Peak-to-Average Power Ratio Analysis for OFDM-Based Mixed-Numerology Transmissions

In this paper, the probability distribution of the peak to average power ratio (PAPR) is analyzed for the mixed numerologies transmission based on orthogonal frequency division multiplexing (OFDM). State of the art theoretical analysis implicitly assumes continuous and symmetric frequency spectrum o...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2020-02, Vol.69 (2), p.1802-1812
Main Authors: Liu, Xiaoran, Zhang, Lei, Xiong, Jun, Zhang, Xiaoying, Zhou, Li, Wei, Jibo
Format: Article
Language:English
Subjects:
5G mobile communication
Bandwidth
complementary cumulative distribution function (CCDF)
Continuity (mathematics)
Distribution functions
Frequency spectrum
IEEE 802.11 Standard
level-crossing theory
mixed-numerology
OFDM
Orthogonal Frequency Division Multiplexing
PAPR
Peak to average power ratio
Random processes
Resource management
Time signals
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Summary:In this paper, the probability distribution of the peak to average power ratio (PAPR) is analyzed for the mixed numerologies transmission based on orthogonal frequency division multiplexing (OFDM). State of the art theoretical analysis implicitly assumes continuous and symmetric frequency spectrum of OFDM signals. Thus, it is difficult to be applied to the mixed-numerology system due to its complication. By comprehensively considering system parameters, including numerology, bandwidth and power level of each subband, we propose a generic analytical distribution function of PAPR for continuous-time signals based on level-crossing theory. The proposed approach can be applied to both conventional single numerology and mixed-numerology systems. In addition, it also ensures the validity for the noncontinuous-OFDM (NC-OFDM). Given the derived distribution expression, we further investigate the effect of power allocation between different numerologies on PAPR. Simulations are presented and show the good match of the proposed theoretical results.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2019.2960801