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。

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tointerference 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.