An improved algorithm for sinewave parameter estimation

A sinewave can be completely characterized by its four parameters: amplitude, DC offset, frequency, and phase. The authors document an improved algorithm for estimating the four parameters from a digitized data record. This new algorithm is noniterative and utilizes a linear technique which improves the accuracy of parameter estimates over existing nonlinear methods. This algorithm performs reliably even when the input sinewave is corrupted by various levels of noise distortion similiar to those presented in the output of typical waveform digitizers. Results of simulations verify that the proposed method shows consistent improvement over a broad range of both linear and nonlinear distortion levels