Yaqing Zhu, Rongyi Ji, Dengfeng Dong, Weihu Zhou. Simulation and implementation of undersampling all-phase FFT phase discrimination method[J]. Infrared and Laser Engineering, 2023, 52(11): 20230119
- Infrared and Laser Engineering
- Vol. 52, Issue 11, 20230119 (2023)
Fig. 1. Schematic diagram of phase laser ranging
Fig. 2. Diagram of all phase FFT phase discrimination (N =4)
Fig. 3. Principle block diagram of undersampling apFFT phase detection
Fig. 4. (a) Phase detection performance with different sampling frequency at signal frequency of 201 MHz; (b) Phase detection performance with different sampling frequency at signal frequency of 301 MHz
Fig. 5. Phase discrimination performance under different signal frequencies
Fig. 6. Measurement performance with different SNR
Fig. 7. Measurement performance with frequency offset
Fig. 8. (a) Phase detection performance with various factors of undersampling FFT method; (b) Phase detection performance with various factors of undersampling apFFT method
Fig. 9. (a) Hardware scheme block diagram of under-sampling phase detection system; (b) Actual circuit diagram of undersampling phase discrimination system
Fig. 10. (a) Phase detection accuracy with different white Gaussian noise of FFT methods based on phase discriminator circuit; (b) Phase detection accuracy with different white Gaussian noise of apFFT methods based on phase discriminator circuit
Fig. 11. Phase detection accuracy with different phase differences based on phase discriminator circuit
Fig. 12. Experimental system of phase laser ranging
Fig. 13. Phase discrimination results comparison diagram with Kalman filtering or not
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Table 1. Data analysis of measurement results at different distances
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Table 2. Comparison of relevant data from references
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