Optimal Center-Frequency Estimation for Back-Scattered Ultrasound Pulses

Abstract

Absfmcf-Bounds on the accuracy of estimates of the center frequency of an ultrasound signal are considered. In particular the Cramer-Rao lower bound to the variance of any unbiased estimatnr is calculated. This lower bound is then compared with a simple zero-counting method. An example utilizing typical ultrasound parameters is worked. It is shown that this easily computable estimator performs surprisingly well.