激光与光电子学进展, 2017, 54 (2): 020101, 网络出版: 2017-02-10
基于功率谱的高精度大气湍流相位屏的快速模拟 下载: 768次
Fast Simulation for High Precision Atmospheric Turbulence Phase Screen Based on Power Spectrum
大气光学 大气湍流相位屏 功率谱 非均匀采样 图形处理单元 atmospheric optics atmospheric turbulence phase screen power spectrum non-uniform sampling graphics processing unit
摘要
分析了基于非均匀采样功率谱反演大气湍流相位屏的算法, 该算法可进行并行处理, 并引入图形处理单元(GPU), 在不影响模拟精度的前提下有效提高了相位屏的模拟速度。利用Kolmogorov功率谱, 基于GPU技术生成大气湍流相位屏; 对相位屏的模拟精度、模拟速度和误差进行统计分析, 并与理论值进行比较。结果表明利用GPU技术模拟的大气湍流相位屏与理论值非常吻合, 具有很高的模拟速度和精度, 大幅提高了大气湍流相位屏的生成速度。
Abstract
An algorithm of inverting atmospheric turbulence phase screen based on non-uniform sampling power spectrum is analyzed. Parallel progressing can be realized in the algorithm, and a graphics processing unit (GPU) is introduced. The speed of phase screen simulation can be effectively improved without affecting the simulation precision. Atmospheric turbulence phase screen is generated based on GPU technique while the Kolmogorov power spectrum is used. The simulation accuracy, simulation speed and error of phase screen are statistically analyzed and compared with theoretical values. Results show that the atmospheric turbulence phase screen simulated by GPU technique is consistent with the theoretical value, and has high simulation speed and high simulation precision. The generation speed of atmospheric turbulence phase screen is greatly improved.
张智露, 蔡冬梅, 贾鹏, 韦宏艳. 基于功率谱的高精度大气湍流相位屏的快速模拟[J]. 激光与光电子学进展, 2017, 54(2): 020101. Zhang Zhilu, Cai Dongmei, Jia Peng, Wei Hongyan. Fast Simulation for High Precision Atmospheric Turbulence Phase Screen Based on Power Spectrum[J]. Laser & Optoelectronics Progress, 2017, 54(2): 020101.