Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications

DING Ju-peng; I Chih-lin; ZHAO Kai; ZHANG Lin-lin; WANG Li-li

doi:10.13756/j.gtxyj.2022.02.001

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Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications

更新时间：2022-06-15

- Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications
- Study on Optical Communications Issue 2, Pages: 1-6(2022)
- 作者机构：
  
  1.新疆大学　信息科学与工程学院　信号检测与处理新疆维吾尔自治区重点实验室，乌鲁木齐　830046
  2.中国移动通信有限公司研究院，北京　100053
  3.鲁东大学　信息与电气工程学院工程　通信工程系，山东　烟台　264025
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2022.02.001
  CLC： TN929
- Published：10 April 2022，
  
  Received：12 May 2021，
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DING Ju-peng, I Chih-lin, ZHAO Kai, et al. Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications. [J]. Study on Optical Communications (2):1-6(2022)
DOI：

DING Ju-peng, I Chih-lin, ZHAO Kai, et al. Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications. [J]. Study on Optical Communications (2):1-6(2022) DOI： 10.13756/j.gtxyj.2022.02.001.

摘要

受限于传统可见光通信(VLC)的研究范式，研究人员在分析可见光无线覆盖时，通常假设光源遵从朗伯空间辐射特性。客观上，上述假设忽视了由不同类型光波束构成的潜在异构光波束，对基于异构光波束的VLC覆盖特性也缺少必要的探索。针对上述问题，综合考虑商用发光二极管(LED)光源的差异化非朗伯光波束特性，文章给出了多种潜在的异构光波束配置方案。同时，在典型室内场景，对传统同构朗伯光波束和文章所提异构光波束的覆盖特性进行了比较分析。量化结果显示，较之于传统朗伯光波束的发射器配置，文章所提异构光波束的配置方案能够引入高达1.97 dB的最小信噪比(SNR)增益，同时将SNR波动幅度从传统设计下的22.75 dB降低至异构设计下的15.33 dB。此外，SNR低于30 dB相对弱覆盖位置占比从初始配置下约13.20%降低至非异构设计下约7.23%。因此，异构光波束对室内空间覆盖的潜在影响获得了初步的证实。

Abstract

Due to the research paradigm of the conventional Visible Light Communications (VLC)

researchers usually assume that the optical sources follow the Lambertian spatial radiation characteristics. Objectively

this assumption ignores that the potential heterogeneous optical beams based on distinct beams

and the essential exploration for the coverage of the VLC based on the above heterogeneous optical beams. To address the issue

we comprehensively consider the distinct non-Lambertian optical beams characteristics of commercial light emitting diodes

and provide several potential heterogeneous optical beams configuration. Simultaneously

in typical indoor scenario

the coverage characteristics are compared between the conventional Lambertian beam based transmitter configuration and the proposed heterogeneous optical beams configuration. Numerical results show that

compared with the well-known Lambertian transmitter design

the proposed heterogeneous optical beams configuration could provide up to 1.97 dB minimum Signal-to-Noise Ratio (SNR) gain

and modify the SNR fluctuation extent from about 22.75 dB of original design to about 15.33 dB in the heterogeneous configuration. Moreover

via the heterogeneous configuration

the weak coverage proportion with lower than 30 dB SNR

is reduced to about 7.23% from original proportion of about 13.2%. Therefore

to indoor spatial coverage

the effects induced by the heterogeneous optical beams are verified preliminarily.

关键词

可见光通信非朗伯光波束异构光波束覆盖特性

Keywords

VLCnon-Lambertian optical beamsheterogeneous optical beamscoverage characteristics

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