抑制LOFDM系统PAPR非线性压扩变换算法

彭斯明; 沈越泓; 袁志钢; 苗誉威; 简伟

doi:10.11959/j.issn.1000-436x.2015079

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抑制LOFDM系统PAPR非线性压扩变换算法

学术论文 | 更新时间：2024-06-05

- 抑制LOFDM系统PAPR非线性压扩变换算法
- Nonlinear companding transform for PAPR reduction in lattice-OFDM system
- 通信学报 2015年36卷第3期页码：232-239
- 作者机构：
  
  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 250002
- 作者简介：
  
  [ "彭斯明（1990-），男，湖北天门人，解放军理工大学硕士生，主要研究方向为多载波信号处理及优化算法等。" ]
  [ "沈越泓（1959-），男，上海人，解放军理工大学教授、博士生导师，主要研究方向为无线通信系统、通信抗干扰、盲源分离技术等。" ]
  [ "袁志钢（1980-），男，河北石家庄人，博士，解放军理工大学讲师，主要研究方向为多载波信号优化与传输技术等。" ]
  [ "苗誉威（1981-），男，山东济南人，济南军区通信网络技术管理中心工程师，主要研究方向为通信网络优化与处理等。" ]
  [ "简伟（1976-），男，河南永城人，博士，解放军理工大学讲师，主要研究方向为通信抗干扰、多载波信号设计与优化技术等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(60772083);国家自然科学基金资助项目(61201242);江苏省自然科学基金资助项目(BK2012057);解放军理工大学预研基金资助项目(KYTYZLXY1208)
- DOI：10.11959/j.issn.1000-436x.2015079
  中图分类号： TN919.72
- 网络首发：2015-03，
  
  纸质出版：2015-03-25
- 稿件说明：
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彭斯明, 沈越泓, 袁志钢, 等. 抑制LOFDM系统PAPR非线性压扩变换算法[J]. 通信学报, 2015,36(3):232-239.

Si-ming PENG, Yue-hong SHEN, Zhi-gang YUAN, et al. Nonlinear companding transform for PAPR reduction in lattice-OFDM system[J]. Journal of Communications, 2015, 36(3): 232-239.
彭斯明, 沈越泓, 袁志钢, 等. 抑制LOFDM系统PAPR非线性压扩变换算法[J]. 通信学报, 2015,36(3):232-239. DOI： 10.11959/j.issn.1000-436x.2015079.

Si-ming PENG, Yue-hong SHEN, Zhi-gang YUAN, et al. Nonlinear companding transform for PAPR reduction in lattice-OFDM system[J]. Journal of Communications, 2015, 36(3): 232-239. DOI： 10.11959/j.issn.1000-436x.2015079.

摘要

针对网格正交频分复用(LOFDM

lattice OFDM)系统具有较传统OFDM系统更高峰均功率比(PAPR

peak-to-average power ratio)的问题，在将传统非线性压扩变换应用于LOFDM系统的同时研究并分析了一种新的基于原信号统计分布特性的连续可导非线性压扩算法。该算法从原信号的渐进高斯分布特性出发并对原信号的幅度分布函数进行截断逼近，在保持平均功率不变的条件下，将压扩后的信号限制在与原信号分布特性一致的特定范围内，使压扩后的信号在保持其原有分布特性的同时，能更大程度改善系统PAPR和误比特(BER

bit error ratio)性能。理论分析和仿真实验表明，所提出的算法性能要显著优于传统非线性压扩算法。

Abstract

Since the inherent higher peak-to-average power ratio (PAPR) in lattice OFDM (LOFDM) is higher than that of conventional OFDM systems

a novel continuous and differentiable nonlinear companding scheme is investigated and analyzed when employing the conventional companding transforms. By making full use of the characteristic of the Gaus-sian-distributed original signals and employing a truncation to the distribution function of the original signals

the com-panded signals can be restricted in a specific region which consistents with the distribution of original signals. Therefore

the companded signals can not only achieve an improved PAPR and bit error ratio (BER) performance but also maintain the statistical characteristics of the original signals. Theoretical analysis and simulation results demonstrate that the pro-posed scheme substantially outperforms the conventional nonlinear companding schemes.

关键词

Keywords

references

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