Joint PAPR reduction with channel estimation for OFDM-based VLC systems
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Mansour Eliwi Ali
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Ayad A. Abdulkafi
Abstract
This paper presents a new combination of channel estimation (CE) methods and peak-to-average power ratio (PAPR) reduction techniques for orthogonal frequency division multiplexing (OFDM)-based visible light communication (VLC) systems. We first propose iterative clipping and filtering to minimize the PAPR of optical OFDM signals. Then, we introduce a computationally efficient, high-performance channel estimation approach using block-type pilots with modified clipped signals. The proposed method integrates clipping with three distinct CE techniques, resulting in both significant PAPR reduction and enhanced bit error rate (BER) performance. Among the CE methods evaluated, the expectation-maximization (EM) technique provides better BER results compared to other approaches. Simulation results confirm that the combined use of clipping and advanced CE methods leads to notable improvements in PAPR reduction and BER performance for OFDM-based VLC systems.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Author contributions: Both authors Mansour Eliwi Ali and Ayad A. Abdulkafi have equal contribution in developing the proposed system, executing simulations, and writing the manuscript. The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: The raw data can be obtained on request from the corresponding author.
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