Low-complexity modified SLM method for PAPR reduction in OFDM systems

Sudha, V.; Anilkumar, Bhukya; Sriramkumar, D.

doi:10.1109/ecs.2015.7124799

Cited by 5 publications

(2 citation statements)

References 12 publications

(11 reference statements)

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“…Also, the phase factor assignment must be such that the PAPR signal has the lowest possible value 8,31 . In SLM, data samples are multiplied with random phase vectors; each candidate signal has the different PAPR values which are generated from the same OFDM signal and the signal which has the lowest PAPR is selected as for transmitting through channel 32 . The key difference between the PTS and SLM methods is that all subcarriers containing in each subblock are weighed by the same phase factor component in the PTS method.…”

Section: Papr In Ofdmmentioning

confidence: 99%

A low complex peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems using a two‐dimensional interleaving strategy

Aghdam

Deiri

Tazehkand

et al. 2020

Int J Communication

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Summary One of the effective peak‐to‐average power ratio (PAPR) reduction methods in orthogonal frequency division multiplexing (OFDM) systems is the partial transmit sequence (PTS) method in which the input data stream is divided into disjoint subblocks and the subcarriers in each subblock multiplied by predefined phase factors. Consecutive data symbols corresponding to a source/user are often more correlated, so when the corresponding subcarriers are weighted by the same phase factor, a sufficient reduction in PAPR cannot be attained by the PTS algorithm in common subblocks. To solve this problem, in this paper, we propose a new systematic PAPR reduction method based on a two‐dimensional subcarrier mapping. Specifically, we scramble/interleave each OFDM symbol based on T‐transform to obtain a new set of subblocks which will be multiplied by predefined phase factors. In the proposed method, each one‐dimensional symbol sequence is converted to a two‐dimensional matrix, and the partitions are formed starting from the main diagonal diameters in the matrix. We present the permutation matrix and reformulate the T‐transform technique based on the permutation matrix. Through numerical experimentations, it is shown that the proposed PAPR reduction technique outperforms the previous counterparts. Also, we analyzed our proposed results by aperiodic autocorrelation function (ACF); reducing of ACF side lobes shows that our proposed method cause considerable PAPR parameter reduction respected to other methods.

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Section: Papr In Ofdmmentioning

confidence: 99%

A low complex peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems using a two‐dimensional interleaving strategy

Aghdam

Deiri

Tazehkand

et al. 2020

Int J Communication

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show abstract

“…The basic idea of PTS is to divide the original OFDM signal into some sub-blocks. Each sub-block is weighted by a given value to obtain many candidate signals with a lower PAPR value [12][13][14]. It is known that PTS is a popular method used to reduce PAPR in OFDM systems.…”

Section: Introductionmentioning

confidence: 99%

Palm Date Leaf Clipping: A New Method to Reduce PAPR in OFDM Systems

et al. 2020

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Orthogonal frequency division multiplexing (OFDM) is the key technology used in high-speed communication systems. One of the major drawbacks of OFDM systems is the high peak-to-average power ratio (PAPR) of the transmitted signal. The transmitted signal with a high PAPR requires a very large linear range of the Power Amplifier (PA) on the transmitter side. In this paper, we propose and study a new clipping method named Palm Clipping (Palm date leaf) based on hyperbolic cosine. To evaluate and analyze its performance in terms of the PAPR and Bit Error Rate (BER), we performed some computer simulations by varying the Clipping Ratio (CR) and modulation schemes. The obtained results show that it is possible to achieve a gain of between 7 and 9 dB in terms of PAPR reduction depending on the type of modulation. In addition, comparison with several techniques in terms of PAPR and BER shows that our method is a strong alternative that can be adopted as a PAPR reduction technique for OFDM-based communication systems.

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A Novel Detected Peak Samples Combining Technique for PAPR Minimization of MC-CDMA Signal

Khatri

Tharani

2019

Wireless Pers Commun

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Low-complexity modified SLM method for PAPR reduction in OFDM systems

Cited by 5 publications

References 12 publications

A low complex peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems using a two‐dimensional interleaving strategy

A low complex peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems using a two‐dimensional interleaving strategy

Palm Date Leaf Clipping: A New Method to Reduce PAPR in OFDM Systems

A Novel Detected Peak Samples Combining Technique for PAPR Minimization of MC-CDMA Signal

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