CSRZ-DQPSK在长距离WDM-PON系统的性能研究

发布时间：2018-04-14 14:34

本文选题：差分正交相移键控 + 偏振膜色散　；参考：《郑州大学学报(理学版)》2015年04期

【摘要】：在长距离光通信系统中,差分相移键控(differential phase shift keying,DPSK)调制和解调技术是针对色散补偿而提出的一种技术方案.其中差分正交相移键控(differential quadrature reference phase shift keying,DQPSK)技术通过采用不同的调制技术如非归零(non-return to zero,NRZ)、归零(return to zero,RZ)、载波抑制归零(carrier suppressed return to zero,CSRZ)调制.但由于差分相移键控的频谱功率较低,误码率更高高,噪声干扰更大等缺点.提出了载波抑制归零-差分正交相移键控(CSRZ-DQPSK)调制方式,具有更好的抗色散和抗偏振膜色散的能力,它可以弥补差分相移键控的缺点.以眼图张开代价(EOP)、眼图和误码率(BER)作为性能评价指标,研究了这3种调制格式对色散(chromatic dispersion,CD)、偏振膜色散(polarization mode dispersion,PMD)和非线性效应的抑制作用.经测试CSRZ-DQPSK调制方式的功率损耗相对较低,具有更窄的频谱,在色散容限与非线性效应容忍度方面具有很大提升,性能更加优越.因此可作为长距离波分复用无源光网络(wavelength division multiplexing-passive optical network,WDM-PON)的一个简单高效的方案.
[Abstract]:In long distance optical communication systems, differential phase shift keying (DPSK) modulation and demodulation are proposed for dispersion compensation.Among them, differential quadrature reference phase shift keying (DQPSK) is modulated by using different modulation techniques such as non-return to zero NRZs, zero return to zeroor RZs, carrier suppression return-to-zero carrier suppressed return to zeroCSRZs.However, differential phase shift keying (DPSK) has many disadvantages, such as lower spectrum power, higher bit error rate and greater noise interference.In this paper, a carrier suppression ZERZ-DQPSK modulation scheme is proposed, which has better ability of anti-dispersion and anti-polarization film dispersion, and it can make up for the shortcoming of differential phase-shift keying.The effects of these three modulation schemes on dispersion chromatic dispersion (CDD), polarization mode dispersion (PMD) and nonlinear effects were studied using eye opening cost, ophthalmogram and bit error rate (BER) as performance evaluation indexes.The power loss of CSRZ-DQPSK modulation is relatively low, the spectrum is narrower, the dispersion tolerance and nonlinear effect tolerance are greatly improved, and the performance is better.Therefore, it can be used as a simple and efficient scheme for wavelength division multiplexing-passive optical network (WDM-PON) in long distance wavelength division multiplexing (LWDM).
【作者单位】：安阳工学院电子信息与电气工程学院;
【基金】：国家自然科学基金河南省人才培养联合基金资助项目,编号U1204613 河南省级科技攻关项目,编号122102210017 河南省教育厅科学技术研究重点项目,编号15A510017
【分类号】：TN929.1

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