Papr Reduction of OFDM Signal by Using Combined Hadamard and Modified Meu-Law Companding Techniques

El-Nabawy, Mohamed M.; Aboul-Dahab, Mohamed A.; Elbarbary, Khairy A.

doi:10.5121/ijcnc.2014.6505

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…The following sections will use the following parameters used in the available related kinds of literature (i.e., RF and VLC) [20,32,38,50,[54][55][56]58]. Modulation order that uses = 16-QAM symbols.…”

Section: Simulation Resultsmentioning

confidence: 99%

Opto-Electronics Review

Mohammed,

Elnabawy,

Khalaf

2020

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Peak-to-average power ratio reduction techniques for visible light communication broadcasting systems are designed, simulated, and evaluated in this work. The proposed techniques are based on merging non-linear companding techniques with precoding techniques. This work aims to nominate an optimum novel scheme combining the low peakto-average power ratio with the acceptable bit error rate performance. Asymmetrically clipped optical orthogonal frequency division multiplexing with the low peak-to-average power ratio performance becomes more attractive to real-life visible light communication applications due to non-linearity elimination. The proposed schemes are compared and an optimum choice is nominated. Comparing the presented work and related literature reviews for peak-to-average power ratio reduction techniques are held to ensure the proposed schemes validity and effectiveness.

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Section: Simulation Resultsmentioning

confidence: 99%

Opto-Electronics Review

Mohammed,

Elnabawy,

Khalaf

2020

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“…The signal is compressed and expanded at the transmitter and receiver, respectively. [47] has the compressing:…”

Section: µ-Law Companding Transformmentioning

confidence: 99%

Non-Linear Companding Techniques With Aco-Ofdm-Based VLC Systems for Papr Reduction

Khalaf

Elnabawy

Azzam

2023

Journal of Advanced Engineering Trends

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In visible light communication (VLC) systems, optical orthogonal frequency division multiplexing (OOFDM) is used to reduce the effects of inter-symbol interference while simultaneously achieving fast data transmission speeds and large bandwidths. Asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) is one of the most OOFDM used. ACO-OFDM with low peak-to-average power ratio performance becomes essential for practical visible light communication broadcasting systems due to non-linearity elimination. The techniques for reducing the peak-to-average power ratio for visible light communication broadcasting systems are designed, simulated, and evaluated in this work. This work provides novel mixed Non-Liner Companding Techniques that target remarkable peak-toaverage power ratio performance with acceptable bit error rate performance for ACO-OFDMbased VLC systems. This work compares the designed techniques then nominates an optimum one that provides the optimum peak-to-average power ratio and bit error rate performance. Finally, the nominated technique will be compared to all related literatuers of ACO-OFDM-based VLC systems to ensure its novelty, validity, and effectiveness.

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