概括
本研究介绍了一种使用功率域复杂化 (PDM) 来提高信号质量的简化概率塑造 (PS) 策略. 新的比特加权分布匹配 (BWDM) 方法提高了高速光通信系统的接收灵敏度.
科学领域:
- 光学通信系统 光学通信系统
- 信号处理 信号处理
- 信息理论是信息理论.
背景情况:
- 概率造型 (PS) 对于优化光通信性能至关重要.
- 功率域复杂化 (PDM) 为高级信号编码提供了一个框架.
- 现有的PS计划可能很复杂,限制了实际实施.
研究的目的:
- 为PDM系统开发一个简化的比特类概率塑造 (PS) 策略.
- 通过使用低复杂度的方法提高信号质量和传输效率.
- 通过实验验证拟议的方案.
主要方法:
- 采用比特加权分布匹配 (BWDM) 进行概率造型.
- 利用信号叠加来编码低功率QPSK信号中的位.
- 实施了区域决策方法,用于在接收器上进行调节.
主要成果:
- 在2公里的7核光纤上以103.6Gb/s的净速率实现了准确的信号传输.
- 拟议的PS-16QAM信号显示了改进的接收灵敏度 (0.4dB和0.33dB的收益).
- 该方案的性能优于没有PS的统一16QAM和PDM-OFDM信号,BER的3.8 × 10−3.
结论:
- 基于PDM的简化比特类PS策略对于高速光通信是有效的.
- BWDM方法提供了一种低复杂性和高效的方法来实现概率塑造.
- 实验验证证证实了拟议方案在性能和效率方面的实际好处.
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