Analysis of Marine Sensor Signals in Fast Time Domain Processing

Synthetic aperture sonar (SAS), a new emerging marine system and an enabling technology, is based on storing successive snapshots of the target's scene and processing the collected data. Advancing the speed and robustness of image reconstruction is greatly desired, this paper describes imaging algorithm, computation time and image signal to noise ratio. It gives an introduction to the time domain beamforming (TDB) and aperture processing. We initially look at the fundamental processing constraints that limit the frequency domain beamforming(FDB) technique. TDB technique has been successfully used instronomy, satellite, aircraft borne radar and used for AUV based mine hunting and numerous other applications. Its resolution is independent of range, which making available a wide signal processing trade-space. During the past few years, we have been applying synthetic aperture processing techniques to sonar. In this study, the use of TDB is investigated and concluded that it is very effective in removing the effects and restoring the focus of images. The algorithms can be outlined using the MATLAB.