METHOD OF DETECTION OF SIGNALS Russian patent published in 1995 - IPC

FIELD: underwater acoustics. SUBSTANCE: hypothesis of linear change of phase within observation interval is assumed. Quadrature receiver executes operations of multiplication of quadrature components by present observation time, of correlational comparison of assumed realization with results of multiplication of quadrature components, of subtraction and summing of correlational responses of quadrature receiver and newly formed correlational responses. Circuit of realization of proposed technical approach has analog-to-digital converter 1, permanent storage 2, first relative correlation device 3 fourth relative correlation device 4, first multiplier 5, second multiplier 6, second relative correlation device 7, third relative correlation device 8, first adder 9, subtracter 10, first squarer 11, second squarer 12, second adder 13, threshold device 14, control unit 15. EFFECT: increased noise immunity of quadrature receiver under conditions when change of initial phase within observation interval may be approximated by linear laws. 3 dwg