Underwater target passive detection method based on Hough transform track-before-detect

Abstract Aiming at the low detectability and concealment detection requirements of underwater targets such as unmanned vehicles (UUV), an target passive method based on Hough transform track-before-detect was proposed. In order to deal with approach reconnaissance UUV, model UUV constructed; obtain position information required for track-before-detect, cross-positioning multiple sonar buoys adopted realize data pre-processing noise reduction before detection; improve performance in complex acoustic environment, point trace correlation were used demand targets. Simulation results show that this can still maintain high probability under conditions signal-to-noise ratio, multi-target noise.