基于全程耦合映像格子的OFDM系统性能改进算法  

Performance improvement algorithm of OFDM system based on GCML

作　　者：竟诗琦 陈朝[1] 苏宇航 Jing Shiqi;Chen Zhao;Su Yuhang(School of Mechanical and Electronic Information,China University of Geosciences,Wuhan 430000,China)

机构地区：[1]中国地质大学(武汉)机械与电子信息学院,湖北武汉430000

出　　处：《电子技术应用》2020年第7期99-103,共5页Application of Electronic Technique

基　　金：装备预研教育部联合基金项目(20180700501);航天科学技术基金项目(20190700401)。

摘　　要：作为仍将在5G中发挥重要作用的正交频分复用技术(Orthogonal Frequency Division Multiplexing,OFDM),由于存在峰均比较高的问题将限制其进一步发展。SLM算法作为降低峰均比的重要手段,仍存在带外干扰及高峰值无法完全滤除等缺点。针对上述问题,提出了基于全程耦合映像格子(Globally Couple Map Lattices,GCML)的SLMRCF联合算法,该算法充分利用GCML良好的相关性、正交性及非周期性对SLM算法进行改进,提高其抗干扰的能力,并结合迭代限幅滤波算法进一步滤除较高的峰值。理论分析和仿真结论显示,利用联合算法能够降低带外干扰的影响进一步降低峰均比,同时能够降低系统误码率,提高系统的可靠性。Orthogonal Frequency Division Multiplexing(OFDM),as a technology that will still play an important role in 5G,will be restricted to its further development due to its high PAPR.SLM algorithm is an important means to reduce PAPR,but it still has some shortcomings such as out-of-band interference and high peak value can′t be completely filtered out.In view of the above problems,a SLM-RCF combined algorithm based on GCML is proposed in this paper,the algorithm makes full use of the good correlation,orthogonality and aperiodicity of GCML to improve SLM algorithm to improve its anti-interference ability,and combines with the RCF algorithm to further filter out high peak value.Theoretical analysis and simulation results show that the combined algorithm can reduce the influence of out-of-band interference and further reduce the PAPR,at the same time,it can reduce the system bit error rate,and improve the reliability of system.

关 键 词：正交频分复用 峰均比 选择性映射 全程耦合映像格子 

分 类 号：TN929.5[电子电信—通信与信息系统]