MULTIPLE FEEDBACK CONTROL RELAY SYSTEM AND METHOD THEREOF, CAPABLE OF EASILY REMOVING A PLURALITY OF FEEDBACK SIGNALS INCLUDED IN RECEIVED SIGNALS

摘要

PURPOSE: A multiple feedback control relay system is provided to be stably operated while effectively removing multiple feedback signals, and to program a multiple delay signal combiner such that the combiner can process a digital signal through a frequency down conversion, thereby processing plural feedback signals by using a digital programming circuit. CONSTITUTION: A receiving filter(210) receives plural feedback signals and relay signals, and removes frequency band signals except desired receiving frequency bands. A receiving frequency down converter(220) lowers frequencies of receiving signals where the frequency band signals are removed. An output detector(290) detects signals delivered through a service antenna(20). A feedback filter(230) receives a detected reference signal, and compensates for an electrical property. A feedback frequency down converter(240) down-converts a frequency of the reference signal to be identical with the lowered frequencies of the down converter(220). A multiple delay signal synthesizer(250) synthesizes the frequency-lowered receiving signals with the reference signal, and removes plural feedback signals. A frequency up converter(260) receives the receiving signals whose feedback signals are removed, and up-converts the frequencies of the signals. A signal amplifier(270) receives the up-converted signals to amplify the signals. An output filter(280) removes frequency band signals except delivered frequency bands, and outputs the signals.