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基于正交频分复用(OFDM)与波分复用(WDM)的基本原理,构建了一套基于OFDM技术的WDM传输系统的系统模型,并对其相关系统性能进行了理论分析。基于维纳相位噪声模型,文章对OFDM系统中相位噪声引起的公共相位误差和子载波间干扰进行了分析,在此基础上深入分析了基于交叉复用OFDM技术的OFDM子载波间干扰的消除方法,降低相位噪声对系统性能的影响。最后结合理论分析结果对系统模型的相关性能进行模拟计算,分析结果表明:采用交叉复用OFDM技术在降低相位噪声对OFDM系统性能的影响的同时,提高了系统的信号处理能力。
Based on the basic principles of Orthogonal Frequency Division Multiplexing (OFDM) and Wavelength Division Multiplexing (WDM), a system model of WDM transmission system based on OFDM technology is constructed and its related system performance is analyzed theoretically. Based on the Wiener phase noise model, the paper analyzes the common phase error caused by phase noise in OFDM system and the inter-subcarrier interference. Based on the analysis, the method to eliminate the inter-subcarrier interference based on OFDM technology is analyzed. Reduce the impact of phase noise on system performance. Finally, the theoretical analysis results are used to simulate the performance of the system model. The results show that the OFDM technology can reduce the influence of phase noise on the performance of OFDM system and improve the signal processing capability of the system.