Fig. 1. Round-trip of phased laser ranging signals

Fig. 2. Schematic diagram of phase laser ranging system

Fig. 3. Undersampling and normal sampling phase discrimination error under different phase differences with signal frequency of 201M

Fig. 4. Phase discrimination error of FFT and apFFT methods under different phase differences and calculation points

Fig. 5. Comparison of phase detection error of two phase detection methods with different signal-to-noise ratios

Fig. 6. Phase detection error of two phase detection methods at different frequency offsets

Fig. 7. Phase discrimination errors of FFT and apFFT under actual sampling signals

Fig. 8. Block diagram of phased laser ranging system

Fig. 9. Optical and phase detection system of high-frequency phase ranging circuit

Fig. 10. Error between measured phase difference and actual phase difference

Fig. 11. Measurement standard deviation of different phase differences