OFDM系统中最大似然调制识别算法研究  

Research on Maximum-Likelihood Modulation Identification Algorithms for OFDM Systems

作　　者：梁伟洋[1] 许世宏[1] 

机构地区：[1]空军第一航空学院,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2016年第4期604-607,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11405270)

摘　　要：对观测样本进行非线形变换,提出了基于子载波和子载波组的OFDM系统最大似然调制识别算法,解决了载波频偏引起最大似然调制识别算法性能急剧下降的问题.仿真结果表明,当归一化频偏小于0.15时,该算法具有良好的识别性能.By the non-linear transformation to the observation sample,the modified sub-carrier and subband based modulation identification algorithms for OFDM system were presented.The effect of frequency offsets on the performance of the maximum likelihood identification algorithm was eliminated by the transformation.The simulation results showed that the algorithm had better performance as the normalize frequency offsets was less than 0.15.

关 键 词：OFDM系统 调制识别 最大似然识别 子载波. 

分 类 号：TN911[电子电信—通信与信息系统]