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Improving the Performance of Long Reach UOWC With Multiband DFT-Spread
Zhejiang Univ, Ctr Opt & Electromagnet Res, Natl Engn Res Ctr Opt Instruments, Hangzhou 310058, Zhejiang, Peoples R China.ORCID iD: 0000-0002-8654-7984
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2019 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 31, no 16, p. 1315-1318Article in journal (Refereed) Published
Abstract [en]

In this letter, a multiband discrete-Fourier-transform spread (DFT-spread) is introduced to reduce the peak-to-average-power ratio (PAPR) of discrete multitone (DMT)-based underwater optical wireless communication (UOWC) system. The performance of different multiband DFT-spread DMT schemes in a wide underwater transmission range (from 5 to 55 m at a fixed transmission data rate of 5.6 Gb/s) is experimentally investigated. The measured results show that the 1-band DFT-spread and 2-band DFT-spread DMT can significantly improve the system performance compared with the conventional clipping DMT, while the 1-band DFT-spread gives the best performance. Due to the single carrier frequency domain equalization-like characteristic, the 1-band DFT-spread exhibits a relatively uniform signal-to-noise ratio (SNR) profile, which shows the robustness to high frequency fading in the band-limited UOWC system. These intrinsic advantages could jointly ease the bit error rate (BER) deterioration in a long reach UOWC system. Furthermore, the measured data rate-distance product has reached 308 Gb/s*m (i.e., 55-m * 5.6 Gb/s), which to the best of our knowledge is the largest for the single modulation format.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2019. Vol. 31, no 16, p. 1315-1318
Keywords [en]
Underwater optical wireless communication (UOWC), multiband DFT-spread, discrete multi-tone (DMT), visible laser diode (LD)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-255725DOI: 10.1109/LPT.2019.2923527ISI: 000476811600002Scopus ID: 2-s2.0-85069793626OAI: oai:DiVA.org:kth-255725DiVA, id: diva2:1342855
Note

QC 20190814

Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved

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