FIELD: radio engineering and communications.
SUBSTANCE: in the method of information exchange using frequency shift modulation and coherent accumulation of a signal, a signal consisting of several harmonic signals is generated using modulation with optimum frequency shifts (FSK) between the adjacent signals. At the stage of entering into communication, synchronization of communication means is carried out. Conversion to digital form is carried out in the corresponding analog-to-digital converters (ADC). N-groups of samples of the additive mixture of signal and interference entering the receiver are digitally formed. Groups of samples are formed in accordance with twice the frequency of the harmonic components of the signal. Values of the amounts of samples are calculated for each group of samples, the obtained values of the amounts are compared with the threshold, according to the results of the comparison it is concluded that there is no signal with the corresponding frequency.
EFFECT: better noise immunity of communications, as well as reducing the computational complexity of signal processing by a few dozen times, which allows to increase the data exchange speed.
1 cl, 2 tbl, 1 dwg
