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Time Frequency Toolbox >> Time Frequency Toolbox > Choice of the Instantaneous Frequency > fmlin

fmlin

Signal with linear frequency modulation.

Calling Sequence

[Y,IFLAW]=fmlin(N)
[Y,IFLAW]=fmlin(N,FNORMI)
[Y,IFLAW]=fmlin(N,FNORMI,FNORMF)
[Y,IFLAW]=fmlin(N,FNORMI,FNORMF,T0)

Parameters

N :

number of points

FNORMI :

initial normalized frequency (default: 0.0)

FNORMF :

final normalized frequency (default: 0.5)

T0 :

time reference for the phase (default: N/2).

Y :

signal

IFLAW :

instantaneous frequency law (optional).

Description

fmlin generates a linear frequency modulation. The phase of this modulation is such that Y(T0)=1.

Examples

z=amgauss(128,50,40).*fmlin(128,0.05,0.3,50);
plot(real(z));

See also

Authors

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