激光水下探测光尾流回波信号提取方法的研究

激光应用于水下目标探测时，受水体后向散射的影响，目标信号被强噪声信号所淹没。针对这一问题，采用基于RLS算法的自适应抵消法对水体后向散射回波信号进行抑制。并根据水下探测信号非平稳的特点，在传统RLS算法的基础上引入可变遗忘因子λ，改善对目标信号的快速跟踪能力。对实验数据进行分析表明，该方法可以有效抑制水体后向散射回波信号，并具有较快的收敛速度和跟踪速度，对水下激光探测的应用具有一定的实际意义。

Study on laser underwater light of bubbles signal detections extraction technology

When detecting underwater target by using laser,the useless backscattering envelope is much stronger than the useful target-reflected signal which makes signal detecting and processing very difficult.In terms of this problem,an adaptive interference canceling method use RLS algorithm has to be found to eliminate the useless backscattering envelope.Based on this method,we proposed a variable forgetting factor to measuring time-varying parameters.It increases the tracking performance in the non-stationary environment.By applying this method to measured data,the water backscattering noise can be effective eliminated and the object signal can be extracted,and has high tracking velocity,which is of much practical significance to underwater target detection.