CAJ | 학술논문

建立了多跨距 RZ-DPSK(归零差分相移键控)色散管理波分复用的简并四波混频噪声标准差的理论计算模型,该模型考虑到了比特序列的随机性和脉冲初始相位的随机性两种随机因素的影响。利用该模型进行了实例分析,研究结果表明：平均功率相同的情况下,DPSK调制信号的噪声标准差值比 OOK(开关键控)调制信号的小；比特率的变化对调制信号的噪声标准差值的影响不大；平均功率对调制信号的噪声标准差有很大的影响,随着平均功率的增大,噪声标准差的值呈近似指数形式的增大。
건립료다과거 RZ-DPSK(귀령차분상이건공)색산관리파분복용적간병사파혼빈조성표준차적이론계산모형,해모형고필도료비특서렬적수궤성화맥충초시상위적수궤성량충수궤인소적영향。이용해모형진행료실례분석,연구결과표명：평균공솔상동적정황하,DPSK조제신호적조성표준차치비 OOK(개관건공)조제신호적소；비특솔적변화대조제신호적조성표준차치적영향불대；평균공솔대조제신호적조성표준차유흔대적영향,수착평균공솔적증대,조성표준차적치정근사지수형식적증대。
This paper presents a theoretical model for evaluating the standard deviation of Four-Wave-Mixing (FWM)noise in multi-span dispersion managed WDM systems with Differential Phase-Shift-Keying (DPSK)modulation.This model takes into consideration the effects of the randomness of bit sequence and initial phase of the pulses in each channel.Using this model,it analyzes some practical cases.The results show that with the same average power,the noise deviation ratio of DPSK modula-ted signals is smaller than that of On-Off Keying (OOK)modulated signals,that the variations of bit rates have little effect on the noise deviation value of the DPSK modulated signals,while the average power has great influence.With the increase of the latter,the voice deviation value increases almost exponentially.