Title :
On nonlinear effects of envelope detection in beamforming systems
Author :
Trucco, Andrea ; Murino, Vittorio
Author_Institution :
Dept. of Biophys. & Electron. Eng., Genoa Univ., Italy
fDate :
7/1/1997 12:00:00 AM
Abstract :
The evaluation of the effects that are due to the square envelope detection performed in an acoustic imaging system is addressed. Envelope detection destroys phase information, producing a nonlinear contribution. The importance of the nonlinear contribution is evaluated by a beam-pattern-like formulation and by several simulations. Generally, a considerable incidence of such nonlinearities has been pointed out.
Keywords :
acoustic imaging; acoustic signal processing; array signal processing; underwater sound; acoustic imaging system; beam-pattern-like formulation; beamforming systems; nonlinear effects; phase information; square envelope detection; Acoustic beams; Acoustic imaging; Acoustic signal detection; Array signal processing; Envelope detectors; Layout; Linearity; Phase detection; Scattering; Signal processing;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
