激光与光电子学进展, 2017, 54 (5): 050602, 网络出版: 2017-05-03  

基于发光二极管光源的远距离可见光通信 下载: 711次

Long-Distance Visible Light Communication Based on Light Emitting Diode Source
作者单位
1 清华大学信息科学技术学院电子工程系信息科学与技术国家实验室, 北京 100084
2 深圳清华大学研究院深圳市数字电视系统重点实验室广东省数字电视系统重点实验室, 广东 深圳 518057
3 国网信息通信产业集团有限公司, 北京 100031
摘要
基于商用单个发光二极管(LED)光源进行室外远距离通信实验, 实验中对LED光源采用二进制键控(OOK)调制方式, 在接收端采用低密度奇偶校验(LDPC)纠错编码。在晴朗的白天环境下, 当LED发出的光以3°束散角发射且调制速率为23 MHz(净数据传输速率为11.5 Mbit/s)时, 实现了传输距离为1 km的室外光通信实验, 误码率为10-6。实验表明, 当误码率为10-4时, 采用LDPC(4000,2000)编码的净数据传输速率是未编码时的2.4倍。该实验系统对光准直要求低, 可较好地抵抗刮风晃动和大气湍流等环境因素的影响。
Abstract
A long-distance outdoor communication experiment based on a commercial light-emitting diode (LED) source is carried out. In the experiment, the LED source is modulated by on-off keying (OOK) modulation. The low-density parity-check (LDPC) error-correcting code is used at the receiver. The outdoor light communication experiment with communication distance of 1 km is accomplished at clear daytime when the beam of LED is launched with divergence angle of 3° and modulation rate of 23 MHz (net data transmission rate is 11.5 Mbit/s), and the bit error rate of 10-6 is achieved. The experimental result shows that the data transmission rate with LDPC (4000, 2000) code is 2.4 times than that without coding when the bit error rate is 10-4. The experimental system is not need to accurate collimation and can overcome the negative environmental consequences such as the wind shaking and the atmospheric turbulence.

张宇飞, 张洪明, 王鹏, 刘涛, 孙德栋, 宋健. 基于发光二极管光源的远距离可见光通信[J]. 激光与光电子学进展, 2017, 54(5): 050602. Zhang Yufei, Zhang Hongming, Wang Peng, Liu Tao, Sun Dedong, Song Jian. Long-Distance Visible Light Communication Based on Light Emitting Diode Source[J]. Laser & Optoelectronics Progress, 2017, 54(5): 050602.

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