精密激光测距弱小回波信号自适应滤波方法

Adaptive Filtering Method for Weak Echo Signal in Precision Laser Ranging

由于激光测距信号中存在着大量的噪声,导致精密激光测距精度降低,因此,提出了一种精密激光测距弱小回波信号自适应滤波方法。以弱小回波信号接收模型为基础,计算噪声评价指标,制定自适应滤波程序。应用拉格朗日乘数法制定参数优化规则,确定最佳自适应滤波参数,并将其代入自适应滤波程序中,获得准确的弱小回波信号,实现精准测距的目的。实验结果表明,该方法具有较好的应用性能。

Due to the presence of a large amount of noise in the laser ranging signal,the accuracy of precision laser ranging is reduced.Therefore,an adaptive filtering method for weak echo signals in precision laser ranging is proposed.Based on the construction of a weak echo signal reception model,calculate noise evaluation indicators and develop an adaptive filtering program.By applying the Lagrange multiplier method,parameter optimization rules are formulated and the optimal adaptive filtering parameters are determined.And those parameters are substituted into the adaptive filtering program to obtain accurate weak echo signals,achieving the goal of accurate ranging.The experimental results show that this method has good application performance.