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IEEE Xplore webinar: Search Strategies to Supercharge Your Research Experience.

March 2025

DOI:10.13140/RG.2.2.27575.64163

Conference: IEEE Xplore webinar

Authors:

Murtadha Shukur

Al-Furat Al-Awsat Technical University

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MURTADHA ALI NSAIF SHUKUR

March 05, 2025

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IEEE Xplore webinar, “Search Strategies to Personalize your Research Experience.”

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To help authors gain maximum exposure for their groundbreaking research and application-oriented articles, IEEE offers three options for open-access (OA) publishing, all designed to meet the varying needs of our authors throughout their careers.

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Analyzing the impact of nonlinear distortions on OFDM-Based visible light communication systems

October 2024 · Al-Qadisiyah Journal for Engineering Sciences

Murtadha Shukur

Visible light communication (VLC) has gained attraction for its use in high-speed wireless connectivity leveraging LED lighting elements. Orthogonal Frequency Division Multiplexing (OFDM) is an attractive modulation scheme due to its spectral efficiency and resilience to multipath distortion. However, the nonlinear electro-optic transfer characteristics of optical components introduce signal ... [Show full abstract] clipping and quantization noise which corrupt OFDM signals. This paper provides an in-depth analysis of clipping and quantization noise to quantify the impact of LED nonlinearities on OFDM-based VLC system performance. Detailed mathematical models are derived for clipping distortions caused by LED optical power saturation and quantization errors from ADC/DAC finite precision in the modulator and driver circuitry. This analysis is quantified through simulations of the degradations in terms of error vector magnitude (EVM), signal-to-noise ratio (SNR) loss, and bit error rate (BER) under varying clipping ratios and quantization bit-depths. The 16-QAM OFDM transmission shows that the LED driver should possess at least 12 dB signal linear dynamic range and 3-bit quantization to restrict SNR penalty within 3 dB. Adaptive tone mapping and digital pre-distortion techniques are examined to compensate for intensity distortions enabling high-speed OFDM transmission over VLC links.

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Last Updated: 07 Mar 2025