基于序列信息圆心拟合的大气激光光斑检测技术  

Study of Technique of Spot Detection Based on Sequence Information Fit Circle Center

作　　者：母一宁[1] 温冠宇[1] 王贺[1] 蒋正英[1] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《空军工程大学学报（自然科学版）》2011年第1期59-63,共5页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家"863"计划资助项目(2003AA712014)

摘　　要：为了降低大气湍流对水平链路无线激光通信APT子系统的影响,提高在强噪声中光斑检测算法的鲁棒性,提出了一种新颖的光斑检测跟踪方法。该方法采用序列间信息量的分布情况作为检测特征参数来拟合圆心,并且按照拟合方程估计光斑能量中心点,即在遵守最小二乘原则的前提下使序列间均方误差达到最小。本检测方法可以对大气湍流和背景光干扰起到较强的补偿作用,将检测误差有效地抑制在一个小范围内,对强湍流环境拥有很强的针对性,为水平链路无线激光通信的精跟踪提供了一种针对大气湍流的有效解决方案。该算法采用时域均衡的方法较为巧妙地回避开湍流引入噪声过强这一难题,使其在强噪声环境下拥有较强的鲁棒性。并且从工程实践的角度,较全面地分析了该算法的优缺点,并针对其瓶颈作出了展望。This paper proposes a new method of spot detection and tracking for the sake of reducing the effect of atmospheric turbulence on the level of atmospheric wireless laser communication link APT subsystem and enhancing the robustness of spot detection algorithm in strong noise.In this method the sequence information distributions are adopted as the detection and tracking characteristic parameters to fit the circle centre and estimate the spot energy centre according to the fitting equation,i.e.to make the MSE minimum by following the principles of the least squares.The use of this method can play a strong role in compensating the obstruction of atmospheric turbulence and background to effectively restrain the detection error in a small range,and has a strong aim at the strong turbulence environment,which provides an effective solution to the atmospheric turbulence for the level of wireless laser communication link.In this method the equalization time-domain means with robustness is used to avoid the difficult problem of over-strong noise led into by the turbulence.This paper performs an analysis of the advantages and disadvantages of this method from the perspective of engineering and at the same time makes a prospect for the bottlenecks.

关 键 词：光斑检测 序列信息 圆心拟合 

分 类 号：TN929.1[电子电信—通信与信息系统]