光8DPSK调制原理及仿真_陈飞.pdf

2008 5 2008 ( 149 ) S T U D Y O N OPT ICA L CO M M U N ICA T IO N S ( Su m N o 149) 光8DPSK 调制原理及仿真 , , , ( 北京邮电大学 理学院光通信与光波技术教育部重点实验室, 北京 100 876) : 光8DPSK ( o pt ical Diff er ent ial 8- Ph ase Shift Key ing) 是一种多级相位调 新码型, 是光通信领域研究的前沿, 文章介绍 了光8DP SK 调 格式原理和调 解调方式, 用 M atlab 做了仿真, 绘 出了频谱图眼图, 并对占空比为 0 5 的R Z- 8DP SK 信 号做了详细分析, 调 和解调了 64 个伪随机码序列, 仿真绘 了光脉冲时序图相位差图和平衡接收后的电信号时序图 : 光8DPSK ; 相位调 ; 光纤通信 : T N9 15 : A : 1005- 8788( 2008) 05- 0006- 04 The modulation principle of optical differential 8- phase shift keying and its simulation Chen Fei, Liu Huiyang, Lu Ping, Zhang Xiaoguang ( T he Schoo l o f Nat ur al Science, Beijing U niversit y of P ost s and T eleco mmunication s, K ey L abo rato ry of O ptical Communicat ion and L ig htw av e T echnolog ies, the M inistr y o f Edu cat ion , Beijing 100876 , China) Abstract A s a new mult-i ph ase mo dulat ion keying , optical D iff erential 8- Ph ase Shift Key ing ( 8DPSK ) is a subject in the mo st advanced research f ield of o ptica l co mmunication s T his pap er intro du ces the modulatio n f or m at pr inciple of optical 8DPSK and the w ay o f it s mo dulat ion and demodulatio n W ith the help o f M atlab , w e simulate 8D PSK modulation and demo dulat ion ; draw the sp ect rum diag ram and eye diag ram and m ake detailed analy sis o f t he RZ- 8DPSK signal s w ith a duty cir cle of 0 5, modulate and demo dulate 64 P RBS sig nals, dr aw the optical pul se sequ ence diag ram , phase- diff erence diagr am and the electr ical sig nal sequence diag ram after b alanced reception Key works optical 8DPSK ; ph ase modulation ; f iber- optic communication 8DPSK ( Opt ical Diff erent ial 8