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- Chen, RuilinZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
Experimental demonstration of real-time optical DFT-S DMT signal transmission for a blue-LED-based UWOC system using spatial diversity reception
- Article/chapterEnglish2023
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- Optica Publishing Group,2023
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- LIBRIS-ID:oai:DiVA.org:kth-324642
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-324642URI
- https://doi.org/10.1364/AO.478405DOI
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- Language:English
- Summary in:English
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- QC 20230309
- Underwater wireless optical communication (UWOC) has broad prospects in underwater real-time applications. We design and experimentally demonstrate a real-time discrete Fourier transform spread discrete multi-tone (DFT-S DMT) signal transmission based on a field programmable gate array for a blue-LED-based UWOC system with a data rate of up to 30 Mbps over a 15-m underwater channel. The architecture and usage of an on-chip resource as well as power consumption are analyzed and discussed. To reduce the impacts of multipath fading and received intensity fluctuation, spatial diversity reception is also introduced. Furthermore, the receiver sensitivity at a speci-fied bit error rate (BER) threshold and the quality of the images are evaluated using three types of Reed-Solomon (RS) codes. At the BER threshold of 10-4, over 2.8-dB receiver sensitivity improvement is obtained by the DFT-S DMT scheme with the RS (64, 56) code as compared to the uncoded one at the data rate of 30 Mbps. The perform-ance of BER, color difference, and structural similarity in the image transmission of DFT-S DMT is superior to that of the conventional hard clipping quadrature amplitude modulation DMT in a high-data-rate region because of the low peak-to-average-power ratio and ability to mitigate high-frequency fading in a band-limited UWOC system. With schemes of the RS code, DFT-S, and diversity reception, error-free transmission of images is achieved over a 15-m water channel. The proposed UWOC system has the advantages of low power consumption and porta-bility, which foresees a bright future in underwater applications over short to moderate distances.
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- Du, JiZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- Wang, YuanZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- Fei, ChaoZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- Zhang, TianyiZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- Tian, Jiahan (author)
- Zhang, GuowuZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- Hong, XiaojianZhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China. (author)
- He, SailingKTH,Elektroteknisk teori och konstruktion,Zhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China.(Swepub:kth)u1tir6md (author)
- Zhejiang Univ, Ningbo Res Inst, Coll Opt Sci & Engn, Natl Engn Res Ctr Opt Instruments,Ctr Opt & Electr, Hangzhou 310058, Peoples R China.Elektroteknisk teori och konstruktion (creator_code:org_t)
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- In:Applied Optics: Optica Publishing Group62:3, s. 541-5511559-128X2155-3165
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