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Purpose
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Signal with constant frequency modulation.
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Synopsis
[y,iflaw] = fmconst(N)
[y,iflaw] = fmconst(N,fnorm)
[y,iflaw] = fmconst(N,fnorm,t0)
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Description
fmconst generates a frequency modulation with a constant
frequency fnorm and unit amplitude. The phase of this
modulation, determined by t0, is such that y(t0)=1. The
signal is analytic.
| Name |
Description |
Default value |
| N |
number of points |
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| fnorm |
normalised frequency |
0.25 |
| t0 |
time center |
N/2 |
| y |
signal |
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| iflaw |
instantaneous frequency law |
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Example
z=amgauss(128,50,30).*fmconst(128,0.05,50);
plot(real(z));
represents the real part of a complex sinusoid of normalized frequency 0.05, centered at t0=50, and with a gaussian amplitude modulation
maximum at t=t0.
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See Also
fmlin, fmsin, fmodany, fmhyp, fmpar, fmpower.
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Eric Chassande-Mottin
2005-10-26
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