Device for digital processing with frequency filtering and reduced computation complexity

摘要

A device for processing digital data. A module (M 2 , M 3 ) produces on a data vector of the frequency domain Z(k), wherein K varies from 0 to N-1, a convolution with a function U, convolution which corresponds to a cancellation in the time domain of the samples of the inverse transform of Z(k). The function U is in the form: U(k)=sin c(k-k₀/2.e)-jpi(alpha(k-k₀/2.P(k)), wherein K₀ is a constant integer and P(k) a weighting window symmetrical about k₀.