Target Detection of Optimum Frequencies Selection Based on Time Reversal

Target detection based on time reversal has been studied for many years, but these researches paied a little attention to the characteristics of target frequency response. In this paper, we propose a method to select optimum frequencies based on time reversal. After time reversal, there always be some frequency points that lead to the amplitude of time reversal signal higher than conventional signal, while other frequency points are opposite. We extract signal data of these special frequency points to detect the target. And we consider two scenarios that the target response is known or unknown. The extracted data is used in binary hypothesis test of target detection. Although the number of points by optimum frequencies selection is less than the non-selection, the detection probability is significantly higher than non-selection.