Study on CSRZ-based DQPSK multi-level phase modulation technology

Zhang Xia1; Wang Fang1; Zhang Min1; Niu Huijuan1; Xu Hengying1; Bai Chenglin1; Zhang Xiaoguang3

doi:10.13756/j.gtxyj.2009.05.005

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Study on CSRZ-based DQPSK multi-level phase modulation technology

- Study on CSRZ-based DQPSK multi-level phase modulation technology
- Study on Optical communication Issue 5, Pages: 8-9(2009)
- 作者机构：
  
  1. 聊城大学
  2. 山东省光通信科学与技术重点实验室
  3. 北京邮电大学
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2009.05.005
  CLC： TN911.3
- Published：2009，
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[1]张霞,王芳,张民,牛慧娟,许恒迎,白成林,张晓光.基于CSRZ码的DQPSK多级相位调制技术的研究[J].光通信研究,2009(05):8-9+13.

Zhang Xia1, Wang Fang1, Zhang Min1, et al. Study on CSRZ-based DQPSK multi-level phase modulation technology. [J]. (5):8-9(2009)
[1]张霞,王芳,张民,牛慧娟,许恒迎,白成林,张晓光.基于CSRZ码的DQPSK多级相位调制技术的研究[J].光通信研究,2009(05):8-9+13. DOI： 10.13756/j.gtxyj.2009.05.005.

Zhang Xia1, Wang Fang1, Zhang Min1, et al. Study on CSRZ-based DQPSK multi-level phase modulation technology. [J]. (5):8-9(2009) DOI： 10.13756/j.gtxyj.2009.05.005.

摘要

文章从理论上推导出了载波抑制归零（CSRZ）码和差分正交相移键控（DQPSK）的调制解调原理公式

给出了实现的具体过程

以及仿真得到的调制后的频谱图和解调后的眼图。结果表明

CSRZ-DQPSK作为新型多级相位调制格式具有更窄的频谱宽度、更高的频谱效率

解调后的眼图也很好

有望成为下一代光纤通信系统的首选传输码型。

Abstract

This article theoretically derives the formulas for the principles of Carrier-Suppressed Return-to-Zero（CSRZ） and Differential Quadrature Phase Shift Keying（DQPSK） modem

presents the specific processes of their implementation and obtains by simulation their spectra after modulation and eye diagrams after demodulation.The results show that CSRZ-DQPSK

as a new multi-level phase modulation format

has narrower spectrum width and higher spectrum efficiency

and good eye diagram performance after demodulation

expected to become the first choice of the transmission code for the next generation fiber-optic communication system.

关键词

光纤通信技术载波抑制归零码差分正交相移键控多级相位调制

Keywords

fiber-optic communication technologyCSRZDQPSKmulti-level phase modulation

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School of Electrical Engineering and Automation,Henan Polytechnic University

College of Mechanical and Electrical Engineering,Jiaozuo University

Department of Information Engineering,Shenzhen University

State Key Laboratory of Optical Communication Technologies and Networks

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