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A Comprehensive Per...
A Comprehensive Performance Comparison of DFT-S DMT and QAM-DMT in UOWC System in Different Water Environments
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- Du, Ji (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.
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- Hong, Xiaojian (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Peoples R China.
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- Wang, Yuan (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.
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- Xu, Zhanpeng (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.
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- Zhao, Wenyi (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.
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- Lv, Nanfei (author)
- Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Peoples R China.
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- Fei, Chao (author)
- Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Peoples R China.;NingboTech Univ, Sch Informat Sci & Engn, Ningbo 315100, Peoples R China.
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- He, Sailing (author)
- KTH,Elektroteknisk teori och konstruktion,Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Peoples R China.
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Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China Zhejiang Univ, Key Lab Modern Opt Instrumentat, Natl Engn Res Ctr Opt Instruments, Ctr Opt & Electromagnet Res, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Peoples R China. (creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2021
- 2021
- English.
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In: IEEE Photonics Journal. - : Institute of Electrical and Electronics Engineers (IEEE). - 1943-0655. ; 13:1
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- In this paper, we experimentally demonstrate a 450-nm laser underwater optical wireless transmission system, in which a comprehensive investigation is made to show the significant performance improvement of the discrete Fourier transform spread discrete multi-tone (DFT-S DMT) as compared to the conventional quadrature amplitude modulation discrete multi-tone (QAM-DMT) modulation. DFT-S DMT outperforms QAM-DMT in terms of bit error rate (BER) performance due to low peak-to-average-power ratio (PAPR) and capability of counteracting high frequency fading in a band-limited underwater optical wireless communication (UOWC) system. In order to avoid signal-to-noise-ratio (SNR) degradation at fringe subcarriers, several zeros are padded at the edge of each block before DFT-S operation. The experimental results show the superiority of DFT-S DMT compared with QAM-DMT in different water environments, including turbidities, bubbles, and water flow. Data rates of similar to 16.16 Gbps and similar to 13.96 Gbps at a BER of 3.8 x 10(-3) are achieved by 16-QAM DFT-S DMT and 16-QAM-DMT over a 5-m water channel, respectively, which indicates that capacity enhancement of similar to 2.2 Gbps is obtained by the DFT-S DMT. Meanwhile, over 3-dB receiver sensitivity improvement can always be achieved by the DFT-S DMT at the tested underwater transmission distances. Combined with adaptive bit-power loading, 20.04 Gbps over a 5-m "clear ocean" channel transmission with a single laser diode (LD) is demonstrated. For a 35-m water link, the distance-data rate product reaches 498.4 Gbps*m. To the best of our knowledge, both the data rate and distance-data rate product are the largest among all the results reported for a single visible LD. Aimed at high-speed deep ocean applications, the studies are promising for future UOWC research.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- OFDM
- Licenses
- Indexes
- Wireless sensor networks
- Transmitters
- Storage tanks
- Signal to noise ratio
- Discrete Fourier transform spread (DFT-S)
- discrete multi-tone (DMT)
- underwater optical wireless communication (UOWC)
- visible laser diode (LD)
Publication and Content Type
- ref (subject category)
- art (subject category)
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