Precise frequency estimator for noised periodical signals

The frequency estimation technique with guaranteed finite time of convergence to a given accuracy of identification is presented. The approach for a high frequency noise rejection is proposed. The possibility of switching algorithm introduction for estimation quality improvement is discussed. The proposed solution has order three, that is smaller than in other existent solutions. The dimension of modified robust frequency estimator that can reject the additional measuring noise is equal four. Efficiency of the approach is demonstrated on examples of computer simulation.