Journal of Astronautics · 2002
After analyzing Fourth Order Cumulant (FOC) of harmonic signal,it is known that there are three relations among frequencies of harmonic signal included in FOC.One is double frequency (phase) coupling,which is proposed by us first.The other is cubic frequency (phase) coupling.The last is frequencies independent.The all relations maybe exist at the same time in the harmonic signal,possibly one or two of them exists only.Different frequency relations affect the FOC in different way.In order to reduce calculation,the FOC diagonal slice and its spectrum are studied emphatically.The simulation result shows the analysis is correct.