摘要
针对环境光强突变引起的BPSK解调基线漂移问题,文章设计了一种基于自适应阈值的BPSK可见光通信系统。该系统利用FPGA的高速并行处理能力,动态跟踪信道状态并实时优化判决门限,有效克服固定阈值在动态光环境下的适应性缺陷。实验结果表明,在模拟光强突变的环境下,系统在1.75 m的距离和2.304 Mbps的速率条件下,自适应阈值方案将误码率从固定阈值方案的1.13×10^(-1)降低至4.2×10^(-2),相对误码率改善达62.8%。此外,系统在黑暗环境下实现了1.5 m距离和2.304 Mbps速率的可靠传输。该研究为可见光通信在复杂光环境下的可靠传输提供了理论基础和技术方案。
To address the issue of BPSK demodulation baseline drift caused by sudden changes in ambient light intensity,in this study,a BPSK visible light communication system is proposed based on an adaptive threshold.The system leverages the high-speed parallel processing capabilities of an FPGA to dynamically track channel conditions and optimize decision thresholds in real time,effectively overcoming the adaptability limitations of fixed thresholds in dynamic light environments.Experimental results show that under simulated sudden changes in light intensity,at a distance of 1.75 m and a data rate of 2.304 Mbps,the adaptive threshold scheme reduces the bit error rate from 1.13×10^(-1) in the fixed threshold scheme to 4.2×10^(-2),representing a relative improvement of 62.8%.Additionally,the system achieved reliable transmission at a distance of 1.5 m and a data rate of 2.304 Mbps in a dark environment.This research provides a theoretical foundation and technical solutions for the reliable transmission of visible light communication in complex optical environments.
作者
梁哲
兰志强
朱坤
何剑
穆继亮
丑修建
LIANG Zhe;LAN Zhiqiang;ZHU Kun;HE Jian;MU Jiliang;CHOU Xiujian(State key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument,North University of China,Taiyuan 030051,CHN;School of Future Science and Engineering,Soochow University,Suzhou 215222,CHN)
出处
《半导体光电》
北大核心
2025年第6期1095-1100,共6页
Semiconductor Optoelectronics
基金
极限环境光电动态测试技术与仪器全国重点实验室基金项目(2024-SYSJJ-05)
国家自然科学基金资助项目(62301349,52375571,62171414,52175554,52205608)
山西省基础研究计划项目(20210302123059,20210302124610).
关键词
可见光通信
二进制相移键控
基线漂移
FPGA
自适应阈值
visible light communication
binary phase-shift keying
baseline drift
FPGA
adaptive threshold
