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Correcting the Linear Noise in Coherent Optical Orthogonal Frequency Division Multiplexing System Using Maximum Boundary Box Method

机译：最大边界盒法校正相干光正交频分复用系统中的线性噪声

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摘要

The Coherent Optical Orthogonal Frequency Division Multiplexing System (CO-OFDM) is the combination of the OFDM system with the advantages of the coherent detection. The CO-OFDM is mainly used for high-speed data transmission systems like 100 GB/s and 1 Tb/s. In the CO-OFDM implementation scheme, there are two kinds of noise such as the non-linear noise and the linear noise. The linear noise can be defined as the change in phase of the signal in the carrier signal when the carrier is passing through the optical fiber.;In this Thesis, an approach to reduce the linear noise in the CO-OFDM system is studied using the traditional skew detection techniques like Pilot Assisted (PA method) and Maximum Boundary Box (MBB method). The CO-OFDM system with Mach Zehnder Modulator (MZM) is analyzed and simulated in MATLAB and the linear noise is mitigated. The corrected signal is plotted in the form of the Bit Error Rate (BER) versus Signal to Noise Ratio (SNR) graph from high noise to low noise range environment. The BER of the two skew detection methods at SNR of 10 dB is compared under different M-QAM modulations like Binary Phase shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK). These comparisons show that the MBB method at Binary Phase-shift Keying (BPSK) modulation is best suitable to reduce the linear noise compared with PA method.
机译：相干光正交频分复用系统（CO-OFDM）是OFDM系统与相干检测优点的结合。 CO-OFDM主要用于诸如100 GB / s和1 Tb / s的高速数据传输系统。在CO-OFDM实现方案中，存在两种噪声，例如非线性噪声和线性噪声。线性噪声可以定义为当载波通过光纤时载波信号中信号的相位变化。本文研究了一种利用噪声抑制CO-OFDM系统中线性噪声的方法。传统的偏斜检测技术，如飞行员辅助（PA方法）和最大边界框（MBB方法）。在MATLAB中对带有马赫曾德尔调制器（MZM）的CO-OFDM系统进行了分析和仿真，从而降低了线性噪声。从高噪声到低噪声范围环境，校正后的信号以误码率（BER）与信噪比（SNR）图的形式绘制。在不同的M-QAM调制（如二进制相移键控（BPSK），正交相移键控（QPSK））下，比较了两种歪斜检测方法在SNR为10 dB时的BER。这些比较表明，与PA方法相比，采用二进制相移键控（BPSK）调制的MBB方法最适合降低线性噪声。

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  • 作者

    Mamidala, Srujan.;

  • 作者单位

    California State University, Long Beach.;

  • 授予单位 California State University, Long Beach.;
  • 学科 Electrical engineering.;Engineering.
  • 学位 M.S.
  • 年度 2017
  • 页码 47 p.
  • 总页数 47
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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