SAP算法降低OFDM系统PAPR  

SAP algorithm for PAPR reduction in OFDM systems

作　　者：韩硕 李艳萍[1] 萧宝瑾[1] HAN Shuo;LI Yanping;XIAO Baojin(College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin)

机构地区：[1]太原理工大学信息工程学院,山西太原030024

出　　处：《电视技术》2017年第11期74-78,共5页Video Engineering

基　　金：国家自然科学基金项目(61271249)

摘　　要：为了降低OFDM系统峰均功率比(PAPR),提出一种基于改型选择性映射(SLM)与凸集映射星座扩展算法(ACEPOCS)的SAP算法。新算法采用并行组合方式,通过两种算法的分组联合,以较低的复杂度实现了对PAPR抑制能力的优化。在16QAM调制的OFDM系统模型中对新算法的PAPR、复杂度及误码率(BER)性能进行仿真和分析,结果表明,与传统SLM算法和ACE-POCS算法相比,相同条件下,新算法具有更快的收敛速度,更强的PAPR抑制能力,且不增加计算复杂度,具有优异的综合性能。In order to reduce the peak to average power ratio （PAPR） of OFDM systems,a new algorithm （SAP） based on modified SLM and active constellation extension of Projection Onto Convex Sets （ACE-POCS） is proposed.The new algorithm achieves the reduction of PAPR with low complexity through the special combination of the two algorithms.An OFDM system of 16QAM modulation was considered to evaluate the performance of the proposed algorithm.The results show that the convergence rate of SAP algorithm is faster than two known algorithms and the new algorithm is more efficient to reduce the peak-to-average power ratio（PAPR）.Besides,the complexity of the new algorithm does not increase.

关 键 词：正交频分复用 峰均功率比 星座扩展 选择性映射 

分 类 号：TN914[电子电信—通信与信息系统]