不同调制方式混传对光纤通信系统性能的影响  

Influence of mixed modulations on the performance of optical fiber communication system

作　　者：董毅[1] 赵宇波[1] 赵尚弘[1] 田晓飞[1] 盖美庆[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《激光与红外》2012年第4期436-439,共4页Laser & Infrared

摘　　要：为研究相位整形不归零(PSNRZ)调制和差分正交相移键控(DQPSK)调制在与二进制幅移键控(OOK)调制混合传输时系统性能的变化情况,在分析不同信道间交叉相位调制(XPM)影响因素的基础上,通过仿真对10 Gb/s OOK-RZ码分别与40 Gb/s PSNRZ码及DQPSK-RZ码混合传输时的系统性能进行了研究。结果表明,与两种码型单独传输相比,混合传输时的系统性能都明显恶化,而DQPSK系统性能恶化尤为严重,最大传输距离减小高达500 km。In order to study the change of system performance of PSNRZ and DQPSK modulations when transmitting together with OOK modulation,the performance of systems that mixing 10 Gb/s OOK-RZ code respectively with 40 Gb/s PSNRZ code and DQPSK-RZ code is simulated based on the analysis of influence factors of XPM among different channels.The result shows：compared with the case that the two codes transmit independently,the performance of the mixing system deteriorates obviously,especially the DQPSK system.In this case,the transmission distance decreases by more than 500 km.

关 键 词：相位整形不归零码 差分正交相移键控 混传 传输距离 

分 类 号：TN929.1[电子电信—通信与信息系统]