Hengheng Liang, Xichen Wang, Yonglong Chen, Junan Zhang, Yingke Xie. Anti-Interference Performance Analysis of Modulated Light Detection and Ranging Using Code Division Multiple Access[J]. Laser & Optoelectronics Progress, 2022, 59(12): 1228005
- Laser & Optoelectronics Progress
- Vol. 59, Issue 12, 1228005 (2022)
Fig. 1. Schematic of CDMA modulated LiDAR
Fig. 2. Correlation characteristics of different code sets. (a) m codes; (b) PC codes; (c) OOC codes
Fig. 3. Variation of false alarm rates corresponding to each code group with SNR
Fig. 4. Simulation result of ranging without interference. (a) Echo signal; (b) correlation result of C3 code and echo signal
Fig. 5. Simulation of legacy single pulse LiDAR interfering. (a) Received signal; (b) result of threshold detection; (c) slide correlation result of C3 code
Fig. 6. Simulation of CDMA modulated Lidar interfering. (a) Received signal; (b) result of threshold detection; (c) slide correlation result of C3 code
Fig. 7. FMCW signal and CDMA signal of equal power. (a) FMCW LiDAR signal; (b) CDMA modulated LiDAR signal
Fig. 8. Simulation of FMCW Lidar interfering. (a) Received signal; (b) result of threshold detection; (c) slide correlation result of C3 code
Fig. 9. Interference results under different FMCW signals. (a) Interference results of FMCW signals with different center frequencies; (b) interference results of FMCW signals with different frequency modulation slopes
Fig. 10. Simulation of densely pulses interfering. (a) Received signal; (b) result of threshold detection; (c) slide correlation result of C3 code
Fig. 11. Variation of correlation peak ratio under different density interference
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Table 1. Orthogonal code sets
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Table 2. Simulation specifications of CDMA modulated LiDAR
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