在光子辅助毫米波系统中优化多天线MRC用于16-QAM传输
Rahim Uddin1, Weiping Li1, Jianjun Yu1
1Key Laboratory for Information Science of Electromagnetic Waves (MoE), School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
这项研究展示了一种80 Gbps毫米波 (mmWave) 系统,使用16-方格振幅调制 (16-QAM) 和空间多样性来实现4.6公里的无线传输. 最大比率组合 (MRC) 显著提高了信号质量和减少了错误.
科学领域:
- 无线通信系统
- 光学工程
- 信号处理
背景情况:
- 长途无线连接面临的挑战包括低信号噪声比 (SNR) 和频道扭曲.
- 毫米波 (mmWave) 频率提供高带宽,但受到大气衰减的影响.
- 下一代网络需要高数据速率和长距离的可靠传输.
研究的目的:
- 开发和评估80Gbps光子辅助的毫米波系统,用于长途无线通信.
- 通过先进的调制和天线技术提高光谱效率并减轻频道损伤.
- 为了证明未来超高速网络的16倍幅调制 (16-QAM) 的可行性.
主要方法:
- 采用1x2单输入多输出 (SIMO) 架构,具有极化多变光学异构生成.
- 使用空间多样性接收与最大比率组合 (MRC) 进行信号增强.
- 实施了一种结合常量模块算法 (CMA) 和决策导向最小平均平方 (DD-LMS) 过的盲目均等方案.
主要成果:
- 在4.6公里内实现了强大的87.5GHz传输,数据速率为80Gbps.
- 通过MRC证明了大约3dB的SNR增益和显著的比特错误率 (BER) 降低.
- 与单个天线接收相比,在多天线配置中显示了更好的SNR性能.
结论:
- 具有适应空间多样性和DSP的光子辅助毫米波系统为高容量无线前程提供了强大的框架.
- 该系统有效地克服了大气衰减和动态通道损伤.
- 该研究验证了未来6G/7G网络使用16-QAM,平衡高数据速率与弹性性能.
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