一种改进的LOFDM系统PAPR压扩变换算法  

Modified Companding Algorithm for PAPR Reduction in LOFDM System

作　　者：彭斯明 沈越泓[2] 袁志钢[1] 简伟[1] 苗誉威[2] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]济南军区通信网络技术管理中心,山东济南250001

出　　处：《电视技术》2014年第13期100-102,107,共4页Video Engineering

基　　金：国家自然科学基金项目(60772083;61201242);江苏省自然科学基金项目(BK2012057);解放军理工大学预研基金项目(KTYYZLXY1208)

摘　　要：针对传统压扩变换方法存在计算复杂度较高或设计灵活性不够的问题,推导并提出了一种新的、更为高效的非线性压扩变换改进算法。通过引入适当的参数,简化了压扩变换中功率守恒时的参数计算问题,所提出的方法不仅可以降低计算复杂度,而且系统灵活性也得到进一步的改善。仿真实验表明该算法可在抑制PAPR和保证误码性能之间取得更好的折中。Due to lack of enough design flexibility as well as a relatively high computation complexity, a modified and more effective companding scheme is proposed in this paper. By simplifying the computation of the companding parameters after companding, the proposed scheme can achieve a great improvement in terms of computation complexity as well as the design flexibility. Numerous simulation results confirme that the proposed scheme can achieve a better trade-off between the PAPR reduction and BER performance.

关 键 词：网格多载波系统 峰均功率比(PAPR) 非线性压扩变换 

分 类 号：TN929.11[电子电信—通信与信息系统]