Patent ID: 6240129
Filing Date: 2001-05-29
Classification: G06F

Abstract:
A method to reduce leakage in a fourier transformer (FT), said method comprising the steps of:a. receiving an incoming signal (X) comprising data symbols with a data symbol length B; andb. windowing said incoming signal (X) by multiplying it with a window function (W) to thereby generate a sequence of windowed data symbols (X.sub.SW), said window function (W) comprising a window head (HEAD) with a head length H, a window body (BODY) with a body length which equals said data symbol length B, and a window tail (TAIL) with a tail length T, said windowed data symbols (X.sub.SW) having a length H+B+T,characterized in that said method further comprises the step of:c. adding a symbol head of said windowed data symbols (X.sub.SW) to a tail of a symbol body of said windowed data symbols (X.sub.SW), and similarly adding a symbol tail of said windowed data symbols (X.sub.SW) to a head of said symbol body of said windowed data symbols (X.sub.SW) to thereby generate a sequence of folded windowed data symbols (X.sub.SWF) whose length equals said data symbol length B.