中文摘要：

针对激光器的相位噪声会严重影响相干光正交频分复用（CO-OFDM）系统的性能问题,基于空载波间隔提出了一种适用于CO-OFDM系统的新相位噪声补偿算法,通过空载波来间隔信息子载波,从而有效降低载波间干扰并提高有效信息干扰比。仿真结果表明：与最小平方准则-公共相位误差（LS-CPE）算法相比,该补偿算法能有效地改善系统的误码性能,降低系统对激光器线宽的要求。

英文摘要：

The phase noise will seriously destroy the performance of coherent optical orthogonal frequency-division multiplexing（CO-OFDM）system.Thus a novel phase noise compensation algorithm for CO-OFDM systems was proposed based on the zero-carriers-spacing.This algorithm can effectively reduce the inter-carrier interference（ICI）and improve the signal-tointerference ratio by inserting the zero-carriers to space the information carriers.Simulation results show that the proposed algorithm,compared with the least-squares common-phase-error（LS-CPE）algorithm,can effectively improve the bit error rate（BER）performance of the system and reduce the tolerance requirement of the laser linewidth.