New low-complexity segmentation scheme for the partial transmit sequence technique for reducing the high PAPR value in OFDM systems

Jawhar, Yasir Amer; Ramli, Khairun Nidzam; Taher, Montadar Abas; Shah, Nor Shahida Mohd; Audah, Lukman; Ahmed, Mohammed; Abbas, Thamer

doi:10.4218/etrij.2018-0070

Cited by 19 publications

(13 citation statements)

References 31 publications

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“…In general, in multicarrier systems such as OFDM, the baseband signal is passed to the IFFT unit to modulate the subcarriers by the data symbol. Therefore, the OFDM signal is expressed as [27]:…”

Section: Papr Problemmentioning

confidence: 99%

Improving PAPR performance of filtered OFDM for 5G communications using PTS

et al. 2020

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The filtered orthogonal frequency division multiplexing (F-OFDM) system has been recommended as a waveform candidate for fifth-generation (5G) communications.The suppression of out-of-band emission (OOBE) and asynchronous transmission are the distinctive features of the filtering-based waveform frameworks. Meanwhile, the high peak-to-average power ratio (PAPR) is still a challenge for the new waveform candidates. Partial transmit sequence (PTS) is an effective technique for mitigating the trend of high PAPR in multicarrier systems. In this study, the PTS technique is employed to reduce the high PAPR value of an F-OFDM system. Then, this system is compared with the OFDM system. In addition, the other related parameters such as frequency localization, bit error rate (BER), and computational complexity are evaluated and analyzed for both systems with and without PTS. The simulation results indicate that the F-OFDM based on PTS achieves higher levels of PAPR, BER, and OOBE performances compared with OFDM. Moreover, the BER performance of F-OFDM is uninfluenced by the use of the PTS technique.

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Section: Papr Problemmentioning

confidence: 99%

Improving PAPR performance of filtered OFDM for 5G communications using PTS

et al. 2020

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“…There are various categories of subblock partitioning methods [31]- [34]. Among them, the three most common categories are adjacent, interleaving and random partitioning methods [25].…”

Section: Papr Reduction With Pts and Pts-as A Conventional Ptsmentioning

confidence: 99%

Low-Complexity Partial Transmit Sequence Methods Using Dominant Time-Domain Samples for Multicarrier Faster-Than-Nyquist Signaling

2019

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In Multicarrier faster-than-Nyquist (MFTN) systems, one of the most important problems of MFTN signaling is high peak-to-average power ratio (PAPR). In this paper, partial transmit sequence (PTS) method is adopted to resolve this problem, and we focus on reducing the computational complexity of it. First, the PTS method combined with alternative signal (AS) is introduced to overcome the overlapping structure of MFTN signaling. Then, due to the dominant time-domain samples of MFTN signaling are used, a new metric which can select dominant time-domain samples accurately is proposed. Based on that, two low-complexity PTS methods are proposed. To further reduce the computational complexity, by analyzing the position distribution of sample with peak power, part of the samples are removed from the procedure of calculating metric for selecting dominant time-domain samples. Simulation results confirm that the proposed low-complexity PTS methods can effectively reduce computational complexity without degrading the PAPR reduction performance. INDEX TERMS Multicarrier faster-than-Nyquist (MFTN), peak-to-average power ratio (PAPR), partial transmit sequence (PTS), dominant time-domain samples. AIJUN LIU received the B.S. degree in microwave communications and the M.S. and Ph.D. degrees in communications engineering and information systems from the

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“…The computational complexity for finding the optimum phase factor This computational complexity is because of performing the phase rotation factors in the time-domain, and it rises exponentially with increment the number of the subblocks. The Cadd and Cmult operations can be expressed as [25] 1 add…”

Section: The Computational Complexity Of Ifft Performingmentioning

confidence: 99%

A New Subblock Segmentation Scheme in Partial Transmit Sequence for Reducing PAPR Value in OFDM Systems

Jawhar

Ramli

Taher

et al. 2018

IJIE

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Partial transmit sequence (PTS) is considered an efficient algorithm to alleviate the high peak-toaverage power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. The PTS technique is depended on the partitioning the input data sequence into the several subblocks, and then weighting these subblocks with a group of the phase factors. There are three common types of partitioning schemes: interleaving scheme (IL-PTS), adjacent scheme (Ad-PTS), and pseudo-random scheme (PR-PTS). The three conventional partitioning schemes have various performances of the PAPR value and the computational complexity pattern which are considered the main problems of the OFDM system. In this paper, the three ordinary partition schemes are analyzed and discussed depending on the capability of reducing the PAPR value and the computational complexity. Furthermore, new partitioning scheme is introduced in order to improve the PAPR reduction performance. The simulation results indicated that the PR-PTS scheme could achieve the superiority in PAPR mitigation compared with the rest of the schemes at the expense of increasing the computational complexity. Furthermore, the new segmentation scheme improved the PAPR reduction performance better than that the Ad-PTS and IL-PTS schemes.

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New low-complexity segmentation scheme for the partial transmit sequence technique for reducing the high PAPR value in OFDM systems

Cited by 19 publications

References 31 publications

Improving PAPR performance of filtered OFDM for 5G communications using PTS

Improving PAPR performance of filtered OFDM for 5G communications using PTS

Low-Complexity Partial Transmit Sequence Methods Using Dominant Time-Domain Samples for Multicarrier Faster-Than-Nyquist Signaling

A New Subblock Segmentation Scheme in Partial Transmit Sequence for Reducing PAPR Value in OFDM Systems

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