概括
本研究介绍了一种计算效率高的算法,用于在数字-模拟无线电-光纤 (DA-RoF) 系统中取消复合三倍节拍 (CTB) 扭曲. 这种新技术可以在低成本的直接调制激光链路中提高信号噪声比,而不需要培训.
科学领域:
- 光学通信是指光学通信的应用.
- 信号处理 信号处理
背景情况:
- 数字-模拟无线电-光纤 (DA-RoF) 是移动前线运输的一个有前途的解决方案.
- 具有直接检测 (DML-DD) 的直接调制激光链接面临复合二阶 (CSO) 和复合三倍节拍 (CTB) 扭曲,这是由于声分散相互作用造成的.
研究的目的:
- 为DA-RoF前线运输提出并演示一个计算效率高的复合三倍节拍取消 (CTB-C) 算法.
- 为了抑制CSO和CTB在分散不补偿的C频段DML-DD链路中的扭曲.
主要方法:
- 开发了基于非线性扭曲的理论模型的接收端数字信号处理 (DSP) 算法.
- 在一个概念验证实验中,在10公里标准单模光纤 (SSMF) 上使用1024-QAM OFDM信号实现并测试了CTB-C算法.
主要成果:
- 在恢复的信号噪声比率 (SNR) 中实现了1.2dB的改进.
- 证明有效地抑制了CSO和CTB的扭曲.
- 在复杂性限制下,CTB-C技术的性能与基于Volterra的前均衡器 (VFE) 相美.
结论:
- 拟议的CTB-C算法提供了一种有效的解决方案,用于减轻DA-RoF前程系统中的非线性扭曲.
- 这种技术可以提高低成本的DML-DD链接的性能,而不需要培训过程.
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