Abstract:Ship’s seismic wave is a new type of ship’ s physical field. Aiming at the problem of ship target detection by ship’s seismic wave signal, a practical real-time time-frequency detection algorithm of constant false alarm probability with less computation is proposed. Firstly, the detection performance of algorithm is deduced theoretically, and the algorithm only involves FFT transform and some simple discriminant operations, which can be run in real time on the STM32 microcontroller. The result tested from simulation signal aspect and measured data aspect shows that, despite the small amount of computation, the algorithm is still efficient in remote target detection. Finally, the decision-making algorithm for identifying the target is designed to determine the time of warning and confirmation.
