Method and device for generating windowing subband waveform

The present invention relates to wireless communication field, and discloses a subband windowed waveform generating method and apparatus, without copying the data to complete the sub-band windowed waveform, implementation easier. In the present invention, a sub-band block basis, appropriate expansion cycle the data block to obtain a sequence; sequence of time-domain filtering; specified portion of the filtering result of the multiplication is weighted with a window function, to give the sub-band waveform.