Deep sea weak multi-target depth long-time cumulative estimation method
A technology of accumulation estimation and target depth, which is applied in the fields of hydroacoustic engineering, ocean engineering and sonar technology, and can solve problems such as the inability to effectively achieve long-term coherent accumulation.
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[0113] refer to figure 1 . Underwater acoustic channel modeling: the sound velocity profile of the simulation environment is a typical Munk sound velocity profile, the sea depth of the simulation environment is 5000m, the critical depth is 4000m, the seabed parameters are sound velocity 1650m / s, density 1.62g / cm 3 , the absorption loss is 0.08dB / λ, where λ is the wavelength. The receiving array is a 16-element synchronous vertical line array, the array element spacing is 5m, and the depth of the array center is 4200m.
[0114] refer to figure 2 . Modeling of target movement: the horizontal distance of the three underwater targets from the vertical array is always the same, and they move from far to near at the same time. The depths of the three targets were 15m, 50m and 55m, and remained constant throughout. At 22km (point A) the vertical array detects the target and starts to accumulate the two-dimensional power map; the horizontal distance from the sound source to the ...
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