Polynomial-based compressing and iterative expanding for PAPR reduction in GFDM

Sharifian, Zahra; Omidi, Mohammad Javad; Farhang, Arman; Saeedi-Sourck, Hamid

doi:10.1109/iraniancee.2015.7146271

Cited by 31 publications

(22 citation statements)

References 17 publications

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“…Second, the PSD of transmitted signal (37) is verified with simulation results and adjacent channel power ratio (ACPR). Third, the sum rate maximization of the full-duplex link (48) given PU interference constraints (45) is solved for several different scenarios.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Cognitive GFDM Full-Duplex Radios With RF Impairments and ACI Constraints

Mohammadian

Tellambura

2020

IEEE Open J. Commun. Soc.

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We investigate the problem of sum-rate maximization of a secondary link of full-duplex generalized frequency division multiplexing (GFDM) radios operating over a spectrum hole, which is surrounded by two active primary adjacent channels. Thus, the secondary transmissions must be below an adjacent channel interference (ACI) threshold. In-band distortions and several interference terms are also caused by phase noise, in-phase (I) and quadrature (Q) imbalance, carrier frequency offset (CFO) and the nonlinear power amplifier (PA). Analog domain and digital domain self-interference (SI) cancellation is also considered. We study the two cases of two independent oscillators for local transmitter and receiver and one common shared oscillator. We derive the powers of residual SI, desired signal, interference signal and noise, signal-to-interference-plus noise ratio (SINR) and the power spectral density (PSD) of the transmit signal. By using successive convex approximations, we solve the sum-rate maximization problem. Finally, we show that in full-duplex radios under certain RF impairments, GFDM may double the sum rate compared to that of orthogonal frequency division multiplexing (OFDM). INDEX TERMS Full-duplex radios, generalized frequency division multiplexing (GFDM), cognitive radio, spectrum hole, radio frequency (RF) impairments, rate optimization.

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Section: Simulation Resultsmentioning

confidence: 99%

“…. Therefore, by using the AGMA, two sum rate components in (46) are converted to (48). This equation is given in the bottom of the next page.…”

Section: Sum Rate Maximizationmentioning

confidence: 99%

Cognitive GFDM Full-Duplex Radios With RF Impairments and ACI Constraints

Mohammadian

Tellambura

2020

IEEE Open J. Commun. Soc.

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“…Sharifian et al [26] proposed a polynomial based companding method with iterative expansion that is called Polynomial-based Companding Technique (PCT). The proposed technique is based on application of a polynomial compressor at the transmitter and an iterative expander at the receiver side.…”

Section: Evolution Of Ofdm and Gfdm Techniquesmentioning

confidence: 99%

On Various Techniques in Ofdm and Gfdm: A Survey

Kumar

2017

ijsrtm

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Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation that divides the available spectrum into a finite number of carriers and applied into a digital transmission system. But it has some drawbacks such as sensitivity in inter-carrier interference, high peak to average power ratio and insufficient cyclic prefix in spectrum. These drawbacks may be reduced by a technique known as Generalized Frequency Division Multiplexing (GFDM). In the present scenario, it is a high speed multi-carrier multiplexing data transfer scheme for the cellular network. This paper deals with a comparison between OFDM and GFDM and focuses on various techniques in OFDM and GFDM.

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“…There is a very deep gap in the literature with regard to studies carried out for PAPR reduction in the GFDM waveform. Although no study has been performed so far regarding the PAPR reduction in the LC‐GFDM system, there are quite limited number of PAPR reduction studies related to the GFDM waveform in the literature . In the work of Sendrei et al, an iterative receiver is proposed for clipping‐based nonlinear distortions in the PAPR‐reduced GFDM transmission signal.…”

Section: Introductionmentioning

confidence: 99%

Cumulative symbol optimization–based partial transmit sequence technique for PAPR reduction in low complexity GFDM system

Şimşir

Taşpınar

2019

Trans Emerging Tel Tech

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The new waveform called generalized frequency division multiplexing (GFDM), which has been increasing its popularity among the fifth generation (5G) waveform candidates day by day, is suggested very recently to meet the requirements of the next-generation cellular systems. On the other hand, it is possible to generate and demodulate the GFDM signal with a less processing load by using low-complexity GFDM (LC-GFDM) system proposed shortly after the GFDM scheme. However, similar to the GFDM and the other multicarrier systems, high peak-to-average power ratio (PAPR) problem stands as one of the biggest obstacles, making difficulties for smooth communication in the LC-GFDM system. In this system, the GFDM symbols obtained by the multiplication of time domain GFDM data sequences with circularly shifted prototype filter impulse responses are added together to achieve the transmission signal. Due to the related symbol addition process, direct application of the conventional partial transmit sequence (C-PTS) technique, which was actually first developed for orthogonal frequency division multiplexing (OFDM), to the LC-GFDM system without any modification will be useless. For this reason, we developed a new technique called cumulative symbol optimization-based partial transmit sequence (CSO-PTS) for PAPR reduction in the LC-GFDM system. In the simulations, the CSO-PTS technique is compared to two different PAPR reduction methods called selective mapping and GreenOFDM. Simulation results evidently demonstrates that our novel proposal outperforms the other considered methods by ensuring quite efficient PAPR reduction, side lobe suppression, and bit error rate improvement in the LC-GFDM system.Trans Emerging Tel Tech. 2020;31:e3801.wileyonlinelibrary.com/journal/ett

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Polynomial-based compressing and iterative expanding for PAPR reduction in GFDM

Cited by 31 publications

References 17 publications

Cognitive GFDM Full-Duplex Radios With RF Impairments and ACI Constraints

Cognitive GFDM Full-Duplex Radios With RF Impairments and ACI Constraints

On Various Techniques in Ofdm and Gfdm: A Survey

Cumulative symbol optimization–based partial transmit sequence technique for PAPR reduction in low complexity GFDM system

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