光预放大脉冲位置调制接收机指向误差分析
Pointing Error Analysis of Optically Pre-Amplified Pulse Position Modulation Receivers
摘要：
本文分析了指向误差对光前置放大脉冲位置调制（PPM）接收机的平均误码率（ABEP）的影响。结果表明，波束宽度在ABEP中起着关键作用，并且通过利用次优宽度引入了显著的功率惩罚，特别是当指向误差包含抖动分量时。我们还提出了针对多种指向错误情况的波束宽度优化，并表明随着额外信号能量的可用，需要增加波束宽度。最佳光束宽度还受PPM调制阶数和光学噪声模式的影响，更节能（更高的调制阶数和更低的噪声）的系统允许更宽的光束。
英文摘要：
We present analytical results on the effect of pointing errors on the average bit-error probability (ABEP) of optically pre-amplified pulse-position modulation (PPM) receivers. The results show that the beam width plays a key role in the ABEP and that a significant power penalty is introduced by utilizing sub-optimal widths, especially when pointing errors incorporate a jitter component. We also present the optimisation the beam width for a number of pointing error scenarios and show that increasing beam widths are required as additional signal energy becomes available. The optimal beam width is also affected by the PPM modulation order and the optical noise modes, with more energy efficient (higher modulation order and lower noise) systems allowing for broader beams.
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