次随机分块PTS-Clipping峰均比抑制算法  

PTS-Clipping peak to averagepower ratio suppression algorithm by sub random segmentation

作　　者：徐湛[1] 刘鹏成 董大年 XU Zhan;LIU Pengcheng(School of Information and Communication Engineering, Beijing Information Science ＆ Technology University, Beijing 100101, China)

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101

出　　处：《电视技术》2018年第2期25-28,33,共5页Video Engineering

基　　金：国家自然科学基金资助项目(61402044);北京市科技新星计划资助项目(Z161100004916086);北京市优秀人才资助计划青年拔尖项目(2016000026833ZK08);北京市属高校高水平教师队伍建设支持计划"青年拔尖人才培养计划"(CIT&TCD201704065);北京信息科技大学科技创新服务能力建设项目资助(71F1810921)

摘　　要：针对正交频分复用信号存在高峰均比问题,本文提出了一种基于次随机分块的部分传输序列(partial transmit sequence,PTS)与传统限幅剪切联合处理的峰均比抑制算法。该算法在时域得到随机分块的子块序列,子块序列乘以相位旋转因子得到多个备选序列,从多个备选序列中寻找低峰值OFDM信号,最后利用频域滤波剪切算法限幅。仿真结果表明,所提算法在低复杂度下可以有效降低PAPR。Aiming at the high peak to average ratio（ PAPR） problem in orthogonal frequency division multiplexing（ OFDM）signals,a PAPR suppression algorithm based on the sub random block partial transmit sequence（ PTS） and the traditional limit clipping is proposed. Firsly,the random sub-block sequences in time domain is obtained. Then the sub-block sequences are multiplied by the phase rotation factor to obtain multiple alternative sequences,and a low peak OFDM signal is selected. Finally,amplitude is clipped using a low pass filter in frequency domain. Simulation results show that the proposed method can effectively reduce the PAPR with low complexity.

关 键 词：正交频分复用 峰均比 部分传输序列 

分 类 号：TN929.534[电子电信—通信与信息系统]