中文摘要：

为补偿CO-OFDM系统中相位噪声引起的干扰,提出了一种改进的基于线性内插的相位噪声补偿算法。该算法利用共轭导频估计相位噪声的均值,然后通过线性内插获得相位噪声的估计值,最后通过频域补偿来恢复出调制信号。此外针对求幅角的非线性运算中存在的相位周跳的问题,文章提出的修正方法能够有效地改善周跳情况的发生。分析与仿真表明：该算法在不同线宽条件下均能提升一定的SNR增益且算法的复杂度低。

英文摘要：

In order to compensate the interference from the phase noise in CO-OFDM systems, an improved phase noise compensation algorithm based on linear interpolation was proposed. The algorithm uses conjugate pilots to estimate the mean of the phase noise, and then the mean phase noise is estimated by the linear interpolation. Finally, the modulation symbols is recovered by the frequency domain compensation. Moreover, aiming at the problem of the phase cycle slip caused by the nonlinear operation in the process of computing angle, the proposed method can effectively improve the occurrence of the cycle slip. Analysis and simulation results show that the proposed algorithm can improve the SNR gain under various linewidths and decrease the complexity.