Rapid Laser Ranging Method for Compact LiDAR Systems
2025
Jiahui Guo | Bo Gao | Xiaojun Liu | Junya Wang | Zheng You
We propose a rapid laser ranging method for compact LiDAR systems. It employs a high signal-to-noise ratio (SNR) coherent detection scheme to minimize the required measurement integration time, while also addressing key challenges encountered by existing rapid coherent ranging methods in compact systems&mdash:namely, device fabrication difficulties, the complexity of parallel Doppler frequency shift (DFS) decoupling, and endpoint effect elimination&mdash:through low-depth pseudo-random phase modulation (LD-PRPM). Furthermore, it introduces sliding window analysis, which fully harnesses the advantages of continuous-wave measurement and further boosts the ranging rate. In addition, the proposed method is adaptive and resistant to interference. Analysis and experiments validate its effectiveness. In the experiments, the method demonstrated a ranging accuracy of 5 mm, a ranging precision of 2 mm (1&sigma:), and a rapid ranging rate of 10 MHz. These results may offer valuable references for enhancing the temporal or spatial resolution of the compact LiDAR system.
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