Sector SONAR resolution enhancement using beam overlapping based on Wiener modeling

Abstract

Many studies about generating images of seabed using active sonar have been carried out but image resolution enhancement is still an important problem. The approaches using narrower beam width are commonly and widely proposed to enhance azimuth resolution. Unfortunately, they have technical limitations to reduce the beam width. Therefore, signal processing techniques are essential to achieving higher azimuth resolution when an array with conventional beam width is employed. This paper proposes a new approach that utilizes overlapped beams based on Wiener filtering to obtain higher resolution. © 2017 IEEE.