Integrated Detection Method of Active Underwater Acoustic Fuze Echo

To accurately detect active underwater acoustic fuze in complicated natural interferences, a novel integrated detection method is proposed. In this method, macro- and micro-features of target echo signals and interferences (such as reverberation) are analyzed; the intrinsic mode functions (IMFs) from original signals received by fuze system are achieved via the improved empirical mode decomposition(EMD) approach to separate the target echo signal from the reverberation; and the statistics of variance of instantaneous frequency detection and energy detection are obtained from IMFs and are combined to form an integrated detector for optimally detecting underwater acoustic fuze. Lake tests indicate that the proposed method exhibits better performance in underwater acoustic fuze detection, compared with such commonly used detection methods as energy detection method and variance of instantaneous frequency de-tection method.