摘要
受限于传统朗伯光波束较强的空间指向性,基于同构朗伯光波束的可见光通信发射器设计难以提供令人满意的空间覆盖。综合考虑商用发光二极管(LED)光源多样的非朗伯光波束特性,提出一种基于非朗伯光波束的发射分集技术方案。该方案能够充分利用非朗伯光波束各自的空间辐射特性,将更多发射光功率针对性地投射到远离光发射器的覆盖边缘区域,在保持整体发射光功率恒定且分集角为60°时,所提出的非朗伯性分集方案能够引入3.4 dB的最小信噪比增益,同时将信噪比波动幅度从传统设计下的19.4 dB降低至非朗伯设计下的13.5 dB。
Due to the strong spatial directivity of the traditional Lambertian beam,the design of visible light communication transmitter based on isomorphic Lambertian beam is difficult to provide satisfactory spatial coverage.Considering the charac-teristics of various non-Lambertian light beams of commercial light-emitting diode(LED)light sources,a transmission diversity technology scheme based on non-Lambertian light beams is proposed.This scheme can make full use of the respective spatial radiation characteristics of the non-Lambertian optical beam to project more transmitted optical power to the coverage edge area far away from the optical transmitter.When the overall transmitted optical power is kept constant and the diversity angle is 60°,the proposed non-Lambertian diversity scheme can introduce a minimum signal-to-noise ratio gain of 3.4 dB,at the same time,the fluctuation amplitude of signal-to-noise ratio is reduced from 19.4 dB in traditional design to 13.5 dB in non-Lambert design.
作者
丁举鹏
易芝玲
赵楷
张琳琳
王丽丽
郑炅
DING Jupeng;I Chih-Lin;ZHAO Kai;ZHANG Linlin;WANG Lili;ZHENG Jiong(School of Information Science and Engineering,Xinjiang University,Urumqi 830046,China;Key Laboratory of Signal Detection and Processing in Xinjiang Uygur Autonomous Region,Xinjiang University,Urumqi 830046,China;China Mobile Research Institute,Beijing 100053,China;School of Information and Electrical Engineering,Ludong University,Yantai Shandong 264025,China)
出处
《光通信技术》
2022年第1期44-48,共5页
Optical Communication Technology
基金
国家自然科学基金项目(62061043)资助
新疆维吾尔自治区自然科学基金面上项目(2019D01C020)资助
新疆维吾尔自治区全职引进高层次创新人才项目(042419004)资助
新疆维吾尔自治区天山雪松计划项目(2020XS27)资助。
关键词
可见光通信
非朗伯光波束
发射分集
visible light communications
non-Lambertian optical beams
transmission diversity
