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本文分析了普通脉冲激光测距接收机的原理，并指出了它运用在机载激光扫描测距时存在的问题。针对激光束扫描时倾角变化带来的回波脉冲幅度和宽度的变化，提出运用滤波器带宽自动控制技术来改善输出信噪比，运用自动修正恒比定时触发技术提高测距精度。实验结果证实，改善效果是明显的。
This paper analyzes the principle of ordinary pulsed laser ranging receiver, and points out its problems in airborne laser scanning and ranging. Aiming at the change of amplitude and width of echo pulse caused by the change of inclination during laser beam scanning, this paper proposes that the automatic control of filter bandwidth be used to improve the output signal-to-noise ratio and the automatic correction constant ratio timing triggering technique is used to improve the accuracy of ranging. The experimental results confirm that the improvement effect is obvious.