基于倒谱分析的脉冲激光测距抗云烟干扰算法  

Anti-interference algorithm of clouds and smog for pulse laser range measurement based on cepstrum analysis

作　　者：周毅刚[1] 王勇[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《红外与激光工程》2011年第9期1677-1681,共5页Infrared and Laser Engineering

摘　　要：针对脉冲激光测距因云烟干扰造成的多径效应而难以准确定位目标回波的问题,介绍了倒谱提取时延的原理,以及利用倒谱技术结合信号积累来定位真实目标回波位置的方法,随后分析讨论了累积次数、混叠因子和输入信噪比对目标定位率的影响,并用蒙特卡罗法统计得到3个影响因子与目标定位率的关系图。针对输入信噪比对目标定位率有较大影响的分析结果,使用小波阈值去噪作为算法的预处理,仿真结果表明加入去噪流程后定位性能得到了一定提升。Aiming at the difficulty of locating target echo when multi-path interference was involved m pulse laser range measurement which was usually caused by clouds and smog, an algorithm using eepstrum technology and signal accumulation was proposed. The principle of time-delay detection using cepstrum technology and the detailed process of the location algorithm was introduced. Then the influence of numbers of accumulation, aliasing factor and received SNR on location rates of target echo was discussed, and the relationship diagrams of these three factors were given by using Monte Carlo method. The statistical results show that the received SNR makes great influence on location rates of target echo. Therefore, wavelet threshold denoising method was used as a pretreatment and the location rates was improved to some extent.

关 键 词：脉冲激光测距 倒谱 信号积累 

分 类 号：TN249[电子电信—物理电子学]