G.G. Vertogradov1, V.G. Vertogradov2, V.Yu. Nesterov3
1,3 Southern Federal University (Rostov-on-Don, Russia)
2 FSUE “Rostov-on-Don Research Institute of Radio Communication” (Rostov-on-Don, Russia)
1 vertogradovgg@gmail.com; 2 v.vitaly.g@yandex.ru; 3 vadnesterov@sfedu.ru