fmsin

Purpose

Signal with sinusoidal frequency modulation.

Synopsis

[y,iflaw] = fmsin(N)
[y,iflaw] = fmsin(N,fmin)
[y,iflaw] = fmsin(N,fmin,fmax)
[y,iflaw] = fmsin(N,fmin,fmax,period)
[y,iflaw] = fmsin(N,fmin,fmax,period,t0)
[y,iflaw] = fmsin(N,fmin,fmax,period,t0,f0)
[y,iflaw] = fmsin(N,fmin,fmax,period,t0,f0,pm1)

Description

fmsin generates a sinusoidal frequency modulation, whose minimum frequency value is fmin and maximum is fmax. This sinusoidal modulation is designed such that the instantaneous frequency at time t0 is equal to f0, and the ambiguity between increasing or decreasing frequency is solved by pm1.

Name	Description	Default value
N	number of points
fmin	smallest normalized frequency	0.05
fmax	highest normalized frequency	0.45
period	period of the sinusoidal frequency modulation	N
t0	time reference for the phase	N/2
f0	normalized frequency at time t0	0.25
pm1	frequency direction at t0 (-1 or +1)	+1
y	signal
iflaw	instantaneous frequency law

Example

         z=fmsin(140,0.05,0.45,100,20,0.3,-1.0);
         plot(real(z));

See Also

fmconst, fmlin, fmodany, fmhyp, fmpar, fmpower.

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