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大孔径接收是克服大气光通信中大气湍流影响的有效途径之一。在有限孔径接收光强起伏理论基础上,建立了平均信噪比与无湍流影响时的探测器输出信噪比、孔径平均因子以及光强起伏方差之间关系的数学模型,并给出了系统误码率计算公式。通过数值计算得出了在给定误码率(BER)设计指标时,不同大气湍流参数条件下,接收孔径直径与无湍流影响时的探测器输出信噪比之间的关系曲线。
Large aperture receiver is one of the effective ways to overcome the influence of atmospheric turbulence in atmospheric optical communication. On the basis of finite aperture received light intensity fluctuation theory, the mathematical model of the relationship between the average signal-to-noise ratio and the detector output signal-to-noise ratio, aperture average factor and light intensity fluctuation variance is established. The system Error rate calculation formula. The relationship between receiver aperture diameter and detector output signal-to-noise ratio (SNR) under different atmospheric turbulence parameters at a given bit error rate (BER) design index is obtained numerically.