Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Taşpınar, Necmi; Şimşir, Şakir

doi:10.1002/dac.4081

Cited by 10 publications

(9 citation statements)

References 33 publications

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“…In other words, U different IFFT operations have to be carried out in the SLM scheme to be able to calculate the PAPR of U different candidate signals and then select the optimal one with the lowest PAPR. On the other hand, LN ‐point single IFFT operation needs ( LN /2)log 2 ( LN ) complex multiplications and ( LN )log 2 ( LN ) complex additions 17,33 . Assuming that the computational load of a single complex multiplication is equivalent to that of four complex additions as in Yang et al, 33 the overall complexity expression of one IFFT operation can be written in terms of complex additions by multiplying the number of complex multiplications by 4, then adding it to the number of complex additions in the following manner:

n_{add} = 4 ((), italicLN / 2) \log_{2} ((), LN) + ((), LN) \log_{2} ((), LN) = 3 ((), LN) \log_{2} ((), LN),

where n add indicates the number of complex additions.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Indispensability of employing such amplifiers in practical applications makes the PAPR reduction a compulsory process for the multicarrier signals prior to giving them to the amplifier input. With the intention of avoiding the nonlinear HPA‐based signal distortions, the researchers proposed varied methods for PAPR minimization such as tone injection (TI), 9 active constellation extension (ACE), 10 coding, 11 tone reservation (TR), 12 clipping and filtering, 13 selective mapping (SLM), 14,15 partial transmit sequence (PTS), 16,17 and interleaving 18 …”

Section: Introductionmentioning

confidence: 99%

“…In the aforementioned PAPR reduction procedures, 9–18 the SLM method frequently employed in diversified multicarrier systems in the literature comes into prominence due to its capability of reducing the PAPR of transmission signal in a very effective manner without leading to any degradation. Furthermore, being possessed of a flexible structure suitable for any modification ensures the SLM to be among the most preferred PAPR reduction procedures.…”

Section: Introductionmentioning

confidence: 99%

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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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n_{add} = 4 ((), italicLN / 2) \log_{2} ((), LN) + ((), LN) \log_{2} ((), LN) = 3 ((), LN) \log_{2} ((), LN),

where n add indicates the number of complex additions.…”

Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Necmi Taşpınar and Şakir Şimşir [24] were proposed a dual symbol optimization-PTS (DSO-PTS) method. With lowest PAPR, if searching, our proposed scheme considers both two adjacent symbols for the optimum data block.…”

Section: Some Of the Recent Related Work Related To The Papr Reductimentioning

confidence: 99%

PAPR Reduction and Encryption Based On Hybrid Optimized PTS and Chaotic-DFT Sequences in OFDM System

Sarkar¹,

Kumar²,

Maji³

2019

IJEAT

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In high-speed wireless applications, because of the high-speed compatibility of the OFDM, it is a significant signal processing approach. In general, an efficient spectral multicarrier modulation strategy is named OFDM, which gets impact via the issues of high PAPR. Because of the limited BW availability, the demand for high-speed applications is increasing. Due to the high data requirement, the various subcarriers are increased in OFDM, hence it made the difficult with PAPR (peak-to-average power ratio). To achieve better results by reducing the PAPR is the foremost problem on OFDM. In this paper, a hybrid optimized PTS is used to decrease the PAPR and the data will be encrypted by the DFT based chaotic sequences. A new Hybrid Whale Optimization and Moth Flame Optimization (HWOMFO) is introduced in this paper. It will generate a weighting factor for the PTS. PTS is the foremost strategy in OFDM for reducing the PAPR with low distortion. The minimum performance on computational complexity and PAPR achieved by this paper. The new combination of optimization approaches provides efficient best combination of phase rotational factors. The new hybrid optimization gives fast convergence quality and low complex and also this combination provides better than others. The proposed scheme is executed in MATLAB simulation and performance will be evaluated using parameters such as BER regards to SNR, complementary cumulative distribution function (CCDF) of PAPR and the outputs are associated depends on computation time. However, the experimental results show that compared with existing approaches, our proposed strategy gives better PAPR reduction with respect to SNR.

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“…2 Thus, the PAPR should be reduced to eliminate the nonlinear distortion and improve the performance of bit error rate (BER). 3,4 Many PAPR reduction approaches have been reported in the previous studies, such as clipping and filtering, 5 nonlinear companding, 6 coding, 7 tone reservation (TR), 8 ton injection (TI), 9 precoding-based methods, 10,11 partial transmit sequence (PTS), 12,13 and selective mapping (SLM). 14 The extensive research on PAPR reduction methods is also surveyed.…”

Section: Introductionmentioning

confidence: 99%

A novel ant colony optimization algorithm for PAPR reduction of OFDM signals

Aghdam

Sharifi

2020

Int J Communication

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SummaryThe high peak‐to‐average power ratio (PAPR) is the main challenge of orthogonal frequency division multiplexing (OFDM) systems. Partial transmit sequence (PTS) is a useful approach to diminish the PAPR. Although the PTS approach significantly decreases the PAPR, it requires to explore all possible sequences of phase weighting factors. Hence, the computational cost exponentially increases with the number of divided subblocks. This paper proposes a novel PTS technique based on ant colony optimization (ACO) to diminish the high PAPR and computational cost of OFDM systems. By the new representation of phase factors as a graph, the improved ACO algorithm is combined with the PTS method to explore the optimal compound of the phase rotation factors. Simulation results represent that the proposed ACO‐based PTS approach significantly reduces the PAPR and improves the computational cost at the same time. A comparative analysis of the other meta‐heuristics shows that the ACO‐PTS approach outperforms the genetic algorithm, particle swarm optimization, and gray wolf optimization in terms of reducing PAPR.

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Dual symbol optimization‐based partial transmit sequence technique for PAPR reduction in WOLA‐OFDM waveform

Cited by 10 publications

References 33 publications

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

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

PAPR Reduction and Encryption Based On Hybrid Optimized PTS and Chaotic-DFT Sequences in OFDM System

A novel ant colony optimization algorithm for PAPR reduction of OFDM signals

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