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

• Research and Development •    

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

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

  1. 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)


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: 

No Suggested Reading articles found!