کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7929986 | 1512582 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of LED's SAHPs to simultaneously enhance SNR uniformity and support dimming control for visible light communication
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optimization of LED's SAHPs to simultaneously enhance SNR uniformity and support dimming control for visible light communication Optimization of LED's SAHPs to simultaneously enhance SNR uniformity and support dimming control for visible light communication](/preview/png/7929986.png)
چکیده انگلیسی
In this paper, we propose a method to enhance signal to noise ratio (SNR) uniformity and simultaneously support dimming control via optimization of LEDs' semi-angle at half power (SAHP) for visible light communication (VLC) systems. The uniformity of SNR performance is analyzed. Subcarrier-4pulse position modulation (SC-4PPM) is employed to supply light brightness control. Performance evaluation demonstrates that the overall SNR variation can be managed within 0.5Â dB and the lowest SNR can be improved by nearly 5Â dB for different dimming factors. A linear dimming control model is presented for the modulation parameters under optimal conditions. Tolerance analysis shows that our method is robust against practical parameters deviations. Feasibility evaluations show that the optimization demonstrates better performance than the non-optimized situations, both in SNR value and its distribution for various LED powers, receiver FOVs (field of view), LED numbers and room dimensions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 341, 15 April 2015, Pages 218-227
Journal: Optics Communications - Volume 341, 15 April 2015, Pages 218-227
نویسندگان
Fang Li, Kan Wu, Weiwen Zou, Jianping Chen,