微波调制激光测速的软件接收机研究  

Research on softwarereceiver for velocitymeasurementusing the microwave modulated laser technologies

作　　者：冯梓宸 徐轻尘 胡雄 FENG Zi-chen;XU Qing-chen;HU Xiong(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《电子设计工程》2019年第1期106-110,共5页Electronic Design Engineering

基　　金：国家重点研发计划资助(2016YFB0501503);中国科学院"十三五"信息化建设专项资助(XXH13505-04-03)

摘　　要：针对传统激光多普勒测速技术的局限性,使用微波调制激光的技术体制,构建了一套基于FPGA的软件接收机,用于微波调制激光测速系统中的信号跟踪,通过测量微波信号的多普勒频移来得出测速结果。使用DDS生成高精度的微波信号作为微波调制激光的信号源,开展了频率跟踪实验。实验结果表明,接收机的测速精度可达8.01×10-4m/s,速度测量范围可达0.008 5 m/s～22.6 km/s,每0.2 s即可获得一个测速结果,实现了高精度,高动态以及快速响应的激光测速。Due to the short range of the traditional laser Doppler velocimeter.A software receiver based on FPGA was constructed using the microwave modulated laser technologies.The receiver was used to obtain the velocity of target by detecting the Doppler shift of microwave signal.Frequency tracking experiments have been carried out,in which aDDS chip in the transmitter was used to generate high precision microwave signal,as the source signal to modulate the laser signal.The results indicated that the uncertainty of velocity measurement can reach 8,01×10^-4m/s.And the measurement range can be up to 0.0085m/s^22.6km/s.Besides,the receiver can obtain a measurement result every 0.2 second.The microwave modulated laser system can achieve high accuracy velocity with high dynamic range and quick response.

关 键 词：微波调制激光 激光测速 软件无线电 FPGA 

分 类 号：TN249[电子电信—物理电子学]