IEEE Transactions on Automatic Control, Vol.47, No.5, 857-863, 2002
A globally convergent estimator for n-frequencies
In this note, we propose a solution to the well-know problem of ensuring a simultaneous globally convergent online estimation of the state and the frequencies of a sinusoid signal composed of n sinusoidal terms. We present an estimator which guarantees global boundedness and convergence of the state and frequencies estimation for all initial conditions and frequencies values.