Research on coherent accumulation of multi-aperture receiver array based on FMCW coherent lidar

Haisheng Cong; Jianfeng Sun; Zhiyong Lu; Hongyu He; Ronglei Han; Weijie Ren; Longkun Zhang; Yuxin Jiang; Chaoyang Li

doi:10.1117/12.2593908

1 August 2021 Research on coherent accumulation of multi-aperture receiver array based on FMCW coherent lidar

Haisheng Cong, Jianfeng Sun, Zhiyong Lu, Hongyu He, Ronglei Han, Weijie Ren, Longkun Zhang, Yuxin Jiang, Chaoyang Li

Proceedings Volume 11831, Infrared Sensors, Devices, and Applications XI; 118310Q (2021) https://doi.org/10.1117/12.2593908
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Conference Poster

Abstract

This article mainly shows that coherent accumulation of multi-aperture receiver array based on frequency modulation continuous wave (FMCW) coherent lidar has an excellent performance for the weak signal detection of target which is far distance or moving with a high velocity. This method can improve the signal and noise ratio (SNR) and detection range accuracy by multi-aperture receiver array. In addition, the analysis done by simulation shows that phase fluctuation of atmospheric turbulence has a significant influence on the performance of coherent accumulation of multi-aperture receiver array. Stimulation result shows that while μ_x is equal to - σ²_x , the amplitude fluctuation of signal could degrade the quality of coherent accumulation based on multi-aperture receiver array and its existence leads to the worse performance before non-amplitude fluctuation. Phase fluctuation of signal deteriorates the performance of coherent accumulation while its size is big or small.

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Citation Download Citation

Haisheng Cong, Jianfeng Sun, Zhiyong Lu, Hongyu He, Ronglei Han, Weijie Ren, Longkun Zhang, Yuxin Jiang, and Chaoyang Li "Research on coherent accumulation of multi-aperture receiver array based on FMCW coherent lidar", Proc. SPIE 11831, Infrared Sensors, Devices, and Applications XI, 118310Q (1 August 2021); https://doi.org/10.1117/12.2593908

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