angielski > polski Technika/inżynieria Telekomunikacja Metody dostępu do bezprz

"zakłócona"odpowiedź/reakcja częstotliwości?

Kontekst:

Next the noisy estimates are transformed to the time domain through a P-point IFFT as:

WZOR

where K is the number of sub-carriers in the sub-band and the IFFT size P can be chosen as the smallest power-of-2 integer that is larger than K. w(k) is an optional weighting window applied onto the noisy frequency response. The windowing is to reduce the power leakage problem caused by the discontinuity from the edge of the band to null subcarriers (since zeros are inserted in place of the null sub-carriers before the IFFT). It can be thought as an artificial pulseshaping filter that is a "sinc" function if a flat weighting is applied. The pulse-shaping filter can reduce the tail effect so that there will be fewer taps in hm (