METHOD AND SYSTEM FOR ENSURING INTERCOMMUNICATION OF TWO RADIO-RELAY STATIONS

摘要

FIELD: communications engineering. SUBSTANCE: method provides for communication between two radio-relay stations each one radiating microwave information-transfer signal to adjacent station and receiving it from the latter at same carrier frequency with time shared radiation and reception of signal at given station by time-division multiplexed channels. Provision is made at first station for time shift of initiation of received-signal sampling period relative to that of radiated signal which is a multiple of channel interval length. This is attained by measuring delay tº1.2 of signal radiated by first station, received and re-radiated by second station towards first station, and by changing sampling period To@g of signal radiated by first station to Tg1 so as to make it satisfy one of conditions or , where n is number of channel intervals in sampling period and usually n = 2 ; l = 5 through 9; k is integer number of channel intervals in remainder ; m = 2 through 4; is integer part of quotient. tº1.2 can be found a priori by any known method, including that used in radio engineering. We propose measuring tº1.2 prior to starting communications while radiating during certain period single channel interval frame sync signal within every four sampling periods using known method of pulsed range finding. System implementing this method is built up of two radio-relay stations each incorporating series-connected multiplexing equipment, AND gate, separating band filter, transmitter, TRANSMIT-RECEIVE switch with TR tube, and antenna; inserted between antenna output and input of multiplexing equipment synchronizing unit are series-connected second separating band filter and receiver. Series-connected modulating pulse shaper whose second input is connected to output of multiplexing equipment synchronizing unit and inverter whose input is combined with second input of AND gate are i