JOINT TIME-FREQUENCY AND WAVELET ANALYSIS OF KNOCK SENSOR SIGNAL

A method 150 includes receiving 152 a noise signal sensed by a knock sensor 23 disposed in or proximate to a combustion chamber 12 of a combustion engine 10, preconditioning the noise signal to generate a preconditioned noise signal, and process the preconditioned noise signal to determine a location, a time, or a combination thereof, of a peak firing pressure in the combustion chamber of the combustion engine.