MMSE ESTIMATION OF NONLINEAR PARAMETERS OF MULTIPLE LINEAR QUADRATIC CHIRPS/

An iterative algorithm similar to our MMSE estimation procedure propos ed in another paper by the authors is applied to parameter estimation of multiple superimposed chirp signals in white Gaussian noise, The ne cessary parameter initializations of the procedure are accomplished by peak detections in the Choi-Williams time-frequency distribution of t he data followed by application of the least-squares principle. A comp arison between our scheme and the alternating projection (AP) method i s demonstrated by computer simulation.