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在具有模式依赖损失的光学SDM系统中对最佳MIMO线性接收器进行BER分析
Optics express
|October 20, 2023
概括
本研究分析了带有MIMO MMSE接收器的空间分区复杂化系统中的符号间干扰和交叉声,发现取决于模式的损失/收益影响比特错误率不可预测. 使用通用极值分布来表征性能.
科学领域:
- 视觉通信系统工程 视觉通信系统工程
- 无线和光学通信的信号处理.
- 信息理论和编码.
背景情况:
- 最小平均平方误差 (MMSE) 接收器是空间分割复杂化 (SDM) 连贯光学系统的标准.
- 模式依赖损失 (MDL) 和模式依赖增益 (MDG) 引入不可预测的符号间干扰 (ISI) 和交叉声.
- 随机的MDL/MDG对理想的MIMO MMSE接收器中的比特错误率 (BER) 的影响尚不清楚.
研究的目的:
- 为了评估MIMO MMSE接收器后的残余扭曲 (ISI和交叉声).
- 在随机的MDL/MDG条件下分析BER的概率密度分布 (PDF).
- 提出预测系统性能和中断概率的方法.
主要方法:
- 分析评估剩余的ISI和交叉通话.
- 使用单载波2PAM系统与MIMO分数间隔等分器 (FSE) 的数值模拟.
- 将BER PDF与通用极值 (GEV) 分布相匹配,并提出参数调整函数.
主要成果:
- 在MIMO MMSE接收器之后的残余扭曲的特征.
- 分析了BER PDF,并发现它符合GEV分布.
- 建议使用多项式函数将系统参数 (MDL/MDG,SNR) 与GEV PDF参数联系起来.
- 为目标中断概率生成BER的轮图.
结论:
- 该研究为分析和预测SDM光学系统与MIMO MMSE接收器在现实的通道损伤下性能提供了一个框架.
- 电力汽车分布有效地模拟随机的BER,使得更好的系统设计和性能保证.
- 拟议的轮图有助于优化系统参数以达到所需的可靠性水平.
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