Detection and Location of Linear and Nonlinear Targets using PI-DORT and Time-of-Flight

This paper outlines the use of PI-DORT with a time-of-flight algorithm for added robustness in detection and location of linear and nonlinear targets. DORT (French acronym for Decomposition of the Time Reversal Operator) allows for separation of multiple targets in multistatic detection. Pulse inversion (PI) has recently been used together with DORT to allow nonlinear scatterers to be discriminated from linear scatterers. In this paper, the resulting technique, PI-DORT, is augmented with a time-of-flight algorithm to improve the robustness of target location in a complex multi-target environment involving linear and nonlinear targets. The proposed method presents an integrated approach that combines PI-DORT and radar time-of-flight principles to localize individual targets with significantly reduced computational time.