A method of frequency and time selective interference cancellation for a communication system based on OFDM and receivers therefor

摘要

A method for reducing the interference of pulse-shaped interference in an OFDM-based data transmission in a received from a receiver multi-carrier frequency signal with individual carrier frequencies associated modulated data and superimposed pulse-shaped interference signals, wherein: a) the pulse-shaped interference signals are detected in the modulated OFDM-based signal , b) for masking out a pulse-shaped interference signal in the received signal, this is multiplied by a window function, c) the window function - in the time domain considered as a continuous function - differentiable, d) the multiplied by the window function transmission signal is decoded after a transmission channel estimation and signal equalization, e ) is assigned a reliability value in a transmission channel estimation of the data associated with the individual carrier frequencies, which describes how credibly the received or ges et seq., and f) the reliability value for those data associated with the carrier frequencies affected by a pulse interference signal is set to zero before decoding in the receiver, characterized in that a filter bank pulse blanking method FBPB is provided in which - a sampled received signal (r) is fed to a blanking unit (BU) for frequency-selective pulse blanking, which consists of an analysis filter bank (AFB) with M subbands, a module for frequency-selective pulse blanking of the subband Signals (PBS) and a synthesis filter bank (SFB), which reassembles the signal, and - the analysis filter bank (AFB), which frequency-selectively divides the received signal (r) into several subbands, before an OFDM Windowing (DFT) is used, such that the Subbandzerlegung Pulse Blanking is applied subband-selective.