Signal-to-Noise Ratio and Bandwidth for Pseudo-Random Codes in an Ultrasonic Imaging System
Won K. Kim, Song Bai Park, Steven A. Johnson · Ultrasonic Imaging · 1984
Signal-to-noise ratio and image resolution in an ultrasonic imaging system are compared for four kinds of excitation signals, namely, a single pulse, an unmodulated pseudo-random code, a modulated pseudo-random code and a deconvolved pseudo-random code, all for a given length and amplitude. It was predicted and found from measurements that the best S/N and resolution are obtainable with the deconvolved pseudo-random code.