Distribution Decomposition and Sum-Capacity Results of Two-User Optical Intensity Multiple Access Channels

被引：1
|
作者：
Li L. [1 ]
Chen R.-H. [2 ]
Zhou J. [3 ]
机构：
[1] East China Normal University, Department of Communication and Electronic Engineering, Shanghai
[2] Sixty-Third Research Institute, National University of Defense Technology, Nanjing
[3] Shaoxing University, Department of Computer Science and Engineering, Shaoxing
来源：
IEEE Transactions on Information Theory | 2023年 / 69卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Gaussian noise; intensity modulation-direct detection (IM-DD); multiple access channel (MAC); optical wireless communication; peak- and average-intensity constraints; sum-capacity;
D O I：
10.1109/TIT.2023.3279511
中图分类号：
学科分类号：
摘要：
This paper investigates the sum-capacity of two-user optical intensity multiple access channels with per-user peak- or/and average-intensity constraints. By leveraging tools from the decomposition of certain distributions, we derive several lower bounds on the sum-capacity. In the high signal-to-noise ratio (SNR) regime, some bounds asymptotically match or approach the sum-capacity, thus closing or reducing the existing gaps to the high-SNR asymptotic sum-capacity. At moderate SNR, some bounds are also fairly close to the sum-capacity. © 1963-2012 IEEE.
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页码：5532 / 5549
页数：17
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