Methods and apparatuses for windowing-based channel filtering in an ofdm-based communication network

Abstract

Disclosed is a method and an apparatus for handling signals in an OFDM-based communication network () received at a receiver (). The method comprises obtaining a signal in time domain, the signal comprising a payload signal sent from a transmitter () towards the receiver () as well as an interference signal, the payload signal residing in a first frequency band and the interference signal residing in a second frequency band outside the first frequency band. The method further comprises separating the payload signal from the interference signal using a filter, and processing () the payload signal with a time window (W, W), or the separated interference signal with a time window, (W, W), or processing both the separated payload signal with a window (W, W) and the obtained signal with a window (W, W), the window (W, W, W) being substantially an OFDM symbol wide, so as to achieve a output signal/first output signal comprising the payload signal and a time-windowed interference signal and/or a second output signal comprising the interference signal and a time-windowed payload signal. The windowed signals become attenuated by the FFT so that the wanted signal are achieved undisturbed.