OFDM系统中基于SR迭代和RSG-KG的PAPR降低  

PAPR reduction based on SR iteration and RSG-KG in OFDM system

作　　者：王晋晋 尚展垒 王康康 Wang Jinjin;Shang Zhanlei;Wang Kangkang(Henan Forestry Vocational College,Luoyang 471002 China;College of Computer and Communication Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;School of Mechanical and Electrical Engineering,Zhengzhou Vocational University of Information and Technology,,Zhengzhou 455000,China;School of Mechanical and Electrical Engineering,Henan Open University,Zhengzhou 455000,China)

机构地区：[1]河南林业职业学院,洛阳471002 [2]郑州轻工业大学计算机与通信工程学院,郑州450002 [3]郑州信息科技职业学院机电工程学院,郑州455000 [4]河南开放大学机电工程学院,郑州455000

出　　处：《国外电子测量技术》2022年第6期45-51,共7页Foreign Electronic Measurement Technology

基　　金：河南省科技攻关项目(212102210163)资助。

摘　　要：针对采用正交频分复用的通信系统中的峰值平均功率比(PAPR)降低进行了研究。首先,在对基于子载波预留(SR)的传统削波算法分析的基础上,提出了一种基于SR迭代的时域方法来降低PAPR,通过一组类似脉冲的内核迭代地抵消信号峰值;为了克服基于SR迭代算法存在增大信号平均功率的缺点,然后又提出了一种基于预留子载波分组-内核生成的PAPR降低方法,即将预留子载波分组,然后从每组预留子载波中生成一个类似脉冲的内核信号,从而既可实现PAPR降低,又可控制每个预留子载波的功率变化;最后采用现场可编程门阵列实现了所提出的算法。仿真实验结果表明,提出的PAPR降低算法不仅在PAPR降低增益和误码率性能方面优于传统的削波算法,而且有较好的平均功率变化控制和功率谱掩模能力。The peak to average power ratio(PAPR)reduction in orthogonal frequency division multiplexing communication systems is studied.Firstly,based on the analysis of the traditional clipping algorithm based on subcarrier reservation(SR),a time-domain method based on SR iteration is proposed to reduce PAPR,in which the signal peak is iteratively canceled by a group of impulse-like kernels.In order to overcome the disadvantage of increasing the average power of the signal due to iteration algorithm based on SR,a PAPR reduction method based on reserved subcarriers grouping-kernel generation is proposed,namely,the reserved subcarriers are grouped,and then a kernel signal similar to pulse is generated from each group of reserved subcarriers.Thus,PAPR reduction can be realized,and the power variation of each reserved subcarrier can be controlled.Finally,the proposed algorithm is implemented by field programmable gate array.Simulation results show that the proposed PAPR reduction algorithm is not only superior to the traditional clipping algorithm in terms of PAPR reduction gain and bit error rate performance,but also has better average power variation control and power spectral mask capability.

关 键 词：正交频分复用系统 峰值平均功率比 子载波预留 削波 内核生成 迭代 降低增益 

分 类 号：TN929.53[电子电信—通信与信息系统]