一种水下有源噪声抵消系统的设计

潜艇的自噪声是影响潜艇被动声纳系统性能的重要因素。对接收信号中的潜艇自噪声进行有源抵消,从而可提高被动声纳的作用距离。该文设计了一个针对舰艇艏端被动声纳平台的本艇自噪声有源抵消系统,并设计了其试验系统方案。采用直接-并联型结构的多通道有源陷波器和滤波最小均方误差算法(FXLMS)自适应滤波算法,有效地抑制了潜艇自噪声中的线谱分量,提高了接收端的输入信噪比,提高了被动声纳作用距离。

Design of Underwater Acoustic Active Noise Cancellation System

Submarine noise is the important factor affecting the passive sonar system's performance.The role range of the passive sonar can be enhanced by canceling the submarine noise from receiving signal.An underwater acoustic active noise cancellation system was designed based on a passive sonar platform fixed in submarine's bow.The experiment method of this system was also designed.Multi-channel active notch filter with direct-parallel structure and FXLMS adaptive algorithm were adopted in this system.Thus,the line spectram component of submarine noise was effectively canceled,the input signal-to-noise ratio in the receiver was enhanced,and the role range of passive sonar was improved.