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- Title
Performance Analysis of LDPC-Coded OFDM in Underwater Wireless Optical Communications.
- Authors
Guo, Jianzhong; Xiao, Jinpeng; Chen, Jing; Shan, Xin; Kong, Dejin; Wu, Yan; Ai, Yong
- Abstract
The performance of Low-Density Parity-Check (LDPC)-coded Orthogonal Frequency Division Multiplexing (OFDM) is investigated over turbulence channels in underwater wireless optical communications (UWOC). The relation between the bit error ratio (BER) and parameters such as the scintillation coefficient, signal-to-noise ratio (SNR), length of LDPC code, and order of OFDM is quantified by simulation. Results show that while the OFDM with subcarrier quadrature amplitude modulation (QAM-OFDM) has slightly better anti-turbulence performance than the OFDM with subcarrier phase shift keying modulation (PSK-OFDM), the LDPC-coded QAM-OFDM has a much better performance than the QAM-OFDM and the LDPC-coded PSK-OFDM, and, at SNR = 12, it decreases the BER by four orders of magnitude compared to the 16QAM-OFDM system when the scintillation coefficient σ ξ 2 = 0.05.
- Subjects
OPTICAL communications; WIRELESS communications; BIT error rate; PHASE shift keying; ORTHOGONAL frequency division multiplexing; QUADRATURE amplitude modulation
- Publication
Photonics, 2023, Vol 10, Issue 3, p330
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics10030330