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Time Frequency Toolbox >> Time Frequency Toolbox > Other > dwindow

dwindow

Derive a window.

Calling Sequence

DH=dwindow(H)
DH=dwindow(N,NAME [,PARAM [,PARAM2]])

Parameters

H :

a real vector: the window coefficients.

N :

a positive integer value: the length of the window

NAME :

a character string : the name of the window shape (see below)

PARAM :

a real number: an optional parameter for 'Kaiser', "Spline" or "Nutbess" windows

PARAM2 :

a real number: a second optional parameters for "Spline" or "Nutbess" windows

DH :

a real vector with same sizes as H: the coefficients of the derivative of H.

Description

dwindow(H) computes an estimation of the given window H. It is should not be accurate for small length windows. dwindow(N,NAME,...) compute exact derivative of the window defined by its name and its length. See tftb_window.

Examples

h=tftb_window(210,"hanning");
clf;
subplot(211);plot(h);
subplot(212);plot(dwindow(h));xgrid()

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