一种双极性啁啾编码光码分多址系统  

An optical CDMA system based on bipolar chirped coding

作　　者：张军[1] 罗斌[1] 潘炜[1] 邱清竹[1] 

机构地区：[1]西南交通大学光通信与光器件研究所,四川成都610031

出　　处：《光电子．激光》2008年第10期1343-1348,共6页Journal of Optoelectronics·Laser

基　　金：教育部科学技术研究重点资助项目(105148)

摘　　要：提出了一种基于线性啁啾布拉格光纤光栅和光纤延迟线的正负啁啾编码光码分多址(OCDMA)方案。建立了系统结构的数学模型,从理论上推导了系统误码率公式;并数值分析了误码率及单用户最大数据速率等系统性能。结果表明,系统误码性能远远优于一维素数码OCDMA系统;在同码长、同误码率情况下,系统在线用户数可达电域中二进制相移键控(BPSK)码分多址系统的两倍。A bipolar chirped optical code division multiple access（OCDMA） schemes, based on a linear chirp fiber Bragg grating and fiber delay line,is proposed in this paper. The mathematical model of the system is established, and the system bit error rate （BER） formula is presented. The system performance,such as BER and the largest single-user data rate,is analyzed. The results show that the system BER in our schemes is much better than that in one-dimensional prime code OCD-MA systems. With the same code length and error rate,the number of online users can be up to twice of that in binary phase shift keying（BPSK） CDMA system in the electronic domain.

关 键 词：光码分多址 双极性编码 啁啾 差分检测 

分 类 号：TN929.11[电子电信—通信与信息系统]