摘要
分析了CO-OFDM(相干光正交频分复用)系统中各个子载波之间的序列相关性对系统性能的影响,并提出了使用SLM(选择映射)法结合限幅算法来降低CO-OFDM各个子载波之间的序列相关性,抑制系统中FWM(四波混频)效应导致的损伤,以提高CO-OFDM系统性能。理论分析和仿真结果表明,该方法在误码率为10-3的情况下,与SLM法和限幅算法相比,灵敏度分别提高约1.8和3.4dB。
On the basis of analyzing the effects of the serial correlation among the subcarriers of the CO-OFDM system on its performances,this paper proposes a new approach,in which the SeLected Mapping （SLM）method and the clipping method are combined.This approach optimizes the subcarrier serial correlation and mitigates the Four-Wave Mixing （FWM）effects that are mainly dependent on the former,thus improving the system performance.Theoretical analysis and MATLAB simulation results show that compared with SLM and clipping methods,this approach improves the sensitivity by about 1 .8 and 3.4 dB respectively at the BER of × 10-3 .
出处
《光通信研究》
北大核心
2013年第5期19-20,33,共3页
Study on Optical Communications
