湍流大气中孔径平均对有效信噪比的影响分析

摘要

Beginning with aperture averaging effect, the paper constructs effective SNR model in the Gaussian-beam environment and introduces aperture averaging model in detail combined with aperture averaging factor of the model. The variation tendency of effective SNR with aperture size under the condition of different turbulence intensity is analyzed through the simulation experiment, and the results show that as aperture size is increased, effective SNR is also raised and aperture averaging effect can effectively restrain the influence of turbulence on communication system.%从孔径平均效应出发,首先建立高斯光束条件下的有效信噪比模型,并结合模型中的孔径平均因子,详细介绍了高斯光束下的孔径平均效应模型,在此基础上,通过仿真实验对比分析:了不同湍流强度下有效信噪比随孔径尺寸的变化趋势,结果发现:随着孔径尺寸的不断增加,有效信噪比逐渐变大,说明孔径平均效应可以有效抑制大气湍流对通信系统的影响.