Cepstral prediction analysis of the signal pathway in an ultrasonic A-scan

Digital deconvolution of ultrasonic echo signals improves resolution and th e quality of ultrasonic images. The Homomorphic deconvolution technique und er noisy conditions is applied to simulation results in an ultrasonic pulse -echo amplitude scan line. The simulation includes radiation coupling and t ransducer response, as well as frequency-dependent absorption in the field medium. An accurate method of estimating the pulse-shaping effects of the t ransducer and the test medium are developed by using Homomorphic filtering. Experimental results are given which confirm the modelling. (C) 2000 Acade mic Press.