PAPR reduction of DC biased optical OFDM using combined clipping and PTS techniques

Abdulkafi, Ayad Atiyah; Alias, Mohamad Yusoff; Hussein, Yaseein Soubhi; Omar, Nazaruddin; Salleh, Mohd Kamarulzamin

doi:10.1109/micc.2017.8311760

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…The most common statistic for showing a drop in PAPR is known as the CCDF of a PAPR, and it measures the likelihood that the PAPR of an OFDM frame would surpass a particular threshold value, PAPR 0 (Abdulkafi et al 2017). Hence, it is defined as (Freag et al 2018)…”

Section: System Modelmentioning

confidence: 99%

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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Section: System Modelmentioning

confidence: 99%

A reduced PAPR hybrid OFDM visible light communication system

et al. 2022

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“…where max(x(t) 2 ) is the peak power and E[x(t)] 2 is the average power. The PAPR reduction can be measured using the complementary cumulative distribution function (CCDF) [15]. The CCDF is the probability that the PAPR value reaches a certain OFDM symbol threshold and is denoted by the CCDF based on PAPR (PAPR0) [14].…”

Section: Papr Issuementioning

confidence: 99%

“…Our recent works [11], [13] have studied the VLC performance; in [2], the enhanced ADO-OFDM was proposed with Hamming coding/decoding to improve performance, and in [13], precoding techniques with Viterbi decoding was utilized with different O-OFDM to alleviate LED non-linearity. There are many methods were exist to overcome the PAPR problems in O-OFDM systems; these methods were proposed to reduce PAPR, such as the clipping method [14], partial transmit sequences (PTS) [15], selective mapping (SLM) [16], and nonlinear companding techniques [7]. The shortcomings of PAPR reduction methods such as the complexity, bit-error-rate (BER) degradation, and the average optical power swelling make the nonlinear companding method is the best option for the PAPR issue.…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction for Different O-OFDM in VLC Using -Law Companding and Convolutional Encoder

2022

IJCCCE

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Researchers have extensively utilized optical orthogonal frequency division multiplexing (O-OFDM) in visible light communication (VLC) to achieve high data rate transmission for free spectrum bandwidth. The peak-to-average power ratio (PAPR) is the critical challenge for VLC systems-based O-OFDM that produces non-linearity and degrades performance. In this paper, a proposed model for PAPR reduction can be applied with different O-OFDM technologies. This model considered using -law companding with O-OFDM transmitter to compress high amplitude peaks and restore the signals using de-companding in the receiver. The obtained simulation results show an efficient achievement of about 75% PAPR reduction compared with the original O-OFDM for different techniques. Furthermore, The convolutional encoder with Viterbi decoder is used with our proposed model for improvement BER performance and tradeoff with PAPR. The BER performance for different coding schemes, O-OFDM technologies, and modulation orders has been graphed and compared. It can notice the convolutional encoder/Viterbi satisfies better BER than Hamming coding/decoding. However, the number of memory cells of the convolutional encoder plays an essential role in BER improvement. Index Terms— ACO-OFDM, ADO-OFDM, DCO-OFDM, PAPR, VLC.

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