Patent ID: 8107557

Claim:
A reception system having a switching arrangement for suppressing change-over interference in a base band range of a multi-antenna scanning diversity system, comprising: a) a plurality of antennas; b) a diversity processor for receiving antenna signals from said plurality of antennas and which is adapted to generate antenna change-over signals for changing over to a different antenna signal if interference reception conditions are present; c) an interference suppression circuit situated in a base band part of the system for receiving interference-masking-signals, which are derived in said diversity processor from switching signals for changing over to a different antenna signal; d) an interference detector for checking for interference in the reception signal, said interference detector being in communication with said diversity processor, said interference detector for creating switching signal pulses for changing over to a different antenna signal and for causing a pulse-like signature signal which is fed into a signal path of the reception signals; e) a coupling element, for coupling in a pulse like signature signal with the antenna reception signals for time marking a change-over process that occurs in coordination with switching wherein said coupling element, and f) a reception channel filter of said reception system that limits a frequency band, wherein said reception channel filter is disposed downstream from said coupling element; wherein said interference suppression circuit initiates interference masking from a base band signature signal formed after said reception channel filter, said reception system further comprising: a frequency converter; an oscillator; an FM demodulator; an interference masking unit; and a reception channel filter, which is structured as an IF filter wherein said IF signal is passed to said diversity processor to test for interference in said reception signal wherein said IF filter is followed by said FM demodulator, wherein said FM demodulator is followed by said interference masking unit, wherein said audio signal is passed to said interference suppression circuit contained in the unit and also passed to said signature signal evaluation, wherein said signature signal evaluation produces an interference masking signal that is present at an output of said signature signal evaluation, wherein said interference masking signal is passed to said interference suppression circuit to trigger interference masking, so that an audio signal that has been purified of switching interference is present at an output of said interference masking unit.