光圈(计算机存储器)
物理
光学
振幅
信号(编程语言)
相(物质)
信噪比(成像)
激光雷达
合成孔径雷达
声学
遥感
计算机科学
地质学
量子力学
程序设计语言
作者
Hai Sheng Cong,Jianfeng Sun,Zhou Lu,Hongyu He,Ronglei Han,Weijie Ren,Longkun Zhang,Yuxin Jiang,Chaoyang Li
摘要
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 μx is equal to - σ2x , 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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