利用 LiFi 蜂窝网络中的优化角度分集接收器缓解干扰

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-09-24 DOI:10.1016/j.optcom.2024.131125

Zhihong Zeng , Chen Chen , Xiping Wu , Svetislav Savović , Mohammad Dehghani Soltani , Majid Safari , Harald Haas

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引用次数: 0

摘要

光保真（LiFi）是一种新兴的高速短程移动通信技术。小区间干扰（ICI）是限制光 attocell 网络系统性能的一个重要问题。有人提出了角度分集接收器（ADR）来缓解 ICI。本文研究了金字塔接收器（PR）和截断金字塔接收器（TPR）的结构。本文定义并研究了金字塔接收器和截顶金字塔接收器的覆盖问题，并通过分析给出了每个金字塔接收器的视场（FOV）下限。结果表明，TPR 和 PR 的视场角下限分别为 20°和 30°。其中考虑了随机器件方向和漫反射链路信号传播的影响。比较了 PR 和 TPR 的性能，并通过共同考虑倾斜角、FOV 和 PD 数量的影响，提出了优化的 ADR 结构。对于发射机带宽受限的系统，PR 的最佳 PD 值为 6，TPR 为 9，而对于接收机带宽受限的系统，最佳 PD 值为 15。此外，双源（DS）小区系统（每个 LiFi 接入点由两个发射相同信息信号但极性相反的信号源组成）被证明在干扰受限或噪声加干扰受限的情况下优于单源小区（SS）系统。然而，在噪声受限的情况下，SS 小区系统优于 DS 小区系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Interference mitigation using optimised angle diversity receiver in LiFi cellular network

Light-fidelity (LiFi) is an emerging technology for high-speed short-range mobile communications. Inter-cell interference (ICI) is an important issue that limits the system performance in an optical attocell network. Angle diversity receivers (ADRs) have been proposed to mitigate ICI. In this paper, the structure of pyramid receivers (PRs) and truncated pyramid receivers (TPRs) are studied. The coverage problems of PRs and TPRs are defined and investigated, and the lower bound of field of view (FOV) for each PD is given analytically. It is shown that the lower bound of FOV for TPR and PR are 20° and 30°, respectively. The impact of random device orientation and diffuse link signal propagation are taken into consideration. The performances of PRs and TPRs are compared, and optimised ADR structures are proposed by jointly considering the impact of tilt angle, FOV, and the number of PDs. For a transmitter-bandwidth limited system, the optimal PD values are 6 for PR and 9 for TPR, whereas, for a receiver-bandwidth limited system, the optimal PD value is 15. In addition, the double source (DS) cell system, where each LiFi AP consists of two sources transmitting the same information signals but with opposite polarity, is proved to outperform the single source cell (SS) system in interference limited or noise-plus-interference limited scenario. However, the SS cell system outperforms the DS cell system in a noise-limited scenario.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.