Improving an OFDM reception using an adaptive Nyquist windowing

This paper explains how a windowing of the OFDMSignal in the time domain contributes to its improved reception. The windowing uses the part of the guard interval that is not disturbed by multipath reception. The length of the window adapts to the transmission conditions. This window may be realized with a raised cosine or other kind of function that fulJills the nyquist criterion. An easy way to implement the windowing keeping the FFT complexity low shall also be shown. The impact of windowing,for discrete sine spurious, white noise, phase noise andpequency deviations shall also be given.