METHOD FOR SELECTION OF THE PERIODIC FREQUENCY SWEEPING RADIO INTERFERENCE PARAMETERS

Many modern short-range radio suppression means are built on voltage-controlled generators which emission is a sinusoidal oscillation with altering frequency that changes according to a linear law within a given suppression band. Such radio emissions are classified as periodic frequency sweeping radio interferences and their power has an inhomogeneous distribution in the frequency domain. The specified radio interference has two main parameters that determine its time and frequency characteristics: the operating frequency band and the repetition period. The parameters values affect the structure of the interference energy spectrum, which influences its efficiency, that is characterized by the suppression coefficient. The method for selection of the periodic frequency sweeping radio interference parameters to ensure the minimum value of the suppression coefficient of radio channel receivers with specified characteristics is proposed in the article. The method allows to select the parameters of the interference for effective suppression of radio channel receivers with a fixed operating frequency and frequency hopping spectrum spreading. It is shown that for suppression of a fixed operating frequency radio signal receiver the interference period must be no less than the reciprocal of the receiver bandwidth. To ensure the minimum value of the suppression coefficient of radio signal receivers with frequency hopping spectrum spreading, it is necessary to take into account the acceptable error probabilities of receiving a bit symbol and a data packet, which allows, at their low values, to reduce the suppression coefficient by 6 dB The performance of the developed method for selection of the periodic frequency sweeping radio interference parameters is verified by simulation modeling in the MATLAB software environment. The dependences of the packet error rate on the signal / interference ratio and the interference repetition period are given.