METHOD FOR CORRELATION PROCESSING OF MIXTURE OF HARMONIC SIGNAL AND NOISE Russian patent published in 2013 - IPC G06F17/15 

FIELD: information technology.

SUBSTANCE: method comprises steps of: representing the mixture with an array of time-equidistant digital codes; deriving a primary correlation function of the array; cutting the end portion therefrom and deriving a secondary correlation function from the remaining portion; subsequent correlation functions are derived similarly, either until extracting a harmonic signal in the next correlation function, or until an unallowable reduction in duration thereof after another cutting; said array of digital codes is considered first, turned in reverse sequence and considered second; cross-correlation functions CCF11 of the first array with the second and CCF12 of the second array with the first are generated; end portions thereof are cut; the remaining portions are used to generate cross-correlation functions CCF21 between CCF11 and CCR12 and CCF22 between CCF12 and CCF11; the next CCF are similarly derived from secondary cross-correlation functions CCF21 and CCF22.

EFFECT: high signal-to-noise ratio in the derived cross-correlation functions and extracting a harmonic signal in the analysed mixture with low signal-to-noise ratio.