Title :
Coarray analysis of wideband pulse-echo imaging systems
Author :
Ahmad, Fauzia ; Kassam, Saleem A.
Author_Institution :
Moore Sch. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA
Abstract :
We derive an analytic expression for the point spread function, using the concept of coarrays, for wideband pulse-echo imaging of targets. We analyze the performance of the imaging system under finite and infinite range conditions. The results provide a better understanding of the interplay between bandwidth, element locations, weighting of the elements, pulse shape within the bandwidth, and imaging performance. This leads to new insights on array and pulse design. We support our results through computer simulations
Keywords :
array signal processing; echo; optical transfer function; sonar imaging; sonar signal processing; ultrasonic imaging; underwater sound; Fourier transform; array design; bandwidth; coarray analysis; computer simulations; element locations; elements weighting; finite range conditions; imaging system performance; infinite range conditions; point spread function; pulse design; pulse shape; sonar; ultrasound imaging; wideband pulse-echo imaging systems; Bandwidth; Delay effects; Focusing; Fourier transforms; Image analysis; Layout; Pulse shaping methods; Shape; Transmitters; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.550553
