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

Abstract

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

CLC Number:

TN919

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.

Figures/Tables 15

References 24

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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

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

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