Peak-to-average power ratio reduction in orthogonal frequency division multiplexing system using differential evolution-based partial transmit sequences scheme

Hung, Ho-Lung; Huang, Yung-Fa

doi:10.1049/iet-com.2010.0997

Cited by 39 publications

(36 citation statements)

References 18 publications

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“…The main principle consists on mapping the data symbols to a new domain, where the probability of the constructive sum of the subcarriers is reduced. Selective Mapping (SLM) [25]- [28], Partial Transmit Sequence (PTS) [29]- [33] and WalshHadamard Transform (WHT) [11], [34]- [39] are the most well-known algorithms in this category.…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

Aquino¹,

Mendes²

2017

JCIS

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Abstract-Orthogonal frequency division multiplexing (OFDM) is a robust and reliable multicarrier modulation scheme that has proven to be adequate for broadband communications. It is widely used in broadcasting and broadband wireless and wireline systems. However, in scenarios where the communication devices are power-limited, such as mobile and satellite communications, OFDM has not been massively used or even not used at all. For instance, OFDM is used only in downlink of 4G networks, while the uplink uses single carrier frequency division multiplexing. One of the main culprits of this is the high peak to average power ratio (PAPR) of the OFDM signal. Reducing the PAPR of the OFDM signals is important for a large variety of application. Several PAPR reduction techniques for OFDM have been proposed recently. The aim of this paper is to present a tutorial about a set of algorithms based on Walsh-Hadamard transform (WHT) for reducing the PAPR of the OFDM symbols. We also propose a new technique, named selective mapping based on WHT without extended information (SLM-WHT-WEI), which does not convey the explicit information to the receiver. We will show that the approaches based on WHT can also improve the OFDM symbol error rate performance over frequency-selective channels. Different schemes based on the properties of the WHT are presented and compared, assuming linear and non-linear channels. The PAPR reduction performance analysis shows that the PAPR can be effectively reduced while good performance in terms of symbol error rate can be achieved even in severely constrained channel conditions.

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Section: Introductionmentioning

confidence: 99%

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

Aquino¹,

Mendes²

2017

JCIS

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“…The computational complexity of the optimal phase search is the major drawback of the conventional PTS scheme. To reduce the complexity of the phase search, the PTS scheme has been combined with certain optimization algorithms such as random search [19], particle swarm optimization (PSO) [20], differential evolution (DE) [21], artificial bee colony (ABC) [22], parallel tabu search (parallel-TS) [23], and harmony search (HS) [24]. By the application of these algorithms, PAPR reductions with low computational complexities are successfully obtained.…”

Section: Introductionmentioning

confidence: 99%

Peak-to-average power ratio reduction using backtracking search optimization algorithm in OFDM systems

Taşpınar¹,

Bozkurt

2016

Turk J Elec Eng & Comp Sci

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Abstract:A peak-to-average power ratio (PAPR) reduction method for an orthogonal frequency division multiplexing (OFDM) system based on a combination of a partial transmit sequence (PTS) scheme with the backtracking search optimization algorithm (BSA) is proposed. The PTS scheme shows good PAPR reduction performance; however, it requires a complex computation to search the set of optimum phase factors, especially for high-speed data transmissions.To minimize the complexity of the search for optimum phase factors, the PTS scheme is combined with the BSA. The BSA is a new and efficient population-based evolutionary search algorithm for real-valued optimization problems. A set of simulations is conducted for the PAPR reduction performance and computational complexity comparisons of the BSA-PTS scheme with different PTS schemes. Simulation results indicate that the BSA-PTS scheme yields an effective PAPR reduction performance with low computational complexity.

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“…To reduce the PAPR of OFDM signals, numerous techniques have been proposed in the literature [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. A comprehensive tutorial review of PAPR reduction techniques in OFDM systems is summarized in [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…It is known that clipping [4] is the simplest method, but it degrades the bit error rate (BER) of the system and results in out-of-band noise and in-band distortion. Among all existing techniques of PAPR reduction, selective mapping (SLM) [7] and partial transmit sequence (PTS) [8][9][10] are very attractive due to their good PAPR reduction without the restriction on the number of subcarriers. However, in SLM technique, the requirement of multiple IFFT operations increases the implementation complexity.…”

Section: Introductionmentioning

confidence: 99%

“…However, the PTS technique requires an exhaustive search over all combinations of allowed phase factors, whose complexity increases exponentially with the number of subblocks. Hence, it achieves considerable PAPR reduction without distortion, but the high computational complexity of multiple Fourier transforms is a problem in practical systems [3,4,[8][9][10]. As a result, for all these search methods, either computational complexity is still high or PAPR reduction performance is not good enough.…”

Section: Introductionmentioning

confidence: 99%

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PAPR reduction of OFDM using invasive weed optimization-based optimal peak reduction tone set selection

Hung

Cheng

Huang

2013

J Wireless Com Network

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Tone reservation (TR) is one of the attractive techniques to reduce peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing system. As conventional TR technique requires exhaustive searching over all the combinations of the given peak reduction tone (PRT) sets, it results in computational complexity that increases exponentially with the number of the subcarriers. In this paper, we aim to obtain a desirable PAPR reduction with low computational complexity. Since the process of searching the optimal PRT set can be categorized as combinatorial optimization with some variables and constraints, we propose a novel scheme, which is based on a nonlinear optimization approach named as invasive weed optimization method, to search the optimal combination of PRT set with low complexity. To validate the analytical results, extensive simulations have been conducted, showing that the proposed schemes can achieve significant reduction in computational complexity while keeping good PAPR reduction. As results of simulations, the proposed scheme shows almost the same PAPR reduction performance as compared with the genetic algorithm-based TR method which has been known to have the best performance and obtains near-optimal PRT sets.

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Peak-to-average power ratio reduction in orthogonal frequency division multiplexing system using differential evolution-based partial transmit sequences scheme

Cited by 39 publications

References 18 publications

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

Peak-to-average power ratio reduction using backtracking search optimization algorithm in OFDM systems

PAPR reduction of OFDM using invasive weed optimization-based optimal peak reduction tone set selection

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