雾天微弱激光回波信号增强与处理研究

研究了雾天多脉冲信号累积增强原理和方法，并利用多脉冲累积增强原理对激光回波信号进行处理。为了提取微弱激光回波信号的特征，研究了匹配滤波处理算法，并分别就原始回波信号和多脉冲累积增强信号进行了匹配滤波处理，大大提高了信号的信噪比。实验结果表明：4个独立激光回波信号进行累积处理的结果使得回波信号的信噪比增强了2倍；多脉冲累积可以有效地提高回波信号的信噪比，而匹配滤波在提高信号信噪比的同时抑制了噪声。

Research on the Enhancement and Processing of Weak Laser Signal in Foggy Conditions

For the echo of the laser signal is relatively weak and accompanied by a lot of noise in fog condition ,a multi-pulse cumulative method for enhancing weak laser signal was proposed .The en-hancement principle and method of multi-pulse signal accumulation was studied ,and with it the weak signal was processed .The matched filter algorithm was used to extract the characteristics of laser ech-osignal ,the original signal and the cumulative signal was processed by the matched filter ,respective-ly ,which greatly improves the signal to noise ratio .The experimental results show that ：four sepa-rate laser signals accumulated together enhancement the signal to noise ratio 2-fold ;the accumulation of multi-pulse laser signal can effectively improve the signal to noise ratio ,and the matched filter can improve signal to noise ratio while suppressing noise .