基于近场聚焦逆波束形成的UUV平台噪声自适应抵消

UUV平台自噪声会对舷侧阵产生干扰，从而影响其探测性能，本文针对平台尾部自噪声源的直达噪声和海面反射噪声，提出了基于近场聚焦逆波束形成的平台噪声自适应抵消方法。文中利用UUV平台设计参数、深度以及运动姿态信息对尾部自噪声传播到舷侧阵的路径建立几何模型，并分析了影响该路径的因素；通过该模型，平台尾部自噪声能够实时自适应地通过聚焦波束形成被估计出来，从而在舷侧阵的接收信号中实现干扰抵消。仿真结果与海试实验数据处理结果表明，该方法能够有效抑制尾部自噪声干扰，显著提高UUV探测弱目标的能力。

Adaptive cancellation of UUV self-noise based on the inverse focusing beamforming in near field

UUV self-noise interferes with the side array seriously, and makes against detection. Aiming at the direct noise and the reflected noise by sea level of the stern noise source, an adaptive noise cancellation method based on focusing inverse beamforming is proposed. This paper built a geometric model for the path of noise propagation from the tail to the side array, combining the information of design parameters of the structure, depth of navigation and motion attitude of the UUV, and the factors that influence the path are analyzed. According to this model, the tail noise can be estimated by focusing inverse beamforming, and it could be removed from the received signal of side array in real-time and adaptively. The results of simulation and the data processing in the sea trial experiment show that our method can cancel the self-noise effectively and improve the ability of detection for the weak targets significantly.