三脉冲激光雷达的目标检测

Target detection in three pulse laser radar

讨论了如何利用数字信号处理技术提高激光雷达的目标探测能力。采用三脉冲累加技术提高信噪比1．732倍。根据三脉冲激光雷达回波信号的特点，对信号进行差分滤波和匹配滤波处理，信噪比提高约1．5倍；根据目标的相关性采用多帧相关检测对目标进行检测，通过多次的匹配，检测概率增加，虚警概率降低。外场实验结果表明，三脉冲数字激光雷达的成力大大提高，最小可检测信噪比为1．5，迎头截获距离可提高约2-3倍。

This paper discussed how to use digital signal processing technology to improve the laser radar＇s target detection ability. Three pulses laser radar is developed and three pulses accumulation can improve the Signal-Noise Ratio （SNR） about 1.732 multiple. According to laser radar echo characteristic, the difference filter and the match filter were adopted. As a result, the SNR is advanced about 1.5 times. On the basis of the target correlation, multi-frame relative detection was introduced. Through several matches, the detection probability increased with the false probability decreasing. Field experimental results show that the might of three pulse laser radar has been improved greatly, the smallest detectable SNR is 1.5, and the head-on intercept and capture distance can be improved about 2-3 times.