Effects of pulse shape on chip-asynchronous coherent time-spreading OCDMA

Wu Qing; Gong Fangping; Ji Jianhua

doi:10.13756/j.gtxyj.2009.05.020

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Effects of pulse shape on chip-asynchronous coherent time-spreading OCDMA

- Effects of pulse shape on chip-asynchronous coherent time-spreading OCDMA
- Study on Optical communication Issue 5, Pages: 48-50(2009)
- 作者机构：
  
  深圳大学新技术研究中心
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2009.05.020
  CLC： TN929.533
- Published：2009，
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[1]吴青,龚方平,吉建华.脉冲形状对切普异步时域相位OCDMA的影响[J].光通信研究,2009(05):48-50.

Wu Qing, Gong Fangping, Ji Jianhua. Effects of pulse shape on chip-asynchronous coherent time-spreading OCDMA. [J]. (5):48-50(2009)
[1]吴青,龚方平,吉建华.脉冲形状对切普异步时域相位OCDMA的影响[J].光通信研究,2009(05):48-50. DOI： 10.13756/j.gtxyj.2009.05.020.

Wu Qing, Gong Fangping, Ji Jianhua. Effects of pulse shape on chip-asynchronous coherent time-spreading OCDMA. [J]. (5):48-50(2009) DOI： 10.13756/j.gtxyj.2009.05.020.

摘要

采用超抽样序列的非周期互相关函数值

研究了脉冲形状对切普异步时域相位光码分多址（OCDMA）系统性能的影响。在高斯波形的情况下

定量分析了OCDMA系统的差拍噪声和多址干扰。采用码长127的Gold序列

得到了切普异步时域相位OCDMA系统的平均误码率性能。结果表明

光脉冲越窄

码字的非周期相关性能越好

这将降低多址干扰和差拍噪声

改善误码率性能。

Abstract

The effects of pulse shape on the chip-asynchronous coherent time-spreading OCDMA system performances are analyzed by the aperiodic cross-correlation function of up-sampled sequence.Under Gaussian waveform assumption

Multiple-Access Interference（MAI） and Beat Noise（BN） of OCDMA are quantitatively evaluated.For 127-chip Gold sequence

the mean BER performance of the system is derived.The results show that the narrower the optical pulse

the better aperiodic cross-correlation properties of the code words will be obtained

thus reducing MAI and BN and improving BER performance.

关键词

光通信光码分多址多址干扰差拍噪声非周期互相关函数

Keywords

optical communicationOCDMAMAIBNaperiodic cross-correlation function

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State Key Laboratory on Integrated Optoelectronics,Department of Electronic Engineering,Tsinghua University

清华大学电子工程系集成光电子学国家重点实验室北京100084

Research Institute of Optoelectronic Engineering,Jinan University

暨南大学光电工程研究所广东广州510632

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