Low-complexity PTS PAPR reduction scheme for UFMC systems

Wang, Rong; Cai, Jingye; Xiang, Yu

doi:10.1007/s10586-017-1124-9

Cited by 29 publications

(21 citation statements)

References 26 publications

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“…Therefore, the UFMC signal can have high peak values, which results high PAPR in UFMC system. The PAPR can be defined as 7

P A P R = \frac{\max_{n ɛ ([], 0, 1, 2 …… . N + L - 1)} ({}, {(||, s_{n})}^{2})}{E ([], {(||, s_{n})}^{2})},

where

E ([], {(||, s_{n})}^{2})

is the average power of s n .…”

Section: Ufmc System Modelmentioning

confidence: 99%

“…PAPR, which severely affects the performance of power amplifier, 7 is one of the serious drawbacks of multicarrier systems. Also, as high PAPR demands the large input backoff (IBO) and decreases the efficiency of the transmit power amplifier considerably, linear amplification of the input signal must be ensured.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are very few studies on the reduction of PAPR in UFMC systems. For example, a partial transmit sequence (PTS) scheme, 7 hybrid advanced rooting companding technique (ARCT) 19 were proposed for UFMC systems.…”

Section: Introductionmentioning

confidence: 99%

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An optimal nonlinear companding transform with clipping scheme for universal filtered multicarrier systems

Chintala

Anuradha

2020

Int J Communication

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SummaryIn this article, an exponential companding (EC) scheme, which can reduce PAPR without raising the average output power level, is proposed for universal filtered multi carrier (UFMC) signals. However, EC scheme degrades the BER performance. Therefore, an optimal nonlinear companding transform named as “modified exponential companding” (MEC), which can use two companding levels based on a threshold value, is proposed. The proposed MEC scheme shows enhanced PAPR and BER performances than EC scheme. Moreover, the MEC provides more design flexibility and freedom with an unchanged average output power level. Furthermore, a hybrid scheme is also proposed to improve PAPR performance, where clipping operation is employed on MEC signal based on an appropriate clipping threshold. Simulation results illustrate that proposed MEC scheme offers improved system performance with a net gain of 7.22 dB than conventional EC and μ‐law techniques. Besides, the proposed hybrid scheme with clipping ratio 1.3 proffers enhanced PAPR reduction of 8.85 dB and improved net gain of 7.95 dB. Also, the proposed EC, MEC, and hybrid schemes can provide lesser spectrum side‐lobe levels than μ‐law. Finally, the UFMC system with the proposed hybrid scheme is verified by employing wireless open‐access research platform (WARP) as hardware over real‐time channel.

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“…Therefore, the UFMC signal can have high peak values, which results high PAPR in UFMC system. The PAPR can be defined as 7

P A P R = \frac{\max_{n ɛ ([], 0, 1, 2 …… . N + L - 1)} ({}, {(||, s_{n})}^{2})}{E ([], {(||, s_{n})}^{2})},

where

E ([], {(||, s_{n})}^{2})

is the average power of s n .…”

Section: Ufmc System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An optimal nonlinear companding transform with clipping scheme for universal filtered multicarrier systems

Chintala

Anuradha

2020

Int J Communication

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“…Due to the fact that a little time has passed since the UFMC was introduced to the science community, a quite limited number of PAPR reduction studies were carried out for the UFMC waveform in the literature. Some of the related studies are as follows 23–29 : Tipan et al 23 compared the performances of three different kinds of clipping schemes on reducing the PAPR of UFMC signal and evaluated their effects on the BER performance of the UFMC waveform in the additive white Gaussian noise (AWGN) channel. In Baig et al, 24 a precoding scheme based on discrete Hartley transform was suggested for the UFMC and the performance of the related scheme was investigated by exerting Monte Carlo simulations.…”

Section: Introductionmentioning

confidence: 99%

“…In Fathy et al, 28 a kind of modified SLM scheme in which U 2 /4 candidate signals are generated from the U different phase sequences was developed. Finally, in Rong et al, 29 a low‐complexity PTS technique possessing almost the same PAPR reduction capability with the conventional PTS was suggested for the UFMC waveform.…”

Section: Introductionmentioning

confidence: 99%

A novel discrete cuckoo search algorithm‐based selective mapping technique to minimize the peak‐to‐average power ratio of universal filtered multicarrier signal

Şimşir

Taşpınar

2020

Int J Communication

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SummaryThe universal filtered multicarrier (UFMC), which has emerged as a product of the intensive studies carried out for developing alternative waveforms compatible with the oncoming fifth generation (5G) technology, has rapidly become one of the few waveforms considered seriously to be utilized in the next generation telecommunication systems due to its exclusive features. However, high peak‐to‐average power ratio (PAPR) problem specific to the multicarrier waveforms is waiting for researchers as the primary issue to be tackled in the UFMC waveform. To address this issue, an efficient PAPR reduction scheme called discrete cuckoo search algorithm‐based selective mapping (DCS‐SLM) is suggested in this paper. While creating the proposed DCS‐SLM scheme, in order to make the original CS algorithm suitable to be integrated into the conventional SLM method, a novel DCS algorithm was developed. Thanks to the related DCS algorithm, it becomes possible in the SLM technique to perform phase sequence optimization, which is a combinatorial optimization process that can be carried out in discrete space. It is clearly observed from the simulation results that the integration of our novel DCS algorithm to create a new PAPR reduction technique called DCS‐SLM leads to a remarkable performance improvement in the conventional SLM method due to the DCS‐based phase optimization through which the PAPR of UFMC signals are reduced to minimum levels.

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Regressive group phase weighting in PTS combined with SLM approach for PAPR reduction in OFDM systems

Kumar

Babu²,

Krishna

2017

Cluster Comput

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Low-complexity PTS PAPR reduction scheme for UFMC systems

Cited by 29 publications

References 26 publications

An optimal nonlinear companding transform with clipping scheme for universal filtered multicarrier systems

An optimal nonlinear companding transform with clipping scheme for universal filtered multicarrier systems

A novel discrete cuckoo search algorithm‐based selective mapping technique to minimize the peak‐to‐average power ratio of universal filtered multicarrier signal

Regressive group phase weighting in PTS combined with SLM approach for PAPR reduction in OFDM systems

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