摘要
研制多脉冲激光雷达目标信号模拟器,用以评估回波数字信号处理算法及其实现平台的性能。首先,介绍了目标信号的主要组成以及回波信噪比的两种定义。接着,基于激光雷达方程及1.064μm激光器的辐射激光的光电接收实验,获取信号波形并对目标回波信号组成进行分析,结合空中目标的回波脉冲展宽建立了机载脉冲激光雷达目标回波信号模型。之后,提出了依据电压信噪比产生回波观测信号的方法。最后,给出了基于"FPGA+高速D/A+USB2.0数据传输"的目标信号模拟器软硬件实现,可为回波信号处理器提供信噪比为1-9的静、动目标回波及主波信号。
The airborne multi-pulse LADAR target signal simulator was studied based on signal model to evaluate the performance of laser echo signal processing algorithms and their digital hardware platform. Firstly, the main elements of target signal model and two definition of SNR were pointed out. Subsequently, based on the ladar equation and 1.064μm laser radiation photoelectric receiver experiment, the signal waveform was obtained and the target signal composition was analized. The echo signal model was further established by the analysis of air target echo pulse broadening. Then, the method to generate echo signal according to SNR was proposed based on the RMS value standardization of echo noise samples. Finally, the implement of target signal simulator was given based on FPGA and high-speed D/A and USB2.0 data transmission, which could provide the echo signal and sync-signal of static and dynamic targets with the SNR of 1-9.
出处
《红外与激光工程》
EI
CSCD
北大核心
2012年第8期2068-2072,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(61071211
70971120)
光电控制技术重点实验室和航空科学基金联合资助项目(20105155003)
关键词
回波信号处理
多脉冲激光雷达
信噪比
回波信号模拟
echo signal processing
multi-pulse LADAR
signal to noise ratio
echo signal simulation
