Zugangskontrollsystem mit Unterdrückung von Modulationsstörungen

摘要

The system has a code transmitter (30) receiving an interrogation signal. The signal increases modulation by an auxiliary carrier signal to produce an intermediary signal on a base station and to send back the intermediary signal from the station as a return signal. Operating equipment operates the return signal according to code information of the intermediary signal and distance between the object and the transmitter. - An INDEPENDENT CLAIM is also included for a process of operating an access control system.