自适应噪声抵消技术的应用研究与仿真

Research and Simulation of Adaptive Noise Cancelling Technique

从噪声中分离有用信号是信号处理领域一个非常重要的课题。传统的滤波方法对于淹没于强干扰噪声背景下的有用信号提取已经不适用,而自适应滤波技术以其原理清楚,可实现性强而具有很强的应用价值。随着自适应技术的发展,自适应本舰噪声抵消技术已成为舰载声纳的信号处理技术中重要的研究课题之一。通过对自适应噪声抵消器原理的研究,结合舰载声纳信噪模型分析,重点研究利用自适应噪声抵消技术从舰载声呐在本舰强噪声干扰背景下提取有用信号的技术,并运用MATLAB进行了仿真试验。仿真结果表明自适应噪声抵消技术可以有效抵消本舰发出的强噪声,从而抑制本舰噪声对舰载声呐的干扰。

In the field of Signal Processing, the problem of separating the available signal from the noise is very important. Traditional method of wave filtration is not suitable for separating available signal from strong noise background. The technique of adaptive wave filtration is practical because of its clear theory and easy realization. With the development of adaptive technique, adaptive ship noise cancelling technique becomes one of the important research fields for the signal processing of the sonar equipped on ship. This article mainly researches the technique of separating the available signal from the strong ship noise background, and simulates it by using MATLAB. The results of simulation show that adaptive noise cancelling techniques could cancel the strong noise generated by the ship to restrain the noise from disturbing the sonar.