Method for frequency- and time-selective interference suppression for a communication system based on ofdm, and receiver therefor

A method for reducing the interfering effects of pulse-shaped interference signals in an OFDM-based data transmission in a modulated data, which is assigned by a receiver, with multiple carrier frequencies, and superimposed pulse-shaped interfering signals, wherein:

• a) the pulse-shaped interfering signals are detected in the modulated OFDM-based signal,
• b) for the suppression of a pulse-shaped interference signal in the reception signal, this is multiplied by a window-function,
• c) the window function is—considered in the time domain as a continuous function—differentiated,
• d) the transmission signal multiplied by the window-function is decoded after a transmission channel estimation and signal equalization,
• e) in the case of a transmission channel estimation of the data which are assigned to the individual carrier frequencies, a reliability value is assigned which describes how credible the received or estimated data is, and
• f) the reliability value for those data associated with the carrier frequencies affected by a pulse-shaped interfering signal is set to zero before the decoding in the receiver,
• wherein a filter bank pulse blanking method FBPB is provided, in which:
• a sampled received signal (r) is fed to a blanking unit for frequency-selective pulse-blanking, which comprises an analysis filter bank with M sub-bands, a module for frequency-selective pulse blanking of the sub-band signals and a synthesis filter bank, which reassembles the signal, and
• the analysis filter bank, which divides the receiving signal into several sub-bands in a frequency-selective manner, in front of a OFDM-windowing in such a manner that the sub-band decomposition is used to apply pulse-blanking sub-band-selectively.