A novel PAPR reduction method for ADO-OFDM VLC systems

Hameed, Samir M.; Sabri, Atheer A.; Abdulsatar, Sinan M.

doi:10.1007/s11082-021-03251-w

Cited by 8 publications

(11 citation statements)

References 30 publications

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“…Table 3 presents the comparison of different MIMO systems based on different O‐OFDM. As computed in Reference 18, the PAPR and average optical power are other parameters used to evaluate the performance. It can be seen that MIMO‐ACO‐OFDM has a higher PAPR compared to other O‐OFDM while achieving the best average optical power.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…To compare and investigate the ADO-OFDM performance, ACO-OFDM and DCO-OFDM are utilized as processing elements to simulate MIMO technology in VLC. Figure 12 MIMO structures Uncoded Coded PAPR 18 Average optical power (dBm) 18 (19). Table 3 presents the comparison of different MIMO systems based on different O-OFDM.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…So, the DCO-OFDM demodulation can be obtained by subtracting the re-generated ACO-OFDM from the received signal Y ADO-OFDM as follows 17 : (18) where X ∼ ACO−OFDM is the re-generated ACO-OFDM signal. The even symbols are obtained by taking FFT to Equation (18). Then odd and even symbols are collected for the final M-QAM demodulation process to restore the original information.…”

Section: F I G U R E 2 Siso-ado-ofdm Receivermentioning

confidence: 99%

“…On the other hand, DCO-OFDM demodulation is a significant issue due to clipping noise in even components and the interfering ACO-OFDM signal. So, the DCO-OFDM demodulation can be obtained by subtracting the re-generated ACO-OFDM from the received signal Y ADO-OFDM as follows 17 : (18) where X ∼ ACO−OFDM is the re-generated ACO-OFDM signal. The even symbols are obtained by taking FFT to Equation (18).…”

Section: F I G U R E 2 Siso-ado-ofdm Receivermentioning

confidence: 99%

“…9 Asymmetrically biased DC-biased O-OFDM (ADO-OFDM) was proposed to improve the performance of VLC by combing both ACO-OFDM and DCO-OFDM and reaping their benefits. 9,14,16,17 Our previous works 12,17,18 described ADO-OFDM as a possible way to achieve VLC systems. However, various comparisons were carried out with the other O-OFDM technologies to increase spectral efficiency, peak to average power ratio (PAPR) reduction, and performance enhancement.…”

Section: Introductionmentioning

confidence: 99%

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Visible light communication performance using MIMO‐ADO‐OFDM system

Hameed

Abdulsatar

Sabri

2022

Trans Emerging Tel Tech

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Visible light communications (VLC) and optical orthogonal frequency division multiplexing (O-OFDM) have recently been identified as hopeful wireless techniques. Asymmetrically clipped DC-biased O-OFDM (ADO-OFDM)is a modern performance enhancement technology used in VLC. This article proposes a performance improvement model using a novel approach that collaborates with ADO-OFDM and multiple-input multiple-output (MIMO) in different design scenarios. In the first scenario, the bit-error-rate (BER) performance improvement is examined using different setups of MIMO-ADO-OFDM with maximal ratio combining (MRC). 8 × 8 MIMO good performance can be attained with about 15 dB signal-to-noise ratio for BER = 10 −4 . Another scenario is to boost the spectral efficiency of MIMO-ADO-OFDM by employing spatial multiplexing (SMX). However, 8 × 8 MIMO with SMX can improve spectral efficiency eight times that of single-input single-output ADO-OFDM by fragmenting source data into numerous independent data streams. In the last scenario, multi-user MIMO is developed by adopting ADO-OFDM with zero-forcing equalisers, allowing each user to consume all available bandwidth. The proposed technologies are evaluated by comparison with other MIMO systems, different O-OFDM, and under a non-linear LED model.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: F I G U R E 2 Siso-ado-ofdm Receivermentioning

confidence: 99%

Section: F I G U R E 2 Siso-ado-ofdm Receivermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Visible light communication performance using MIMO‐ADO‐OFDM system

Hameed

Abdulsatar

Sabri

2022

Trans Emerging Tel Tech

Self Cite

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Throughput improvement and PAPR reduction for OFDM-based VLC systems using an integrated STC-IMADJS technique

Elbakry¹,

Mohammed

Ismail

2022

Opt Quant Electron

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Visible light communication (VLC) is a technology that is currently being employed to achieve high data rates. Orthogonal frequency division multiplexing (OFDM) is a powerful scheme for intensity modulation and direct detection (IM-DD) that is becoming increasingly important. OFDM systems based on VLC are accomplished through the implementation of IM-DD constraints, including direct current biased optical OFDM (DCO-OFDM), asymmetrically clipped optical OFDM (ACO-OFDM), and asymmetrically clipped DC-biased (ADO-OFDM), among others. The OFDM technique based on VLC is inefficient in terms of spectral efficiency and has a high peak to average power ratio (PAPR). In this article, the symbol time compression-image adjust (STC-IMADJS) technique will be proposed for throughput maximization and PAPR reduction in the DCO-OFDM, ACO-OFDM, and ADO-OFDM systems. Furthermore, the STC technique enables the simultaneous transmission of two sub-carriers through Walsh spreading codes without inference between them. As a result, the OFDM symbol has been reduced by 50%. The IMADJS strategy reduces the high PAPR of transmitted signals by compressing large signals and expanding small signals, as long as the average power level remains constant after compression. Therefore, the proposed STC-IMADJS technique doubles the throughput as well as significantly reduces the PAPR for OFDM systems based on VLC. The simulation results are performed using Matlab-2021a for 1024 sub-carriers. As a result, the simulation results show that the proposed technique reduces the PAPR by 3.7 dB ($$86\%$$ 86 % ), 8.16 dB ($$93\%$$ 93 % ), and 1.81 dB ($$20\%$$ 20 % ) for DCO-OFDM, ACO-OFDM, and ADO-OFDM systems respectively. Furthermore, the technique has a significantly lower computational complexity than conventional OFDM systems based on VLC. Finally, the measures of performance through this article are bit error rate and complementary cumulative distribution function.

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A reduced PAPR hybrid OFDM visible light communication system

et al. 2022

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Orthogonal frequency division multiplexing (OFDM) is used by visible light communication (VLC) systems. Its main goal is to lessen inter-symbol interference's negative impacts. As a result, a lot of bandwidth and a high data rate are transmitted. Using OFDM-based VLC systems, nonetheless, have a high peak-to-average power ratio (PAPR). This research presents a new VLC system for indoor applications that reduces the PAPR while maintaining an acceptable bit error rate (BER). To achieve this, a hybrid pre-coding technique-based PAPR reduction solution is proposed; Vander-monde like matrix (VLM) combined with Gaussian matrix (GM). This technique takes advantage of both VLM and GM as a two stages for the signal to simultaneously reduce the PAPR and save the BER from damage. According to the results, the proposed solution (VLM in conjunction with GM) lowers the PAPR to 9.5 dB. Our system performs better when compared to other systems like discrete cosine transform (DCT), GM, VLM, DCT&GM, and original OFDM by 27%, 25%, 11%, 20%, and 34%, respectively.

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A novel PAPR reduction method for ADO-OFDM VLC systems

Cited by 8 publications

References 30 publications

Visible light communication performance using MIMO‐ADO‐OFDM system

Visible light communication performance using MIMO‐ADO‐OFDM system

Throughput improvement and PAPR reduction for OFDM-based VLC systems using an integrated STC-IMADJS technique

A reduced PAPR hybrid OFDM visible light communication system

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