混合参数集多载波系统的峰均比抑制方法研究

doi:10.11959/j.issn.1000-0801.2023194

电信科学 ›› 2023, Vol. 39 ›› Issue (10): 1-14.doi: 10.11959/j.issn.1000-0801.2023194

• 研究与开发 •

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

国防科技大学电子科学学院，湖南长沙 410073

修回日期:2023-10-12 出版日期:2023-10-01 发布日期:2023-10-01
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
基金资助:
国家自然科学基金资助项目(62101569);湖南省自然科学基金资助项目(2022JJ30047)

A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems

Nan SHI, Xiaoran LIU, Jun XIONG, Xiaoying ZHANG, Jibo WEI

College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China

Revised:2023-10-12 Online:2023-10-01 Published:2023-10-01
Supported by:
The National Natural Science Foundation of China(62101569);The Natural Science Foundation of Hunan Province(2022JJ30047)

摘要/Abstract

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。

关键词: 混合参数集, 峰均比, 时域核脉冲, 预留子载波

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.

Key words: mixed-numerology, peak-to-average power ratio, time-domain kernel, tone reservation

中图分类号:

TN919

石楠, 刘潇然, 熊俊, 张晓瀛, 魏急波. 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, Xiaoying ZHANG, Jibo WEI. A peak-to-average power ratio reduction method for mixed-numerology multi-carrier systems[J]. Telecommunications Science, 2023, 39(10): 1-14.

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参数集	信号带宽	FFT点数	预留子载波数	符号数	调制方式	CP长度比例
参数集1	10 MHz	256	32	1 000	16-QAM	0.125
参数集2	10 MHz	128	16	2 000	16-QAM	0.125

算法	MTK	NS-ICF	求最优解
平均运行时间/ms	10	11	1 560

算法	子信号1	子信号2
MTK算法	-11.08 dB	-11.06 dB
抑制子信号PAPR	-10.57 dB	-10.33 dB
NS-ICF算法	-9.46 dB	-9.45 dB

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

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