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Non-linear function for a Gaussian photo-reception in standard IM/DD systems

机译:标准IM / DD系统中用于高斯光接收的非线性函数

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摘要

In this paper, a set of mathematical transformations is developed to obtain the nonlinear function that recovers the Gaussian statistics after the square law distortion produced by the photodetector in Intensity Modulated/ Direct Detected IM/DD systems. Linear impairments in the optical domain like the Amplified Spontaneous Emission (ASE) or the Rayleigh Backscattering (RB) noise are considered the predominant. Here for the first time, a mathematical non-linear function is obtained without assuming any predefined function form. The result is that the noise distribution can be considered more signal-independent Gaussian after this non-linear transformation, than by using any other previously published operation. Applying this function in post-detection enables to make the system more linear, and then would improve the performance of the conventional electronic equalizers (EE). When using Maximum Likelihood Sequence Estimators (MLSE), a simplified metric can be used. Since the channel transfer function can be easily reproduced, computational cost and complexity are reduced. Keywords Photodetection • Gaussian statistics • Electronic equalization
机译:在本文中,开发了一组数学变换来获得非线性函数,该函数可以在强度调制/直接检测的IM / DD系统中由光电探测器产生的平方律失真之后恢复高斯统计量。光学域中的线性损伤(如放大自发辐射(ASE)或瑞利背向散射(RB)噪声)被认为是主要的。在这里,首次获得数学非线性函数而无需采用任何预定义的函数形式。结果是,与使用任何其他先前发布的操作相比,在进行此非线性转换后,可以认为噪声分布与信号无关的高斯分布更大。在后检测中应用此功能可以使系统更线性,然后可以提高常规电子均衡器(EE)的性能。使用最大似然序列估计器(MLSE)时,可以使用简化的度量。由于可以容易地再现信道传递函数,因此降低了计算成本和复杂度。关键字光电探测•高斯统计•电子均衡

著录项

  • 来源
    《Optical and quantum electronics》 |2010年第3期|p.165-178|共14页
  • 作者单位

    The Universitat Politecnica de Catalunya, Barcelona 08034, Spain;

    The Universitat Politecnica de Catalunya, Barcelona 08034, Spain;

    The Dipartment di Elettronica, Politecnico di Torino, Torino, Italy P. Poggiolini;

    The Dipartment di Elettronica, Politecnico di Torino, Torino, Italy P. Poggiolini;

    The Universitat Politecnica de Catalunya, Barcelona 08034, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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