Improved PAPR Reduction Using Gamma Correction in SC-FDMA Systems Under Multipath Fading Channels

Santh, J. Arun Prem; Judson, D.; Selvaraj, K.; Bhaskar, Vidhyacharan

doi:10.1007/s11277-022-09690-2

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…However, OFDM requires perfect carrier synchronization and suffers from high PAPR and less power efficiency. As a result, SC‐FDMA stood as a better choice for uplink transmissions in 4G LTE systems 11–13 …”

Section: Introductionmentioning

confidence: 99%

“…As a result, SC-FDMA stood as a better choice for uplink transmissions in 4G LTE systems. [11][12][13] SC-FDMA is a DFT precoded OFDM system offering low PAPR and is widely used in uplink transmission. The SC-FDMA systems can be extended to use diverse orthogonal trigonometric transforms rather than using inverse fast Fourier transform (IFFT).…”

Section: Introductionmentioning

confidence: 99%

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Low‐complexity joint equalization and CFO compensation in uplink SC‐FDMA NOMA system under different power allocation strategies

Judson

Portia

Livingston

2023

Trans Emerging Tel Tech

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In current wireless systems, the claim for rapid data services has become unavoidable in broadband communication. Single carrier frequency division multiple access (SC‐FDMA) has remained a multiple access (MA) technique with low peak‐to‐average power ratio (PAPR) in 4G systems. Non‐orthogonal multiple access (NOMA) is a complimentary MA technique in the fifth generation (5G) new radio with the capability of using similar frequency elements for multiuser communication within a single cellular system. In SC‐FDMA NOMA systems the carrier frequency offsets (CFO) destroy the orthogonal behavior in multiple carriers during transmission leading to inter‐carrier interference (ICI) and multiple access interference (MAI). Furthermore, the power allocated for each user in the NOMA cluster exhibits a noticeable part in enhancing the performance of the system. In this article, we propose a joint low‐complexity linear regularized zero forcing (JLC‐LRZF) for SC‐FDMA NOMA system and investigate its performance using discrete Fourier transform (DFT) and discrete cosine transform (DCT). The proposed JLC‐LRZF equalization algorithm is capable of performing equalization and CFO compensation with low‐complexity with banded‐matrix approximation (BMA). Additionally, we investigate the effectiveness of SC‐FDMA NOMA system in achieving improved performance with different values of CFO and power allocation policies in uniform random multipath channels.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%