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Optical and Quantum Electronics

Erschienen in:

01.09.2020

QAM–OFDM transmission in underwater wireless optical communication system with limited resolution DAC

verfasst von: Yuanru Guo, Xiangqing Wang, Maosheng Fu

Erschienen in: Optical and Quantum Electronics | Ausgabe 9/2020

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Abstract

Underwater wireless optical communication (UWOC) can realize high speed, low delay and flexible information transmission. We experimentally demonstrate a 3-m UWOC system using blue laser diode and avalanche photodiode with quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM) transmission. We achieve net bit rates of 6.23 Gb/s at a bit error rate (BER) of 1.55 × 10⁻³, by using 128-QAM OFDM signals. High-order QAM signals require higher bit resolution of digital-to-analog converter (DAC). Therefore, the effect of quantization noise on transmission performance is further investigated. In order to meet the requirement that the BER is lower than 3.8 × 10⁻³, the bit resolution of DAC is required to be at least 5, 6 and 7 bit for 32-QAM, 64-QAM and 128-QAM signals, respectively.

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Titel: QAM–OFDM transmission in underwater wireless optical communication system with limited resolution DAC
verfasst von: Yuanru Guo
Xiangqing Wang
Maosheng Fu
Publikationsdatum: 01.09.2020
Verlag: Springer US
Erschienen in: Optical and Quantum Electronics / Ausgabe 9/2020
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-020-02529-9

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