混合参数集多载波系统的峰均比抑制方法研究

石楠; 刘潇然; 熊俊; 张晓瀛; 魏急波

doi:10.11959/j.issn.1000-0801.2023194

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混合参数集多载波系统的峰均比抑制方法研究

研究与开发 | 更新时间：2024-06-05

- 混合参数集多载波系统的峰均比抑制方法研究
- A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems
- 电信科学 2023年39卷第10期页码：1-14
- 作者机构：
- 作者简介：
  
  [ "石楠（1995- ），男，国防科技大学电子科学学院硕士生，主要研究方向为无线通信理论、智能无线通信与网络" ]
  [ "刘潇然（1992- ），男，博士，国防科技大学电子科学学院讲师，主要研究方向为无线通信信号处理、多载波波形设计和智能通信技术" ]
  [ "熊俊（1987- ），男，博士，国防科技大学电子科学学院副研究员、硕士生导师，主要研究方向为协同通信、物理层安全和网络资源分配等" ]
  [ "张晓瀛（1980- ），女，博士，国防科技大学电子科学学院副教授，主要研究方向为无线信道建模、宽带无线通信" ]
  [ "魏急波（1967- ），男，博士，国防科技大学电子科学学院教授、博士生导师，主要研究方向为无线通信网络协议、通信信号处理、协同通信、认知无线电网络等" ]
- 基金信息：
  
  国家自然科学基金资助项目;The National Natural Science Foundation of China(62101569);湖南省自然科学基金资助项目;The Natural Science Foundation of Hunan Province(2022JJ30047)
- DOI：10.11959/j.issn.1000-0801.2023194
  中图分类号： TN919
- 网络出版日期：2023-10，
  
  纸质出版日期：2023-10-20
- 稿件说明：
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石楠, 刘潇然, 熊俊, 等. 混合参数集多载波系统的峰均比抑制方法研究[J]. 电信科学, 2023,39(10):1-14.

Nan SHI, Xiaoran LIU, Jun XIONG, et al. A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems[J]. Telecommunications science, 2023, 39(10): 1-14.
石楠, 刘潇然, 熊俊, 等. 混合参数集多载波系统的峰均比抑制方法研究[J]. 电信科学, 2023,39(10):1-14. DOI： 10.11959/j.issn.1000-0801.2023194.

Nan SHI, Xiaoran LIU, Jun XIONG, et al. A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems[J]. Telecommunications science, 2023, 39(10): 1-14. DOI： 10.11959/j.issn.1000-0801.2023194.

摘要

为了满足多样化场景下的通信需求，5G采用了以正交频分复用（orthogonal frequency division multiplexing，OFDM）技术为基础的混合参数集系统。该系统将具有不同子载波间隔和循环前缀长度的OFDM符号在频域进行复用，同时服务不同场景下的用户。混合参数集系统中峰均比（peak-to-average power ratio，PAPR）过高的问题仍然存在，并且不同参数子信号叠加生成混合信号这一设计结构使得传统OFDM的PAPR抑制方法难以直接应用。基于预留子载波技术建立了混合参数集系统最小化 PAPR 的优化模型。利用时域核脉冲的单峰特性，根据混合信号的峰值位置同时在不同参数集中产生多个副本，之后叠加生成混合时域核脉冲进行峰值抵消。所提算法不需要在迭代中进行快速傅里叶逆变换（inverse fast Fourier transform，IFFT）/快速傅里叶变换（fast Fourier transform，FFT）操作，具有较低的计算复杂度。仿真结果表明，该算法有效降低了混合信号的PAPR。

Abstract

In order to support diverse service demands of communication scenarios

5G adopts the mixed-numerology system based on orthogonal frequency division multiplexing (OFDM).The mixed-numerology systems still have the problem of high peak-to-average power ratio (PAPR).Furthermore

its design structure makes it difficult to apply traditional PAPR suppression methods straight forwardly

in which mixed signals are generated by superimposing multiple sub-signals with different parameters.An optimization model for minimizing PAPR in mixed-numerology systems was established based on tone reservation method.Utilizing the characteristic of single-peak of time-domain kernel

the multiple copies were generated in different numerologies based on the peak position of the mixed signal.The mixed time-domain kernel was then superimposed to reduce the peaks of the mixed signal.Since the proposed algorithm didn’t require inverse fast Fourier transform (IFFT)/ fast Fourier transform (FFT) operations during iteration

it had relatively low computational complexity.Simulation results show that the proposed algorithm effectively reduces the PAPR of mixed signals.

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references

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