| 关伟鹏,文尚胜,胡卉馨,陈颖聪.基于双重调制技术的可见光通信系统研究[J].光电子激光,2015,26(11):2125~2132 |
| 基于双重调制技术的可见光通信系统研究 |
| Research on visible light communication system based on hybrid modulation techni que |
| 投稿时间：2015-07-10 |
| DOI： |
| 中文关键词: 可见光通信(VLC) 双重调制技术 脉冲振幅调制(PAM) 脉冲宽度调制(PWM) 误码 率(BER) |
| 英文关键词:visible light communication(VLC) hybrid modulation technique p ulse amplitude modulation(PAM) pulse width modulated(PWM) bit error rate (BER) |
| 基金项目:广东省战略性新兴产业专项(2011A081301017,2012A080304012,2012A080304001)、广州市科技计划(2013J4300021)和国家级大学生创新创业训练计划(201510561003)资助项目 (1.华南理工大学 材料科学与工程学院,广东 广州 510640； 2.华南理工大学 发光材料 与器件国家重点实验室,广东 广州 510640； 3.华南理工大学 电子与信息学院,广东 广州 510640) |
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| 中文摘要: |
| LED调制带宽制约着可见光通信(VLC) 系统的数据传输速率。为此,提出一种基于双重调制技术COB(chip on board)封装 的LED灯具,通过实现16级脉冲振幅 调制(PAM),将系统数据传输速率提升4倍；结合脉冲宽度调制(PWM)技术 进行调光,同时兼顾室内的照明及通信。采用Matlab软件模拟仿真视频传输试 验。结果表明,在相同信噪比(SNR)的情况下,基于双重 调制技术的VLC系统的误码率(BER)比传统使用开关键控(OOK)调控技术系 统的BER更低。本文系统在不增加器件带宽前提下,成倍提高了无线通信的 质量与 数据传输速率；从照明与通信的角度优化了VLC系统的信源,具有广阔的 应用前景。 |
| 英文摘要: |
| The transmission rate of visible light communication (VLC) system remains lo w due to the low bandwidth performance of the light emitting diode (LED).Therefo re,a VLC transmitter,which consists of a chip on boar d (COB) packaging LED lamp integrated with hybrid modulation technique,is presented.With a 16-level pulse amplitude modulation(PAM) scheme,the transmission rate of the VLC system is enhanced by about four times.In addition,it also c an be directly compatible with the pulse width modulation(PWM) dimming control sche mes, which can control illumination levels to suit for indoor lighting and communicat ion. Then,a video transmission system is simulated through MATLAB software.The results show that with the same signal-to-noise ratio (SNR),the LED based on COB packaging with hybrid modulation technique has lower bit error rate (BER) compared with the traditional system which is con troled by a single LED that is either ON or OFF modulation.Without increasing the bandwidth of the device,the qualit y and the data transmission rate of the VLC are improved. |
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