Communication theory for the turbulent atmosphere
Communication theory for the turbulent atmosphere
复制标题
湍流大气的通信理论
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
S. J. Halme
中科院分区：
文献类型：
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作者：
E. Hoversten;R. Harger;S. J. Halme
本文研究了如何利用统计通信理论来对抗光通信系统中大气湍流的影响。其目的是提供一个框架，用于讨论和联系文献中现有的分析结果以及一些新的或至少不广为人知的结果，并用于激励和指导未来的工作。同时考虑了数字通信和参数和波形估计，并重点讨论了前者。作为必要的数学基础，讨论了相关的统计信道模型、空间表示问题、量子场模型以及光学探测器的输出统计。对于数字通信系统，讨论和关联了最佳量子接收器和结构化接收器的结构和性能，例如具有单个检测器或检测器阵列的直接和外差检测接收器。强调了获得这些结果所需的简化近似和假设。估计理论主要是从经典(非量子)的观点来考虑的。强调了由似然泛函的某些近似所产生的处理机的二次泛函结构。考虑了估计性能的Cramer-Rao界，并应用于几个例子。
This paper is concerned with an examination of how statistical communication theory can be used to combat the effects of atmospheric turbulence in optical communication systems. The objective is to provide a framework to be used in discussing and relating the analytical results presently available in the literature as well as some new, or at least not widely known, results and in motivating and guiding future work. Both digital communication and parameter and waveform estimation are considered, with the greater emphasis on the former. As necessary mathematical preliminaries, the relevant statistical channel model, the problems of spatial representation, quantum field models, and the output statistics of optical detectors are considered. For digital-communication systems, the structure and performance of optimum quantum receivers and of structured receivers, e.g., direct-and heterodyne-detection receivers with either a single detector or a detector array, are discussed and related. The simplifying approximations and assumptions required to obtain these results are emphasized. Estimation theory is considered primarily from a classical (nonquantum) viewpoint. The quadratic functional structure of the processors that result from certain approximations to the likelihood functional are emphasized. Cramer-Rao bounds on the estimation performance are considered and applied to several examples.