基于最大熵谱估计的回波信号检测技术研究

Research on Echo Signal Detection Technology Based on Maximum Entropy Spectral Estimation

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。

Maximum entropy spectral estimation and LMS adaptive algorithm were proposed to extract the reflection echo signal of laser ranging system.The theory of the maximum entropy spectra estimation was researched,the Burg algorithm was used to obtain correlative parameters of model,and LMS filter was designed to extract useful signal from weak echo signal.The applications of Burg maximum entropy spectral estimation were analyzed in echo signal detection of laser ranging system.Simluation results show that the maximum entropy spectral estimation and LMS adaptive algorithm can extract echo signal of laser ranging system effectively from background noises.