Radio communication system and transmitter and receiver equipment therefor

摘要

A system providing radio communication between a first station and at least one additional station wherein the first station is equipped to transmit an interrogation signal and also an information-bearing signal having a key signal component and an information signal component, wherein the additional station is equipped to receive the information-bearing signal and to store the information contained in the information signal component in a read/write memory only when the key signal component corresponds to a pre-selected key code, and wherein the additional station provides for the transmission of the stored information upon the reception of the interrogating signal to facilitate the reception of such information at the first station.