Low-PAPR and Low-Complexity Transmission Schemes for DHT-Based Underwater Optical Wireless Systems
Year: 2025
Type: article
Abstract: This paper presents a low-complexity, low-peak-to-average power ratio (PAPR) transmission scheme for discrete Hartley transform (DHT)-based underwater optical wireless communication (UOWC) systems, termed LPC-DHT-OFDM. The proposed scheme reduces transmitter complexity and mitigates nonlinear distortion by separately processing the real and imaginary parts of the modulated symbols. The real part is generated using multiply-accumulate and anti-symmetric operations, while the imaginary part is produced through a repetition-based method, thereby eliminating conventional DHT/IDHT operations. Non-negative signals are obtained through zero-level clipping and DC biasing and are transmitted simultaneously via two LEDs. As a member of the DHT-spread OFDM family, LPC-DHT-OFDM achieves substantial reductions in both PAPR and computational complexity, making it a promising candidate for practical UOWC applications. In addition, this paper provides the numerical analysis of its spectral efficiency, electrical and optical power requirements, PAPR, bit error rate, and computational complexity.
Source: IEEE photonics journal
Author: Wei-Wen Hu
Institution: National Formosa University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,075
OpenAlex ID: W4416714615
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