Error analysis of the underwater imaging method using focused beamforming

The method of measuring underwater image by focused beamforming can be used for passive localization in short range.It is sure that many kinds of errors exist in the process of receiving data or carrying out data processing with this method.From the analysis of focusing apex scale,the influences of array element deviation,distance and wavelength on the underwater imaging method using focused beamforming are discussed in this paper.Simulation study and experimental data analysis indicate that the locating precision of this imaging method is sensitive to distance and wavelength,but not so to the array element position.Therefore the focused beam-forming technique can realize high precision localization in short range.