数字相关技术在激光多普勒测速仪中的应用  

The application of digital correlation technology in laser Doppler velocimeter

作　　者：周健[1] 龙兴武[1] 魏国[1] 宋锐[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,长沙410073

出　　处：《激光杂志》2009年第3期28-29,共2页Laser Journal

摘　　要：激光多普勒测速仪在导航系统中将是一种很好的速度传感器,而多普勒信号的处理在整套系统中起着十分关键的作用。本文提出将数字相关技术运用于激光多普勒测速仪的方法,对多普勒信号进行自相关处理,去除噪声干扰。仿真和实验均表明该技术大大提高多普勒信号的信噪比,降低系统对信号信噪比的要求,提高系统的抗噪能力和灵敏度,为设计高精度的激光多普勒测速仪创造了条件。Laser Doppler velocimeter （LDV） will be a good kind of speed sensor, and the processing of Doppler signal plays a very critical role in the whole system. This article proposes a method of applying the digital correlation technology in LDV. Through the processing of self- correlation to Doppler signal, we can eliminate the noise interference. Simulations and experiments indicate that the technology has greatly improved SNR of Doppler signal, reduced system＇s request for SNR of signal improved the noise - proof feature and the sensibility of system.This application creates conditions for the design of high - accuracy LDV.

关 键 词：激光多普勒 数字相关 信噪比 

分 类 号：TN248.1[电子电信—物理电子学]