Automatic Separation of Multiple Backscattering from Concave Targets Based on Ray Tracing Using Complex Exponential Model

A novel automatic separation technique of backscattered fields with different reflection times is proposed in order to reduce artifacts when imaging complex concave structures. This technique serves as a data preprocessing for achieving accurate reconstruction of concave objects. The complex exponential model is applied to separate the entire scattering signal into several components, which are then matched based on ray tracing according to their respective reflection times. The effectivity of the proposed approach is validated through simulation results involving diverse concave structures.