<< anastep Choice of Particular Signals chirp >>

Time Frequency Toolbox >> Time Frequency Toolbox > Choice of Particular Signals > atoms

atoms

Linear combination of elementary Gaussian atoms.

Calling Sequence

[SIG,LOCATOMS] = atoms(N,COORD,DISPLAY)

Parameters

N :

number of points of the signal

COORD :

matrix of time-frequency centers, of the form [t1,f1,T1,A1;...;tM,fM,TM,AM]. (ti,fi) are the time-frequency coordinates of atom i, Ti is its time duration and Ai its amplitude. Frequencies f1..fM should be normalized (between 0 and 0.5). If nargin==1, the location of the atoms will be defined by clicking with the mouse, with the help of a menu. The default value for Ti is N/4.

SIG :

output signal.

LOCATOMS :

matrix of time-frequency coordinates and durations of the atoms.

Description

atoms generates a signal consisting in a linear combination of elementary gaussian wave packets. The locations of the time-frequency centers of the different atoms are either fixed by the input parameter COORD or successively defined by clicking with the mouse (if NARGIN==1).

Examples

sig=atoms(128);
sig=atoms(128,[32,0.3,32,1;56,0.15,48,1.22;102,0.41,20,0.7]);
sig=atoms(128,[32,0.3,32,1;56,0.15,48,1.22;102,0.41,20,0.7],0);

Authors

<< anastep Choice of Particular Signals chirp >>