Analysis on Transition Characteristics of Echoes from Submarine Based on Highlight Model

Transition characteristics of echoes from submarine are essential in studying submarine detection and acoustic countermeasure. Calculating echo strength from an underwater target versus distance is an effective method for analyz-ing transition characteristics of echoes from underwater targets. Theoretical analyses and experiments have shown that under high frequency, echo from any complex target can be considered a coherent superposition of waves from high-lights. A novel algorithm is presented in this paper based on a highlight model to calculate the submarine echo strength in different distance, and to analyze the transition characteristics of echoes from a submarine. Simulation results show that the proposed method is simpler and more efficient compared with the planar element method.