Discrete Fourier transform (DFT) is the most widely used method for determining the frequency spectra of digital signals. In this paper, a 2D sliding DFT (2D SDFT) algorithm is proposed for fast ...

In this paper, a new algorithm estimating the number of active flows in a data stream is proposed. This algorithm adapts the HyperLogLog algorithm of Flajolet et al. to data stream processing by ...