Performance evaluation of MIMO DFT-Spread WR-OFDM system for spectrum efficiency and power efficiency

Hossain, Md. Najmul

doi:10.1080/24751839.2022.2066847

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…In order to increase the effectiveness of uplink transmission, a PAPR reduction technique for OCDM system based on the discrete Fourier transform (DFT) precoding process is presented in this study. To efficiently minimize the PAPR of the system, DFT precoding is performed prior to inverse discrete Fresnel transform (IDFnT) operation at the transmitter side [14].…”

Section: Introductionmentioning

confidence: 99%

DFT-Spread WR-OCDM Communication System for the Reductions of OOB and PAPR

Rahman,

Ryu

2023

Preprint

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Orthogonal chirp division multiplexing (OCDM) system has been considered as one candidate for the nextgeneration 6G cellular system that will support many new services and applications but will suffer from the sub-THz frequency band. It is anticipated that this will significantly harm the waveform orthogonality of conventional systems and lead to obnoxious intercarrier interference (ICI) and a very high propagation loss on information signals by introducing peak-to-average power ratio (PAPR). As a result, PAPR reduction is the most important aspect of 6G wireless communication system than 4G long-term evolution (LTE), 5G new radio (NR) schemes because it will use the Sub-THz frequency band which has a very high tendency toward propagation loss component. Therefore, spread spectrum technology termed as orthogonal chirp division multiplexing (OCDM) takes into account for the orthogonality of cyclically shifted quadratic chirp signals in order to increase spectral efficiency and reducing PAPR. The OCDM system, however, emits considerable out-of-band (OOB) power. To solve this problem, we suggest a new discrete Fourier transform (DFT)Spread Windowing and Restructuring (WR)-OCDM (DFT-Spread WR-OCDM) method for a suitably acceptable PAPR and OOB power emission reduction. In the system, the OOB power emissions are successfully reduced at the transmitter using time-domain windowing, and relatively shorter in window length is sufficient to satisfy the standard spectral mask. Comparing the proposed scheme to previous OFDM and OCDM systems, simulation findings show that this technique greatly reduces PAPR by about 2 dB and OOB power emission approximately by 64 dB and 70 dB. Additionally, we examine the bit error ratio (BER) performance using AWGN channel. This DFT-Spread WROCDM scheme performs almost similar results as compared to the conventional OFDM, OCDM, and WR-OCDM systems.

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Section: Introductionmentioning

confidence: 99%

DFT-Spread WR-OCDM Communication System for the Reductions of OOB and PAPR

Rahman,

Ryu

2023

Preprint

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“…Localized and interleaved subcarrier mapping schemes are used [17] to investigate the PAPR performance of single carrier spread spectrum techniques which shows that a proposed hybrid multiple access scheme performs well than SC-FDMA. To obtain multi-user diversity and lower PAPR, the localized subcarrier mapping is used [18] for MIMO system where improved spectrum efficiency and power efficiency are achieved.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Performances Between Sc-Fdma and Ofdma Systems Under Different Subcarrier Mapping Schemes

Mishra

Roy

2023

AEJ

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To improve the uplink performance of wireless network for long term evolution (LTE) single carrier frequency division multiple access (SC-FDMA) and orthogonal frequency division multiple access (OFDMA) are used. Two major concerns of these SC-FDMA and OFDMA are high peak-to-average power ratio (PAPR) and efficient subcarrier mapping scheme. This paper presents a performance comparison of SC-FDMA and OFDMA under different subcarrier mapping schemes which includes localized FDMA (LFDMA), distributed FDMA (DFDMA) and interleaved FDMA (IFDMA). Quadrature amplitude modulation (QAM) with different constellation sizes is used. The symbol error rate (SER) in SC-FDMA is minimized using appropriate mapping scheme. The PAPR is less in SC-FDMA compared to OFDMA. SC-FDMA with IFDMA shows better performance for the PAPR reduction compared to the OFDMA. Compared to OFDMA, using SC-FDMA with 8-QAM and IFDMA, PAPR is reduced by 78%, using SC-FDMA with 16-QAM and IFDMA, PAPR is reduced by 80%, using SC-FDMA with 64-QAM and IFDMA, PAPR is reduced by 68%.

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Performance statistics of broadcasting networks with receiver diversity and Fountain codes

Nguyen

Tran

et al. 2023

Journal of Information and Telecommunication

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Performance evaluation of MIMO DFT-Spread WR-OFDM system for spectrum efficiency and power efficiency

Cited by 4 publications

References 24 publications

DFT-Spread WR-OCDM Communication System for the Reductions of OOB and PAPR

DFT-Spread WR-OCDM Communication System for the Reductions of OOB and PAPR

Comparison of Performances Between Sc-Fdma and Ofdma Systems Under Different Subcarrier Mapping Schemes

Performance statistics of broadcasting networks with receiver diversity and Fountain codes

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