论文标题
带有光子计数检测器阵列的光束跟踪在自由空间光学通信中
Beam Tracking with Photon-Counting Detector Arrays in Free-Space Optical Communications
论文作者
论文摘要
检测器阵列上的光束中心位置是一个重要的（隐藏）参数，不仅从跟踪角度来看，而且对于最佳检测自由空间光学通信中的脉冲位置调制符号也很重要。在本文中，我们研究了光子计数检测器阵列的梁位置估计问题，为此，我们提出并分析了许多非乘束束位置估计器。这些估计器的均方错误，偏差和错误性能的概率进行比较。此外，还得出了跟踪误差的CRAMER-RAO下限（CRLB），并且CRLB曲线为我们提供了有关检测器数量和梁半径对均方误差性能的影响的其他见解。最后，研究了光束位置估计对误差性能概率的影响，我们的研究得出结论，当阵列上的梁位置尽可能准确地估计时，将系统误差的可能性最小化。
Optical beam center position on an array of detectors is an important (hidden) parameter that is essential not only from a tracking perspective, but is also important for optimal detection of Pulse Position Modulation symbols in free-space optical communications. In this paper, we have examined the beam position estimation problem for photon-counting detector arrays, and to this end, we have proposed and analyzed a number of non-Bayesian beam position estimators. These estimators are compared in terms of their mean-square error, bias and the probability of error performance. Additionally, the Cramer-Rao Lower Bounds (CRLB) of the tracking error is also derived, and the CRLB curves give us additional insights concerning the effect of number of detectors and the beam radius on mean-square error performance. Finally, the effect of beam position estimation on the probability of error performance is investigated, and our study concludes that the probability of error of the system is minimized when the beam position on the array is estimated as accurately as possible.
