A METOD OF PROVIDING INTERFERENCE IMMUNITY TO MOBSLE COMMUNICATION IN THE CASE OF INTRA-SYSTEM INTERFERENCE
DOI:
https://doi.org/10.26906/SUNZ.2020.1.155Keywords:
mobile communication, noise immunity, spectral processing, correlationAbstract
The subject of the stady is the process of providing wireless noise-resistant transmission of discrete information based on ultra-wideband signals with high information capacity. The goal is to develop recommendations for ensuring electromagnetic compatibility of an ultra – wideband communication system when transmitting discrete messanger over a communication channel with additive Gausssan noise. The task is to ensure stabile and reliable operation of an ultra – wideband communication system in the condition of intra-system interference. Methods used: methods of analytical & imitative modeling and digital coding of signals. The following results are obtained. It is shown that random changes in the energy and autocorrelation functiov of received ultra-wideband signals in the information bit stream are the cause of intra-system interference. In turn, this causses an increase in bit error and degradation of the probabilistic characteristics of communication systems. The obtained characteristics of the bit error indicate a highlevel of secrecy and electromagnetic compatibility of the – wideband communication system when transmitting discrete messages over the communication channel with additive Gausssan noise. Moreover, when using non-aliquot delays of coding pulses in the process of code spectral modulation, we obtain the probability of a bit error at a level of 10(-5) – 10(-6) with a significantly smaller unit signal-to-nois ratio. Conclusion. The use of ultra – wideband signal technology allows wireless cover transmission of information with low radiation power at speed 1-2 Mb/s with a probability of error per bit of at least of 10 . Thus, the system of ultra – wideband radio communication system with a code modulation it the transmitter and spectral processing it the receiver has higs noise immunity, which allows reliable transmission of digital information in the event of intra-system interferenceDownloads
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