用于VLC的LED半功率角优化布局方法研究  

Optimization of LED SAHP for Indoor Visible Light Communication Systems

作　　者：李昉[1] 陈建平[1] 

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《中兴通讯技术》2014年第6期33-35,51,共4页ZTE Technology Journal

基　　金：国家重点基础研究发展("973")规划(2011CB301700)

摘　　要：提出通过优化发光二极管(LED)半功率角的布局来提高室内可见光通信系统性能的方法。4种典型的LED布局方式的仿真结果表明,该方法对于提高可见光通信系统的信噪比、降低信噪比的波动有明显效果。对于均匀的LED布局方式,信噪比的波动从未优化时的5.2 d B大幅下降到0.3 d B。该方法不需要调节LED的功率,更适合于工程运用。This paper describes a method for optimizing the semi-angle at half power （SAHP） of a LED in order to improve indoor visible light communication. Four typical LED alignments are studied. The simulation results show that the proposed method increases SNR and reduces its fluctuation. Especial y in the case of evenly distributed LED alignment, SNR fluctuation reduces significantly—from 5.2 dB to 0.3 dB. A distinguishing feature of this method is that the same power is used for each LED, which makes this method feasible for practical applications.

关 键 词：可见光通信 发光二极管 优化布局 

分 类 号：TN929.1[电子电信—通信与信息系统]