FFT window question 2009-03-18 02:14:27 A sliding window FFT analysis equation:Y(lamda,k) = \sum_{mu =0}^{L-1} [y(lamda*R + mu) * h(mu) * exp (-j*2pi*k*mu/L)]. (A)Here,R is frame shift and h refer to the window.Rainer Martin said:Furthermore,to facilitate our notation and to avoid unnecessary normalizationfactors we assume \sum_{mu =0}^{L-1}( (h(mu))^2) = 1 ; (B)I wonder: how the equation B can reach the idea " to facilitate our notation and to avoid unnecessary normalizationfactors " ?some maybe useful hint: the subsequent work is to optimally smooth the spectra ,and then to get noise estimate in terms of mimimun statistics. RegardsHyeeWang