摘要
在很大程度上,室内可见光通信系统的表现受到可见光多径传播信道的影响.已有研究尚局限于表征朗伯型光源波束配置下可见光无线信道特性,客观上忽视了对光源波束维度潜在差异化影响的关注与讨论.不同于已有研究,本文重点聚焦于非朗伯型波束条件下可见光无线信道的多径传播效应.为便于同传统朗伯型信道进行比较分析,本文主要从信道脉冲响应、信道频率响应以及信干噪比等方面进行量化表征.为不失一般性,在经典中型尺寸室内应用场景中,本文引入了两种典型的非朗伯波束进行量化建模分析.较之于朗伯波束,量化结果显示在信干噪比方面,两种非朗伯波束可分别引入约1 dB的增益及4 dB的损伤.因此,非朗伯波束客观上为可见光通信领域提供一个崭新的设计维度.
To a large extent,the performance of indoor visible light communication systems is affected by the visible light multipath propagation channel.Previous works are still limited to characterizing the characteristics of the visible light wireless channel characteristics under Lambertian source beams configuration.Objectively,the potential differential effects of beam dimensions of light sources are waiting for concerns and discussions.Unlike previous studies,this paper focuses on the frequency selectivity effect of visible light wireless channels under non-Lambertian beam conditions.For comparing with the conventional Lambertian channel,this work mainly quan-tifies the channel impulse response,channel frequency response and signal-to-interference&noise ratio.Without loss of generality,in classical indoor application scenario with medium-size,this work discusses the numerical mod-eling and analysis of two typical non-Lambertian beams.Compared with the Lambert beam,the numerical results illustrate that in SINR aspects,the two non-Lambertian beams could introduce about 1dB gain and 4dB damage,respectively.Therefore,objectively,the non-Lambertian beams provide one novel design dimension for visible light communications domain.
作者
丁举鹏
易芝玲
马洪兵
李亚平
张志军
解鹏
郭学让
陈习锋
DING Jupeng;I Chihlin;MA Hongbing;LI Yaping;ZHANG Zhijun;XIE Peng;GUO Xuerang;CHEN Xifeng(School of Information Science and Engineering,Xinjiang University,Urumqi Xinjiang 830046,China;China Mobile Research Institute,Beijing 100053,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Xinjiang Electronic Power Company Power Dispatch and Control Center,Urumqi Xinjiang 830000,China;Xinjiang Electronic Power Company Electric Power Research Institute Grid Technology Center,Urumqi Xinjiang 830011,China)
出处
《新疆大学学报（自然科学版）》
CAS
2020年第4期489-499,共11页
Journal of Xinjiang University(Natural Science Edition)
基金
国家自然科学基金(62061043,61401420)
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项目(042419004)
新疆维吾尔自治区天池博士计划项目(04231200728)
新疆大学自然科学基金项目(62031224624).
关键词
非朗伯光波束
可见光通信
频域信道特性
无线光通信
non-Lambertian optical beam
visible light communications
frequency domain channel characteris-tics
wireless optical communications
