METHOD OF EXTRACTING SIGNAL UNDER CONDITIONS OF INTERFERENCE BY COMPENSATION OF INTERFERENCE DUE TO APPROXIMATION OF VALUES OF ITS AMPLITUDE

摘要

FIELD: radio engineering.;SUBSTANCE: invention relates to radio engineering and can be used in communication systems. Method of extracting a signal under the conditions of interference by compensation of the interference due to approximation of its amplitude values means that a signal is generated by binary phase manipulation and is transmitted at a fixed or a corresponding working frequency, if the working frequency tuning is used, signals are transmitted with a pause in the beginning of transmission and between the signals, the duration of which ranges from two to five periods of the signal change, an additive mixture of the signal and the interference is filtered by a band-pass filter; the produced mixture of the signal and the interference is amplified in an amplifier and readings of the signal and the interference mixture are formed in the digital form, the first and the second readings are taken when the signal is absent in a time equal to the signal variation period, readings are taken at the moments when the signal amplitude value, like if it exists at the given moments, has the maximum value, the latter – the third – reading is taken at the moment when the signal is present in a time equal to the signal variation period using the values of readings taken when the signal is absent, the interference amplitude value is calculated at the moment of taking the third reading using the linear approximation method, the calculated value of the interference amplitude is subtracted from the value of the last reading amplitude, the obtained value is compared to zero in case if the obtained value is greater than zero, the decision is taken that a "1" is present, otherwise, the decision is taken that there is a "0".;EFFECT: technical result is higher noise-immunity of communication systems in the conditions of interference and higher rate of transmitting information.;1 cl, 3 dwg, 4 tbl