New insights on Pisarenko's method for sinusoidal frequency estimation

The well known Pisarenko's method for sinusoidal frequency estimation can be considered as a least squares minimization problem subject to a unit-norm constraint. In this paper, a computationally attractive and accurate frequency estimator is devised via applying weighted least squares in the Pisarenko's framework. Simulation results are included to evaluate the estimation performance of the proposed algorithm in different conditions.