WHT联合次优分层迭代PTS算法抑制OFDM信号峰均比  

Suboptimal hierarchical iterative PTS algorithm combining WHT to suppress OFDM signal peak⁃to⁃average ratio

作　　者：丁杰 丁丹 胡博仁 DING Jie;DING Dan;HU Boren(Graduate School,Space Engineering University,Beijing 101416,China;Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China)

机构地区：[1]航天工程大学研究生院,北京101416 [2]航天工程大学电子与光学工程系,北京101416

出　　处：《现代电子技术》2022年第21期7-12,共6页Modern Electronics Technique

摘　　要：部分传输序列(PTS)算法是降低OFDM系统峰均比的有效方式,但由于其计算量随着相位因子数和分割子块数的增加呈指数级增长,故降低计算量成了PTS算法的重要改进方向。经典改进方法如IPTS算法,虽然大幅度降低计算量,但抑制PAPR性能受到了不可忽视的影响。由此在IPTS算法的基础上进行改进,提出次优分层迭代PTS算法,并利用Hadamard矩阵的正交性提出联合WHT的次优分层迭代PTS算法。Matlab仿真结果表明,该算法在计算量略有增加的情况下,抑制PAPR性能与原PTS算法贴近,和IPTS算法相比有明显提升。The partial transmit sequence(PTS)method is an effective way to reduce the peak⁃to⁃average ratio(PAR)of the OFDM(orthogonal frequency division multiplexing)system.However,its calculation amount increases exponentially with the increase of the number of phase factors and the number of divided sub⁃blocks,so the reduction of the amount of calculation has become an important improvement direction of the PTS algorithm.One of the classical improved methods,for example,the IPTS(iterative partial transmit sequence)algorithm,can greatly reduce the amount of calculation,but its PAPR(peak⁃to⁃average power ratio)inhibiting performance has been affected obviously.Therefore,the suboptimal hierarchical iterative PTS algorithm is proposed on the basis of the improvement of IPTS algorithm,and then the suboptimal hierarchical iterative PTS algorithm combining WHT(Walsh⁃Hadamard transform)is proposed by the orthogonality of Hadamard matrix.Matlab simulation result shows that,when the calculation amount is slightly increased,the PAPR inhibiting performance of the proposed algorithm is close to that of the original PTS algorithm,but obviously improved in comparison with that of the IPTS algorithm.

关 键 词：正交频分复用 峰均功率比 部分传输序列(PTS)算法 沃尔什哈达玛变换 迭代PTS算法 Matlab 

分 类 号：TN911.3-34[电子电信—通信与信息系统]