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针对CO_2差分吸收激光告警雷达系统,研究累加平均和匹配滤波两种算法.将两种方法进行耦合,结合了各自的优点,使得激光雷达在小信噪比下工作,提高了检测距离,计算出较远距离时,化学物质的 CL浓度值.将该方法应用到 CO_2差分吸收激光告警雷达系统中。通过仿真实验,能有效地去掉噪声和强干扰信号,在保持原信号特征的情况下,较准确地提取出有效的弱信号,计算出化学物质的浓度距离,模拟出测量到某种化学物质.
Aiming at CO_2 differential absorption laser warning radar system, the two algorithms are studied, which are cumulative averaging and matched filtering.The two methods are combined and their merits are combined to make the laser radar work under a small signal-to-noise ratio to improve the detection distance and calculate For longer distances, the CL concentration of the chemical is applied to the CO 2 differential absorption laser radar system. Through the simulation experiment, the noise and strong interference signal can be effectively removed, and the effective weak signal can be extracted more accurately and the concentration distance of the chemical substance can be calculated while keeping the characteristics of the original signal to simulate the measurement of a certain chemical substance.