面向6G的欠采样相移键控可见光调制方案  

Study and Implementation on UPSOOK Modulation Scheme of Visible Light Communication for 6G

作　　者：包荣珍 彭朗 贾松霖 冯春燕[1] 朱志宇 杨洋 BAO Rongzhen;PENG Lang;JIA Songlin;FENG Chunyan;ZHU Zhiyu;YANG Yang(School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Aerospace Dongfanghong Satellite Co.,Ltd.,Beijing 100094,China)

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]航天东方红卫星有限公司,北京100094

出　　处：《移动通信》2022年第6期31-37,71,共8页Mobile Communications

基　　金：国家自然科学基金项目(61871047,61901047);江西省“揭榜挂帅”关键技术攻关项目(20213AAE01007);北京邮电大学研究生创新创业项目资助(2022-YC-S001)。

摘　　要：可见光通信作为6G候选技术,可复用现有发光二极管、手机摄像头等实现绿色、安全通信。针对现有基于手机摄像头的可见光通信系统还存在相机帧率不稳定等因素限制通信性能的问题,提出了一种FEC-UPSOOK调制方案。首先设计了FEC-UPSOOK的系统帧结构,可消除收发端之间的相位误差;然后设计自适应阈值计算策略,以避免收发端之间距离和角度的差异对采样亮度值造成的影响;最后通过针对帧率抖动的前向纠错机制完成纠错,从而实现可靠的数据传输。为了验证该技术的有效性和可靠性,进一步构建了原型系统进行实测验证,结果表明FEC-UPSOOK调制方案可以有效提高系统的误码性能。As a candidate 6G technology, visible light communication can reuse the existing LED and mobile camera to realize green and safe communication. However, the existing visible light communication system based on mobile camera still has the problem that the unstable camera frame rate and other factors limit the communication performance. To solve this problem, this paper proposes an undersampled phase shift on-off keying modulation scheme based on forward error correction(FEC-UPSOOK). Firstly, the frame structure of FEC-UPSOOK system is designed to eliminate the phase error between transceivers, and then an adaptive threshold calculation strategy is designed to avoid the impact of the distance and angle difference between transceivers on the sampling brightness value. Finally, the forward error correction mechanism for frame rate jitter is used to complete the error correction and realize reliable data transmission. In order to verify the effectiveness and reliability of the proposed technology, this paper further constructs a prototype system for experimental verification. Experimental results show that the FEC-UPSOOK modulation scheme can effectively improve the bit error performance of the system.

关 键 词：可见光通信 手机摄像头 欠采样相移键控 误比特率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]