一种低复杂度OFDM峰均比降低方法  

Low complexity method for PAPR reduction of OFDM signals

作　　者：温鸿航[1] 葛建华[1] 许唐雯[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2015年第5期188-193,共6页Journal of Xidian University

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB316100)

摘　　要：针对部分传输序列方法搜索复杂度会随着分组呈指数增长的问题,给出了基于免疫进化搜索的算法来降低部分传输序列方法的复杂度.采用量子比特表示各分组状态,用免疫算法在搜索过程中抑制退化,增加群体适应度,并采用六边形星座消除边带信息.计算机仿真结果表明,该方法计算复杂度较部分传输序列方法明显减小,较同类方法有更好的正交频分复用峰均比性能表现,且无需额外传输边带信息.Partial transmit sequences（PTS）search complexity increases exponentially with the number of subblocks.To solve this problem,a novel immune quantum evolutionary PTS scheme is proposed to reduce computational complexity and improve PAPR performance.In this scheme,a Q-gate is introduced to drive the individuals toward better solutions,the evolutionary mechanism restrains degeneracy and increases the fitness of population,and a specially hexagonal constellation is used to eliminate side information.Simulation results indicate that the conventional PTS is more complicated than the proposed strategy,and that the proposal shows better performance without additional transmit sideband information than similar other solutions.

关 键 词：多载波调制 正交频分复用 峰均功率比 量子计算 进化算法 

分 类 号：TN919.3[电子电信—通信与信息系统]