| 摘要 |
The invention relates to a method for deriving interference signals from modulated, digital signals. The receiver end then reconstructs the modulated digital signals sent by a transmitter. These reconstructed modulated digita l signals are then subtracted from the received modulated digital signals, a nd the result of the subtraction is used to estimate the interference signal s without influence by prior filtering at the receiver end. By way of exampl e, it is possible to demodulate the interference signals estimated at the re ceiver end in order to ascertain possible unauthorized carrier frequencies w hich disturb the regular carrier frequencies, even if the interference signa ls are not completely in the bandwidth of the regular carrier frequency or c arrier frequencies.
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