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Performance Analysis of LDPC-Coded OFDM in Underwater Wireless Optical Communications
Photonics ( IF 2.14 ) Pub Date : 2023-03-20 , DOI: 10.3390/photonics10030330
Jianzhong Guo, Jinpeng Xiao, Jing Chen, Xin Shan, Dejin Kong, Yan Wu, Yong Ai

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 σξ2 = 0.05.

中文翻译:

LDPC编码OFDM在水下无线光通信中的性能分析

研究了水下无线光通信 (UWOC) 中湍流信道上低密度奇偶校验 (LDPC) 编码的正交频分复用 (OFDM) 的性能。通过仿真量化了比特误码率(BER)与闪烁系数、信噪比(SNR)、LDPC码长度和OFDM阶数等参数之间的关系。结果表明,虽然具有子载波正交幅度调制的 OFDM (QAM-OFDM) 比具有子载波相移键控调制的 OFDM (PSK-OFDM) 具有更好的抗湍流性能,但 LDPC 编码的 QAM-OFDM 具有更好的性能比 QAM-OFDM 和 LDPC 编码的 PSK-OFDM,并且在 SNR = 12 时,当闪烁系数 σξ2 = 0.05 时,它比 16QAM-OFDM 系统降低了四个数量级的 BER。
更新日期:2023-03-20
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