A Modified SLM Scheme with Low Complexity for PAPR Reduction of OFDM Systems

Heo, Seok-Joong; Noh, Hyung-Suk; No, Jong-Seon; Shin, Dong-Joon

doi:10.1109/pimrc.2007.4394422

Cited by 36 publications

(45 citation statements)

References 7 publications

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“…As reported by Heo et al [8], the PAPR reduction increased when U was increased. Meanwhile, the number of IFFT blocks will be increased for the large U and the computational complexity becomes too high [8] [14]. …”

Section: Conventional Selective Mapping Techniquesupporting

confidence: 69%

“…3. The new alternatives OFDM symbol for modified SLM is given by (7) Therefore, the alternative OFDM signals in the time domain is represented as (8) Finally, the minimum PAPR alternative OFDM signals are obtained by max…”

Section: -2mentioning

confidence: 99%

“…In order to achieve a good result, they have to deal with high computational complexity which requires many Inverse Fast Fourier Transform (IFFT) [6] [7]. As reported by Heo et al [8], the SLM computational complexity increases linearly as the number of phase sequences increases which corresponds to the number of IFFT block. Consequently, recent research has modified the conventional SLM to deal with computational complexity while maintaining PAPR and BER performance [9][10] [11].…”

Section: Introductionmentioning

confidence: 99%

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Modified selective mapping scheme with low complexity for minimizing high peak-average power ratio in orthogonal frequency division multiplexing system

Abdullah

Idris

Saparon

2016

AIP Conference Proceedings

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Abstract. High Peak-to-Average Power Ratio (PAPR) is known to be an unavoidable problem in Orthogonal Frequency Division Multiplexing (OFDM). In this paper, a modified Selective Mapping (SLM) to minimize the high PAPR in OFDM system with low computational complexity is proposed. This technique utilizes the Circulant Shift Codeword technique to the conventional SLM. This technique is utilizing the circulant shift that needs two or more bits in a codeword for shifting. The simulation results show a 27.6% improvement in minimizing high PAPR with minimum Inverse Fast Fourier Transform (IFFT) blocks used. Modified SLM technique minimizes more than 70% of the IFFT blocks compare to conventional SLM. Thus, the computational complexity which is based on the number of IFFT block can be reduced.

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Section: Conventional Selective Mapping Techniquesupporting

confidence: 69%

Section: -2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modified selective mapping scheme with low complexity for minimizing high peak-average power ratio in orthogonal frequency division multiplexing system

Abdullah

Idris

Saparon

2016

AIP Conference Proceedings

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“…Various PAPR reduction techniques are Clipping & filtering [4][5][6][7][8], , selective mapping [8][9][10][11][12][13],Partial transmit sequence [12][13][14][15] , nonlinear companding,Tone Injection, Tone Reservation [16], Active Constellation [17] and coding techniques [25][26]. Although many techniques found in the literature to reduce PAPR ratio in OFDM systems .…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction in OFDM Systems using RCF and SLM Techniques

Manjula¹,

Muralidhara²

2017

IJCA

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Orthogonal Frequency Division Multiplexing is considered as one of the prominent technology for 4G communication to achieve high data rate, spectral efficiency over multipath fading channel. However one of the major drawbacks of OFDM system is high PAPR. Repetitive clipping and filtering(RCF) and selective mapping (SLM) techniques being considered as simple and less complex compare to other techniques, both techniques are analysed and simulated result will give significant reduction in PAP ratio.

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“…In this scheme, low complexity is achieved at the expense of degradation in PAPR reduction. Modified SLM schemes with low computational complexity have been proposed by Zhou and Peng [20] and Seok-Joong, et al [21]. In these schemes, better reduction of peak power is achieved but side information is still required for data recovery.…”

mentioning

confidence: 99%

NORM Technique based PAPR Reduction in MC-CDMA Systems

et al. 2015

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Multicarrier code division multiple access (MC-CDMA) is one of the promising technologies for future-generation wireless networks. It offers high data rates, protection against frequency-selective fading and efficient utilization of the spectrum. The peak to average power ratio (PAPR) is very high in MC-CDMA systems. The partial transmit sequence technique (PTS) and the selective mapping technique (SLM) reduce the PAPR with more computational complexity. In this study, the NORM technique was used for PAPR reduction in MC-CDMA systems. The performance of NORM was analyzed with PTS and SLM in terms of cumulative complementary distribution, power saving gain, amplifier efficiency, computational complexity and bit error rate. Simulation results showed that NORM has better PAPR reduction with less computational complexity.

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A Modified SLM Scheme with Low Complexity for PAPR Reduction of OFDM Systems

Cited by 36 publications

References 7 publications

Modified selective mapping scheme with low complexity for minimizing high peak-average power ratio in orthogonal frequency division multiplexing system

Modified selective mapping scheme with low complexity for minimizing high peak-average power ratio in orthogonal frequency division multiplexing system

PAPR Reduction in OFDM Systems using RCF and SLM Techniques

NORM Technique based PAPR Reduction in MC-CDMA Systems

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