一种基于SQPC/OCS的二维光正交码设计及性能研究

J4 ›› 2015, Vol. 32 ›› Issue (2): 251-256.

• 光通信 • 上一篇

一种基于SQPC/OCS的二维光正交码设计及性能研究

张秀容,李传起,杨梦婕,陈美娟,范庆斌

广西师范大学电子工程学院，广西桂林 541004

收稿日期:2014-05-05 修回日期:2014-05-24 出版日期:2015-03-28 发布日期:2015-03-17
通讯作者: 李传起(1964-)安徽六安人，博士，教授，主要从事物理学及光通信技术领域的科研与教学，主要研究方向为光纤通信OCDMA网络技术。 E-mail:lcq@gxnu.edu.cn。
作者简介:张秀容(1989-)，女，广东清远人，硕士研究生，主要研究光纤通信OCDMA网络技术研究，Email：zxr222022@126.com。
基金资助:
广西高校自然科学基金重点项目(No. 201202ZD010)；桂林科学技术发展项目基金(NO.20120104-18)

A novel two-dimensional optical orthogonal code design and performance analysis based on SQPC/OCS

Zhang Xiurong, Li Chuanqi, Yang Mengjie，Chen Meijuan，Fang Qingbin

Department of Electronic Engineering, Guangxi Normal University, Guilin 541004, China

Received:2014-05-05 Revised:2014-05-24 Published:2015-03-28 Online:2015-03-17

摘要/Abstract

摘要：

以同步二次素数码(SQPC)作为时间扩频序列，单重合序列(OCS)作为波长跳频序列，构造了一种新的二维光正交码SQPC/OCS，并对其误码性能及码字容量进行了理论分析和仿真比较。理论分析表明：在同码长、同波长数条件下，SQPC/OCS与 2D-QPC误码率相等，但SQPC/OCS波长数可以是任何数，不局限于素数，从而增加波长码片可以降低误码率；与EPC/OCS相比，SQPC/OCS误码率更低。SQPC/OCS码字容量远远高于2D-QPC和EPC/OCS码字容量。仿真结果表明：当p=7、q=13时，SQPC/OCS误码率比2D-QPC降低接近2个数量级；当p=11、q=15时，SQPC/OCS与EPC/OCS相比，当用户数为20时，误码率相差达4个数量级。

关键词: 光通信, OCDMA系统, 单重合序列, 误码率, 码容量

Abstract:

A new two-dimensional optical orthogonal code named SQPC/OCS is constructed with SQPC (Synchronous Quadratic Prime Code) as time spreading sequence and OCS (One-coincidence Sequence) as wavelength hopping sequence. The performances of BER (bit error ratio) and word capacity are compared by analyzed and simulated. Theoretical analysis show that SQPC/OCS has the same BER as 2D-QPC(Quadratic Prime Code) when given the same code length and same number of wavelength, but SQPC/OCS can reduce its BER by increased the number of wavelength which is not limited to a prime number. Compared with EPC(Extend Prime Code)/OCS, SQPC/OCS gets lower BER. Moreover, the code capacity of SQPC/OCS is much more than that of 2D-QPC and EPC/OCS. The simulation show that the BER of SQPC/OCS is nearly two orders of magnitude lower and four orders of magnitude lower than that of 2D-QPC(p=7and q=13)and EPC/OCS(p=11 and q=15) while the number of synchronous users equals 20,respectively.

Key words: Optical communication, OCDMA system, OCS, BER, Code capacity

张秀容李传起杨梦婕陈美娟范庆斌. 一种基于SQPC/OCS的二维光正交码设计及性能研究[J]. J4, 2015, 32(2): 251-256.

Zhang Xiurong, Li Chuanqi, Yang Mengjie，Chen Meijuan，Fang Qingbin. A novel two-dimensional optical orthogonal code design and performance analysis based on SQPC/OCS[J]. J4, 2015, 32(2): 251-256.

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一种基于SQPC/OCS的二维光正交码设计及性能研究

A novel two-dimensional optical orthogonal code design and performance analysis based on SQPC/OCS

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