Analysis of Laser Phase Noise Effect in Direct- Detection Optical OFDM Transmission
Analysis of Laser Phase Noise Effect in Direct- Detection Optical OFDM Transmission
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DOI：
10.1109/jlt.2010.2055834
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发表时间：
2010-07
影响因子：
4.7
通讯作者：
W. Peng
中科院分区：
文献类型：
--
作者：
W. Peng
在本文中，我们描述了激光相位噪声（PN）的直接检测光OFDM（DDO-OFDM）的影响，并确定其与相干光OFDM（CO-OFDM）的许多不同之处。不同的PN效应，包括功率退化，相位旋转项（PRT），和载波间干扰（ICI）的分析模型，给出的关键系统参数与或没有小PN的假设。特别地，还提供了具有简单形式的ICI功率的解析上界。我们还提出了一种误码率（BER）估计方法，这被证明是可靠的光信噪比（OSNR）的罚款低于2 dB。此外，PN公差，在OSNR的惩罚，也数值分析和讨论与不同的QAM格式，数据速率，激光线宽，和子载波数。
In this paper, we characterize the impact of laser phase noise (PN) in direct-detection optical OFDM (DDO-OFDM) and identify its many differences from those in coherent optical OFDM (CO-OFDM). The analytical models for the diverse PN effects, including power degradation, phase rotation term (PRT), and inter-carrier interference (ICI), are given in terms of critical system parameters with or without the small PN assumption. In particular, the analytical upper-bound of the ICI power with a simple form is also provided. We also present a bit error rate (BER) estimation approach which is proven to be reliable for an optical signal-to-noise-ratio (OSNR) penalty lower than ~ 2 dB. In addition, the PN tolerances, in terms of OSNR penalty, are also numerically analyzed and discussed with different QAM formats, data rates, laser linewdiths, and subcarrier numbers.