多脉冲激光测距信号的数字相关检测技术研究

Digital Correlation Detection of Multi-pulse Laser Ranging

针对激光测距中回波信号信噪比低、难以提取的困难,论文分析了多脉冲激光测距回波信号叠加技术和相关检测技术对于信噪比的提升作用,并对此进行了实验。实验结果表明,对比15组脉冲激光测距,采用30组脉冲激光测距时,回波信号信噪比增加了1.38倍,采用数字相关检测技术处理后,回波信号信噪比增加了3.07倍。这表明,多脉冲激光测距回波信号叠加和相关检测技术,均可以提升激光测距回波信号的信噪比。

As the SNR of laser ranging echo signal is low and difficult to recognize,this paper analyzes the SNR enhancement by multi-pulse accumulation and correlation detection and conducts experiments later.The experiments result shows that when comparing with echo signal SNR of 15 groups pulsed laser ranging,the echo signal SNR of 30 groups pulsed laser ranging increased it to 1.38 times,and when using digital correlation detection process,the echo signal SNR increased to3.07 times.This indicates that the multi-pulse laser ranging and correlation detection technology can both enhance the SNR of laser ranging echo signal.