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对MIMO-OFDM可见光通信系统进行叠加的三维64QAM星座设计
Optics express
|November 29, 2023
概括
新的叠加的3D-64QAM星座可以提高可见光通信 (VLC) 系统的数据速率,使用MIMO-OFDM. 这些方案在高度相关的道中实现了更好的性能,提高了位误差率和LED效率.
科学领域:
- 光学通信是指光学通信.
- 无线通信系统无线通信系统
- 信号处理 信号处理
背景情况:
- 多个输入多个输出直角频率分割复杂化 (MIMO-OFDM) 提高了可见光通信 (VLC) 的数据速率.
- 在MIMO系统中,高通道相关性限制了性能.
- 叠加的星座在相关的MIMO通道中提供了多样性增长.
研究的目的:
- 为MIMO-OFDM VLC系统提出新的叠加的三维64次方格振幅调制 (3D-64QAM) 星座方案.
- 为了研究两LED和三LED叠加的3D-64QAM方案的性能.
- 分析增加欧几里德距离和减少LED非线性带来的好处.
主要方法:
- 开发双LED和三LED叠加的3D-64QAM星座图. 开发两LED和三LED叠加的3D-64QAM星座图.
- 理论分析和计算机模拟.
- 实验性演示和性能评估.
主要成果:
- 叠加的3D-64QAM星座的最小欧几里德距离是2D-64QAM的1.67倍.
- 同等功率的叠加减少了LED非线性和光二极管功率竞争.
- 与两LED方案相比,三LED方案提供了较低的BER和更好的动态范围.
- 实验结果证实了比传统的叠加2D-64QAM更高的BER性能.
结论:
- 叠加的3D-64QAM方案对MIMO-OFDM VLC有效,特别是在相关的频道中.
- 三LED方案提供了更高的性能和效率.
- 拟议的方案为高性能VLC系统提供了一个有希望的方法.
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