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griffitc

Test signal example C of Griffiths' paper

Calling Sequence

[SIG,IFLAWS] = griffitc(N)
[SIG,IFLAWS] = griffitc(N, SNR)

Parameters

N :

a positive integer: number of points in time of the signal (default: 200)

SNR :

a positive scalar: the signal to noise ratio (default: 25 dB).

SIG :

a complex column vector of size N: the signal.

IFLAWS :

a N by 3 real array : the instantaneous frequencies of the 3 components .

Description

griffitc generates the test signal of the example C of the paper of Griffiths.

Examples

[sig,iflaws] = griffitc(); 
plot(iflaws); xgrid;
xlabel(_("Time"));
ylabel(_("Normalized frequency"))
xtitle(_("Instantaneous frequency laws"))

References

L.J. Griffiths, "Rapid measurement of digital instantaneous frequency", IEEE Trans on ASSP, Vol 23, No 2, pp 207-222, 1975.

Authors


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