一种高频段正交频分复用系统中相位噪声消除算法  

An Algorithm for Phase Noise Mitigation in High-Frequency OFDM

作　　者：杜文[1] 蒋铃鸽[1] 何晨[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《上海交通大学学报》2011年第7期1058-1062,共5页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2009AA011505);国家自然科学基金资助项目(60772100)

摘　　要：针对高频段正交频分复用(OFDM)无线通信中相位噪声功率增加导致系统性能降低,提出了一种低导频开销的相位噪声消除算法.通过分析高频段OFDM系统信道传递函数和相位噪声特性,在OFDM导频时隙上同时估计信道传递函数与相位噪声;在导频子载波假定信道不变,连续估计相位噪声以抑制相位噪声引起的载波间干扰.仿真结果表明,在大相位噪声下,该算法降低了导频开销,同时有效消除相位噪声,提高了信道传递函数估计的准确度.The increasing of phase noise in high-frequency orthogonal frequency division multiplexing wireless communication system degrades the system performance.A joint channel transfer function and phase noise estimation algorithm with low pilot consumption was proposed to resolve the conflict.By analyzing the characteristics of channel transfer function and phase noise,the algorithm is divided into two steps： on OFDM pilot time-slot,estimate channel transfer function and phase noise;on pilot sub-carriers,estimate phase noise continuously to eliminate inter-carrier interference caused by it,assuming the channel is constant.The simulation results show that the proposed algorithm can eliminate phase noise effectively in a heavy phase noise condition.

关 键 词：高频段 正交频分复用 相位噪声 载波间干扰 

分 类 号：TN911.4[电子电信—通信与信息系统]