Peak Average Power Reduction in NOMA by using PTSCT Technique

Кумар, Арун; Gupta, Manisha

doi:10.2174/2213275912666190429153436

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…However, the proposed scheme degrades the capacity performance of the frame work. The authors 18 introduced a PTS–CT approach to lower the PAPR of NOMA. The provided simulation outcomes reveal that the PTS–CT achieves a better gain as compared to conventional PTS.…”

Section: Literature Reviewmentioning

confidence: 99%

“… An inverse fast Fourier transform (IFFT) is applied to the modulated symbols (

Z_{j}

), given as

y ((), t) goodbreak= \sum_{j = 0}^{N - 1} Z_{j} \exp ((), i 2 italicπj \frac{t}{T})

Equation () can also be written as

y ((), t) goodbreak= \sum_{m = 0}^{M - 1} S_{m} true(\sum_{j = 0}^{N - 1} R_{j, m} \exp ((), i 2 italicπj \frac{t}{T})

where the time duration of NOMA symbols is estimated as

T = N T_{s} ((), Symbol duration)

. Mathematically, PAPR is defined by Kumar and Gupta 18 :

{PAPR}_{dB} goodbreak= 10 \log_{10} \frac{{({, \max |y (t)|\})}^{2}}{{({, E (}, |y (t)|))}^{2}}

…”

Section: System Modelmentioning

confidence: 99%

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A hybrid technique for the PAPR reduction of NOMA waveform

Кумар¹,

Gour

Sharma

et al. 2022

Int J Communication

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Non-orthogonal multiple access (NOMA) is a great contender for future cellular modulation due to its desirable properties like massive connectivity, high data rate transmission, and high spectral efficiency. However, its peak-to-average power ratio (PAPR) is significant, which becomes a significant disadvantage for the efficient operability of the NOMA waveform compared to current techniques. Several PAPR reduction algorithms like selective mapping (SLM), partial transmission sequence (PTS), and companding techniques have been proposed to lower the PAPR of multicarrier waveforms (MCWs). PTS reduces the PAPR but has high complexity. On the other hand, SLM has a less complex framework, but its PAPR performance is not as efficient as PTS. Companding methods reduce the PAPR by compressing the signals at the transmitter, which unfortunately reduces the dynamic range of the signal. In this work, we propose a hybrid algorithm (SLM + PTS) with a companding method for the first time for the NOMA waveform, which efficiently reduces the PAPR with low computational complexity. Furthermore, we compare the performances of a host of candidate algorithms like SLM, PTS, hybrid (SLM + PTS), hybrid + A law (SLM-PTS-A law), and hybrid + Mu law (SLM-PTS-Mu law). The results of the experiments show that the hybrid + Mu law did a better job than the existing PAPR reduction algorithms.

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Section: Literature Reviewmentioning

confidence: 99%

“… An inverse fast Fourier transform (IFFT) is applied to the modulated symbols (