渐进衰减多分支接收用于高空平台间光链路

中文摘要 AI 辅助

高空平台间光链路在短距离时可能经历接收器饱和，而在较长距离时受信噪比限制。本工作提出一种饱和感知的空间多分支强度调制直接检测接收器，采用非重叠孔径，具有渐进衰减和选择具有最高瞬时信噪比的非饱和分支的功能。考虑有限孔径指向损耗和常见二维指向抖动的高斯光束模型，导出了饱和、信噪比不足、可用性和中断概率的闭式分支级表达式。结果表明，额外分支抑制了短距离饱和中断，将最小中断点移至更短距离，并使渐进衰减能够控制饱和信噪比权衡。蒙特卡洛模拟与分析结果紧密匹配。总体而言，所提出的架构提供了一种低复杂度的方法来扩展高空平台间光接收器的可用动态范围。

英文摘要

Inter HAPS optical links can experience receiver saturation at short separations and become signal to noise ratio (SNR) limited at longer distances. This work proposes a saturation aware spatial multi branch intensity modulation direct detection receiver using nonoverlapping apertures with progressive attenuation and selection of the nonsaturated branch with the highest instantaneous SNR. A Gaussian beam model with finite aperture pointing loss and common two dimensional pointing jitter yields closed form branch level expressions for saturation, insufficient SNR, usability, and outage probabilities. Results show that additional branches suppress short range saturation outage, shift the minimum outage point toward shorter separations, and enable progressive attenuation to control the saturation SNR tradeoff. Monte Carlo simulations closely match the analytical results. Overall, the proposed architecture provides a low complexity approach to extending the usable dynamic range of inter HAPS optical receivers.

发表机构

• Hamad Bin Khalifa University（哈马德·本·哈利法大学）
• Özyeǧin University（奥兹耶金大学）
• The University of Edinburgh（爱丁堡大学）
• Qatar University（卡塔尔大学）

机构由 AI 辅助整理，请以论文原文为准。