摘要
针对OFDM系统带来峰均较高的缺点,本文主要改进SLM中最优扰码的选取及不同扰码设计的算法。通过分析与比较不同扰码序列对降低PAPR的效果,得出采用OCML产生的时空混沌具有最佳的扰码效果。同时将改进后的SLM算法与限幅技术联合后能有效地弥补单独使用传统SLM限制PAPR不足,传输边带信息的缺点。仿真结果表明改进型的联合算法相比原始信号的PAPR降低了4.4d B,且不会破坏系统的稳定性。
Bring peak were higher for OFDM systems shortcomings,this paper improved SLM scrambling optimal selection and design of algorithms different scrambling codes. By analyzing and comparing different scrambling code sequence PAPR reduction effect obtained using OCML generated spatiotemporal chaos has the best scrambling effect. While the SLM improved algorithm after slicing technology can effectively compensate for joint use of traditional SLM restrictions alone insufficient PAPR,sideband transmission information disadvantage. Simulation results show that the improved algorithm combined with the original signal PAPR compared to reduce 4. 4 d B,and does not undermine the stability of the system.
出处
《科技通报》
2018年第3期110-114,119,共6页
Bulletin of Science and Technology
基金
湖北省自然科学基金资助项目(2014CFB896)
