On the Selection of the Best MSR PAPR Reduction Technique for OFDM Based Systems

Mounir, Mohamed; Mashade, Mohamed B. El; Gaba, Gurjot Singh

doi:10.1007/978-981-15-3075-3_11

Cited by 3 publications

(5 citation statements)

References 10 publications

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“…As a result, the computational effort of the PAPR calculation process consists of (2N ) real multiplications and (N ) real additions. As a result, the computational complexity of SLM is given by [46]:…”

Section: Conventional Slm Techniquementioning

confidence: 99%

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Low-complexity selective mapping technique for PAPR reduction in downlink power domain OFDM-NOMA

Mounir

Youssef

Aboshosha

2023

EURASIP J. Adv. Signal Process.

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To support ultra-massive connectivity, non-orthogonal multiple access (NOMA) techniques are expected to be used in 6G instead of conventional orthogonal multiple access (OMA) techniques. Furthermore, given that orthogonal frequency division multiplexing (OFDM) was used by 4G and 5G, NOMA is expected to be combined with OFDM to mitigate frequency selectivity in multipath channels. However, after passing through nonlinear high power amplifiers (HPAs), OFDM-NOMA has reportedly suffered from nonlinear distortion due to the high peak-to-average power ratio (PAPR) problem, thus reducing users’ achievable data rates, sum rate capacity, and users’ bit error rate after going through nonlinear HPAs. Many PAPR reduction techniques have been introduced in the literature; however, high PAPR reduction gain comes at the expense of computational complexity. In this paper, a novel selective mapping (SLM) scheme for PAPR reduction in OFDM-NOMA systems is proposed. By utilizing the structure of the OFDM-NOMA transmitter, the proposed SLM scheme achieves the same performance as that of the conventional SLM scheme while requiring less computational complexity.

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Section: Conventional Slm Techniquementioning

confidence: 99%

“…Similarly, increasing the number of alternatives will increase the required number of side information (SI) bits ⌈log 2 U ⌉ [46]. Assume a channel coding technique with code rate R c is used to protect the SI bits and binary phase shift keying (BPSK) is used to modulate the SI bits.…”

Section: Conventional Slm Techniquementioning

confidence: 99%

Low-complexity selective mapping technique for PAPR reduction in downlink power domain OFDM-NOMA

Mounir

Youssef

Aboshosha

2023

EURASIP J. Adv. Signal Process.

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“…Finally, the FBMC-OQAM signal is converted into an analog signal that is to be transmitted through the AWGN channel, but before that it will be compressed by using nonlinear mu-law companding block to improve spectral efficiency and it is expressed [23], [24] as, (14) at receiver, compressed FBMC/OQAM signal is expanded by using function of inverse companding [25] that is, an opposite operation of the transmitter and it is as (15).…”

Section: Non-linear Mu-law Compandingmentioning

confidence: 99%

Performance improvement on spectral efficiency and peak to avearge power reduction for 5G system

Kavitha

Raju²,

Pujali

2022

IJEECS

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<span>Filter bank multicarrier with offset quadrature amplitude modulation (FMBC/OQAM) system which can offer higher data rate 1 Gbps and improved bandwidth efficiency because of not require of cyclic prefix (CP) to avoid interference from the adjacent channels compared to fourth generation (4G) orthogonal frequency division multiplexing (OFDM) and other wireless systems. Because of these advantages FBMC/OQAM are used in fifth generation (5G) technology. In this FBMC/OQAM system, bandwidth capacity will be further increased by using multiple input multiple output (MIMO) channel. But in our proposed scheme we can use hyper–MIMO channel, in which at base station (BS) more number of transmitting antennas are used that for the improve the spectral efficiency performance better than traditional MIMO channel. But the most important drawback of hyper MIMO FBMC/OQAM is the higher peak to average-power ratio (PAPR) that degrade overall system performance in 5G. In 4G technology, to reduce PAPR a number of techniques are used. In our proposed system we can use mu-law non-linear companding technique and precoding discrete cosine transform (DCT) to reduce PAPR value for multicarrier modulation system compare to other systems.</span>

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“… Comparison of computational complexity of SRC, Log, and Hybrid SRC-Log, based on (17), (19), along with PTS [ 15 ] with V = 16 and W = 2. …”

Section: Figurementioning

confidence: 99%

“…For example, MSR techniques have large PAPR reduction gain and well reduce BER and OOB-radiation. However, they require excessive computational complexity in addition to rate loss [ 15 ]. On the other hand, companding techniques have small PAPR reduction gain with trivial computational complexity [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Precoding-Companding Technique for Peak-to-Average Power Ratio Reduction in 5G and beyond

Mounir

Mashade

Berra

et al. 2021

Sensors

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Several high-speed wireless systems use Orthogonal Frequency Division Multiplexing (OFDM) due to its advantages. 5G has adopted OFDM and is expected to be considered beyond 5G (B5G). Meanwhile, OFDM has a high Peak-to-Average Power Ratio (PAPR) problem. Hybridization between two PAPR reduction techniques gains the two techniques’ advantages. Hybrid precoding-companding techniques are attractive as they require small computational complexity to achieve high PAPR reduction gain. Many precoding-companding techniques were introduced to increasing the PAPR reduction gain. However, reducing Bit Error Rate (BER) and out-of-band (OOB) radiation are more significant than increasing PAPR reduction gain. This paper proposes a new precoding-companding technique to better reduce the BER and OOB radiation than previous precoding-companding techniques. Results showed that the proposed technique outperforms all previous precoding-companding techniques in BER enhancement and OOB radiation reduction. The proposed technique reduces the Error Vector Magnitude (EVM) by 15 dB compared with 10 dB for the best previous technique. Additionally, the proposed technique increases high power amplifier efficiency (HPA) by 11.4%, while the best previous technique increased HPA efficiency by 9.8%. Moreover, our proposal achieves PAPR reduction gain better than the most known powerful PAPR reduction technique with a 99% reduction in required computational complexity.

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On the Selection of the Best MSR PAPR Reduction Technique for OFDM Based Systems

Cited by 3 publications

References 10 publications

Low-complexity selective mapping technique for PAPR reduction in downlink power domain OFDM-NOMA

Low-complexity selective mapping technique for PAPR reduction in downlink power domain OFDM-NOMA

Performance improvement on spectral efficiency and peak to avearge power reduction for 5G system

A Novel Hybrid Precoding-Companding Technique for Peak-to-Average Power Ratio Reduction in 5G and beyond

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