Genetic Algorithm Based Bilayer PTS Scheme for Peak-to-Average Power Ratio Reduction of FBMC/OQAM Signal

Partial transmit sequence (PTS) scheme has been well applied to reduce the high peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signal. However, due to the signal structure differences between the filter bank multicarrier and offset quadrature amplitude mo...

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Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.17945-17955
Main Authors: Lv, Siying, Zhao, Junhui, Yang, Lihua, Li, Qiuping
Format: Article
Language:English
Subjects:
Attenuation
Bilayer partial transmit sequence (PTS)
Complexity
Computational complexity
filter bank multicarrier and offset quadrature amplitude modulation (FBMC/OQAM)
Filter banks
genetic algorithm (GA)
Genetic algorithms
Monolayers
Nonlinear distortion
Orthogonal Frequency Division Multiplexing
Partial transmit sequences
Peak to average power ratio
peak-to-average power ratio (PAPR) reduction
Prototypes
Quadrature amplitude modulation
Reduction
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Summary:Partial transmit sequence (PTS) scheme has been well applied to reduce the high peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signal. However, due to the signal structure differences between the filter bank multicarrier and offset quadrature amplitude modulation (FBMC/OQAM) signal and the OFDM signal, the conventional PTS scheme is not applicable to the FBMC/OQAM signal. Considering the PAPR reduction issue for the FBMC/OQAM signal, this paper proposes a genetic algorithm (GA) based bilayer partial transmit sequence (GA-BPTS) scheme. In order to reduce the computational complexity, the proposed scheme continues to partition each subblock, transforming the single layer structure of the conventional PTS into a bilayer phase factor search structure, and introduces a penalty threshold. Then the suboptimal phase factor vector is obtained by using the GA. Meanwhile, before PAPR reduction processing, aided by the proposed prototype filter which has the better performance of out-of-band attenuation than the PHYDAYS filter, the GA-BPTS scheme can effectively reduce the PAPR of the FBMC/OQAM signal. The simulations have confirmed that the proposed scheme not only provides an excellent PAPR performance but also decreases the computational complexity compared with the conventional PTS scheme.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2967846