Fig. 1. Clutter signal of the acquisited waveform by the 1 064 nm subnanosecond muti-pulse laser rangefinder

Fig. 2. Schematic diagram of target attitude

Fig. 3. F-22 waveform sequences of different irradiating angles. （a）Outline of the F-22 airplane; （b）Target echo sequence with an incident angle of 60°;（c）Target echo sequence with an incident angle of 30°

Fig. 4. Detected waveform for the same airplane target with homogeneous clutter under the condition of various β and SNR=0.2. （a） Cumulative target signal;（b） Range extended target echo waveform extracted under the Donoho threshold β=1; （c） Range extended target echo waveform extracted under the Donoho threshold β=1.5；（d） Range extended target echo waveform extracted under the Donoho threshold β=2.5