A method for discrete exchange of electromagnetic signals between a first and a second transmitter - receiving device and system for carrying out the method.

摘要

The process according to the invention, consists of: - transmit, by means of the first station 1, a plurality of interrogation signals successively oriented in a plurality of directions thetai, each interrogation signal comprising the coded data indicating the direction thetai in which it is transmitted; - receive, by means of the second station 2, an interrogation signal, and decoding the coded data that it contains, in order to determine the direction thetai + pi which is located the first station 1; - transmit, by means of the second station 2, a response signal directed solely in the direction thetai + pi which is located the first station 1. / p & & p & application to the radio - communications systems, military and to the identification friend - enemy.