激光测高仪不仅可以精确测量目标的距离，还能够从回波信号中提取倾斜度、粗糙度等特征信息，应用十分广泛。通过对测高系统中信号检测单元分析，采用匹配滤波对回波信号进行处理，达到了理想的滤波效果，这对特征信号的提取和提高系统的探测精度起到了关键的作用。

Laser altimeter not only can precisely measure the target distance, but also extract characteristic information, such as inclination, roughness etc. from its echo signals. So they are applied widely. The signal detection unit of the system is analyzed with matching filters to process the echo signals with idealized results, which plays an important role to the extraction of characteristic signals and the improvement of detection precision.