On the design of a transversal filter bank for parallel processing multiple image lines in real-time acoustic imaging

PROCESSING MULTIPLE IMAGE LINES IN REAL-TIME ACOUSTIC IMAGING Jian Shen Emad S. Ebbini Department of Electrical Engineering and Computer Science The University of Michigan, Ann Arbor, MI 48109, USA Tel : (313) 764-4121 Fax : (313) 936-1905 e-mail : [email protected], [email protected] ABSTRACT We present a new method for designing a transversal lter bank for parallel processing echo data in real-time active acoustic imaging. The method is based on a discretized linear spatio-temporal formulation of an imaging system which uses transmitter arrays with coded-excitation. The lter coe cients are derived from a pseudo-inverse operator which not only decouples echoes from di erent image lines, but also provides pulse compression along the range direction. The new method, together with the proposed coded-excitation imaging modality, may nd many applications in SONAR, NDE and biomedical imaging areas.