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在无线光通信中,通信系统发射的光束通常近似看作平面波或球面波,而实际的发射光束是高斯波束,所以在研究通信系统性能指标时必然会存在差异。运用理论分析和实验仿真的方法,在不考虑湍流内、外尺度影响和弱湍流的前提下,对比分析了平面波、球面波以及高斯光束模型条件下孔径平均效应的差异。在此基础上,进一步分析了三种传输模型在误码率(BER)性能方面的差异。结果表明,高斯波束条件下孔径平均对误码率的影响明显,最先达到饱和状态,球面波次之,平面波较为平缓。
In wireless optical communication, the beam emitted by the communication system is generally regarded as a plane wave or a spherical wave, and the actual emitted beam is a Gaussian beam. Therefore, there are bound to be differences in the research of communication system performance indexes. By means of theoretical analysis and experimental simulation, the difference of the average aperture effect under the condition of plane wave, spherical wave and Gaussian beam is contrasted under the premise of not considering turbulent internal and external scale effects and weak turbulence. On this basis, further analysis of the three transmission model BER performance differences. The results show that the aperture average has significant effect on the bit error rate under the condition of Gaussian beam, and reaches the saturation state first, followed by the spherical wave and plane wave.