概括
一个新的混合前置错误校正 (FEC) 均等化 (IFE) 方案解决了高带宽光学系统中的符号间干扰 (ISI). 这种综合方法提高了信号质量,并比传统方法提供了显著的收益.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 信息理论 信息理论
背景情况:
- 符号间干扰 (ISI) 是高带宽光学系统的一个主要挑战,限制了效率.
- 现有的方法往往独立处理等分和前置错误校正 (FEC),导致性能不足于最佳.
研究的目的:
- 提出并展示一个混合集成的前期错误纠正 (FEC) 均等 (IFE) 方案.
- 在连贯光学互连中解决极高带宽效率 (BE) 应用中的严重ISI问题.
主要方法:
- 一个自适应的线性最小平均平方误差 (LMMSE) 均衡器估计了通道响应.
- 软输入软输出 (SISO) 从低密度平价检查 (LDPC) 解码器的后续信息有助于ISI扣除.
- 在60 GBaud极化分裂多重化16个方格振幅调制系统与5GHz超窄带宽接收器进行的实验.
主要成果:
- 与串行等效器/FEC结构相比,IFE方案实现了超过3dB的光学信号噪声比率 (OSNR) 增益,比特误差率 (BER) 为1x10^-2.
- 与传统的软决策最大概率序列估计 (MLSE) 相比,证明了优越的ISI减少能力.
结论:
- 拟议的IFE方案可以同时进行准确的ISI扣除和可靠的FEC解码.
- 综合方法在具有挑战性的光通信场景中提供了更大的稳定性和性能增长.
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