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提出了最大熵谱估计和LMS自适应算法提取激光测距系统的反射回波信号。研究了最大熵谱估计的信号检测原理,采用Burg算法求取AR模型相关参数,设计LMS自适应滤波器提取回波信号,并分析了Burg最大熵谱估计在激光测距系统回波信号检测中的应用。仿真分析表明,最大熵谱估计和LMS自适应算法相结合可以有效地从背景噪声中提取有用的激光反射回波信号。
The maximum entropy spectrum estimation and LMS adaptive algorithm are proposed to extract the reflected echo signals of the laser ranging system. The principle of signal detection for maximum entropy spectrum estimation is studied. The relevant parameters of AR model are calculated by Burg algorithm. The LMS adaptive filter is designed to extract the echo signals. The maximum entropy spectrum estimation of Burg is analyzed in the echo signal detection of laser ranging system Applications. Simulation analysis shows that the combination of maximum entropy spectrum estimation and LMS adaptive algorithm can effectively extract useful laser reflection echo signals from background noise.