Comparative study of pulse and FMCW laser detection performance in fuzzy environment

Peng Chen; Jiguang Zhao; Yishuo Song; Tianbo Gao

doi:10.1117/12.2533939

17 May 2019 Comparative study of pulse and FMCW laser detection performance in fuzzy environment

Peng Chen, Jiguang Zhao, Yishuo Song, Tianbo Gao

Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 111703N (2019) https://doi.org/10.1117/12.2533939
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China

Abstract

A fuzzy environment such as smoke and dust can cause laser energy attenuation, signal-to-noise ratio reduction, and even false alarms caused by backscatter interference. It seriously affects the performance of the detection system and even makes the system unusable. In order to study the performance variation of pulse and frequency modulated continuous wave (FMCW) laser detection in fuzzy environment, this paper selects the ranging error and the equivalent target peak to backscatter peak ratio (TBR) as the evaluation index, and compares the performance of the two systems in fuzzy environment. The variation of detection performance under different degrees of fuzzy environment is also discussed. The results show that the detection performance of the two systems has different degrees of degradation in the fuzzy environment. In the case of different environmental visibility, the ranging error of the FMCW system is better than the pulse system. When the environmental visibility is high, the TBR of the pulse system is higher than the FMCW. As the visibility decreases, the TBR of the FMCW is gradually higher than the pulse. In comparison, the FMCW's detection performance is better than the pulse system in the case of low visibility, which is more obvious as visibility decreases.

Citation Download Citation

Peng Chen, Jiguang Zhao, Yishuo Song, and Tianbo Gao "Comparative study of pulse and FMCW laser detection performance in fuzzy environment", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111703N (17 May 2019); https://doi.org/10.1117/12.2533939

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