基于异构光波束的可见光通信覆盖特性分析  

Coverage Characteristics Analysis of Heterogeneous Optical Beams based Visible Light Communications

作　　者：丁举鹏 易芝玲 赵楷[1] 张琳琳[1] 王丽丽[3] DING Ju-peng;I Chih-lin;ZHAO Kai;ZHANG Lin-lin;WANG Li-li(Key Laboratory of Signal Detection and Processing in Xinjiang Uygur Autonomous Region,School of Information Science and Engineering,Xinjiang University,Urumqi 830046,China;China Mobile Research Institute,Beijing 100053,China;Department of Communication Engineering,School of Information and Electrical Engineering,Ludong University,Yantai 264025,China)

机构地区：[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

出　　处：《光通信研究》2022年第2期1-6,共6页Study on Optical Communications

基　　金：国家自然科学基金资助项目(62061043);新疆维吾尔自治区自然科学基金面上项目(2019D01C020);新疆维吾尔自治区全职引进高层次创新人才资助项目(042419004);新疆维吾尔自治区天山雪松计划资助项目(2020XS27)。

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。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 

分 类 号：TN929[电子电信—通信与信息系统]