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A Flash LiDAR with SA-Based Pulse Position Modulation for Multi-user Interference Cancellation
- Yeo, Jundong;
- Park, Seong hyeok;
- Hong, Yun ji;
- Choi, Jae hyuk;
- Chun, Jung Hoon;
- ... Kim, Seong Jin
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0초록
This paper presents a flash LiDAR system based on successive approximation (SA) in-pixel histogramming time-to-digital converter (hTDC) featuring pulse position modulation (PPM) to suppress interference from other light sources. The pulse position is randomly shifted with the start time of the hTDC, spreading out interference equally to both bins and canceling it by the up-down counting with no demodulation process. The PPM modulator is implemented in an FPGA with a flash LiDAR sensor and is fully characterized. The proposed SA-based PPM successfully attenuates 16-fold larger interference than the user's optical power, achieving a frame rate of 30 fps and a success rate of 99.9% at the same time. © 2025 IEEE.
키워드
direct Time-of-Flight; histogram; LiDAR; multi-user interference; pulse position modulation; successive approximation; time-to-digital converter
- 제목
- A Flash LiDAR with SA-Based Pulse Position Modulation for Multi-user Interference Cancellation
- 저자
- Yeo, Jundong; Park, Seong hyeok; Hong, Yun ji; Choi, Jae hyuk; Chun, Jung Hoon; Kim, Seong Jin
- 발행일
- 2025
- 유형
- Proceedings Paper
- 저널명
- Proceedings - IEEE International Symposium on Circuits and Systems