Algorithm for Determination of Resonance Lorentzian Curve Parameters

A simple and reliable approach for determining initial parameters in the problem of resonance Lorentzian curve approximation has been suggested. The algorithm has been applied to experimental data and its validity is shown. The results of iterative approximation with initial parameters that are found using proposed algorithm have been compared with those of approximation by the well-known Circle Fit algorithm. The suggested approach makes it possible to reduce signal-to-noise ratio requirements without loss of approximation reliability.