Comparison of PAPR reduction techniques in OFDM systems

Ann, P. Preenu; Jose, Renu

doi:10.1109/cesys.2016.7889995

Cited by 30 publications

(17 citation statements)

References 10 publications

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“…Now, the question is "how to reduce PAPR without affecting the PSD and ACF envelope of the signal?" Many PAPR reduction algorithms exist in the literature for wireless communication, especially for OFDM signals [20,21]. However, these algorithms are not directly applicable to radar signals as they are developed to maintain the information content (i.e., symbols) of the communication signal while optimizing the code.…”

Section: Step Iii: Papr Reduction Proceduresmentioning

confidence: 99%

Low-PAPR Waveforms with Shaped Spectrum for Enhanced Low Probability of Intercept Noise Radars

Savci

Galati²,

Pavan³

2021

Remote Sensing

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Noise radars employ random waveforms in their transmission as compared to traditional radars. Considered as enhanced Low Probability of Intercept (LPI) radars, they are resilient to interference and jamming and less vulnerable to adversarial exploitation than conventional radars. At its simplest, using a random waveform such as bandpass Gaussian noise as a probing signal provides limited radar performance. After a concise review of a particular noise radar architecture and related correlation processing, this paper justifies the rationale for having synthetic (tailored) noise waveforms and proposes the Combined Spectral Shaping and Peak-to-Average Power Reduction (COSPAR) algorithm, which can be utilized for synthesizing noise-like sequences with a Taylor-shaped spectrum under correlation sidelobe level constraints and assigned Peak-to-Average-Power-Ratio (PAPR). Additionally, the Spectral Kurtosis measure is proposed to evaluate the LPI property of waveforms, and experimental results from field trials are reported.

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Section: Step Iii: Papr Reduction Proceduresmentioning

confidence: 99%

Low-PAPR Waveforms with Shaped Spectrum for Enhanced Low Probability of Intercept Noise Radars

Savci

Galati²,

Pavan³

2021

Remote Sensing

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“…where is the data symbol transmitted on the ℎ sub carrier , the subcarrier index is denoted by k and is the symbol duration. OFDM systems introduce high PAPR due to the use of a large number of subcarriers [19], for a continuous time baseband OFDM signal, the definition of PAPR of any signal is the proportion of the maximum instantaneous power of the signal to its mean power. If ( ) represents a baseband transmitted OFDM signal, then…”

Section: Ofdm Signal Model and Peak To Average Power Ratio (Papr)mentioning

confidence: 99%

OFDM PAPR reduction for image transmission using improved tone reservation

Ghanim

Omran

2021

IJECE

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High peak to average power ration (PAPR) in orthogonal frequency division multiplexing (OFDM) is an important problem, which increase the cost and complexity of high power amplifiers. One of the techniques used to reduce the PAPR in OFDM system is the tone reservation method (TR). In our work we propose a modified tone reservation method to decrease the PAPR with low complexity compared with the conventional TR method by process the high and low amplitudes at the same time. An image of size 128×128 is used as a source of data that transmitted using OFDM system. The proposed method decrease the PAPR by 2dB compared with conventional method with keeping the performance unchanged. The performance of the proposed method is tested with several numbers of subcarriers; we found that the PAPR is reduced as the number of subcarriers decreased.

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“…In addition, for the same column or row indexes all of the components in F' are in a geometric system using the similar mutual ratio of The chaotic sequence is used to produce the phase weighting factors {R l } in PTS and it will be optimized by optimization techniques. (11) where the IFFT (inverse fast fourier transformation) of X (l) is denoted by x (l) , the indices of OFDM symbol and subcarrier is expressed by s and n respectively.…”

Section: Fig 2: Diagram Of Chaotic-dft Sequencementioning

confidence: 99%

“…In order to obtain reduced PAPR value, each sub-blocks are changed by traditional rotation factors. A few bits of the code word is used to decrease PAPR and increase the BER in coding technique [11][12]. The Inverse Fast Fourier Transforms (IFFT) of all these sub-blocks are then obtained and multiplied by various combinations from a set of phase rotation vectors [13].…”

Section: Introductionmentioning

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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Comparison of PAPR reduction techniques in OFDM systems

Cited by 30 publications

References 10 publications

Low-PAPR Waveforms with Shaped Spectrum for Enhanced Low Probability of Intercept Noise Radars

Low-PAPR Waveforms with Shaped Spectrum for Enhanced Low Probability of Intercept Noise Radars

OFDM PAPR reduction for image transmission using improved tone reservation

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

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